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jvm 性能调优工具之 jinfo命令详解

作者：不正经 | 2024-04-04 13:39:13

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jinfo

一、jinfo

1、简介

        jinfo(Configuration Info for Java) 查看虚拟机配置参数信思，也可用于调整虚拟机的配置参数。

        在很多情况下，Java应用程序不会指定所有的Java虚拟机参数。而此时，开发人员可能不知道某一个具体的Java虚拟机参数的默认值。在这种情况下，可能需要通过查找文档获取某个参数的默认值。这个查找过程可能是非常艰难的。但有了 jinfo工具，开发人员可以很方便地找到Java虚拟机参数的当前值。

jinfo不仅可以查看运行时某一个Java虚拟机参数的实际取值， 甚至可以在运行时修改部分参 数，并使之立即生效。 但是，并非所有参数都支持动态修改。参数只有被标记 manageable的flag可以被实时修改。其实，这个修改能力是 极其有限的。

2、jinfo -sysprops pid ：查看该进程的全部配置信息

 描述：输出当前 jvm 进行的全部的系统属性

2.1、启动如下程序

  1. package com.kgf.kgfjavalearning2021.jvm;
  2.  
  3. import java.util.ArrayList;
  4.  
  5. /***
  6.  * 测试GC的频率:
  7.  * 设置内存大小：-Xmx60m -XX:SurvivorRatio=8
  8.  *
  9.  * -Xmx60m: 表示是最大堆的大小, 也就是当你的虚拟机启动后， 就会分配这么大的堆内存给你
  10.  * -XX:SurvivorRatio=8:
  11.  *      设置新生代中eden和S0/S1空间的比例
  12.  *      默认
  13.  *          -XX:SurvivorRatio=8,Eden:S0:S1=8:1:1
  14.  *      假如
  15.  *          -XX:SurvivorRatio=4,Eden:S0:S1=4:1:1
  16.  *          SurvivorRatio值就是设置Eden区的比例占多少,S0/S1相同
  17.  *
  18.  */
  19. public class GCTest {
  20.  
  21.     public static void main(String[] args) {
  22.  
  23.         ArrayList<byte[]> list = new ArrayList<>();
  24.  
  25.         for (int i = 0; i < 1000; i++) {
  26.             byte[] arr = new byte[1024*100];//每次向list中存放100kb的字节数组
  27.             list.add(arr);
  28.             try {
  29.                 Thread.sleep(100);
  30.             } catch (InterruptedException e) {
  31.                 e.printStackTrace();
  32.             }
  33.         }
  34.     }
  35.  
  36. }

在idea中设置堆内存：

 2.2、使用jinfo命令查看,查看到的参数其实在我们的java中是可以通过system.getProperties()参数进行获取到的，其实就是环境变量

命令：jinfo -sysprops pid

  1. C:\Users\86136>jps
  2. 10864 GCTest
  3. 11248 RemoteMavenServer
  4. 2052
  5. 8616 Jps
  6. 4972 Launcher
  7.  
  8. C:\Users\86136>jinfo -sysprops 10864
  9. Attaching to process ID 10864, please wait...
  10. Debugger attached successfully.
  11. Server compiler detected.
  12. JVM version is 25.51-b03
  13. java.runtime.name = Java(TM) SE Runtime Environment
  14. java.vm.version = 25.51-b03
  15. sun.boot.library.path = D:\jdk1.8.0_51\jre\bin
  16. java.vendor.url = http://java.oracle.com/
  17. java.vm.vendor = Oracle Corporation
  18. path.separator = ;
  19. file.encoding.pkg = sun.io
  20. java.vm.name = Java HotSpot(TM) 64-Bit Server VM
  21. sun.os.patch.level =
  22. sun.java.launcher = SUN_STANDARD
  23. user.script =
  24. user.country = CN
  25. user.dir = E:\WorkSpace\kgf-java-learning2021
  26. java.vm.specification.name = Java Virtual Machine Specification
  27. java.runtime.version = 1.8.0_51-b16
  28. java.awt.graphicsenv = sun.awt.Win32GraphicsEnvironment
  29. os.arch = amd64
  30. java.endorsed.dirs = D:\jdk1.8.0_51\jre\lib\endorsed
  31. line.separator =
  32.  
  33. java.io.tmpdir = C:\Users\86136\AppData\Local\Temp\
  34. java.vm.specification.vendor = Oracle Corporation
  35. user.variant =
  36. os.name = Windows 8.1
  37. sun.jnu.encoding = GBK
  38. java.library.path = D:\jdk1.8.0_51\bin;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;E:\WorkSpace\software\Python37\Scripts\;E:\WorkSpace\software\Python37\;D:\oracle12c\product\12.2.0\dbhome_1\bin;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\iCLS\;C:\Program Files\Intel\Intel(R) Management Engine Components\iCLS\;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\OpenSSH\;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;D:\jdk1.8.0_51\bin;D:\apache-maven-3.5.2\bin;D:\TortoiseSVN\bin;D:\oracleClient\instantclient_12_2;D:\mysql-5.7.24-winx64\bin;D:\zookeeper-3.4.10\bin;d:\Git\cmd;D:\Redis-x64-3.2.100;D:\hadoopWorkSpace\hadoop-2.7.2\bin;C:\Program Files (x86)\Common Files\Thunder Network\KanKan\Codecs;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;D:\scala-2.11.8\bin;D:\gradle-6.7\bin;D:\nodejs\;D:\OpenSSL-Win64\bin;D:\software\Vagrant\bin;C:\Ruby27-x64\bin;C:\Users\86136\AppData\Local\Microsoft\WindowsApps;;D:\Microsoft VS Code\bin;C:\Users\86136\AppData\Roaming\npm;.
  39. java.specification.name = Java Platform API Specification
  40. java.class.version = 52.0
  41. sun.management.compiler = HotSpot 64-Bit Tiered Compilers
  42. os.version = 6.3
  43. user.home = C:\Users\86136
  44. user.timezone = Asia/Shanghai
  45. java.awt.printerjob = sun.awt.windows.WPrinterJob
  46. file.encoding = UTF-8
  47. java.specification.version = 1.8
  48. user.name = 86136
  49. java.class.path = D:\jdk1.8.0_51\jre\lib\charsets.jar;D:\jdk1.8.0_51\jre\lib\deploy.jar;D:\jdk1.8.0_51\jre\lib\ext\access-bridge-64.jar;D:\jdk1.8.0_51\jre\lib\ext\cldrdata.jar;D:\jdk1.8.0_51\jre\lib\ext\dnsns.jar;D:\jdk1.8.0_51\jre\lib\ext\jaccess.jar;D:\jdk1.8.0_51\jre\lib\ext\jfxrt.jar;D:\jdk1.8.0_51\jre\lib\ext\localedata.jar;D:\jdk1.8.0_51\jre\lib\ext\nashorn.jar;D:\jdk1.8.0_51\jre\lib\ext\sunec.jar;D:\jdk1.8.0_51\jre\lib\ext\sunjce_provider.jar;D:\jdk1.8.0_51\jre\lib\ext\sunmscapi.jar;D:\jdk1.8.0_51\jre\lib\ext\sunpkcs11.jar;D:\jdk1.8.0_51\jre\lib\ext\zipfs.jar;D:\jdk1.8.0_51\jre\lib\javaws.jar;D:\jdk1.8.0_51\jre\lib\jce.jar;D:\jdk1.8.0_51\jre\lib\jfr.jar;D:\jdk1.8.0_51\jre\lib\jfxswt.jar;D:\jdk1.8.0_51\jre\lib\jsse.jar;D:\jdk1.8.0_51\jre\lib\management-agent.jar;D:\jdk1.8.0_51\jre\lib\plugin.jar;D:\jdk1.8.0_51\jre\lib\resources.jar;D:\jdk1.8.0_51\jre\lib\rt.jar;E:\WorkSpace\kgf-java-learning2021\target\classes;D:\repository\org\springframework\boot\spring-boot-starter-web\2.5.6\spring-boot-starter-web-2.5.6.jar;D:\repository\org\springframework\boot\spring-boot-starter\2.5.6\spring-boot-starter-2.5.6.jar;D:\repository\org\springframework\boot\spring-boot-starter-logging\2.5.6\spring-boot-starter-logging-2.5.6.jar;D:\repository\ch\qos\logback\logback-classic\1.2.6\logback-classic-1.2.6.jar;D:\repository\ch\qos\logback\logback-core\1.2.6\logback-core-1.2.6.jar;D:\repository\org\apache\logging\log4j\log4j-to-slf4j\2.14.1\log4j-to-slf4j-2.14.1.jar;D:\repository\org\apache\logging\log4j\log4j-api\2.14.1\log4j-api-2.14.1.jar;D:\repository\org\slf4j\jul-to-slf4j\1.7.32\jul-to-slf4j-1.7.32.jar;D:\repository\jakarta\annotation\jakarta.annotation-api\1.3.5\jakarta.annotation-api-1.3.5.jar;D:\repository\org\yaml\snakeyaml\1.28\snakeyaml-1.28.jar;D:\repository\org\springframework\boot\spring-boot-starter-json\2.5.6\spring-boot-starter-json-2.5.6.jar;D:\repository\com\fasterxml\jackson\core\jackson-databind\2.12.5\jackson-databind-2.12.5.jar;D:\repository\com\fasterxml\jackson\core\jackson-annotations\2.12.5\jackson-annotations-2.12.5.jar;D:\repository\com\fasterxml\jackson\core\jackson-core\2.12.5\jackson-core-2.12.5.jar;D:\repository\com\fasterxml\jackson\datatype\jackson-datatype-jdk8\2.12.5\jackson-datatype-jdk8-2.12.5.jar;D:\repository\com\fasterxml\jackson\datatype\jackson-datatype-jsr310\2.12.5\jackson-datatype-jsr310-2.12.5.jar;D:\repository\com\fasterxml\jackson\module\jackson-module-parameter-names\2.12.5\jackson-module-parameter-names-2.12.5.jar;D:\repository\org\springframework\boot\spring-boot-starter-tomcat\2.5.6\spring-boot-starter-tomcat-2.5.6.jar;D:\repository\org\apache\tomcat\embed\tomcat-embed-core\9.0.54\tomcat-embed-core-9.0.54.jar;D:\repository\org\apache\tomcat\embed\tomcat-embed-el\9.0.54\tomcat-embed-el-9.0.54.jar;D:\repository\org\apache\tomcat\embed\tomcat-embed-websocket\9.0.54\tomcat-embed-websocket-9.0.54.jar;D:\repository\org\springframework\spring-web\5.3.12\spring-web-5.3.12.jar;D:\repository\org\springframework\spring-beans\5.3.12\spring-beans-5.3.12.jar;D:\repository\org\springframework\spring-webmvc\5.3.12\spring-webmvc-5.3.12.jar;D:\repository\org\springframework\spring-aop\5.3.12\spring-aop-5.3.12.jar;D:\repository\org\springframework\spring-context\5.3.12\spring-context-5.3.12.jar;D:\repository\org\springframework\spring-expression\5.3.12\spring-expression-5.3.12.jar;D:\repository\org\springframework\boot\spring-boot-devtools\2.5.6\spring-boot-devtools-2.5.6.jar;D:\repository\org\springframework\boot\spring-boot\2.5.6\spring-boot-2.5.6.jar;D:\repository\org\springframework\boot\spring-boot-autoconfigure\2.5.6\spring-boot-autoconfigure-2.5.6.jar;D:\repository\org\projectlombok\lombok\1.18.16\lombok-1.18.16.jar;D:\repository\org\slf4j\slf4j-api\1.7.32\slf4j-api-1.7.32.jar;D:\repository\org\springframework\spring-core\5.3.12\spring-core-5.3.12.jar;D:\repository\org\springframework\spring-jcl\5.3.12\spring-jcl-5.3.12.jar;D:\repository\com\google\guava\guava\20.0\guava-20.0.jar;D:\repository\org\apache\commons\commons-lang3\3.12.0\commons-lang3-3.12.0.jar;D:\repository\com\alibaba\fastjson\1.2.75\fastjson-1.2.75.jar;D:\repository\cn\hutool\hutool-all\5.5.1\hutool-all-5.5.1.jar;D:\repository\org\apache\poi\poi-ooxml\4.1.2\poi-ooxml-4.1.2.jar;D:\repository\org\apache\commons\commons-compress\1.19\commons-compress-1.19.jar;D:\repository\com\github\virtuald\curvesapi\1.06\curvesapi-1.06.jar;D:\repository\org\apache\poi\poi-ooxml-schemas\4.1.2\poi-ooxml-schemas-4.1.2.jar;D:\repository\org\apache\xmlbeans\xmlbeans\3.1.0\xmlbeans-3.1.0.jar;D:\repository\org\apache\poi\poi\4.1.2\poi-4.1.2.jar;D:\repository\commons-codec\commons-codec\1.15\commons-codec-1.15.jar;D:\repository\org\apache\commons\commons-collections4\4.4\commons-collections4-4.4.jar;D:\repository\org\apache\commons\commons-math3\3.6.1\commons-math3-3.6.1.jar;D:\repository\com\zaxxer\SparseBitSet\1.2\SparseBitSet-1.2.jar;D:\JetBrains\idea20190303\lib\idea_rt.jar
  50. java.vm.specification.version = 1.8
  51. sun.arch.data.model = 64
  52. sun.java.command = com.kgf.kgfjavalearning2021.jvm.GCTest
  53. java.home = D:\jdk1.8.0_51\jre
  54. user.language = zh
  55. java.specification.vendor = Oracle Corporation
  56. awt.toolkit = sun.awt.windows.WToolkit
  57. java.vm.info = mixed mode
  58. java.version = 1.8.0_51
  59. java.ext.dirs = D:\jdk1.8.0_51\jre\lib\ext;C:\WINDOWS\Sun\Java\lib\ext
  60. sun.boot.class.path = D:\jdk1.8.0_51\jre\lib\resources.jar;D:\jdk1.8.0_51\jre\lib\rt.jar;D:\jdk1.8.0_51\jre\lib\sunrsasign.jar;D:\jdk1.8.0_51\jre\lib\jsse.jar;D:\jdk1.8.0_51\jre\lib\jce.jar;D:\jdk1.8.0_51\jre\lib\charsets.jar;D:\jdk1.8.0_51\jre\lib\jfr.jar;D:\jdk1.8.0_51\jre\classes
  61. java.vendor = Oracle Corporation
  62. file.separator = \
  63. java.vendor.url.bug = http://bugreport.sun.com/bugreport/
  64. sun.io.unicode.encoding = UnicodeLittle
  65. sun.cpu.endian = little
  66. sun.desktop = windows
  67. sun.cpu.isalist = amd64
  68.  
  69. C:\Users\86136>

