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sun提供的jvm检测工具jstack和jmsp，简单介绍：
jstack命令行工具连接到指定的进程或核心文件，并打印所有连接到虚拟机的线程的堆栈跟踪信息，包括Java 线程和VM 内部线程，有时也包括本地堆栈框架。该工具还执行死锁检测。
用法：jstack [option] pid
参数(Options)：
-F 在-l 不起作用时，强制打印
jstack -l 3805 2011-04-23 20:10:57 Full thread dump OpenJDK Client VM (19.0-b09 mixed mode, sharing): "Process monitor" daemon prio=10 tid=0xad56e400 nid=0x1f52 in Object.wait() [0xac0ad000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) at java.lang.Object.wait(Object.java:502) at java.lang.UNIXProcess.waitFor(UNIXProcess.java:181) - locked <0x644ddec8> (a java.lang.UNIXProcess) at org.eclipse.debug.core.model.RuntimeProcess$ProcessMonitorThread.run(RuntimeProcess.java:417) Locked ownable synchronizers: - None "Input Stream Monitor" daemon prio=10 tid=0xad56d800 nid=0x1f51 in Object.wait() [0xad3f7000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) at java.lang.Object.wait(Object.java:502) at org.eclipse.debug.internal.core.InputStreamMonitor.writeNext(InputStreamMonitor.java:154) - locked <0x64520c28> (a java.lang.Object) at org.eclipse.debug.internal.core.InputStreamMonitor.write(InputStreamMonitor.java:124) at org.eclipse.debug.internal.core.InputStreamMonitor$1.run(InputStreamMonitor.java:99) at java.lang.Thread.run(Thread.java:636) Locked ownable synchronizers: - None "Output Stream Monitor" daemon prio=10 tid=0xabda1400 nid=0x1f50 runnable [0xac38b000] java.lang.Thread.State: RUNNABLE at java.io.FileInputStream.readBytes(Native Method) at java.io.FileInputStream.read(FileInputStream.java:236) at java.io.BufferedInputStream.read1(BufferedInputStream.java:273) at java.io.BufferedInputStream.read(BufferedInputStream.java:334) - locked <0x6451eb48> (a java.io.BufferedInputStream) at java.io.FilterInputStream.read(FilterInputStream.java:107) at org.eclipse.debug.internal.core.OutputStreamMonitor.read(OutputStreamMonitor.java:144) at org.eclipse.debug.internal.core.OutputStreamMonitor.access$1(OutputStreamMonitor.java:134) at org.eclipse.debug.internal.core.OutputStreamMonitor$1.run(OutputStreamMonitor.java:207) at java.lang.Thread.run(Thread.java:636) Locked ownable synchronizers: - None "Output Stream Monitor" daemon prio=10 tid=0xabb8f800 nid=0x1f4f runnable [0xad355000] java.lang.Thread.State: RUNNABLE at java.io.FileInputStream.readBytes(Native Method) at java.io.FileInputStream.read(FileInputStream.java:236) at java.io.BufferedInputStream.read1(BufferedInputStream.java:273) at java.io.BufferedInputStream.read(BufferedInputStream.java:334) - locked <0x644e7128> (a java.io.BufferedInputStream) at java.io.BufferedInputStream.read1(BufferedInputStream.java:273) at java.io.BufferedInputStream.read(BufferedInputStream.java:334) - locked <0x6451caa0> (a java.io.BufferedInputStream) at java.io.FilterInputStream.read(FilterInputStream.java:107) at org.eclipse.debug.internal.core.OutputStreamMonitor.read(OutputStreamMonitor.java:144) at org.eclipse.debug.internal.core.OutputStreamMonitor.access$1(OutputStreamMonitor.java:134) at org.eclipse.debug.internal.core.OutputStreamMonitor$1.run(OutputStreamMonitor.java:207) at java.lang.Thread.run(Thread.java:636) Locked ownable synchronizers: - None "process reaper" daemon prio=10 tid=0xad5da800 nid=0x1f4d runnable [0xac820000] java.lang.Thread.State: RUNNABLE at java.lang.UNIXProcess.waitForProcessExit(Native Method) at java.lang.UNIXProcess.access$900(UNIXProcess.java:36) at java.lang.UNIXProcess$1$1.run(UNIXProcess.java:148) Locked ownable synchronizers: - None "Timer-186" daemon prio=10 tid=0x08311400 nid=0x1f4a in Object.wait() [0xac2a0000] java.lang.Thread.State: TIMED_WAITING (on object monitor) at java.lang.Object.wait(Native Method) at java.util.TimerThread.mainLoop(Timer.java:531) - locked <0x7310a5b0> (a java.util.TaskQueue) at java.util.TimerThread.run(Timer.java:484) Locked ownable synchronizers: - None "org.eclipse.jdt.internal.ui.text.JavaReconciler" daemon prio=10 tid=0x0952dc00 nid=0x1f38 in Object.wait() [0xb4a09000] java.lang.Thread.State: TIMED_WAITING (on object monitor) at java.lang.Object.wait(Native Method) at org.eclipse.jface.text.reconciler.AbstractReconciler$BackgroundThread.run(AbstractReconciler.java:179) - locked <0x7305fe68> (a