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  • java cpu load


    $ps -Lp 179093 cu | more

    USER        PID    LWP %CPU NLWP %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
    admin    179093 179093  0.0  383 54.5 5803448 4572012 ?     Sl   Aug05   0:00 java
    admin    179093 179097  0.0  383 54.5 5803448 4572012 ?     Sl   Aug05   0:01 java
    admin    179093 179100  0.0  383 54.5 5803448 4572012 ?     Sl   Aug05   8:43 java
    admin    179093 179101  0.0  383 54.5 5803448 4572012 ?     Sl   Aug05   8:43 java
    admin    179093 179102  0.0  383 54.5 5803448 4572012 ?     Sl   Aug05   8:44 java
    admin    179093 179103  0.0  383 54.5 5803448 4572012 ?     Sl   Aug05   8:45 java
    admin    179093 179104  0.0  383 54.5 5803448 4572012 ?     Sl   Aug05   2:21 java
    admin    179093 179105  0.0  383 54.5 5803448 4572012 ?     Sl   Aug05  55:50 java
    admin    179093 179106  0.0  383 54.5 5803448 4572012 ?     Sl   Aug05   0:03 java
    admin    179093 179107  0.0  383 54.5 5803448 4572012 ?     Sl   Aug05   0:15 java
    admin    179093 179108  0.0  383 54.5 5803448 4572012 ?     Sl   Aug05   0:00 java
    admin    179093 179109  0.0  383 54.5 5803448 4572012 ?     Sl   Aug05   0:00 java
    admin    179093 179110  0.0  383 54.5 5803448 4572012 ?     Sl   Aug05   1:02 java
    admin    179093 179111  0.0  383 54.5 5803448 4572012 ?     Sl   Aug05   0:58 java
    admin    179093 179112  0.0  383 54.5 5803448 4572012 ?     Sl   Aug05   0:00 java
    admin    179093 179113  0.0  383 54.5 5803448 4572012 ?     Sl   Aug05  29:21 java
    
    ......
    

    $printf "%x " 179105
    2bba1


    $jstack -l 179093 > jstack.log
    $vi jstack.log

    search 2bba1

    "Reference Handler" daemon prio=10 tid=0x00002aaaab073800 nid=0x2bba2 in Object.wait() [0x00000000405cd000]
       java.lang.Thread.State: WAITING (on object monitor)
            at java.lang.Object.wait(Native Method)
            at java.lang.Object.wait(Object.java:503)
            at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:133)
            - locked <0x0000000772d40fd8> (a java.lang.ref.Reference$Lock)
    
       Locked ownable synchronizers:
            - None
    
    "main" prio=10 tid=0x00002aaaab072000 nid=0x2bb99 runnable [0x0000000041e45000]
       java.lang.Thread.State: RUNNABLE
            at java.net.PlainSocketImpl.socketAccept(Native Method)
            at java.net.AbstractPlainSocketImpl.accept(AbstractPlainSocketImpl.java:398)
            at java.net.ServerSocket.implAccept(ServerSocket.java:530)
            at java.net.ServerSocket.accept(ServerSocket.java:498)
            at org.apache.catalina.core.StandardServer.await(StandardServer.java:466)
            at org.apache.catalina.startup.Catalina.await(Catalina.java:787)
            at org.apache.catalina.startup.Catalina.start(Catalina.java:733)
            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:606)
            at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:320)
            at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:454)
    
       Locked ownable synchronizers:
            - None
    
    "VM Thread" prio=10 tid=0x00002aaaab10d000 nid=0x2bba1 runnable
    
    "Gang worker#0 (Parallel GC Threads)" prio=10 tid=0x00002aaaab108800 nid=0x2bb9c runnable
    
    "Gang worker#1 (Parallel GC Threads)" prio=10 tid=0x00002aaaab109800 nid=0x2bb9d runnable
    
    "Gang worker#2 (Parallel GC Threads)" prio=10 tid=0x00002aaaab10a000 nid=0x2bb9e runnable
    
    "Gang worker#3 (Parallel GC Threads)" prio=10 tid=0x00002aaaab10a800 nid=0x2bb9f runnable
    
    "Concurrent Mark-Sweep GC Thread" prio=10 tid=0x00002aaaab10c000 nid=0x2bba0 runnable
    "VM Periodic Task Thread" prio=10 tid=0x00002aaaab10d800 nid=0x2bba9 waiting on condition
    
    JNI global references: 343
    
    ......
    

    here is a script:

    #!/bin/sh 
    # write by    : oldmanpushcart@gmail.com 
    # date        : 2014-01-16 
    # version     : 0.07 
    typeset top=${1:-10} 
    typeset pid=${2:-$(pgrep -u $USER java)} 
    typeset tmp_file=/tmp/java_${pid}_$$.trace 
    
    /opt/taobao/java/bin/jstack $pid > $tmp_file 
    ps H -eo user,pid,ppid,tid,time,%cpu --sort=%cpu --no-headers 
            | tail -$top 
            | awk -v "pid=$pid" '$2==pid{print $4"	"$6}' 
            | while read line; 
    do 
            typeset nid=$(echo "$line"|awk '{printf("0x%x",$1)}') 
            typeset cpu=$(echo "$line"|awk '{print $2}') 
            awk -v "cpu=$cpu" '/nid='"$nid"'/,/^$/{print $0"	"(isF++?"":"cpu="cpu"%");}' $tmp_file 
    done 
    
    rm -f $tmp_file
    
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  • 原文地址:https://www.cnblogs.com/kylindai/p/5922500.html
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