3、jinfo -flags pid： 查看曾经赋过值的参数值

命令：jinfo -flags 10696

  1. C:\Users\86136>jps
  2. 11248 RemoteMavenServer
  3. 4992 Launcher
  4. 2052
  5. 10696 GCTest
  6. 13596 Jps
  7.  
  8. C:\Users\86136>jinfo -flags 10696
  9. Attaching to process ID 10696, please wait...
  10. Debugger attached successfully.
  11. Server compiler detected.
  12. JVM version is 25.51-b03
  13. Non-default VM flags: -XX:CICompilerCount=4 -XX:InitialHeapSize=62914560 -XX:MaxHeapSize=62914560 -XX:MaxNewSize=20971520 -XX:MinHeapDeltaBytes=524288 -XX:NewSize=20971520 -XX:OldSize=41943040 -XX:SurvivorRatio=8 -XX:+UseCompressedClassPointers -XX:+UseCompressedOops -XX:+UseFastUnorderedTimeStamps -XX:-UseLargePagesIndividualAllocation -XX:+UseParallelGC
  14. Command line:  -Xmx60m -XX:SurvivorRatio=8 -javaagent:D:\JetBrains\idea20190303\lib\idea_rt.jar=1036:D:\JetBrains\idea20190303\bin -Dfile.encoding=UTF-8
  15.  
  16. C:\Users\86136>

4、jinfo -flag <具体参数> pid： 查看具体参数的值

上面我们在程序里面设置了最大的堆内存是60M,这里的内存刚好是60M 

5、使用jinfo进行参数修改

jinfo不仅可以查看运行时某一个Java虚拟机参数的实际取值， 甚至可以在运行时修改部分参 数，并使之立即生效。 但是，并非所有参数都支持动态修改。参数只有被标记 manageable的flag可以被实时修改。其实，这个修改能力是 极其有限的

5.1、布尔类型: jinfo -flag +-参数 pid

5.2、非布尔类型: jinfo -flag 参数名=参数值 pid

6、查看JVM启动参数值

java -XX: -PrintFlagslnitial 查看所有JVM参数启动的初始值
java -XX: +PrintFlagsFinal 查看所有JVM参数的最终值(这个用的更多一些)
java -XX: +PrintCommandLineflags 查看那些已经被用户或者JVM设置过的详细的XX参数的名称和值

