JVM性能调优工具06-jstack-JVM线程栈分析工具

[超级链接:JVM性能调优工具学习记录-序章]

本章主要学习JVM线程栈分析工具jstack。

1.用途

打印JVM线程栈的信息，包括：线程名称、序号、优先级prio、JVM线程id(tid,内部id)、系统线程id(nid)、线程状态、锁状态等。

2.语法xt

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1Usage:

2    jstack [-l] <pid>

3        (to connect to running process)

4    jstack -F [-m] [-l] <pid>

5        (to connect to a hung process)

6    jstack [-m] [-l] <executable> <core>

7        (to connect to a core file)

8    jstack [-m] [-l] [server_id@]<remote server IP or hostname>

9        (to connect to a remote debug server)

10

11Options:

12    -F  to force a thread dump. Use when jstack <pid> does not respond (process is hung)

13    -m  to print both java and native frames (mixed mode)

14    -l  long listing. Prints additional information about locks

15    -h or -help to print this help message

16

• h or help：帮助信息。
• l：打印关于锁的额外信息。
• m：同时打印Java和本地语音的栈信息。
• F：当pid无响应时，强制打印栈信息。

3.常用命令示例

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1C:\Users\hanchao>jstack 7484

22018-05-08 23:53:03

3Full thread dump Java HotSpot(TM) 64-Bit Server VM (25.131-b11 mixed mode):

4

5"DestroyJavaVM" #13 prio=5 os_prio=0 tid=0x00000000047a3800 nid=0x3a8 waiting on condition [0x0000000000000000]

6   java.lang.Thread.State: RUNNABLE

7

8"Thread-1" #12 prio=5 os_prio=0 tid=0x000000001ab7b800 nid=0xe64 waiting on condition [0x000000001bd7f000]

9   java.lang.Thread.State: TIMED_WAITING (sleeping)

10        at java.lang.Thread.sleep(Native Method)

11        at pers.hanchao.concurrent.eg04.ThreadWaitDemo$Restaurant.run(ThreadWaitDemo.java:91)

12        - locked <0x00000000814024f8> (a java.util.LinkedList)

13

14"Thread-0" #11 prio=5 os_prio=0 tid=0x000000001b594800 nid=0x3190 waiting for monitor entry [0x000000001bc7f000]

15   java.lang.Thread.State: BLOCKED (on object monitor)

16        at pers.hanchao.concurrent.eg04.ThreadWaitDemo$Kitchen.run(ThreadWaitDemo.java:53)

17        - waiting to lock <0x00000000814024f8> (a java.util.LinkedList)

18

19"Service Thread" #10 daemon prio=9 os_prio=0 tid=0x000000001a9a3800 nid=0x36e8 runnable [0x0000000000000000]

20   java.lang.Thread.State: RUNNABLE

21

22"C1 CompilerThread2" #9 daemon prio=9 os_prio=2 tid=0x000000001a8fc000 nid=0x2478 waiting on condition [0x0000000000000000]

23   java.lang.Thread.State: RUNNABLE

24

25"C2 CompilerThread1" #8 daemon prio=9 os_prio=2 tid=0x000000001a8a9000 nid=0x3754 waiting on condition [0x0000000000000000]

26   java.lang.Thread.State: RUNNABLE

27

28"C2 CompilerThread0" #7 daemon prio=9 os_prio=2 tid=0x000000001a8a8000 nid=0x3944 waiting on condition [0x0000000000000000]

29   java.lang.Thread.State: RUNNABLE

30

31"Monitor Ctrl-Break" #6 daemon prio=5 os_prio=0 tid=0x000000001a8f2000 nid=0x3460 runnable [0x000000001ae7e000]

32   java.lang.Thread.State: RUNNABLE

33        at java.net.SocketInputStream.socketRead0(Native Method)

34        at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)

35        at java.net.SocketInputStream.read(SocketInputStream.java:171)

36        at java.net.SocketInputStream.read(SocketInputStream.java:141)

37        at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:284)

38        at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:326)

39        at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:178)

40        - locked <0x0000000081410958> (a java.io.InputStreamReader)

41        at java.io.InputStreamReader.read(InputStreamReader.java:184)

42        at java.io.BufferedReader.fill(BufferedReader.java:161)

43        at java.io.BufferedReader.readLine(BufferedReader.java:324)

44        - locked <0x0000000081410958> (a java.io.InputStreamReader)

45        at java.io.BufferedReader.readLine(BufferedReader.java:389)

46        at com.intellij.rt.execution.application.AppMainV2$1.run(AppMainV2.java:64)

47

48"Attach Listener" #5 daemon prio=5 os_prio=2 tid=0x000000001946e800 nid=0x1cf8 waiting on condition [0x0000000000000000]

49   java.lang.Thread.State: RUNNABLE

50

51"Signal Dispatcher" #4 daemon prio=9 os_prio=2 tid=0x000000001a788800 nid=0x1d20 runnable [0x0000000000000000]

52   java.lang.Thread.State: RUNNABLE

53

54"Finalizer" #3 daemon prio=8 os_prio=1 tid=0x00000000193f9000 nid=0x1774 in Object.wait() [0x000000001a77f000]

55   java.lang.Thread.State: WAITING (on object monitor)

56        at java.lang.Object.wait(Native Method)

57        - waiting on <0x0000000081402c60> (a java.lang.ref.ReferenceQueue$Lock)

58        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)

59        - locked <0x0000000081402c60> (a java.lang.ref.ReferenceQueue$Lock)

60        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)

61        at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:209)

62

63"Reference Handler" #2 daemon prio=10 os_prio=2 tid=0x0000000004894000 nid=0x1e08 in Object.wait() [0x000000001a67f000]

64   java.lang.Thread.State: WAITING (on object monitor)

65        at java.lang.Object.wait(Native Method)

66        - waiting on <0x0000000081402e58> (a java.lang.ref.Reference$Lock)

67        at java.lang.Object.wait(Object.java:502)

68        at java.lang.ref.Reference.tryHandlePending(Reference.java:191)

69        - locked <0x0000000081402e58> (a java.lang.ref.Reference$Lock)

70        at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:153)

71

72"VM Thread" os_prio=2 tid=0x00000000193d7000 nid=0x3bc4 runnable

73

74"GC task thread#0 (ParallelGC)" os_prio=0 tid=0x00000000047b9000 nid=0x3230 runnable

75

76"GC task thread#1 (ParallelGC)" os_prio=0 tid=0x00000000047ba800 nid=0xdd0 runnable

77

78"GC task thread#2 (ParallelGC)" os_prio=0 tid=0x00000000047bc000 nid=0x336c runnable

79

80"GC task thread#3 (ParallelGC)" os_prio=0 tid=0x00000000047bd800 nid=0x3428 runnable

81

82"VM Periodic Task Thread" os_prio=2 tid=0x000000001a9b0000 nid=0x1370 waiting on condition

83

84JNI global references: 18

85