org.eclipse.jface.text.reconciler.DirtyRegionQueue) Locked ownable synchronizers: - None "Attach Listener" daemon prio=10 tid=0xac15b800 nid=0x1e38 waiting on condition [0x00000000] java.lang.Thread.State: RUNNABLE Locked ownable synchronizers: - None "Java2D Disposer" daemon prio=10 tid=0x08f46000 nid=0x1af9 in Object.wait() [0xad4fe000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:133) - locked <0x7296f588> (a java.lang.ref.ReferenceQueue$Lock) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:149) at sun.java2d.Disposer.run(Disposer.java:143) at java.lang.Thread.run(Thread.java:636) Locked ownable synchronizers: - None "Worker-13" prio=10 tid=0x092d8400 nid=0x1af3 in Object.wait() [0xad684000] java.lang.Thread.State: TIMED_WAITING (on object monitor) at java.lang.Object.wait(Native Method) at org.eclipse.core.internal.jobs.WorkerPool.sleep(WorkerPool.java:185) - locked <0x6e660150> (a org.eclipse.core.internal.jobs.WorkerPool) at org.eclipse.core.internal.jobs.WorkerPool.startJob(WorkerPool.java:230) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:50) Locked ownable synchronizers: - None "Worker-12" prio=10 tid=0xac158400 nid=0x1af2 in Object.wait() [0xac5fe000] java.lang.Thread.State: TIMED_WAITING (on object monitor) at java.lang.Object.wait(Native Method) at org.eclipse.core.internal.jobs.WorkerPool.sleep(WorkerPool.java:185) - locked <0x6e660150> (a org.eclipse.core.internal.jobs.WorkerPool) at org.eclipse.core.internal.jobs.WorkerPool.startJob(WorkerPool.java:230) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:50) Locked ownable synchronizers: - None "Thread-23" daemon prio=10 tid=0xad7dbc00 nid=0xf91 in Object.wait() [0xac2f1000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on <0x714efc80> (a java.lang.ref.ReferenceQueue$Lock) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:133) - locked <0x714efc80> (a java.lang.ref.ReferenceQueue$Lock) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:149) at org.tmatesoft.svn.core.javahl.SVNClientImplTracker.run(SVNClientImplTracker.java:65) at java.lang.Thread.run(Thread.java:636) Locked ownable synchronizers: - None "Dali Event Handler" prio=10 tid=0xb4cf7800 nid=0xf85 in Object.wait() [0xb12c6000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) at java.lang.Object.wait(Object.java:502) at org.eclipse.jpt.utility.internal.SynchronizedQueue.waitUntilEmptyIs_(SynchronizedQueue.java:138) at org.eclipse.jpt.utility.internal.SynchronizedQueue.waitUntilEmptyIs(SynchronizedQueue.java:129) - locked <0x70ea3d70> (a org.eclipse.jpt.utility.internal.SynchronizedQueue) at org.eclipse.jpt.utility.internal.SynchronizedQueue.waitUntilNotEmpty(SynchronizedQueue.java:153) at org.eclipse.jpt.utility.internal.AsynchronousCommandExecutor$Consumer.waitForProducer(AsynchronousCommandExecutor.java:156) at org.eclipse.jpt.utility.internal.ConsumerThreadCoordinator$RunnableConsumer.run(ConsumerThreadCoordinator.java:199) at java.lang.Thread.run(Thread.java:636) Locked ownable synchronizers: - None "Worker-9" prio=10 tid=0x08dd7400 nid=0xf83 in Object.wait() [0xac24f000] java.lang.Thread.State: TIMED_WAITING (on object monitor) at java.lang.Object.wait(Native Method) at org.eclipse.core.internal.jobs.WorkerPool.sleep(WorkerPool.java:185) - locked <0x6e660150> (a org.eclipse.core.internal.jobs.WorkerPool) at org.eclipse.core.internal.jobs.WorkerPool.startJob(WorkerPool.java:230) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:50) Locked ownable synchronizers: - None "JavaScript indexing" daemon prio=10 tid=0xabb23800 nid=0xf5d in Object.wait() [0xac0fe000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on <0x70a9cb40> (a org.eclipse.wst.jsdt.internal.core.search.indexing.IndexManager) at java.lang.Object.wait(Object.java:502) at org.eclipse.wst.jsdt.internal.core.search.processing.JobManager.run(JobManager.java:370) - locked <0x70a9cb40> (a org.eclipse.wst.jsdt.internal.core.search.indexing.IndexManager) at java.lang.Thread.run(Thread.java:636) Locked ownable synchronizers: - None "com.google.inject.internal.util.$Finalizer" daemon prio=10 tid=0x088e0000 nid=0xf54 in Object.wait() [0xb1525000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on <0x6f507b68> (a java.lang.ref.ReferenceQueue$Lock) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:133) - locked <0x6f507b68> (a java.lang.ref.ReferenceQueue$Lock) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:149) at com.google.inject.internal.util.