上面前两个用的比较多一些，特别是第二个

6.1、我们使用java -XX: +PrintFlagsFinal输出到一个文件中

命令：java -XX: +PrintFlagsFinal >1.txt

1.txt内容如下：

下面我们查看JVM的最大堆内存：

可以发现最大堆内存为4G,初始化堆内存为256M，安装下面的计算时正确的，因为我的电脑是16G的内存

  • 默认情况下:
    • 初始内存大小：物理电脑内存大小/64
    • 最大内存大小：物理电脑内存大小/4
  1. [Global flags]
  2.     uintx AdaptiveSizeDecrementScaleFactor          = 4                                   {product}
  3.     uintx AdaptiveSizeMajorGCDecayTimeScale         = 10                                  {product}
  4.     uintx AdaptiveSizePausePolicy                   = 0                                   {product}
  5.     uintx AdaptiveSizePolicyCollectionCostMargin    = 50                                  {product}
  6.     uintx AdaptiveSizePolicyInitializingSteps       = 20                                  {product}
  7.     uintx AdaptiveSizePolicyOutputInterval          = 0                                   {product}
  8.     uintx AdaptiveSizePolicyWeight                  = 10                                  {product}
  9.     uintx AdaptiveSizeThroughPutPolicy              = 0                                   {product}
  10.     uintx AdaptiveTimeWeight                        = 25                                  {product}
  11.      bool AdjustConcurrency                         = false                               {product}
  12.      bool AggressiveOpts                            = false                               {product}
  13.      intx AliasLevel                                = 3                                   {C2 product}
  14.      bool AlignVector                               = false                               {C2 product}
  15.      intx AllocateInstancePrefetchLines             = 1                                   {product}
  16.      intx AllocatePrefetchDistance                  = 192                                 {product}
  17.      intx AllocatePrefetchInstr                     = 3                                   {product}
  18.      intx AllocatePrefetchLines                     = 4                                   {product}
  19.      intx AllocatePrefetchStepSize                  = 64                                  {product}
  20.      intx AllocatePrefetchStyle                     = 1                                   {product}
  21.      bool AllowJNIEnvProxy                          = false                               {product}
  22.      bool AllowNonVirtualCalls                      = false                               {product}
  23.      bool AllowParallelDefineClass                  = false                               {product}
  24.      bool AllowUserSignalHandlers                   = false                               {product}
  25.      bool AlwaysActAsServerClassMachine             = false                               {product}
  26.      bool AlwaysCompileLoopMethods                  = false                               {product}
  27.      bool AlwaysLockClassLoader                     = false                               {product}
  28.      bool AlwaysPreTouch                            = false                               {product}
  29.      bool AlwaysRestoreFPU                          = false                               {product}
  30.      bool AlwaysTenure                              = false                               {product}
  31.      bool AssertOnSuspendWaitFailure                = false                               {product}
  32.      bool AssumeMP                                  = false                               {product}
  33.      intx AutoBoxCacheMax                           = 128                                 {C2 product}
  34.     uintx AutoGCSelectPauseMillis                   = 5000                                {product}
  35.      intx BCEATraceLevel                            = 0                                   {product}
  36.      intx BackEdgeThreshold                         = 100000                              {pd product}
  37.      bool BackgroundCompilation                     = true                                {pd product}
  38.     uintx BaseFootPrintEstimate                     = 268435456                           {product}
  39.      intx BiasedLockingBulkRebiasThreshold          = 20                                  {product}
  40.      intx BiasedLockingBulkRevokeThreshold          = 40                                  {product}
  41.      intx BiasedLockingDecayTime                    = 25000                               {product}
  42.      intx BiasedLockingStartupDelay                 = 4000                                {product}
  43.      bool BindGCTaskThreadsToCPUs                   = false                               {product}
  44.      bool BlockLayoutByFrequency                    = true                                {C2 product}
  45.      intx BlockLayoutMinDiamondPercentage           = 20                                  {C2 product}
  46.      bool BlockLayoutRotateLoops                    = true                                {C2 product}
  47.      bool BranchOnRegister                          = false                               {C2 product}
  48.      bool BytecodeVerificationLocal                 = false                               {product}
  49.      bool BytecodeVerificationRemote                = true                                {product}
  50.      bool C1OptimizeVirtualCallProfiling            = true                                {C1 product}
  51.      bool C1ProfileBranches                         = true                                {C1 product}
  52.      bool C1ProfileCalls                            = true                                {C1 product}
  53.      bool C1ProfileCheckcasts                       = true                                {C1 product}
  54.      bool C1ProfileInlinedCalls                     = true                                {C1 product}
  55.      bool C1ProfileVirtualCalls                     = true                                {C1 product}
  56.      bool C1UpdateMethodData                        = true                                {C1 product}
  57.      intx CICompilerCount                          := 4                                   {product}
  58.      bool CICompilerCountPerCPU                     = true                                {product}
  59.      bool CITime                                    = false                               {product}
  60.      bool CMSAbortSemantics                         = false                               {product}
  61.     uintx CMSAbortablePrecleanMinWorkPerIteration   = 100                                 {product}
  62.      intx CMSAbortablePrecleanWaitMillis            = 100                                 {manageable}
  63.     uintx CMSBitMapYieldQuantum                     = 10485760                            {product}
  64.     uintx CMSBootstrapOccupancy                     = 50                                  {product}
  65.      bool CMSClassUnloadingEnabled                  = true                                {product}
  66.     uintx CMSClassUnloadingMaxInterval              = 0                                   {product}
  67.      bool CMSCleanOnEnter                           = true                                {product}
  68.      bool CMSCompactWhenClearAllSoftRefs            = true                                {product}
  69.     uintx CMSConcMarkMultiple                       = 32                                  {product}
  70.      bool CMSConcurrentMTEnabled                    = true                                {product}
  71.     uintx CMSCoordinatorYieldSleepCount             = 10                                  {product}
  72.      bool CMSDumpAtPromotionFailure                 = false                               {product}
  73.      bool CMSEdenChunksRecordAlways                 = true                                {product}
  74.     uintx CMSExpAvgFactor                           = 50                                  {product}
  75.      bool CMSExtrapolateSweep                       = false                               {product}
  76.     uintx CMSFullGCsBeforeCompaction                = 0                                   {product}
  77.     uintx CMSIncrementalDutyCycle                   = 10                                  {product}
  78.     uintx CMSIncrementalDutyCycleMin                = 0                                   {product}
  79.      bool CMSIncrementalMode                        = false                               {product}
  80.     uintx CMSIncrementalOffset                      = 0                                   {product}
  81.      bool CMSIncrementalPacing                      = true                                {product}
  82.     uintx CMSIncrementalSafetyFactor                = 10                                  {product}
  83.     uintx CMSIndexedFreeListReplenish               = 4                                   {product}
  84.      intx CMSInitiatingOccupancyFraction            = -1                                  {product}
  85.     uintx CMSIsTooFullPercentage                    = 98                                  {product}
  86.    double CMSLargeCoalSurplusPercent                = 0.950000                            {product}
  87.    double CMSLargeSplitSurplusPercent               = 1.000000                            {product}
  88.      bool CMSLoopWarn                               = false                               {product}
  89.     uintx CMSMaxAbortablePrecleanLoops              = 0                                   {product}
  90.      intx CMSMaxAbortablePrecleanTime               = 5000                                {product}
  91.     uintx CMSOldPLABMax                             = 1024                                {product}
  92.     uintx CMSOldPLABMin                             = 16                                  {product}
  93.     uintx CMSOldPLABNumRefills                      = 4                                   {product}
  94.     uintx CMSOldPLABReactivityFactor                = 2                                   {product}
  95.      bool CMSOldPLABResizeQuicker                   = false                               {product}
  96.     uintx CMSOldPLABToleranceFactor                 = 4                                   {product}
  97.      bool CMSPLABRecordAlways                       = true                                {product}
  98.     uintx CMSParPromoteBlocksToClaim                = 16                                  {product}
  99.      bool CMSParallelInitialMarkEnabled             = true                                {product}
  100.      bool CMSParallelRemarkEnabled                  = true                                {product}
  101.      bool CMSParallelSurvivorRemarkEnabled          = true                                {product}
  102.     uintx CMSPrecleanDenominator                    = 3                                   {product}
  103.     uintx CMSPrecleanIter                           = 3                                   {product}
  104.     uintx CMSPrecleanNumerator                      = 2                                   {product}
  105.      bool CMSPrecleanRefLists1                      = true                                {product}
  106.      bool CMSPrecleanRefLists2                      = false                               {product}
  107.      bool CMSPrecleanSurvivors1                     = false                               {product}
  108.      bool CMSPrecleanSurvivors2                     = true                                {product}
  109.     uintx CMSPrecleanThreshold                      = 1000                                {product}
  110.      bool CMSPrecleaningEnabled                     = true                                {product}
  111.      bool CMSPrintChunksInDump                      = false                               {product}
  112.      bool CMSPrintEdenSurvivorChunks                = false                               {product}
  113.      bool CMSPrintObjectsInDump                     = false                               {product}
  114.     uintx CMSRemarkVerifyVariant                    = 1                                   {product}
  115.      bool CMSReplenishIntermediate                  = true                                {product}
  116.     uintx CMSRescanMultiple                         = 32                                  {product}
  117.     uintx CMSSamplingGrain                          = 16384                               {product}
  118.      bool CMSScavengeBeforeRemark                   = false                               {product}
  119.     uintx CMSScheduleRemarkEdenPenetration          = 50                                  {product}
  120.     uintx CMSScheduleRemarkEdenSizeThreshold        = 2097152                             {product}
  121.     uintx CMSScheduleRemarkSamplingRatio            = 5                                   {product}
  122.    double CMSSmallCoalSurplusPercent                = 1.050000                            {product}
  123.    double CMSSmallSplitSurplusPercent               = 1.100000                            {product}
  124.      bool CMSSplitIndexedFreeListBlocks             = true                                {product}
  125.      intx CMSTriggerInterval                        = -1                                  {manageable}
  126.     uintx CMSTriggerRatio                           = 80                                  {product}
  127.      intx CMSWaitDuration                           = 2000                                {manageable}
  128.     uintx CMSWorkQueueDrainThreshold                = 10                                  {product}
  129.      bool CMSYield                                  = true                                {product}
  130.     uintx CMSYieldSleepCount                        = 0                                   {product}
  131.     uintx CMSYoungGenPerWorker                      = 67108864                            {pd product}
  132.     uintx CMS_FLSPadding                            = 1                                   {product}
  133.     uintx CMS_FLSWeight                             = 75                                  {product}
  134.     uintx CMS_SweepPadding                          = 1                                   {product}
  135.     uintx CMS_SweepTimerThresholdMillis             = 10                                  {product}
  136.     uintx CMS_SweepWeight                           = 75                                  {product}
  137.      bool CheckEndorsedAndExtDirs                   = false                               {product}
  138.      bool CheckJNICalls                             = false                               {product}
  139.      bool ClassUnloading                            = true                                {product}
  140.      bool ClassUnloadingWithConcurrentMark          = true                                {product}
  141.      intx ClearFPUAtPark                            = 0                                   {product}
  142.      bool ClipInlining                              = true                                {product}
  143.     uintx CodeCacheExpansionSize                    = 65536                               {pd product}
  144.     uintx CodeCacheMinimumFreeSpace                 = 512000                              {product}
  145.      bool CollectGen0First                          = false                               {product}
  146.      bool CompactFields                             = true                                {product}
  147.      intx CompilationPolicyChoice                   = 3                                   {product}
  148. ccstrlist CompileCommand                            =                                     {product}
  149.     ccstr CompileCommandFile                        =                                     {product}
  150. ccstrlist CompileOnly                               =                                     {product}
  151.      intx CompileThreshold                          = 10000                               {pd product}
  152.      bool CompilerThreadHintNoPreempt               = true                                {product}
  153.      intx CompilerThreadPriority                    = -1                                  {product}
  154.      intx CompilerThreadStackSize                   = 0                                   {pd product}
  155.     uintx CompressedClassSpaceSize                  = 1073741824                          {product}
  156.     uintx ConcGCThreads                             = 0                                   {product}
  157.      intx ConditionalMoveLimit                      = 3                                   {C2 pd product}
  158.      intx ContendedPaddingWidth                     = 128                                 {product}
  159.      bool ConvertSleepToYield                       = true                                {pd product}
  160.      bool ConvertYieldToSleep                       = false                               {product}
  161.      bool CreateMinidumpOnCrash                     = false                               {product}
  162.      bool CriticalJNINatives                        = true                                {product}
  163.      bool DTraceAllocProbes                         = false                               {product}
  164.      bool DTraceMethodProbes                        = false                               {product}
  165.      bool DTraceMonitorProbes                       = false                               {product}
  166.      bool Debugging                                 = false                               {product}
  167.     uintx DefaultMaxRAMFraction                     = 4                                   {product}
  168.      intx DefaultThreadPriority                     = -1                                  {product}
  169.      intx DeferPollingPageLoopCount                 = -1                                  {product}
  170.      intx DeferThrSuspendLoopCount                  = 4000                                {product}
  171.      bool DeoptimizeRandom                          = false                               {product}
  172.      bool DisableAttachMechanism                    = false                               {product}
  173.      bool DisableExplicitGC                         = false                               {product}
  174.      bool DisplayVMOutputToStderr                   = false                               {product}
  175.      bool DisplayVMOutputToStdout                   = false                               {product}
  176.      bool DoEscapeAnalysis                          = true                                {C2 product}
  177.      bool DontCompileHugeMethods                    = true                                {product}
  178.      bool DontYieldALot                             = false                               {pd product}
  179.     ccstr DumpLoadedClassList                       =                                     {product}
  180.      bool DumpReplayDataOnError                     = true                                {product}
  181.      bool DumpSharedSpaces                          = false                               {product}
  182.      bool EagerXrunInit                             = false                               {product}
  183.      intx EliminateAllocationArraySizeLimit         = 64                                  {C2 product}
  184.      bool EliminateAllocations                      = true                                {C2 product}
  185.      bool EliminateAutoBox                          = true                                {C2 product}
  186.      bool EliminateLocks                            = true                                {C2 product}
  187.      bool EliminateNestedLocks                      = true                                {C2 product}
  188.      intx EmitSync                                  = 0                                   {product}
  189.      bool EnableContended                           = true                                {product}
  190.      bool EnableSharedLookupCache                   = true                                {product}
  191.      bool EnableTracing                             = false                               {product}
  192.     uintx ErgoHeapSizeLimit                         = 0                                   {product}
  193.     ccstr ErrorFile                                 =                                     {product}
  194.     ccstr ErrorReportServer                         =                                     {product}
  195.    double EscapeAnalysisTimeout                     = 20.000000                           {C2 product}
  196.      bool EstimateArgEscape                         = true                                {product}
  197.      bool ExplicitGCInvokesConcurrent               = false                               {product}
  198.      bool ExplicitGCInvokesConcurrentAndUnloadsClasses  = false                               {product}
  199.      bool ExtendedDTraceProbes                      = false                               {product}
  200.     ccstr ExtraSharedClassListFile                  =                                     {product}
  201.      bool FLSAlwaysCoalesceLarge                    = false                               {product}
  202.     uintx FLSCoalescePolicy                         = 2                                   {product}
  203.    double FLSLargestBlockCoalesceProximity          = 0.990000                            {product}
  204.      bool FailOverToOldVerifier                     = true                                {product}
  205.      bool FastTLABRefill                            = true                                {product}
  206.      intx FenceInstruction                          = 0                                   {ARCH product}
  207.      intx FieldsAllocationStyle                     = 1                                   {product}
  208.      bool FilterSpuriousWakeups                     = true                                {product}
  209.     ccstr FlightRecorderOptions                     =                                     {product}
  210.      bool ForceNUMA                                 = false                               {product}
  211.      bool ForceTimeHighResolution                   = false                               {product}
  212.      intx FreqInlineSize                            = 325                                 {pd product}
  213.    double G1ConcMarkStepDurationMillis              = 10.000000                           {product}
  214.     uintx G1ConcRSHotCardLimit                      = 4                                   {product}
  215.     uintx G1ConcRSLogCacheSize                      = 10                                  {product}
  216.      intx G1ConcRefinementGreenZone                 = 0                                   {product}
  217.      intx G1ConcRefinementRedZone                   = 0                                   {product}
  218.      intx G1ConcRefinementServiceIntervalMillis     = 300                                 {product}
  219.     uintx G1ConcRefinementThreads                   = 0                                   {product}
  220.      intx G1ConcRefinementThresholdStep             = 0                                   {product}
  221.      intx G1ConcRefinementYellowZone                = 0                                   {product}
  222.     uintx G1ConfidencePercent                       = 50                                  {product}
  223.     uintx G1HeapRegionSize                          = 0                                   {product}
  224.     uintx G1HeapWastePercent                        = 5                                   {product}
  225.     uintx G1MixedGCCountTarget                      = 8                                   {product}
  226.      intx G1RSetRegionEntries                       = 0                                   {product}
  227.     uintx G1RSetScanBlockSize                       = 64                                  {product}
  228.      intx G1RSetSparseRegionEntries                 = 0                                   {product}
  229.      intx G1RSetUpdatingPauseTimePercent            = 10                                  {product}
  230.      intx G1RefProcDrainInterval                    = 10                                  {product}
  231.     uintx G1ReservePercent                          = 10                                  {product}
  232.     uintx G1SATBBufferEnqueueingThresholdPercent    = 60                                  {product}
  233.      intx G1SATBBufferSize                          = 1024                                {product}
  234.      intx G1UpdateBufferSize                        = 256                                 {product}
  235.      bool G1UseAdaptiveConcRefinement               = true                                {product}
  236.     uintx GCDrainStackTargetSize                    = 64                                  {product}
  237.     uintx GCHeapFreeLimit                           = 2                                   {product}
  238.     uintx GCLockerEdenExpansionPercent              = 5                                   {product}