$Finalizer.run(Finalizer.java:144) at java.lang.Thread.run(Thread.java:636) Locked ownable synchronizers: - None "Timer-0" daemon prio=10 tid=0x085cbc00 nid=0xf44 in Object.wait() [0xac3fe000] java.lang.Thread.State: TIMED_WAITING (on object monitor) at java.lang.Object.wait(Native Method) at java.util.TimerThread.mainLoop(Timer.java:531) - locked <0x6f316880> (a java.util.TaskQueue) at java.util.TimerThread.run(Timer.java:484) Locked ownable synchronizers: - None "Worker-5" prio=10 tid=0x08870400 nid=0xf34 waiting on condition [0xb125d000] java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x6ef90e68> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186) at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043) at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:386) at org.eclipse.epp.usagedata.internal.gathering.services.UsageDataService.getQueuedEvent(UsageDataService.java:222) at org.eclipse.epp.usagedata.internal.gathering.services.UsageDataService.access$0(UsageDataService.java:220) at org.eclipse.epp.usagedata.internal.gathering.services.UsageDataService$1.run(UsageDataService.java:155) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54) Locked ownable synchronizers: - None "Worker-3" prio=10 tid=0x08c6b800 nid=0xf32 in Object.wait() [0xac7ad000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) at java.lang.Object.wait(Object.java:502) at org.eclipse.ui.console.IOConsoleInputStream.waitForData(IOConsoleInputStream.java:147) at org.eclipse.ui.console.IOConsoleInputStream.read(IOConsoleInputStream.java:92) - locked <0x645660a8> (a org.eclipse.ui.console.IOConsoleInputStream) at org.eclipse.ui.console.IOConsoleInputStream.read(IOConsoleInputStream.java:117) at org.eclipse.debug.internal.ui.views.console.ProcessConsole$InputReadJob.run(ProcessConsole.java:678) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54) Locked ownable synchronizers: - None "Worker-2" prio=10 tid=0x08c50400 nid=0xf31 in Object.wait() [0xb15b3000] java.lang.Thread.State: TIMED_WAITING (on object monitor) at java.lang.Object.wait(Native Method) at org.eclipse.core.internal.jobs.WorkerPool.sleep(WorkerPool.java:185) - locked <0x6e660150> (a org.eclipse.core.internal.jobs.WorkerPool) at org.eclipse.core.internal.jobs.WorkerPool.startJob(WorkerPool.java:230) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:50) Locked ownable synchronizers: - None "[ThreadPool Manager] - Idle Thread" daemon prio=10 tid=0x087cfc00 nid=0xefd in Object.wait() [0xb1115000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) at java.lang.Object.wait(Object.java:502) at org.eclipse.equinox.internal.util.impl.tpt.threadpool.Executor.run(Executor.java:106) - locked <0x6eee76b0> (a org.eclipse.equinox.internal.util.impl.tpt.threadpool.Executor) Locked ownable synchronizers: - None "Bundle File Closer" daemon prio=10 tid=0x088fb800 nid=0xefc in Object.wait() [0xb11d6000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) at java.lang.Object.wait(Object.java:502) at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.getNextEvent(EventManager.java:397) - locked <0x6ee7c6e0> (a org.eclipse.osgi.framework.eventmgr.EventManager$EventThread) at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:333) Locked ownable synchronizers: - None "Java indexing" daemon prio=10 tid=0x088a8000 nid=0xefb in Object.wait() [0xb1317000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) at java.lang.Object.wait(Object.java:502) at org.eclipse.jdt.internal.core.search.processing.JobManager.run(JobManager.java:381) - locked <0x6ece1ca0> (a org.eclipse.jdt.internal.core.search.indexing.IndexManager) at java.lang.Thread.run(Thread.java:636) Locked ownable synchronizers: - None "Worker-JM" prio=10 tid=0xb4cae000 nid=0xef6 in Object.wait() [0xb4967000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) at org.eclipse.core.internal.jobs.InternalWorker.run(InternalWorker.java:58) - locked <0x6e6602c8> (a java.util.ArrayList) Locked ownable synchronizers: - None "[Timer] - Main Queue Handler" daemon prio=10 tid=0xb4c99800 nid=0xef5 in Object.wait() [0xb49b8000] java.lang.Thread.State: TIMED_WAITING (on object monitor) at java.lang.Object.wait(Native Method) at org.eclipse.equinox.internal.util.impl.tpt.timer.TimerImpl.run(TimerImpl.java:141) - locked <0x6e660348> (a java.lang.Object) at java.lang.Thread.run(Thread.java:636) Locked ownable synchronizers: - None "Framework Event Dispatcher" daemon prio=10 tid=0xb4c84800 nid=0xef3 in Object.wait() [0xb4a5a000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) at java.lang.Object.wait(Object.java:502) at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.getNextEvent(EventManager.java:397) - locked <0x6e6603b0> (a org.eclipse.osgi.framework.eventmgr.EventManager$EventThread) at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:333) Locked ownable synchronizers: - None "Start Level Event Dispatcher" daemon prio=10 tid=0x082b0c00 nid=0xef2 in Object.wait() [0xb4aab000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on <0x6e5304f8> (a org.eclipse.osgi.framework.eventmgr.EventManager$EventThread) at java.lang.Object.wait(Object.java:502) at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.getNextEvent(EventManager.java:397) - locked <0x6e5304f8> (a org.eclipse.osgi.framework.eventmgr.EventManager$EventThread) at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:333) Locked ownable synchronizers: - None "State Data Manager" daemon prio=10 tid=0x082f2000 nid=0xef1 waiting on condition [0xb4afc000] java.lang.Thread.State: TIMED_WAITING (sleeping) at java.lang.Thread.sleep(Native Method) at org.eclipse.osgi.internal.baseadaptor.StateManager.run(StateManager.java:319) at java.lang.Thread.run(Thread.java:636) Locked ownable synchronizers: - None "Low Memory Detector" daemon prio=10 tid=0x08274800 nid=0xeef runnable [0x00000000] java.lang.Thread.State: RUNNABLE Locked ownable synchronizers: - None "CompilerThread0" daemon prio=10 tid=0x08271c00 nid=0xeee waiting on condition [0x00000000] java.lang.Thread.State: RUNNABLE Locked ownable synchronizers: - None "Signal Dispatcher" daemon prio=10 tid=0x08270400 nid=0xeed runnable [0x00000000] java.lang.Thread.State: RUNNABLE Locked ownable synchronizers: - None "Finalizer" daemon prio=10 tid=0x0826cc00 nid=0xeec in Object.wait() [0xb4e40000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:133) - locked <0x6e360358> (a java.lang.ref.ReferenceQueue$Lock) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:149) at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:177) Locked ownable synchronizers: - None "Reference Handler" daemon prio=10 tid=0x08268000 nid=0xeeb in Object.wait() [0xb4e91000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) at java.lang.Object.wait(Object.java:502) at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:133) - locked <0x6e360098> (a java.lang.ref.Reference$Lock) Locked ownable synchronizers: - None "main" prio=10 tid=0x08239400 nid=0xedd runnable [0xbfc83000] java.lang.Thread.State: RUNNABLE at org.eclipse.swt.internal.gtk.OS.Call(Native Method) at org.eclipse.swt.widgets.Display.sleep(Display.java:4021) at org.eclipse.ui.application.WorkbenchAdvisor.eventLoopIdle(WorkbenchAdvisor.java:364) at org.eclipse.ui.internal.ide.application.IDEWorkbenchAdvisor.eventLoopIdle(IDEWorkbenchAdvisor.java:887) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2641) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438) at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:664) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:115) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:369) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:616) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:620) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:575) at org.eclipse.equinox.launcher.Main.run(Main.java:1408) Locked ownable synchronizers: - None "VM Thread" prio=10 tid=0x08266400 nid=0xeea runnable "VM Periodic Task Thread" prio=10 tid=0x08276c00 nid=0xef0 waiting on condition JNI global references: 2009这种方法可以查看是否存在死锁，当然kill -3 pid也可以的。
试用方法：
jmap [ option ] pid
jmap [ option ] executable core
jmap [ option ] [server-id@]remote-hostname-or-IP
参数说明：
option
可选的命令参数
pid
线程id
executable
Java executable from which the core dump was produced.