  239.      bool GCLockerInvokesConcurrent                 = false                               {product}
  240.     uintx GCLogFileSize                             = 8192                                {product}
  241.     uintx GCPauseIntervalMillis                     = 0                                   {product}
  242.     uintx GCTaskTimeStampEntries                    = 200                                 {product}
  243.     uintx GCTimeLimit                               = 98                                  {product}
  244.     uintx GCTimeRatio                               = 99                                  {product}
  245.     uintx HeapBaseMinAddress                        = 2147483648                          {pd product}
  246.      bool HeapDumpAfterFullGC                       = false                               {manageable}
  247.      bool HeapDumpBeforeFullGC                      = false                               {manageable}
  248.      bool HeapDumpOnOutOfMemoryError                = false                               {manageable}
  249.     ccstr HeapDumpPath                              =                                     {manageable}
  250.     uintx HeapFirstMaximumCompactionCount           = 3                                   {product}
  251.     uintx HeapMaximumCompactionInterval             = 20                                  {product}
  252.     uintx HeapSizePerGCThread                       = 87241520                            {product}
  253.      bool IgnoreEmptyClassPaths                     = false                               {product}
  254.      bool IgnoreUnrecognizedVMOptions               = false                               {product}
  255.     uintx IncreaseFirstTierCompileThresholdAt       = 50                                  {product}
  256.      bool IncrementalInline                         = true                                {C2 product}
  257.     uintx InitialBootClassLoaderMetaspaceSize       = 4194304                             {product}
  258.     uintx InitialCodeCacheSize                      = 2555904                             {pd product}
  259.     uintx InitialHeapSize                          := 266338304                           {product}
  260.     uintx InitialRAMFraction                        = 64                                  {product}
  261.     uintx InitialSurvivorRatio                      = 8                                   {product}
  262.     uintx InitialTenuringThreshold                  = 7                                   {product}
  263.     uintx InitiatingHeapOccupancyPercent            = 45                                  {product}
  264.      bool Inline                                    = true                                {product}
  265.     ccstr InlineDataFile                            =                                     {product}
  266.      intx InlineSmallCode                           = 2000                                {pd product}
  267.      bool InlineSynchronizedMethods                 = true                                {C1 product}
  268.      bool InsertMemBarAfterArraycopy                = true                                {C2 product}
  269.      intx InteriorEntryAlignment                    = 16                                  {C2 pd product}
  270.      intx InterpreterProfilePercentage              = 33                                  {product}
  271.      bool JNIDetachReleasesMonitors                 = true                                {product}
  272.      bool JavaMonitorsInStackTrace                  = true                                {product}
  273.      intx JavaPriority10_To_OSPriority              = -1                                  {product}
  274.      intx JavaPriority1_To_OSPriority               = -1                                  {product}
  275.      intx JavaPriority2_To_OSPriority               = -1                                  {product}
  276.      intx JavaPriority3_To_OSPriority               = -1                                  {product}
  277.      intx JavaPriority4_To_OSPriority               = -1                                  {product}
  278.      intx JavaPriority5_To_OSPriority               = -1                                  {product}
  279.      intx JavaPriority6_To_OSPriority               = -1                                  {product}
  280.      intx JavaPriority7_To_OSPriority               = -1                                  {product}
  281.      intx JavaPriority8_To_OSPriority               = -1                                  {product}
  282.      intx JavaPriority9_To_OSPriority               = -1                                  {product}
  283.      bool LIRFillDelaySlots                         = false                               {C1 pd product}
  284.     uintx LargePageHeapSizeThreshold                = 134217728                           {product}
  285.     uintx LargePageSizeInBytes                      = 0                                   {product}
  286.      bool LazyBootClassLoader                       = true                                {product}
  287.      intx LiveNodeCountInliningCutoff               = 40000                               {C2 product}
  288.      bool LogCommercialFeatures                     = false                               {product}
  289.      intx LoopMaxUnroll                             = 16                                  {C2 product}
  290.      intx LoopOptsCount                             = 43                                  {C2 product}
  291.      intx LoopUnrollLimit                           = 60                                  {C2 pd product}
  292.      intx LoopUnrollMin                             = 4                                   {C2 product}
  293.      bool LoopUnswitching                           = true                                {C2 product}
  294.      bool ManagementServer                          = false                               {product}
  295.     uintx MarkStackSize                             = 4194304                             {product}
  296.     uintx MarkStackSizeMax                          = 536870912                           {product}
  297.     uintx MarkSweepAlwaysCompactCount               = 4                                   {product}
  298.     uintx MarkSweepDeadRatio                        = 1                                   {product}
  299.      intx MaxBCEAEstimateLevel                      = 5                                   {product}
  300.      intx MaxBCEAEstimateSize                       = 150                                 {product}
  301.     uintx MaxDirectMemorySize                       = 0                                   {product}
  302.      bool MaxFDLimit                                = true                                {product}
  303.     uintx MaxGCMinorPauseMillis                     = 4294967295                          {product}
  304.     uintx MaxGCPauseMillis                          = 4294967295                          {product}
  305.     uintx MaxHeapFreeRatio                          = 100                                 {manageable}
  306.     uintx MaxHeapSize                              := 4261412864                          {product}
  307.      intx MaxInlineLevel                            = 9                                   {product}
  308.      intx MaxInlineSize                             = 35                                  {product}
  309.      intx MaxJNILocalCapacity                       = 65536                               {product}
  310.      intx MaxJavaStackTraceDepth                    = 1024                                {product}
  311.      intx MaxJumpTableSize                          = 65000                               {C2 product}
  312.      intx MaxJumpTableSparseness                    = 5                                   {C2 product}
  313.      intx MaxLabelRootDepth                         = 1100                                {C2 product}
  314.      intx MaxLoopPad                                = 11                                  {C2 product}
  315.     uintx MaxMetaspaceExpansion                     = 5451776                             {product}
  316.     uintx MaxMetaspaceFreeRatio                     = 70                                  {product}
  317.     uintx MaxMetaspaceSize                          = 4294901760                          {product}
  318.     uintx MaxNewSize                               := 1420296192                          {product}
  319.      intx MaxNodeLimit                              = 75000                               {C2 product}
  320.  uint64_t MaxRAM                                    = 0                                   {pd product}
  321.     uintx MaxRAMFraction                            = 4                                   {product}
  322.      intx MaxRecursiveInlineLevel                   = 1                                   {product}
  323.     uintx MaxTenuringThreshold                      = 15                                  {product}
  324.      intx MaxTrivialSize                            = 6                                   {product}
  325.      intx MaxVectorSize                             = 32                                  {C2 product}
  326.     uintx MetaspaceSize                             = 21807104                            {pd product}
  327.      bool MethodFlushing                            = true                                {product}
  328.     uintx MinHeapDeltaBytes                        := 524288                              {product}
  329.     uintx MinHeapFreeRatio                          = 0                                   {manageable}
  330.      intx MinInliningThreshold                      = 250                                 {product}
  331.      intx MinJumpTableSize                          = 10                                  {C2 pd product}
  332.     uintx MinMetaspaceExpansion                     = 339968                              {product}
  333.     uintx MinMetaspaceFreeRatio                     = 40                                  {product}
  334.     uintx MinRAMFraction                            = 2                                   {product}
  335.     uintx MinSurvivorRatio                          = 3                                   {product}
  336.     uintx MinTLABSize                               = 2048                                {product}
  337.      intx MonitorBound                              = 0                                   {product}
  338.      bool MonitorInUseLists                         = false                               {product}
  339.      intx MultiArrayExpandLimit                     = 6                                   {C2 product}
  340.      bool MustCallLoadClassInternal                 = false                               {product}
  341.     uintx NUMAChunkResizeWeight                     = 20                                  {product}
  342.     uintx NUMAInterleaveGranularity                 = 2097152                             {product}
  343.     uintx NUMAPageScanRate                          = 256                                 {product}
  344.     uintx NUMASpaceResizeRate                       = 1073741824                          {product}
  345.      bool NUMAStats                                 = false                               {product}
  346.     ccstr NativeMemoryTracking                      = off                                 {product}
  347.      bool NeedsDeoptSuspend                         = false                               {pd product}
  348.      bool NeverActAsServerClassMachine              = false                               {pd product}
  349.      bool NeverTenure                               = false                               {product}
  350.     uintx NewRatio                                  = 2                                   {product}
  351.     uintx NewSize                                  := 88604672                            {product}
  352.     uintx NewSizeThreadIncrease                     = 5320                                {pd product}
  353.      intx NmethodSweepActivity                      = 10                                  {product}
  354.      intx NmethodSweepCheckInterval                 = 5                                   {product}
  355.      intx NmethodSweepFraction                      = 16                                  {product}
  356.      intx NodeLimitFudgeFactor                      = 2000                                {C2 product}
  357.     uintx NumberOfGCLogFiles                        = 0                                   {product}
  358.      intx NumberOfLoopInstrToAlign                  = 4                                   {C2 product}
  359.      intx ObjectAlignmentInBytes                    = 8                                   {lp64_product}
  360.     uintx OldPLABSize                               = 1024                                {product}
  361.     uintx OldPLABWeight                             = 50                                  {product}
  362.     uintx OldSize                                  := 177733632                           {product}
  363.      bool OmitStackTraceInFastThrow                 = true                                {product}
  364. ccstrlist OnError                                   =                                     {product}
  365. ccstrlist OnOutOfMemoryError                        =                                     {product}
  366.      intx OnStackReplacePercentage                  = 140                                 {pd product}
  367.      bool OptimizeFill                              = true                                {C2 product}
  368.      bool OptimizePtrCompare                        = true                                {C2 product}
  369.      bool OptimizeStringConcat                      = true                                {C2 product}
  370.      bool OptoBundling                              = false                               {C2 pd product}
  371.      intx OptoLoopAlignment                         = 16                                  {pd product}
  372.      bool OptoScheduling                            = false                               {C2 pd product}
  373.     uintx PLABWeight                                = 75                                  {product}
  374.      bool PSChunkLargeArrays                        = true                                {product}
  375.      intx ParGCArrayScanChunk                       = 50                                  {product}
  376.     uintx ParGCDesiredObjsFromOverflowList          = 20                                  {product}
  377.      bool ParGCTrimOverflow                         = true                                {product}
  378.      bool ParGCUseLocalOverflow                     = false                               {product}
  379.     uintx ParallelGCBufferWastePct                  = 10                                  {product}
  380.     uintx ParallelGCThreads                         = 10                                  {product}
  381.      bool ParallelGCVerbose                         = false                               {product}
  382.     uintx ParallelOldDeadWoodLimiterMean            = 50                                  {product}
  383.     uintx ParallelOldDeadWoodLimiterStdDev          = 80                                  {product}
  384.      bool ParallelRefProcBalancingEnabled           = true                                {product}
  385.      bool ParallelRefProcEnabled                    = false                               {product}
  386.      bool PartialPeelAtUnsignedTests                = true                                {C2 product}
  387.      bool PartialPeelLoop                           = true                                {C2 product}
  388.      intx PartialPeelNewPhiDelta                    = 0                                   {C2 product}
  389.     uintx PausePadding                              = 1                                   {product}
  390.      intx PerBytecodeRecompilationCutoff            = 200                                 {product}
  391.      intx PerBytecodeTrapLimit                      = 4                                   {product}
  392.      intx PerMethodRecompilationCutoff              = 400                                 {product}
  393.      intx PerMethodTrapLimit                        = 100                                 {product}
  394.      bool PerfAllowAtExitRegistration               = false                               {product}
  395.      bool PerfBypassFileSystemCheck                 = false                               {product}
  396.      intx PerfDataMemorySize                        = 32768                               {product}
  397.      intx PerfDataSamplingInterval                  = 50                                  {product}
  398.     ccstr PerfDataSaveFile                          =                                     {product}
  399.      bool PerfDataSaveToFile                        = false                               {product}
  400.      bool PerfDisableSharedMem                      = false                               {product}
  401.      intx PerfMaxStringConstLength                  = 1024                                {product}
  402.      intx PreInflateSpin                            = 10                                  {pd product}
  403.      bool PreferInterpreterNativeStubs              = false                               {pd product}
  404.      intx PrefetchCopyIntervalInBytes               = 576                                 {product}
  405.      intx PrefetchFieldsAhead                       = 1                                   {product}
  406.      intx PrefetchScanIntervalInBytes               = 576                                 {product}
  407.      bool PreserveAllAnnotations                    = false                               {product}
  408.     uintx PretenureSizeThreshold                    = 0                                   {product}
  409.      bool PrintAdaptiveSizePolicy                   = false                               {product}
  410.      bool PrintCMSInitiationStatistics              = false                               {product}
  411.      intx PrintCMSStatistics                        = 0                                   {product}
  412.      bool PrintClassHistogram                       = false                               {manageable}
  413.      bool PrintClassHistogramAfterFullGC            = false                               {manageable}
  414.      bool PrintClassHistogramBeforeFullGC           = false                               {manageable}
  415.      bool PrintCodeCache                            = false                               {product}
  416.      bool PrintCodeCacheOnCompilation               = false                               {product}
  417.      bool PrintCommandLineFlags                     = false                               {product}
  418.      bool PrintCompilation                          = false                               {product}
  419.      bool PrintConcurrentLocks                      = false                               {manageable}
  420.      intx PrintFLSCensus                            = 0                                   {product}
  421.      intx PrintFLSStatistics                        = 0                                   {product}
  422.      bool PrintFlagsFinal                          := true                                {product}
  423.      bool PrintFlagsInitial                         = false                               {product}
  424.      bool PrintGC                                   = false                               {manageable}
  425.      bool PrintGCApplicationConcurrentTime          = false                               {product}
  426.      bool PrintGCApplicationStoppedTime             = false                               {product}
  427.      bool PrintGCCause                              = true                                {product}
  428.      bool PrintGCDateStamps                         = false                               {manageable}
  429.      bool PrintGCDetails                            = false                               {manageable}
  430.      bool PrintGCID                                 = false                               {manageable}
  431.      bool PrintGCTaskTimeStamps                     = false                               {product}
  432.      bool PrintGCTimeStamps                         = false                               {manageable}
  433.      bool PrintHeapAtGC                             = false                               {product rw}
  434.      bool PrintHeapAtGCExtended                     = false                               {product rw}
  435.      bool PrintHeapAtSIGBREAK                       = true                                {product}
  436.      bool PrintJNIGCStalls                          = false                               {product}
  437.      bool PrintJNIResolving                         = false                               {product}
  438.      bool PrintOldPLAB                              = false                               {product}
  439.      bool PrintOopAddress                           = false                               {product}
  440.      bool PrintPLAB                                 = false                               {product}
  441.      bool PrintParallelOldGCPhaseTimes              = false                               {product}
  442.      bool PrintPromotionFailure                     = false                               {product}
  443.      bool PrintReferenceGC                          = false                               {product}
  444.      bool PrintSafepointStatistics                  = false                               {product}
  445.      intx PrintSafepointStatisticsCount             = 300                                 {product}
  446.      intx PrintSafepointStatisticsTimeout           = -1                                  {product}
  447.      bool PrintSharedArchiveAndExit                 = false                               {product}
  448.      bool PrintSharedDictionary                     = false                               {product}
  449.      bool PrintSharedSpaces                         = false                               {product}
  450.      bool PrintStringDeduplicationStatistics        = false                               {product}
  451.      bool PrintStringTableStatistics                = false                               {product}
  452.      bool PrintTLAB                                 = false                               {product}
  453.      bool PrintTenuringDistribution                 = false                               {product}
  454.      bool PrintTieredEvents                         = false                               {product}
  455.      bool PrintVMOptions                            = false                               {product}
  456.      bool PrintVMQWaitTime                          = false                               {product}
  457.      bool PrintWarnings                             = true                                {product}
  458.     uintx ProcessDistributionStride                 = 4                                   {product}
  459.      bool ProfileInterpreter                        = true                                {pd product}
  460.      bool ProfileIntervals                          = false                               {product}
  461.      intx ProfileIntervalsTicks                     = 100                                 {product}
  462.      intx ProfileMaturityPercentage                 = 20                                  {product}
  463.      bool ProfileVM                                 = false                               {product}
  464.      bool ProfilerPrintByteCodeStatistics           = false                               {product}
  465.      bool ProfilerRecordPC                          = false                               {product}
  466.     uintx PromotedPadding                           = 3                                   {product}
  467.     uintx QueuedAllocationWarningCount              = 0                                   {product}
  468.     uintx RTMRetryCount                             = 5                                   {ARCH product}
  469.      bool RangeCheckElimination                     = true                                {product}
  470.      intx ReadPrefetchInstr                         = 0                                   {ARCH product}
  471.      bool ReassociateInvariants                     = true                                {C2 product}
  472.      bool ReduceBulkZeroing                         = true                                {C2 product}
  473.      bool ReduceFieldZeroing                        = true                                {C2 product}
  474.      bool ReduceInitialCardMarks                    = true                                {C2 product}
  475.      bool ReduceSignalUsage                         = false                               {product}
  476.      intx RefDiscoveryPolicy                        = 0                                   {product}