(可能是产生core dump的java可执行程序)
core
将被打印信息的core dump文件
remote-hostname-or-IP
远程debug服务的主机名或ip
server-id
唯一id,假如一台主机上多个远程debug服务
option 参数描述
-dump:[live,]format=b,file=
输出jvm的heap内容到文件,并使用hprof二进制形式. live子选项如果指定,那么只输出活的对象到文件.
-finalizerinfo
打印正等待回收的对象的信息
-histo[:live]
打印每个class的实例数量,内存占用,类全名信息. VM的内部类名字开头会加上前缀”*”. 假如live子参数加上后,只统计活的对象数量.
-permstat
打印classload和jvm heap持久层的信息. 包括每个classloader的名字,活跃性,地址,父classloader和加载的class数目. 另外,内部String的数量和占用内存数也会打印出来.
-F
强制.在pid没有相应的时候使用-dump或者-histo参数. 在这个模式下,live子参数无效.
-h | -help
打印帮助信息
-J
传递参数给jmap启动的jvm.
zhutao@zhutao-ThinkPad-SL:~$ jmap -histo 3805
num #instances #bytes class name
----------------------------------------------
1: 460608 43696072 [C
2: 223150 32302936 <constMethodKlass>
3: 354365 18073432 <symbolKlass>
4: 223150 17868632 <methodKlass>
5: 125718 16314024 [I
6: 22533 14251960 <constantPoolKlass>
7: 109146 12854440 [B
8: 22533 10488912 <instanceKlassKlass>
9: 391794 9403056 java.lang.String
10: 18558 8119504 <constantPoolCacheKlass>
11: 127959 5720464 [Ljava.lang.Object;
12: 183635 4407240 java.util.HashMap$Entry
13: 33719 4222864 [Ljava.util.HashMap$Entry;
14: 93165 2981280 org.apache.xerces.dom.AttrImpl
15: 33609 2483264 [S
16: 24171 2320416 java.lang.Class
17: 41104 1972992 org.apache.xerces.dom.ElementImpl
18: 5784 1608448 [Lorg.eclipse.ui.views.markers.internal.MarkerType;
19: 36174 1537464 [[I
20: 49147 1179528 org.eclipse.equinox.internal.p2.metadata.OSGiVersion
21: 25175 1007000 java.util.HashMap
22: 41107 986568 java.util.ArrayList
23: 30309 969888 java.util.LinkedHashMap$Entry
24: 40040 960960 java.util.Vector
25: 35308 847392 org.apache.xerces.dom.AttributeMap
26: 26437 845984 org.eclipse.equinox.internal.p2.metadata.RequiredCapability
27: 20354 840960 [Ljava.lang.String;
28: 35031 840744 java.util.Hashtable$Entry
29: 34184 820416 java.util.ArrayList$Itr
30: 8814 809720 [[C
31: 10126 676048 [Ljava.util.Hashtable$Entry;
32: 26839 644136 org.eclipse.equinox.internal.p2.metadata.ProvidedCapability
33: 1638 537264 <objArrayKlassKlass>
34: 28872 461952 org.eclipse.equinox.internal.p2.metadata.expression.MatchExpression
35: 10036 401440 java.util.WeakHashMap$Entry
36: 24684 394944 org.eclipse.jdt.internal.ui.text.spelling.engine.AbstractSpellDictionary$ByteArrayWrapper
37: 6977 390712 org.jboss.tools.common.meta.impl.XAttributeImpl
38: 7008 336384 java.util.LinkedHashMap
39: 4388 315936 java.lang.reflect.Field
40: 6303 302544 java.util.Properties
41: 17642 282272 java.lang.Integer
42: 11230 269520 java.lang.ref.WeakReference
43: 3329 266320 java.lang.reflect.Method
44: 4992 239616 org.eclipse.ui.internal.handlers.HandlerActivation
接下来简单介绍下jps和jtrace。
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发表评论
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读写自旋锁详解，第 3 部分
2011-08-29 12:25 856引用：http://www.ibm.com/develope ... -
读写自旋锁详解，第 1 部分
2011-08-29 12:22 1073引用：http://www.ibm.com/d ... -
des和3Des加密算法实现
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