  477.      bool ReflectionWrapResolutionErrors            = true                                {product}
  478.      bool RegisterFinalizersAtInit                  = true                                {product}
  479.      bool RelaxAccessControlCheck                   = false                               {product}
  480.     ccstr ReplayDataFile                            =                                     {product}
  481.      bool RequireSharedSpaces                       = false                               {product}
  482.     uintx ReservedCodeCacheSize                     = 251658240                           {pd product}
  483.      bool ResizeOldPLAB                             = true                                {product}
  484.      bool ResizePLAB                                = true                                {product}
  485.      bool ResizeTLAB                                = true                                {pd product}
  486.      bool RestoreMXCSROnJNICalls                    = false                               {product}
  487.      bool RestrictContended                         = true                                {product}
  488.      bool RewriteBytecodes                          = true                                {pd product}
  489.      bool RewriteFrequentPairs                      = true                                {pd product}
  490.      intx SafepointPollOffset                       = 256                                 {C1 pd product}
  491.      intx SafepointSpinBeforeYield                  = 2000                                {product}
  492.      bool SafepointTimeout                          = false                               {product}
  493.      intx SafepointTimeoutDelay                     = 10000                               {product}
  494.      bool ScavengeBeforeFullGC                      = true                                {product}
  495.      intx SelfDestructTimer                         = 0                                   {product}
  496.     uintx SharedBaseAddress                         = 0                                   {product}
  497.     ccstr SharedClassListFile                       =                                     {product}
  498.     uintx SharedMiscCodeSize                        = 122880                              {product}
  499.     uintx SharedMiscDataSize                        = 4194304                             {product}
  500.     uintx SharedReadOnlySize                        = 16777216                            {product}
  501.     uintx SharedReadWriteSize                       = 16777216                            {product}
  502.      bool ShowMessageBoxOnError                     = false                               {product}
  503.      intx SoftRefLRUPolicyMSPerMB                   = 1000                                {product}
  504.      bool SpecialEncodeISOArray                     = true                                {C2 product}
  505.      bool SplitIfBlocks                             = true                                {C2 product}
  506.      intx StackRedPages                             = 1                                   {pd product}
  507.      intx StackShadowPages                          = 6                                   {pd product}
  508.      bool StackTraceInThrowable                     = true                                {product}
  509.      intx StackYellowPages                          = 3                                   {pd product}
  510.      bool StartAttachListener                       = false                               {product}
  511.      intx StarvationMonitorInterval                 = 200                                 {product}
  512.      bool StressLdcRewrite                          = false                               {product}
  513.     uintx StringDeduplicationAgeThreshold           = 3                                   {product}
  514.     uintx StringTableSize                           = 60013                               {product}
  515.      bool SuppressFatalErrorMessage                 = false                               {product}
  516.     uintx SurvivorPadding                           = 3                                   {product}
  517.     uintx SurvivorRatio                             = 8                                   {product}
  518.      intx SuspendRetryCount                         = 50                                  {product}
  519.      intx SuspendRetryDelay                         = 5                                   {product}
  520.      intx SyncFlags                                 = 0                                   {product}
  521.     ccstr SyncKnobs                                 =                                     {product}
  522.      intx SyncVerbose                               = 0                                   {product}
  523.     uintx TLABAllocationWeight                      = 35                                  {product}
  524.     uintx TLABRefillWasteFraction                   = 64                                  {product}
  525.     uintx TLABSize                                  = 0                                   {product}
  526.      bool TLABStats                                 = true                                {product}
  527.     uintx TLABWasteIncrement                        = 4                                   {product}
  528.     uintx TLABWasteTargetPercent                    = 1                                   {product}
  529.     uintx TargetPLABWastePct                        = 10                                  {product}
  530.     uintx TargetSurvivorRatio                       = 50                                  {product}
  531.     uintx TenuredGenerationSizeIncrement            = 20                                  {product}
  532.     uintx TenuredGenerationSizeSupplement           = 80                                  {product}
  533.     uintx TenuredGenerationSizeSupplementDecay      = 2                                   {product}
  534.      intx ThreadPriorityPolicy                      = 0                                   {product}
  535.      bool ThreadPriorityVerbose                     = false                               {product}
  536.     uintx ThreadSafetyMargin                        = 52428800                            {product}
  537.      intx ThreadStackSize                           = 0                                   {pd product}
  538.     uintx ThresholdTolerance                        = 10                                  {product}
  539.      intx Tier0BackedgeNotifyFreqLog                = 10                                  {product}
  540.      intx Tier0InvokeNotifyFreqLog                  = 7                                   {product}
  541.      intx Tier0ProfilingStartPercentage             = 200                                 {product}
  542.      intx Tier23InlineeNotifyFreqLog                = 20                                  {product}
  543.      intx Tier2BackEdgeThreshold                    = 0                                   {product}
  544.      intx Tier2BackedgeNotifyFreqLog                = 14                                  {product}
  545.      intx Tier2CompileThreshold                     = 0                                   {product}
  546.      intx Tier2InvokeNotifyFreqLog                  = 11                                  {product}
  547.      intx Tier3BackEdgeThreshold                    = 60000                               {product}
  548.      intx Tier3BackedgeNotifyFreqLog                = 13                                  {product}
  549.      intx Tier3CompileThreshold                     = 2000                                {product}
  550.      intx Tier3DelayOff                             = 2                                   {product}
  551.      intx Tier3DelayOn                              = 5                                   {product}
  552.      intx Tier3InvocationThreshold                  = 200                                 {product}
  553.      intx Tier3InvokeNotifyFreqLog                  = 10                                  {product}
  554.      intx Tier3LoadFeedback                         = 5                                   {product}
  555.      intx Tier3MinInvocationThreshold               = 100                                 {product}
  556.      intx Tier4BackEdgeThreshold                    = 40000                               {product}
  557.      intx Tier4CompileThreshold                     = 15000                               {product}
  558.      intx Tier4InvocationThreshold                  = 5000                                {product}
  559.      intx Tier4LoadFeedback                         = 3                                   {product}
  560.      intx Tier4MinInvocationThreshold               = 600                                 {product}
  561.      bool TieredCompilation                         = true                                {pd product}
  562.      intx TieredCompileTaskTimeout                  = 50                                  {product}
  563.      intx TieredRateUpdateMaxTime                   = 25                                  {product}
  564.      intx TieredRateUpdateMinTime                   = 1                                   {product}
  565.      intx TieredStopAtLevel                         = 4                                   {product}
  566.      bool TimeLinearScan                            = false                               {C1 product}
  567.      bool TraceBiasedLocking                        = false                               {product}
  568.      bool TraceClassLoading                         = false                               {product rw}
  569.      bool TraceClassLoadingPreorder                 = false                               {product}
  570.      bool TraceClassPaths                           = false                               {product}
  571.      bool TraceClassResolution                      = false                               {product}
  572.      bool TraceClassUnloading                       = false                               {product rw}
  573.      bool TraceDynamicGCThreads                     = false                               {product}
  574.      bool TraceGen0Time                             = false                               {product}
  575.      bool TraceGen1Time                             = false                               {product}
  576.     ccstr TraceJVMTI                                =                                     {product}
  577.      bool TraceLoaderConstraints                    = false                               {product rw}
  578.      bool TraceMetadataHumongousAllocation          = false                               {product}
  579.      bool TraceMonitorInflation                     = false                               {product}
  580.      bool TraceParallelOldGCTasks                   = false                               {product}
  581.      intx TraceRedefineClasses                      = 0                                   {product}
  582.      bool TraceSafepointCleanupTime                 = false                               {product}
  583.      bool TraceSharedLookupCache                    = false                               {product}
  584.      bool TraceSuspendWaitFailures                  = false                               {product}
  585.      intx TrackedInitializationLimit                = 50                                  {C2 product}
  586.      bool TransmitErrorReport                       = false                               {product}
  587.      bool TrapBasedNullChecks                       = false                               {pd product}
  588.      bool TrapBasedRangeChecks                      = false                               {C2 pd product}
  589.      intx TypeProfileArgsLimit                      = 2                                   {product}
  590.     uintx TypeProfileLevel                          = 111                                 {pd product}
  591.      intx TypeProfileMajorReceiverPercent           = 90                                  {C2 product}
  592.      intx TypeProfileParmsLimit                     = 2                                   {product}
  593.      intx TypeProfileWidth                          = 2                                   {product}
  594.      intx UnguardOnExecutionViolation               = 0                                   {product}
  595.      bool UnlinkSymbolsALot                         = false                               {product}
  596.      bool Use486InstrsOnly                          = false                               {ARCH product}
  597.      bool UseAES                                    = true                                {product}
  598.      bool UseAESIntrinsics                          = true                                {product}
  599.      intx UseAVX                                    = 2                                   {ARCH product}
  600.      bool UseAdaptiveGCBoundary                     = false                               {product}
  601.      bool UseAdaptiveGenerationSizePolicyAtMajorCollection  = true                                {product}
  602.      bool UseAdaptiveGenerationSizePolicyAtMinorCollection  = true                                {product}
  603.      bool UseAdaptiveNUMAChunkSizing                = true                                {product}
  604.      bool UseAdaptiveSizeDecayMajorGCCost           = true                                {product}
  605.      bool UseAdaptiveSizePolicy                     = true                                {product}
  606.      bool UseAdaptiveSizePolicyFootprintGoal        = true                                {product}
  607.      bool UseAdaptiveSizePolicyWithSystemGC         = false                               {product}
  608.      bool UseAddressNop                             = true                                {ARCH product}
  609.      bool UseAltSigs                                = false                               {product}
  610.      bool UseAutoGCSelectPolicy                     = false                               {product}
  611.      bool UseBMI1Instructions                       = true                                {ARCH product}
  612.      bool UseBMI2Instructions                       = true                                {ARCH product}
  613.      bool UseBiasedLocking                          = true                                {product}
  614.      bool UseBimorphicInlining                      = true                                {C2 product}
  615.      bool UseBoundThreads                           = true                                {product}
  616.      bool UseCLMUL                                  = true                                {ARCH product}
  617.      bool UseCMSBestFit                             = true                                {product}
  618.      bool UseCMSCollectionPassing                   = true                                {product}
  619.      bool UseCMSCompactAtFullCollection             = true                                {product}
  620.      bool UseCMSInitiatingOccupancyOnly             = false                               {product}
  621.      bool UseCRC32Intrinsics                        = true                                {product}
  622.      bool UseCodeCacheFlushing                      = true                                {product}
  623.      bool UseCompiler                               = true                                {product}
  624.      bool UseCompilerSafepoints                     = true                                {product}
  625.      bool UseCompressedClassPointers               := true                                {lp64_product}
  626.      bool UseCompressedOops                        := true                                {lp64_product}
  627.      bool UseConcMarkSweepGC                        = false                               {product}
  628.      bool UseCondCardMark                           = false                               {C2 product}
  629.      bool UseCountLeadingZerosInstruction           = true                                {ARCH product}
  630.      bool UseCountTrailingZerosInstruction          = true                                {ARCH product}
  631.      bool UseCounterDecay                           = true                                {product}
  632.      bool UseDivMod                                 = true                                {C2 product}
  633.      bool UseDynamicNumberOfGCThreads               = false                               {product}
  634.      bool UseFPUForSpilling                         = true                                {C2 product}
  635.      bool UseFastAccessorMethods                    = false                               {product}
  636.      bool UseFastEmptyMethods                       = false                               {product}
  637.      bool UseFastJNIAccessors                       = true                                {product}
  638.      bool UseFastStosb                              = true                                {ARCH product}
  639.      bool UseG1GC                                   = false                               {product}
  640.      bool UseGCLogFileRotation                      = false                               {product}
  641.      bool UseGCOverheadLimit                        = true                                {product}
  642.      bool UseGCTaskAffinity                         = false                               {product}
  643.      bool UseHeavyMonitors                          = false                               {product}
  644.      bool UseInlineCaches                           = true                                {product}
  645.      bool UseInterpreter                            = true                                {product}
  646.      bool UseJumpTables                             = true                                {C2 product}
  647.      bool UseLWPSynchronization                     = true                                {product}
  648.      bool UseLargePages                             = false                               {pd product}
  649.      bool UseLargePagesInMetaspace                  = false                               {product}
  650.      bool UseLargePagesIndividualAllocation        := false                               {pd product}
  651.      bool UseLockedTracing                          = false                               {product}
  652.      bool UseLoopCounter                            = true                                {product}
  653.      bool UseLoopInvariantCodeMotion                = true                                {C1 product}
  654.      bool UseLoopPredicate                          = true                                {C2 product}
  655.      bool UseMathExactIntrinsics                    = true                                {C2 product}
  656.      bool UseMaximumCompactionOnSystemGC            = true                                {product}
  657.      bool UseMembar                                 = false                               {pd product}
  658.      bool UseMultiplyToLenIntrinsic                 = true                                {C2 product}
  659.      bool UseNUMA                                   = false                               {product}
  660.      bool UseNUMAInterleaving                       = false                               {product}
  661.      bool UseNewLongLShift                          = false                               {ARCH product}
  662.      bool UseOSErrorReporting                       = false                               {pd product}
  663.      bool UseOldInlining                            = true                                {C2 product}
  664.      bool UseOnStackReplacement                     = true                                {pd product}
  665.      bool UseOnlyInlinedBimorphic                   = true                                {C2 product}
  666.      bool UseOptoBiasInlining                       = true                                {C2 product}
  667.      bool UsePSAdaptiveSurvivorSizePolicy           = true                                {product}
  668.      bool UseParNewGC                               = false                               {product}
  669.      bool UseParallelGC                            := true                                {product}
  670.      bool UseParallelOldGC                          = true                                {product}
  671.      bool UsePerfData                               = true                                {product}
  672.      bool UsePopCountInstruction                    = true                                {product}
  673.      bool UseRDPCForConstantTableBase               = false                               {C2 product}
  674.      bool UseRTMDeopt                               = false                               {ARCH product}
  675.      bool UseRTMLocking                             = false                               {ARCH product}
  676.      bool UseSHA                                    = false                               {product}
  677.      bool UseSHA1Intrinsics                         = false                               {product}
  678.      bool UseSHA256Intrinsics                       = false                               {product}
  679.      bool UseSHA512Intrinsics                       = false                               {product}
  680.      intx UseSSE                                    = 4                                   {product}
  681.      bool UseSSE42Intrinsics                        = true                                {product}
  682.      bool UseSerialGC                               = false                               {product}
  683.      bool UseSharedSpaces                           = false                               {product}
  684.      bool UseSignalChaining                         = true                                {product}
  685.      bool UseStoreImmI16                            = false                               {ARCH product}
  686.      bool UseStringDeduplication                    = false                               {product}
  687.      bool UseSuperWord                              = true                                {C2 product}
  688.      bool UseTLAB                                   = true                                {pd product}
  689.      bool UseThreadPriorities                       = true                                {pd product}
  690.      bool UseTypeProfile                            = true                                {product}
  691.      bool UseTypeSpeculation                        = true                                {C2 product}
  692.      bool UseUTCFileTimestamp                       = true                                {product}
  693.      bool UseUnalignedLoadStores                    = true                                {ARCH product}
  694.      bool UseVMInterruptibleIO                      = false                               {product}
  695.      bool UseXMMForArrayCopy                        = true                                {product}
  696.      bool UseXmmI2D                                 = false                               {ARCH product}
  697.      bool UseXmmI2F                                 = false                               {ARCH product}
  698.      bool UseXmmLoadAndClearUpper                   = true                                {ARCH product}
  699.      bool UseXmmRegToRegMoveAll                     = true                                {ARCH product}
  700.      bool VMThreadHintNoPreempt                     = false                               {product}
  701.      intx VMThreadPriority                          = -1                                  {product}
  702.      intx VMThreadStackSize                         = 0                                   {pd product}
  703.      intx ValueMapInitialSize                       = 11                                  {C1 product}
  704.      intx ValueMapMaxLoopSize                       = 8                                   {C1 product}
  705.      intx ValueSearchLimit                          = 1000                                {C2 product}
  706.      bool VerifyMergedCPBytecodes                   = true                                {product}
  707.      bool VerifySharedSpaces                        = false                               {product}
  708.      intx WorkAroundNPTLTimedWaitHang               = 1                                   {product}
  709.     uintx YoungGenerationSizeIncrement              = 20                                  {product}
  710.     uintx YoungGenerationSizeSupplement             = 80                                  {product}
  711.     uintx YoungGenerationSizeSupplementDecay        = 8                                   {product}
  712.     uintx YoungPLABSize                             = 4096                                {product}
  713.      bool ZeroTLAB                                  = false                               {product}
  714.      intx hashCode                                  = 5                                   {product}

6.2、我们使用java -XX: +PrintFlagslnitial 输出到一个文件中

命令：java -XX:+PrintFlagsInitial >2.txt

2.txt内容如下：

  1. [Global flags]
  2.     uintx AdaptiveSizeDecrementScaleFactor          = 4                                   {product}
  3.     uintx AdaptiveSizeMajorGCDecayTimeScale         = 10                                  {product}
  4.     uintx AdaptiveSizePausePolicy                   = 0                                   {product}
  5.     uintx AdaptiveSizePolicyCollectionCostMargin    = 50                                  {product}
  6.     uintx AdaptiveSizePolicyInitializingSteps       = 20                                  {product}
  7.     uintx AdaptiveSizePolicyOutputInterval          = 0                                   {product}
  8.     uintx AdaptiveSizePolicyWeight                  = 10                                  {product}
  9.     uintx AdaptiveSizeThroughPutPolicy              = 0                                   {product}
  10.     uintx AdaptiveTimeWeight                        = 25                                  {product}
  11.      bool AdjustConcurrency                         = false                               {product}
  12.      bool AggressiveOpts                            = false                               {product}
  13.      intx AliasLevel                                = 3                                   {C2 product}
  14.      bool AlignVector                               = true                                {C2 product}
  15.      intx AllocateInstancePrefetchLines             = 1                                   {product}
  16.      intx AllocatePrefetchDistance                  = -1                                  {product}
  17.      intx AllocatePrefetchInstr                     = 0                                   {product}
  18.      intx AllocatePrefetchLines                     = 3                                   {product}
  19.      intx AllocatePrefetchStepSize                  = 16                                  {product}
  20.      intx AllocatePrefetchStyle                     = 1                                   {product}
  21.      bool AllowJNIEnvProxy                          = false                               {product}
  22.      bool AllowNonVirtualCalls                      = false                               {product}
  23.      bool AllowParallelDefineClass                  = false                               {product}
  24.      bool AllowUserSignalHandlers                   = false                               {product}
  25.      bool AlwaysActAsServerClassMachine             = false                               {product}
  26.      bool AlwaysCompileLoopMethods                  = false                               {product}
  27.      bool AlwaysLockClassLoader                     = false                               {product}
  28.      bool AlwaysPreTouch                            = false                               {product}
  29.      bool AlwaysRestoreFPU                          = false                               {product}
  30.      bool AlwaysTenure                              = false                               {product}
  31.      bool AssertOnSuspendWaitFailure                = false                               {product}
  32.      bool AssumeMP                                  = false                               {product}
  33.      intx AutoBoxCacheMax                           = 128                                 {C2 product}
  34.     uintx AutoGCSelectPauseMillis                   = 5000                                {product}
  35.      intx BCEATraceLevel                            = 0                                   {product}
  36.      intx BackEdgeThreshold                         = 100000                              {pd product}
  37.      bool BackgroundCompilation                     = true                                {pd product}
  38.     uintx BaseFootPrintEstimate                     = 268435456                           {product}
  39.      intx BiasedLockingBulkRebiasThreshold          = 20                                  {product}
  40.      intx BiasedLockingBulkRevokeThreshold          = 40                                  {product}
  41.      intx BiasedLockingDecayTime                    = 25000                               {product}
  42.      intx BiasedLockingStartupDelay                 = 4000                                {product}
  43.      bool BindGCTaskThreadsToCPUs                   = false                               {product}
  44.      bool BlockLayoutByFrequency                    = true                                {C2 product}
  45.      intx BlockLayoutMinDiamondPercentage           = 20                                  {C2 product}
  46.      bool BlockLayoutRotateLoops                    = true                                {C2 product}
  47.      bool BranchOnRegister                          = false                               {C2 product}
  48.      bool BytecodeVerificationLocal                 = false                               {product}
  49.      bool BytecodeVerificationRemote                = true                                {product}
  50.      bool C1OptimizeVirtualCallProfiling            = true                                {C1 product}
  51.      bool C1ProfileBranches                         = true                                {C1 product}
  52.      bool C1ProfileCalls                            = true                                {C1 product}
  53.      bool C1ProfileCheckcasts                       = true                                {C1 product}
  54.      bool C1ProfileInlinedCalls                     = true                                {C1 product}
  55.      bool C1ProfileVirtualCalls                     = true                                {C1 product}
  56.      bool C1UpdateMethodData                        = true                                {C1 product}
  57.      intx CICompilerCount                           = 2                                   {product}
  58.      bool CICompilerCountPerCPU                     = false                               {product}
  59.      bool CITime                                    = false                               {product}
  60.      bool CMSAbortSemantics                         = false                               {product}
  61.     uintx CMSAbortablePrecleanMinWorkPerIteration   = 100                                 {product}
  62.      intx CMSAbortablePrecleanWaitMillis            = 100                                 {manageable}
  63.     uintx CMSBitMapYieldQuantum                     = 10485760                            {product}
  64.     uintx CMSBootstrapOccupancy                     = 50                                  {product}
  65.      bool CMSClassUnloadingEnabled                  = true                                {product}
  66.     uintx CMSClassUnloadingMaxInterval              = 0                                   {product}
  67.      bool CMSCleanOnEnter                           = true                                {product}
  68.      bool CMSCompactWhenClearAllSoftRefs            = true                                {product}
  69.     uintx CMSConcMarkMultiple                       = 32                                  {product}
  70.      bool CMSConcurrentMTEnabled                    = true                                {product}
  71.     uintx CMSCoordinatorYieldSleepCount             = 10                                  {product}
  72.      bool CMSDumpAtPromotionFailure                 = false                               {product}
  73.      bool CMSEdenChunksRecordAlways                 = true                                {product}
  74.     uintx CMSExpAvgFactor                           = 50                                  {product}
  75.      bool CMSExtrapolateSweep                       = false                               {product}
  76.     uintx CMSFullGCsBeforeCompaction                = 0                                   {product}
  77.     uintx CMSIncrementalDutyCycle                   = 10                                  {product}
  78.     uintx CMSIncrementalDutyCycleMin                = 0                                   {product}
  79.      bool CMSIncrementalMode                        = false                               {product}
  80.     uintx CMSIncrementalOffset                      = 0                                   {product}
  81.      bool CMSIncrementalPacing                      = true                                {product}
  82.     uintx CMSIncrementalSafetyFactor                = 10                                  {product}
  83.     uintx CMSIndexedFreeListReplenish               = 4                                   {product}
  84.      intx CMSInitiatingOccupancyFraction            = -1                                  {product}
  85.     uintx CMSIsTooFullPercentage                    = 98                                  {product}
  86.    double CMSLargeCoalSurplusPercent                = 0.950000                            {product}
  87.    double CMSLargeSplitSurplusPercent               = 1.000000                            {product}
  88.      bool CMSLoopWarn                               = false                               {product}
  89.     uintx CMSMaxAbortablePrecleanLoops              = 0                                   {product}
  90.      intx CMSMaxAbortablePrecleanTime               = 5000                                {product}
  91.     uintx CMSOldPLABMax                             = 1024                                {product}
  92.     uintx CMSOldPLABMin                             = 16                                  {product}
  93.     uintx CMSOldPLABNumRefills                      = 4                                   {product}
  94.     uintx CMSOldPLABReactivityFactor                = 2                                   {product}
  95.      bool CMSOldPLABResizeQuicker                   = false                               {product}
  96.     uintx CMSOldPLABToleranceFactor                 = 4                                   {product}
  97.      bool CMSPLABRecordAlways                       = true                                {product}
  98.     uintx CMSParPromoteBlocksToClaim                = 16                                  {product}
  99.      bool CMSParallelInitialMarkEnabled             = true                                {product}
  100.      bool CMSParallelRemarkEnabled                  = true                                {product}
  101.      bool CMSParallelSurvivorRemarkEnabled          = true                                {product}
  102.     uintx CMSPrecleanDenominator                    = 3                                   {product}
  103.     uintx CMSPrecleanIter                           = 3                                   {product}
  104.     uintx CMSPrecleanNumerator                      = 2                                   {product}
  105.      bool CMSPrecleanRefLists1                      = true                                {product}
  106.      bool CMSPrecleanRefLists2                      = false                               {product}
  107.      bool CMSPrecleanSurvivors1                     = false                               {product}
  108.      bool CMSPrecleanSurvivors2                     = true                                {product}
  109.     uintx CMSPrecleanThreshold                      = 1000                                {product}
  110.      bool CMSPrecleaningEnabled                     = true                                {product}
  111.      bool CMSPrintChunksInDump                      = false                               {product}
  112.      bool CMSPrintEdenSurvivorChunks                = false                               {product}
  113.      bool CMSPrintObjectsInDump                     = false                               {product}
  114.     uintx CMSRemarkVerifyVariant                    = 1                                   {product}
  115.      bool CMSReplenishIntermediate                  = true                                {product}
  116.     uintx CMSRescanMultiple                         = 32                                  {product}
  117.     uintx CMSSamplingGrain                          = 16384                               {product}
  118.      bool CMSScavengeBeforeRemark                   = false                               {product}
  119.     uintx CMSScheduleRemarkEdenPenetration          = 50                                  {product}
  120.     uintx CMSScheduleRemarkEdenSizeThreshold        = 2097152                             {product}
  121.     uintx CMSScheduleRemarkSamplingRatio            = 5                                   {product}
  122.    double CMSSmallCoalSurplusPercent                = 1.050000                            {product}
  123.    double CMSSmallSplitSurplusPercent               = 1.100000                            {product}
  124.      bool CMSSplitIndexedFreeListBlocks             = true                                {product}
  125.      intx CMSTriggerInterval                        = -1                                  {manageable}
  126.     uintx CMSTriggerRatio                           = 80                                  {product}
  127.      intx CMSWaitDuration                           = 2000                                {manageable}
  128.     uintx CMSWorkQueueDrainThreshold                = 10                                  {product}
  129.      bool CMSYield                                  = true                                {product}
  130.     uintx CMSYieldSleepCount                        = 0                                   {product}
  131.     uintx CMSYoungGenPerWorker                      = 67108864                            {pd product}
  132.     uintx CMS_FLSPadding                            = 1                                   {product}
  133.     uintx CMS_FLSWeight                             = 75                                  {product}
  134.     uintx CMS_SweepPadding                          = 1                                   {product}
  135.     uintx CMS_SweepTimerThresholdMillis             = 10                                  {product}
  136.     uintx CMS_SweepWeight                           = 75                                  {product}
  137.      bool CheckEndorsedAndExtDirs                   = false                               {product}
  138.      bool CheckJNICalls                             = false                               {product}
  139.      bool ClassUnloading                            = true                                {product}
  140.      bool ClassUnloadingWithConcurrentMark          = true                                {product}
  141.      intx ClearFPUAtPark                            = 0                                   {product}
  142.      bool ClipInlining                              = true                                {product}
  143.     uintx CodeCacheExpansionSize                    = 65536                               {pd product}
  144.     uintx CodeCacheMinimumFreeSpace                 = 512000                              {product}
  145.      bool CollectGen0First                          = false                               {product}
  146.      bool CompactFields                             = true                                {product}
  147.      intx CompilationPolicyChoice                   = 0                                   {product}
  148. ccstrlist CompileCommand                            =                                     {product}
  149.     ccstr CompileCommandFile                        =                                     {product}
  150. ccstrlist CompileOnly                               =                                     {product}
  151.      intx CompileThreshold                          = 10000                               {pd product}
  152.      bool CompilerThreadHintNoPreempt               = true                                {product}
  153.      intx CompilerThreadPriority                    = -1                                  {product}
  154.      intx CompilerThreadStackSize                   = 0                                   {pd product}
  155.     uintx CompressedClassSpaceSize                  = 1073741824                          {product}
  156.     uintx ConcGCThreads                             = 0                                   {product}
  157.      intx ConditionalMoveLimit                      = 3                                   {C2 pd product}
  158.      intx ContendedPaddingWidth                     = 128                                 {product}
  159.      bool ConvertSleepToYield                       = true                                {pd product}
  160.      bool ConvertYieldToSleep                       = false                               {product}
  161.      bool CreateMinidumpOnCrash                     = false                               {product}
  162.      bool CriticalJNINatives                        = true                                {product}
  163.      bool DTraceAllocProbes                         = false                               {product}
  164.      bool DTraceMethodProbes                        = false                               {product}
  165.      bool DTraceMonitorProbes                       = false                               {product}
  166.      bool Debugging                                 = false                               {product}
  167.     uintx DefaultMaxRAMFraction                     = 4                                   {product}
  168.      intx DefaultThreadPriority                     = -1                                  {product}
  169.      intx DeferPollingPageLoopCount                 = -1                                  {product}
  170.      intx DeferThrSuspendLoopCount                  = 4000                                {product}
  171.      bool DeoptimizeRandom                          = false                               {product}
  172.      bool DisableAttachMechanism                    = false                               {product}
  173.      bool DisableExplicitGC                         = false                               {product}
  174.      bool DisplayVMOutputToStderr                   = false                               {product}
  175.      bool DisplayVMOutputToStdout                   = false                               {product}
  176.      bool DoEscapeAnalysis                          = true                                {C2 product}
  177.      bool DontCompileHugeMethods                    = true                                {product}
  178.      bool DontYieldALot                             = false                               {pd product}
  179.     ccstr DumpLoadedClassList                       =                                     {product}
  180.      bool DumpReplayDataOnError                     = true                                {product}
  181.      bool DumpSharedSpaces                          = false                               {product}
  182.      bool EagerXrunInit                             = false                               {product}
  183.      intx EliminateAllocationArraySizeLimit         = 64                                  {C2 product}
  184.      bool EliminateAllocations                      = true                                {C2 product}
  185.      bool EliminateAutoBox                          = true                                {C2 product}
  186.      bool EliminateLocks                            = true                                {C2 product}
  187.      bool EliminateNestedLocks                      = true                                {C2 product}
  188.      intx EmitSync                                  = 0                                   {product}
  189.      bool EnableContended                           = true                                {product}
  190.      bool EnableSharedLookupCache                   = true                                {product}
  191.      bool EnableTracing                             = false                               {product}
  192.     uintx ErgoHeapSizeLimit                         = 0                                   {product}
  193.     ccstr ErrorFile                                 =                                     {product}
  194.     ccstr ErrorReportServer                         =                                     {product}
  195.    double EscapeAnalysisTimeout                     = 20.000000                           {C2 product}
  196.      bool EstimateArgEscape                         = true                                {product}
  197.      bool ExplicitGCInvokesConcurrent               = false                               {product}
  198.      bool ExplicitGCInvokesConcurrentAndUnloadsClasses  = false                               {product}
  199.      bool ExtendedDTraceProbes                      = false                               {product}
  200.     ccstr ExtraSharedClassListFile                  =                                     {product}
  201.      bool FLSAlwaysCoalesceLarge                    = false                               {product}
  202.     uintx FLSCoalescePolicy                         = 2                                   {product}
  203.    double FLSLargestBlockCoalesceProximity          = 0.990000                            {product}
  204.      bool FailOverToOldVerifier                     = true                                {product}
  205.      bool FastTLABRefill                            = true                                {product}
  206.      intx FenceInstruction                          = 0                                   {ARCH product}
  207.      intx FieldsAllocationStyle                     = 1                                   {product}
  208.      bool FilterSpuriousWakeups                     = true                                {product}
  209.     ccstr FlightRecorderOptions                     =                                     {product}
  210.      bool ForceNUMA                                 = false                               {product}
  211.      bool ForceTimeHighResolution                   = false                               {product}
  212.      intx FreqInlineSize                            = 325                                 {pd product}
  213.    double G1ConcMarkStepDurationMillis              = 10.000000                           {product}
  214.     uintx G1ConcRSHotCardLimit                      = 4                                   {product}
  215.     uintx G1ConcRSLogCacheSize                      = 10                                  {product}
  216.      intx G1ConcRefinementGreenZone                 = 0                                   {product}
  217.      intx G1ConcRefinementRedZone                   = 0                                   {product}
  218.      intx G1ConcRefinementServiceIntervalMillis     = 300                                 {product}
  219.     uintx G1ConcRefinementThreads                   = 0                                   {product}
  220.      intx G1ConcRefinementThresholdStep             = 0                                   {product}
  221.      intx G1ConcRefinementYellowZone                = 0                                   {product}
  222.     uintx G1ConfidencePercent                       = 50                                  {product}
  223.     uintx G1HeapRegionSize                          = 0                                   {product}
  224.     uintx G1HeapWastePercent                        = 5                                   {product}
  225.     uintx G1MixedGCCountTarget                      = 8                                   {product}
  226.      intx G1RSetRegionEntries                       = 0                                   {product}
  227.     uintx G1RSetScanBlockSize                       = 64                                  {product}
  228.      intx G1RSetSparseRegionEntries                 = 0                                   {product}
  229.      intx G1RSetUpdatingPauseTimePercent            = 10                                  {product}
  230.      intx G1RefProcDrainInterval                    = 10                                  {product}
  231.     uintx G1ReservePercent                          = 10                                  {product}
  232.     uintx G1SATBBufferEnqueueingThresholdPercent    = 60                                  {product}
  233.      intx G1SATBBufferSize                          = 1024                                {product}
  234.      intx G1UpdateBufferSize                        = 256                                 {product}
  235.      bool G1UseAdaptiveConcRefinement               = true                                {product}
  236.     uintx GCDrainStackTargetSize                    = 64                                  {product}
  237.     uintx GCHeapFreeLimit                           = 2                                   {product}
  238.     uintx GCLockerEdenExpansionPercent              = 5                                   {product}
  239.      bool GCLockerInvokesConcurrent                 = false                               {product}
  240.     uintx GCLogFileSize                             = 8192                                {product}
  241.     uintx GCPauseIntervalMillis                     = 0                                   {product}
  242.     uintx GCTaskTimeStampEntries                    = 200                                 {product}
  243.     uintx GCTimeLimit                               = 98                                  {product}
  244.     uintx GCTimeRatio                               = 99                                  {product}
  245.     uintx HeapBaseMinAddress                        = 2147483648                          {pd product}
  246.      bool HeapDumpAfterFullGC                       = false                               {manageable}
  247.      bool HeapDumpBeforeFullGC                      = false                               {manageable}
  248.      bool HeapDumpOnOutOfMemoryError                = false                               {manageable}
  249.     ccstr HeapDumpPath                              =                                     {manageable}
  250.     uintx HeapFirstMaximumCompactionCount           = 3                                   {product}
  251.     uintx HeapMaximumCompactionInterval             = 20                                  {product}
  252.     uintx HeapSizePerGCThread                       = 87241520                            {product}
  253.      bool IgnoreEmptyClassPaths                     = false                               {product}
  254.      bool IgnoreUnrecognizedVMOptions               = false                               {product}
  255.     uintx IncreaseFirstTierCompileThresholdAt       = 50                                  {product}
  256.      bool IncrementalInline                         = true                                {C2 product}
  257.     uintx InitialBootClassLoaderMetaspaceSize       = 4194304                             {product}
  258.     uintx InitialCodeCacheSize                      = 2555904                             {pd product}
  259.     uintx InitialHeapSize                           = 0                                   {product}
  260.     uintx InitialRAMFraction                        = 64                                  {product}
  261.     uintx InitialSurvivorRatio                      = 8                                   {product}
  262.     uintx InitialTenuringThreshold                  = 7                                   {product}
  263.     uintx InitiatingHeapOccupancyPercent            = 45                                  {product}
  264.      bool Inline                                    = true                                {product}
  265.     ccstr InlineDataFile                            =                                     {product}
  266.      intx InlineSmallCode                           = 1000                                {pd product}
  267.      bool InlineSynchronizedMethods                 = true                                {C1 product}
  268.      bool InsertMemBarAfterArraycopy                = true                                {C2 product}
  269.      intx InteriorEntryAlignment                    = 16                                  {C2 pd product}
  270.      intx InterpreterProfilePercentage              = 33                                  {product}
  271.      bool JNIDetachReleasesMonitors                 = true                                {product}
  272.      bool JavaMonitorsInStackTrace                  = true                                {product}
  273.      intx JavaPriority10_To_OSPriority              = -1                                  {product}
  274.      intx JavaPriority1_To_OSPriority               = -1                                  {product}
  275.      intx JavaPriority2_To_OSPriority               = -1                                  {product}
  276.      intx JavaPriority3_To_OSPriority               = -1                                  {product}
  277.      intx JavaPriority4_To_OSPriority               = -1                                  {product}
  278.      intx JavaPriority5_To_OSPriority               = -1                                  {product}
  279.      intx JavaPriority6_To_OSPriority               = -1                                  {product}
  280.      intx JavaPriority7_To_OSPriority               = -1                                  {product}
  281.      intx JavaPriority8_To_OSPriority               = -1                                  {product}
  282.      intx JavaPriority9_To_OSPriority               = -1                                  {product}
  283.      bool LIRFillDelaySlots                         = false                               {C1 pd product}
  284.     uintx LargePageHeapSizeThreshold                = 134217728                           {product}
  285.     uintx LargePageSizeInBytes                      = 0                                   {product}
  286.      bool LazyBootClassLoader                       = true                                {product}
  287.      intx LiveNodeCountInliningCutoff               = 40000                               {C2 product}
  288.      bool LogCommercialFeatures                     = false                               {product}
  289.      intx LoopMaxUnroll                             = 16                                  {C2 product}
  290.      intx LoopOptsCount                             = 43                                  {C2 product}
  291.      intx LoopUnrollLimit                           = 60                                  {C2 pd product}
  292.      intx LoopUnrollMin                             = 4                                   {C2 product}
  293.      bool LoopUnswitching                           = true                                {C2 product}
  294.      bool ManagementServer                          = false                               {product}
  295.     uintx MarkStackSize                             = 4194304                             {product}
  296.     uintx MarkStackSizeMax                          = 536870912                           {product}
  297.     uintx MarkSweepAlwaysCompactCount               = 4                                   {product}
  298.     uintx MarkSweepDeadRatio                        = 5                                   {product}
  299.      intx MaxBCEAEstimateLevel                      = 5                                   {product}
  300.      intx MaxBCEAEstimateSize                       = 150                                 {product}
  301.     uintx MaxDirectMemorySize                       = 0                                   {product}
  302.      bool MaxFDLimit                                = true                                {product}
  303.     uintx MaxGCMinorPauseMillis                     = 4294967295                          {product}
  304.     uintx MaxGCPauseMillis                          = 4294967295                          {product}
  305.     uintx MaxHeapFreeRatio                          = 70                                  {manageable}
  306.     uintx MaxHeapSize                               = 130862280                           {product}
  307.      intx MaxInlineLevel                            = 9                                   {product}
  308.      intx MaxInlineSize                             = 35                                  {product}
  309.      intx MaxJNILocalCapacity                       = 65536                               {product}
  310.      intx MaxJavaStackTraceDepth                    = 1024                                {product}
  311.      intx MaxJumpTableSize                          = 65000                               {C2 product}
  312.      intx MaxJumpTableSparseness                    = 5                                   {C2 product}
  313.      intx MaxLabelRootDepth                         = 1100                                {C2 product}
  314.      intx MaxLoopPad                                = 15                                  {C2 product}
  315.     uintx MaxMetaspaceExpansion                     = 5452592                             {product}
  316.     uintx MaxMetaspaceFreeRatio                     = 70                                  {product}
  317.     uintx MaxMetaspaceSize                          = 4294967295                          {product}
  318.     uintx MaxNewSize                                = 4294967295                          {product}
  319.      intx MaxNodeLimit                              = 80000                               {C2 product}
  320.  uint64_t MaxRAM                                    = 0                                   {pd product}
  321.     uintx MaxRAMFraction                            = 4                                   {product}
  322.      intx MaxRecursiveInlineLevel                   = 1                                   {product}
  323.     uintx MaxTenuringThreshold                      = 15                                  {product}
  324.      intx MaxTrivialSize                            = 6                                   {product}
  325.      intx MaxVectorSize                             = 32                                  {C2 product}
  326.     uintx MetaspaceSize                             = 21810376                            {pd product}
  327.      bool MethodFlushing                            = true                                {product}
  328.     uintx MinHeapDeltaBytes                         = 170392                              {product}
  329.     uintx MinHeapFreeRatio                          = 40                                  {manageable}
  330.      intx MinInliningThreshold                      = 250                                 {product}
  331.      intx MinJumpTableSize                          = 10                                  {C2 pd product}
  332.     uintx MinMetaspaceExpansion                     = 340784                              {product}
  333.     uintx MinMetaspaceFreeRatio                     = 40                                  {product}
  334.     uintx MinRAMFraction                            = 2                                   {product}
  335.     uintx MinSurvivorRatio                          = 3                                   {product}
  336.     uintx MinTLABSize                               = 2048                                {product}
  337.      intx MonitorBound                              = 0                                   {product}
  338.      bool MonitorInUseLists                         = false                               {product}
  339.      intx MultiArrayExpandLimit                     = 6                                   {C2 product}
  340.      bool MustCallLoadClassInternal                 = false                               {product}
  341.     uintx NUMAChunkResizeWeight                     = 20                                  {product}
  342.     uintx NUMAInterleaveGranularity                 = 2097152                             {product}
  343.     uintx NUMAPageScanRate                          = 256                                 {product}
  344.     uintx NUMASpaceResizeRate                       = 1073741824                          {product}
  345.      bool NUMAStats                                 = false                               {product}
  346.     ccstr NativeMemoryTracking                      = off                                 {product}
  347.      bool NeedsDeoptSuspend                         = false                               {pd product}
  348.      bool NeverActAsServerClassMachine              = false                               {pd product}
  349.      bool NeverTenure                               = false                               {product}
  350.     uintx NewRatio                                  = 2                                   {product}
  351.     uintx NewSize                                   = 1363144                             {product}
  352.     uintx NewSizeThreadIncrease                     = 5320                                {pd product}
  353.      intx NmethodSweepActivity                      = 10                                  {product}
  354.      intx NmethodSweepCheckInterval                 = 5                                   {product}
  355.      intx NmethodSweepFraction                      = 16                                  {product}
  356.      intx NodeLimitFudgeFactor                      = 2000                                {C2 product}
  357.     uintx NumberOfGCLogFiles                        = 0                                   {product}
  358.      intx NumberOfLoopInstrToAlign                  = 4                                   {C2 product}
  359.      intx ObjectAlignmentInBytes                    = 8                                   {lp64_product}
  360.     uintx OldPLABSize                               = 1024                                {product}
  361.     uintx OldPLABWeight                             = 50                                  {product}
  362.     uintx OldSize                                   = 5452592                             {product}
  363.      bool OmitStackTraceInFastThrow                 = true                                {product}
  364. ccstrlist OnError                                   =                                     {product}
  365. ccstrlist OnOutOfMemoryError                        =                                     {product}
  366.      intx OnStackReplacePercentage                  = 140                                 {pd product}
  367.      bool OptimizeFill                              = true                                {C2 product}
  368.      bool OptimizePtrCompare                        = true                                {C2 product}
  369.      bool OptimizeStringConcat                      = true                                {C2 product}
  370.      bool OptoBundling                              = false                               {C2 pd product}
  371.      intx OptoLoopAlignment                         = 16                                  {pd product}
  372.      bool OptoScheduling                            = false                               {C2 pd product}
  373.     uintx PLABWeight                                = 75                                  {product}
  374.      bool PSChunkLargeArrays                        = true                                {product}
  375.      intx ParGCArrayScanChunk                       = 50                                  {product}
  376.     uintx ParGCDesiredObjsFromOverflowList          = 20                                  {product}
  377.      bool ParGCTrimOverflow                         = true                                {product}
  378.      bool ParGCUseLocalOverflow                     = false                               {product}
  379.     uintx ParallelGCBufferWastePct                  = 10                                  {product}
  380.     uintx ParallelGCThreads                         = 0                                   {product}
  381.      bool ParallelGCVerbose                         = false                               {product}
  382.     uintx ParallelOldDeadWoodLimiterMean            = 50                                  {product}
  383.     uintx ParallelOldDeadWoodLimiterStdDev          = 80                                  {product}
  384.      bool ParallelRefProcBalancingEnabled           = true                                {product}
  385.      bool ParallelRefProcEnabled                    = false                               {product}
  386.      bool PartialPeelAtUnsignedTests                = true                                {C2 product}
  387.      bool PartialPeelLoop                           = true                                {C2 product}
  388.      intx PartialPeelNewPhiDelta                    = 0                                   {C2 product}
  389.     uintx PausePadding                              = 1                                   {product}
  390.      intx PerBytecodeRecompilationCutoff            = 200                                 {product}
  391.      intx PerBytecodeTrapLimit                      = 4                                   {product}
  392.      intx PerMethodRecompilationCutoff              = 400                                 {product}
  393.      intx PerMethodTrapLimit                        = 100                                 {product}
  394.      bool PerfAllowAtExitRegistration               = false                               {product}
  395.      bool PerfBypassFileSystemCheck                 = false                               {product}
  396.      intx PerfDataMemorySize                        = 32768                               {product}
  397.      intx PerfDataSamplingInterval                  = 50                                  {product}
  398.     ccstr PerfDataSaveFile                          =                                     {product}
  399.      bool PerfDataSaveToFile                        = false                               {product}
  400.      bool PerfDisableSharedMem                      = false                               {product}
  401.      intx PerfMaxStringConstLength                  = 1024                                {product}
  402.      intx PreInflateSpin                            = 10                                  {pd product}
  403.      bool PreferInterpreterNativeStubs              = false                               {pd product}
  404.      intx PrefetchCopyIntervalInBytes               = -1                                  {product}
  405.      intx PrefetchFieldsAhead                       = -1                                  {product}
  406.      intx PrefetchScanIntervalInBytes               = -1                                  {product}
  407.      bool PreserveAllAnnotations                    = false                               {product}
  408.     uintx PretenureSizeThreshold                    = 0                                   {product}
  409.      bool PrintAdaptiveSizePolicy                   = false                               {product}
  410.      bool PrintCMSInitiationStatistics              = false                               {product}
  411.      intx PrintCMSStatistics                        = 0                                   {product}
  412.      bool PrintClassHistogram                       = false                               {manageable}
  413.      bool PrintClassHistogramAfterFullGC            = false                               {manageable}
  414.      bool PrintClassHistogramBeforeFullGC           = false                               {manageable}
  415.      bool PrintCodeCache                            = false                               {product}
  416.      bool PrintCodeCacheOnCompilation               = false                               {product}
  417.      bool PrintCommandLineFlags                     = false                               {product}
  418.      bool PrintCompilation                          = false                               {product}
  419.      bool PrintConcurrentLocks                      = false                               {manageable}
  420.      intx PrintFLSCensus                            = 0                                   {product}
  421.      intx PrintFLSStatistics                        = 0                                   {product}
  422.      bool PrintFlagsFinal                           = false                               {product}
  423.      bool PrintFlagsInitial                         = false                               {product}
  424.      bool PrintGC                                   = false                               {manageable}
  425.      bool PrintGCApplicationConcurrentTime          = false                               {product}
  426.      bool PrintGCApplicationStoppedTime             = false                               {product}
  427.      bool PrintGCCause                              = true                                {product}
  428.      bool PrintGCDateStamps                         = false                               {manageable}
  429.      bool PrintGCDetails                            = false                               {manageable}
  430.      bool PrintGCID                                 = false                               {manageable}
  431.      bool PrintGCTaskTimeStamps                     = false                               {product}
  432.      bool PrintGCTimeStamps                         = false                               {manageable}
  433.      bool PrintHeapAtGC                             = false                               {product rw}
  434.      bool PrintHeapAtGCExtended                     = false                               {product rw}
  435.      bool PrintHeapAtSIGBREAK                       = true                                {product}
  436.      bool PrintJNIGCStalls                          = false                               {product}
  437.      bool PrintJNIResolving                         = false                               {product}
  438.      bool PrintOldPLAB                              = false                               {product}
  439.      bool PrintOopAddress                           = false                               {product}
  440.      bool PrintPLAB                                 = false                               {product}
  441.      bool PrintParallelOldGCPhaseTimes              = false                               {product}
  442.      bool PrintPromotionFailure                     = false                               {product}
  443.      bool PrintReferenceGC                          = false                               {product}
  444.      bool PrintSafepointStatistics                  = false                               {product}
  445.      intx PrintSafepointStatisticsCount             = 300                                 {product}
  446.      intx PrintSafepointStatisticsTimeout           = -1                                  {product}
  447.      bool PrintSharedArchiveAndExit                 = false                               {product}
  448.      bool PrintSharedDictionary                     = false                               {product}
  449.      bool PrintSharedSpaces                         = false                               {product}
  450.      bool PrintStringDeduplicationStatistics        = false                               {product}
  451.      bool PrintStringTableStatistics                = false                               {product}
  452.      bool PrintTLAB                                 = false                               {product}
  453.      bool PrintTenuringDistribution                 = false                               {product}
  454.      bool PrintTieredEvents                         = false                               {product}
  455.      bool PrintVMOptions                            = false                               {product}
  456.      bool PrintVMQWaitTime                          = false                               {product}
  457.      bool PrintWarnings                             = true                                {product}
  458.     uintx ProcessDistributionStride                 = 4                                   {product}
  459.      bool ProfileInterpreter                        = true                                {pd product}
  460.      bool ProfileIntervals                          = false                               {product}
  461.      intx ProfileIntervalsTicks                     = 100                                 {product}
  462.      intx ProfileMaturityPercentage                 = 20                                  {product}
  463.      bool ProfileVM                                 = false                               {product}
  464.      bool ProfilerPrintByteCodeStatistics           = false                               {product}
  465.      bool ProfilerRecordPC                          = false                               {product}
  466.     uintx PromotedPadding                           = 3                                   {product}
  467.     uintx QueuedAllocationWarningCount              = 0                                   {product}
  468.     uintx RTMRetryCount                             = 5                                   {ARCH product}
  469.      bool RangeCheckElimination                     = true                                {product}
  470.      intx ReadPrefetchInstr                         = 0                                   {ARCH product}
  471.      bool ReassociateInvariants                     = true                                {C2 product}
  472.      bool ReduceBulkZeroing                         = true                                {C2 product}
  473.      bool ReduceFieldZeroing                        = true                                {C2 product}
  474.      bool ReduceInitialCardMarks                    = true                                {C2 product}
  475.      bool ReduceSignalUsage                         = false                               {product}
  476.      intx RefDiscoveryPolicy                        = 0                                   {product}
  477.      bool ReflectionWrapResolutionErrors            = true                                {product}
  478.      bool RegisterFinalizersAtInit                  = true                                {product}
  479.      bool RelaxAccessControlCheck                   = false                               {product}
  480.     ccstr ReplayDataFile                            =                                     {product}
  481.      bool RequireSharedSpaces                       = false                               {product}
  482.     uintx ReservedCodeCacheSize                     = 50331648                            {pd product}
  483.      bool ResizeOldPLAB                             = true                                {product}
  484.      bool ResizePLAB                                = true                                {product}
  485.      bool ResizeTLAB                                = true                                {pd product}
  486.      bool RestoreMXCSROnJNICalls                    = false                               {product}
  487.      bool RestrictContended                         = true                                {product}
  488.      bool RewriteBytecodes                          = true                                {pd product}
  489.      bool RewriteFrequentPairs                      = true                                {pd product}
  490.      intx SafepointPollOffset                       = 256                                 {C1 pd product}
  491.      intx SafepointSpinBeforeYield                  = 2000                                {product}
  492.      bool SafepointTimeout                          = false                               {product}
  493.      intx SafepointTimeoutDelay                     = 10000                               {product}
  494.      bool ScavengeBeforeFullGC                      = true                                {product}
  495.      intx SelfDestructTimer                         = 0                                   {product}
  496.     uintx SharedBaseAddress                         = 0                                   {product}
  497.     ccstr SharedClassListFile                       =                                     {product}
  498.     uintx SharedMiscCodeSize                        = 122880                              {product}
  499.     uintx SharedMiscDataSize                        = 4194304                             {product}
  500.     uintx SharedReadOnlySize                        = 16777216                            {product}
  501.     uintx SharedReadWriteSize                       = 16777216                            {product}
  502.      bool ShowMessageBoxOnError                     = false                               {product}
  503.      intx SoftRefLRUPolicyMSPerMB                   = 1000                                {product}
  504.      bool SpecialEncodeISOArray                     = true                                {C2 product}
  505.      bool SplitIfBlocks                             = true                                {C2 product}
  506.      intx StackRedPages                             = 1                                   {pd product}
  507.      intx StackShadowPages                          = 6                                   {pd product}
  508.      bool StackTraceInThrowable                     = true                                {product}
  509.      intx StackYellowPages                          = 3                                   {pd product}
  510.      bool StartAttachListener                       = false                               {product}
  511.      intx StarvationMonitorInterval                 = 200                                 {product}
  512.      bool StressLdcRewrite                          = false                               {product}
  513.     uintx StringDeduplicationAgeThreshold           = 3                                   {product}
  514.     uintx StringTableSize                           = 60013                               {product}
  515.      bool SuppressFatalErrorMessage                 = false                               {product}
  516.     uintx SurvivorPadding                           = 3                                   {product}
  517.     uintx SurvivorRatio                             = 8                                   {product}
  518.      intx SuspendRetryCount                         = 50                                  {product}
  519.      intx SuspendRetryDelay                         = 5                                   {product}
  520.      intx SyncFlags                                 = 0                                   {product}
  521.     ccstr SyncKnobs                                 =                                     {product}
  522.      intx SyncVerbose                               = 0                                   {product}
  523.     uintx TLABAllocationWeight                      = 35                                  {product}
  524.     uintx TLABRefillWasteFraction                   = 64                                  {product}
  525.     uintx TLABSize                                  = 0                                   {product}
  526.      bool TLABStats                                 = true                                {product}
  527.     uintx TLABWasteIncrement                        = 4                                   {product}
  528.     uintx TLABWasteTargetPercent                    = 1                                   {product}
  529.     uintx TargetPLABWastePct                        = 10                                  {product}
  530.     uintx TargetSurvivorRatio                       = 50                                  {product}
  531.     uintx TenuredGenerationSizeIncrement            = 20                                  {product}
  532.     uintx TenuredGenerationSizeSupplement           = 80                                  {product}
  533.     uintx TenuredGenerationSizeSupplementDecay      = 2                                   {product}
  534.      intx ThreadPriorityPolicy                      = 0                                   {product}
  535.      bool ThreadPriorityVerbose                     = false                               {product}
  536.     uintx ThreadSafetyMargin                        = 52428800                            {product}
  537.      intx ThreadStackSize                           = 0                                   {pd product}
  538.     uintx ThresholdTolerance                        = 10                                  {product}
  539.      intx Tier0BackedgeNotifyFreqLog                = 10                                  {product}
  540.      intx Tier0InvokeNotifyFreqLog                  = 7                                   {product}
  541.      intx Tier0ProfilingStartPercentage             = 200                                 {product}
  542.      intx Tier23InlineeNotifyFreqLog                = 20                                  {product}
  543.      intx Tier2BackEdgeThreshold                    = 0                                   {product}
  544.      intx Tier2BackedgeNotifyFreqLog                = 14                                  {product}
  545.      intx Tier2CompileThreshold                     = 0                                   {product}
  546.      intx Tier2InvokeNotifyFreqLog                  = 11                                  {product}
  547.      intx Tier3BackEdgeThreshold                    = 60000                               {product}
  548.      intx Tier3BackedgeNotifyFreqLog                = 13                                  {product}
  549.      intx Tier3CompileThreshold                     = 2000                                {product}
  550.      intx Tier3DelayOff                             = 2                                   {product}
  551.      intx Tier3DelayOn                              = 5                                   {product}
  552.      intx Tier3InvocationThreshold                  = 200                                 {product}
  553.      intx Tier3InvokeNotifyFreqLog                  = 10                                  {product}
  554.      intx Tier3LoadFeedback                         = 5                                   {product}
  555.      intx Tier3MinInvocationThreshold               = 100                                 {product}
  556.      intx Tier4BackEdgeThreshold                    = 40000                               {product}
  557.      intx Tier4CompileThreshold                     = 15000                               {product}
  558.      intx Tier4InvocationThreshold                  = 5000                                {product}
  559.      intx Tier4LoadFeedback                         = 3                                   {product}
  560.      intx Tier4MinInvocationThreshold               = 600                                 {product}
  561.      bool TieredCompilation                         = true                                {pd product}
  562.      intx TieredCompileTaskTimeout                  = 50                                  {product}
  563.      intx TieredRateUpdateMaxTime                   = 25                                  {product}
  564.      intx TieredRateUpdateMinTime                   = 1                                   {product}
  565.      intx TieredStopAtLevel                         = 4                                   {product}
  566.      bool TimeLinearScan                            = false                               {C1 product}
  567.      bool TraceBiasedLocking                        = false                               {product}
  568.      bool TraceClassLoading                         = false                               {product rw}
  569.      bool TraceClassLoadingPreorder                 = false                               {product}
  570.      bool TraceClassPaths                           = false                               {product}
  571.      bool TraceClassResolution                      = false                               {product}
  572.      bool TraceClassUnloading                       = false                               {product rw}
  573.      bool TraceDynamicGCThreads                     = false                               {product}
  574.      bool TraceGen0Time                             = false                               {product}
  575.      bool TraceGen1Time                             = false                               {product}
  576.     ccstr TraceJVMTI                                =                                     {product}
  577.      bool TraceLoaderConstraints                    = false                               {product rw}
  578.      bool TraceMetadataHumongousAllocation          = false                               {product}
  579.      bool TraceMonitorInflation                     = false                               {product}
  580.      bool TraceParallelOldGCTasks                   = false                               {product}
  581.      intx TraceRedefineClasses                      = 0                                   {product}
  582.      bool TraceSafepointCleanupTime                 = false                               {product}
  583.      bool TraceSharedLookupCache                    = false                               {product}
  584.      bool TraceSuspendWaitFailures                  = false                               {product}
  585.      intx TrackedInitializationLimit                = 50                                  {C2 product}
  586.      bool TransmitErrorReport                       = false                               {product}
  587.      bool TrapBasedNullChecks                       = false                               {pd product}
  588.      bool TrapBasedRangeChecks                      = false                               {C2 pd product}
  589.      intx TypeProfileArgsLimit                      = 2                                   {product}
  590.     uintx TypeProfileLevel                          = 111                                 {pd product}
  591.      intx TypeProfileMajorReceiverPercent           = 90                                  {C2 product}
  592.      intx TypeProfileParmsLimit                     = 2                                   {product}
  593.      intx TypeProfileWidth                          = 2                                   {product}
  594.      intx UnguardOnExecutionViolation               = 0                                   {product}
  595.      bool UnlinkSymbolsALot                         = false                               {product}
  596.      bool Use486InstrsOnly                          = false                               {ARCH product}
  597.      bool UseAES                                    = false                               {product}
  598.      bool UseAESIntrinsics                          = false                               {product}
  599.      intx UseAVX                                    = 99                                  {ARCH product}
  600.      bool UseAdaptiveGCBoundary                     = false                               {product}
  601.      bool UseAdaptiveGenerationSizePolicyAtMajorCollection  = true                                {product}
  602.      bool UseAdaptiveGenerationSizePolicyAtMinorCollection  = true                                {product}
  603.      bool UseAdaptiveNUMAChunkSizing                = true                                {product}
  604.      bool UseAdaptiveSizeDecayMajorGCCost           = true                                {product}
  605.      bool UseAdaptiveSizePolicy                     = true                                {product}
  606.      bool UseAdaptiveSizePolicyFootprintGoal        = true                                {product}
  607.      bool UseAdaptiveSizePolicyWithSystemGC         = false                               {product}
  608.      bool UseAddressNop                             = false                               {ARCH product}
  609.      bool UseAltSigs                                = false                               {product}
  610.      bool UseAutoGCSelectPolicy                     = false                               {product}
  611.      bool UseBMI1Instructions                       = false                               {ARCH product}
  612.      bool UseBMI2Instructions                       = false                               {ARCH product}
  613.      bool UseBiasedLocking                          = true                                {product}
  614.      bool UseBimorphicInlining                      = true                                {C2 product}
  615.      bool UseBoundThreads                           = true                                {product}
  616.      bool UseCLMUL                                  = false                               {ARCH product}
  617.      bool UseCMSBestFit                             = true                                {product}
  618.      bool UseCMSCollectionPassing                   = true                                {product}
  619.      bool UseCMSCompactAtFullCollection             = true                                {product}
  620.      bool UseCMSInitiatingOccupancyOnly             = false                               {product}
  621.      bool UseCRC32Intrinsics                        = false                               {product}
  622.      bool UseCodeCacheFlushing                      = true                                {product}
  623.      bool UseCompiler                               = true                                {product}
  624.      bool UseCompilerSafepoints                     = true                                {product}
  625.      bool UseCompressedClassPointers                = false                               {lp64_product}
  626.      bool UseCompressedOops                         = false                               {lp64_product}
  627.      bool UseConcMarkSweepGC                        = false                               {product}
  628.      bool UseCondCardMark                           = false                               {C2 product}
  629.      bool UseCountLeadingZerosInstruction           = false                               {ARCH product}
  630.      bool UseCountTrailingZerosInstruction          = false                               {ARCH product}
  631.      bool UseCounterDecay                           = true                                {product}
  632.      bool UseDivMod                                 = true                                {C2 product}
  633.      bool UseDynamicNumberOfGCThreads               = false                               {product}
  634.      bool UseFPUForSpilling                         = false                               {C2 product}
  635.      bool UseFastAccessorMethods                    = true                                {product}
  636.      bool UseFastEmptyMethods                       = true                                {product}
  637.      bool UseFastJNIAccessors                       = true                                {product}
  638.      bool UseFastStosb                              = false                               {ARCH product}
  639.      bool UseG1GC                                   = false                               {product}
  640.      bool UseGCLogFileRotation                      = false                               {product}
  641.      bool UseGCOverheadLimit                        = true                                {product}
  642.      bool UseGCTaskAffinity                         = false                               {product}
  643.      bool UseHeavyMonitors                          = false                               {product}
  644.      bool UseInlineCaches                           = true                                {product}
  645.      bool UseInterpreter                            = true                                {product}
  646.      bool UseJumpTables                             = true                                {C2 product}
  647.      bool UseLWPSynchronization                     = true                                {product}
  648.      bool UseLargePages                             = false                               {pd product}
  649.      bool UseLargePagesInMetaspace                  = false                               {product}
  650.      bool UseLargePagesIndividualAllocation        := false                               {pd product}
  651.      bool UseLockedTracing                          = false                               {product}
  652.      bool UseLoopCounter                            = true                                {product}
  653.      bool UseLoopInvariantCodeMotion                = true                                {C1 product}
  654.      bool UseLoopPredicate                          = true                                {C2 product}
  655.      bool UseMathExactIntrinsics                    = true                                {C2 product}
  656.      bool UseMaximumCompactionOnSystemGC            = true                                {product}
  657.      bool UseMembar                                 = false                               {pd product}
  658.      bool UseMultiplyToLenIntrinsic                 = false                               {C2 product}
  659.      bool UseNUMA                                   = false                               {product}
  660.      bool UseNUMAInterleaving                       = false                               {product}
  661.      bool UseNewLongLShift                          = false                               {ARCH product}
  662.      bool UseOSErrorReporting                       = false                               {pd product}
  663.      bool UseOldInlining                            = true                                {C2 product}
  664.      bool UseOnStackReplacement                     = true                                {pd product}
  665.      bool UseOnlyInlinedBimorphic                   = true                                {C2 product}
  666.      bool UseOptoBiasInlining                       = true                                {C2 product}
  667.      bool UsePSAdaptiveSurvivorSizePolicy           = true                                {product}
  668.      bool UseParNewGC                               = false                               {product}
  669.      bool UseParallelGC                             = false                               {product}
  670.      bool UseParallelOldGC                          = false                               {product}
  671.      bool UsePerfData                               = true                                {product}
  672.      bool UsePopCountInstruction                    = false                               {product}
  673.      bool UseRDPCForConstantTableBase               = false                               {C2 product}
  674.      bool UseRTMDeopt                               = false                               {ARCH product}
  675.      bool UseRTMLocking                             = false                               {ARCH product}
  676.      bool UseSHA                                    = false                               {product}
  677.      bool UseSHA1Intrinsics                         = false                               {product}
  678.      bool UseSHA256Intrinsics                       = false                               {product}
  679.      bool UseSHA512Intrinsics                       = false                               {product}
  680.      intx UseSSE                                    = 99                                  {product}
  681.      bool UseSSE42Intrinsics                        = false                               {product}
  682.      bool UseSerialGC                               = false                               {product}
  683.      bool UseSharedSpaces                           = true                                {product}
  684.      bool UseSignalChaining                         = true                                {product}
  685.      bool UseStoreImmI16                            = true                                {ARCH product}
  686.      bool UseStringDeduplication                    = false                               {product}
  687.      bool UseSuperWord                              = true                                {C2 product}
  688.      bool UseTLAB                                   = true                                {pd product}
  689.      bool UseThreadPriorities                       = true                                {pd product}
  690.      bool UseTypeProfile                            = true                                {product}
  691.      bool UseTypeSpeculation                        = true                                {C2 product}
  692.      bool UseUTCFileTimestamp                       = true                                {product}
  693.      bool UseUnalignedLoadStores                    = false                               {ARCH product}
  694.      bool UseVMInterruptibleIO                      = false                               {product}
  695.      bool UseXMMForArrayCopy                        = false                               {product}
  696.      bool UseXmmI2D                                 = false                               {ARCH product}
  697.      bool UseXmmI2F                                 = false                               {ARCH product}
  698.      bool UseXmmLoadAndClearUpper                   = true                                {ARCH product}
  699.      bool UseXmmRegToRegMoveAll                     = false                               {ARCH product}
  700.      bool VMThreadHintNoPreempt                     = false                               {product}
  701.      intx VMThreadPriority                          = -1                                  {product}
  702.      intx VMThreadStackSize                         = 0                                   {pd product}
  703.      intx ValueMapInitialSize                       = 11                                  {C1 product}
  704.      intx ValueMapMaxLoopSize                       = 8                                   {C1 product}
  705.      intx ValueSearchLimit                          = 1000                                {C2 product}
  706.      bool VerifyMergedCPBytecodes                   = true                                {product}
  707.      bool VerifySharedSpaces                        = false                               {product}
  708.      intx WorkAroundNPTLTimedWaitHang               = 1                                   {product}
  709.     uintx YoungGenerationSizeIncrement              = 20                                  {product}
  710.     uintx YoungGenerationSizeSupplement             = 80                                  {product}
  711.     uintx YoungGenerationSizeSupplementDecay        = 8                                   {product}
  712.     uintx YoungPLABSize                             = 4096                                {product}
  713.      bool ZeroTLAB                                  = false                               {product}
  714.      intx hashCode                                  = 5                                   {product}

6.3、java -XX: +PrintCommandLineflags 

  1. C:\Users\86136>java  -XX:+PrintCommandLineFlags -version
  2. -XX:InitialHeapSize=266275648 -XX:MaxHeapSize=4260410368 -XX:+PrintCommandLineFlags -XX:+UseCompressedClassPointers -XX:+UseCompressedOops -XX:-UseLargePagesIndividualAllocation -XX:+UseParallelGC
  3. java version "1.8.0_51"
  4. Java(TM) SE Runtime Environment (build 1.8.0_51-b16)
  5. Java HotSpot(TM) 64-Bit Server VM (build 25.51-b03, mixed mode)

 

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