linux查看某个进程CPU消耗较高的具体线程或程序的方法

目前我们的监控，可以发现消耗较高CPU的进程（阀值为3个CPU），通过监控我们可以找到消耗较高CPU的进程号；

通过进程号pid，我们在linux上可以通过top –H –p <pid>命令，显示该进程中每个线程的CPU资源消耗情况。

 

然后通过threadump命令，可以打印出某个应用JVM中某时刻所有线程的调用情况，通过线程号我们就可以对应找到线程调用的程序了。

 

另：

使用jrcmd命令也可以进行threadump和进程执行线程情况的查看，但该命令为jrockit 5.0 新带的命令，在wls81用户下，我们没有执行权限，但可以联系中间件帮忙执行。

1. 进入到jrockit/bin目录下
2. 打./jrcmd 回车,会看到当前所有在执行中的java进程的PID号
3. 打./jrcmd [PID] help 回车,会看到指定java进程支持的操作
4. 打./jrcmd [PID] print_threads > xxxFile,可以把当前java进程中的所有线程堆栈轨迹打印到指定文件中

 

 

示例：

[serviceop@CNSZ031330 wls]$ top

   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                                                                   

228961 wls81     15   0  714m 637m 1804 S 755.7  0.2 383:24.53 java   

 

 

[serviceop@CNSZ031330 wls]$ top -H -p 228961

top - 13:37:01 up 156 days, 16:11,  8 users,  load average: 14.24, 13.82, 12.88

Tasks: 140 total,  23 running, 117 sleeping,   0 stopped,   0 zombie

Cpu(s): 25.6%us,  1.6%sy,  0.0%ni, 72.6%id,  0.0%wa,  0.0%hi,  0.2%si,  0.0%st

Mem:  264120292k total, 217896772k used, 46223520k free,  4547804k buffers

Swap:  3145720k total,      464k used,  3145256k free, 153619224k cached

 

   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                                                                   

229077 wls81     15   0  714m 637m 1804 R 32.6  0.2   7:11.79 ExecuteThread:                                                            

229093 wls81     15   0  714m 637m 1804 R 32.6  0.2  23:41.47 ExecuteThread:                                                             

229073 wls81     15   0  714m 637m 1804 R 32.2  0.2   2:24.30 ExecuteThread:                                                            

229076 wls81     15   0  714m 637m 1804 R 32.2  0.2   2:22.75 ExecuteThread:                                                             

229078 wls81     15   0  714m 637m 1804 R 32.2  0.2   7:21.38 ExecuteThread:                                                            

229082 wls81     15   0  714m 637m 1804 R 32.2  0.2  10:14.74 ExecuteThread:                                                            

229084 wls81     15   0  714m 637m 1804 R 32.2  0.2   8:43.72 ExecuteThread:                                                             

229085 wls81     15   0  714m 637m 1804 R 32.2  0.2  12:45.62 ExecuteThread:                                                            

229087 wls81     15   0  714m 637m 1804 R 32.2  0.2  19:11.79 ExecuteThread:                                                             

229089 wls81     15   0  714m 637m 1804 R 32.2  0.2  23:22.67 ExecuteThread:                                                            

229075 wls81     15   0  714m 637m 1804 R 31.9  0.2   5:06.52 ExecuteThread:                                                             

229088 wls81     15   0  714m 637m 1804 R 31.9  0.2  13:19.55 ExecuteThread:                                                            

229090 wls81     15   0  714m 637m 1804 R 31.9  0.2  23:53.55 ExecuteThread:                                                            

229092 wls81     15   0  714m 637m 1804 R 31.9  0.2  24:20.10 ExecuteThread:                                                            

229094 wls81     15   0  714m 637m 1804 R 31.9  0.2  33:25.41 ExecuteThread:                                                            

229095 wls81     15   0  714m 637m 1804 R 31.9  0.2  33:41.20 ExecuteThread:                                                            

229096 wls81     15   0  714m 637m 1804 R 31.9  0.2  36:22.72 ExecuteThread:                                                            

229081 wls81     15   0  714m 637m 1804 R 31.6  0.2   7:28.80 ExecuteThread:                                                             

229083 wls81     15   0  714m 637m 1804 R 31.6  0.2  11:05.48 ExecuteThread:                                                            

229086 wls81     15   0  714m 637m 1804 R 31.6  0.2  11:40.36 ExecuteThread:                                                             

229091 wls81     15   0  714m 637m 1804 R 31.6  0.2  17:53.92 ExecuteThread:                                                            

229097 wls81     15   0  714m 637m 1804 R 31.6  0.2  32:41.28 ExecuteThread:                                                             

229079 wls81     15   0  714m 637m 1804 R 31.2  0.2   7:33.44 ExecuteThread:                                                             

229080 wls81     15   0  714m 637m 1804 S  1.3  0.2   0:14.13 ExecuteThread:                                                            

228963 wls81     15   0  714m 637m 1804 S  0.7  0.2   0:13.44 (GC Main Thread                                                           

229070 wls81     15   0  714m 637m 1804 S  0.7  0.2   0:05.97 ExecuteThread:                                                            

229664 wls81     15   0  714m 637m 1804 S  0.7  0.2   0:08.69 pool-1-thread-7         

 

 

Threadump信息片段：

 

229083：

"ExecuteThread: '35' for queue: 'weblogic.kernel.Default'" id=44 idx=0xd4 tid=229083 prio=5 alive, daemon

    at java/util/HashMap.get(HashMap.java:319)

    at com/paic/abbs/biz/service/common/impl/HardCodeServiceImpl.getString(HardCodeServiceImpl.java:115)

    at com/paic/abbs/biz/service/util/impl/UtilServicesImpl.isExpected(UtilServicesImpl.java:45)

    at com/paic/abbs/biz/service/common/impl/AbbsInternetServiceImpl.policyIssuing(AbbsInternetServiceImpl.java:3156)

    at com/paic/abbs/biz/service/common/impl/AbbsInternetServiceImpl.procRequest(AbbsInternetServiceImpl.java:218)

    at com/paic/abbs/biz/service/common/impl/AbbsInternetServiceImpl.handleRequest(AbbsInternetServiceImpl.java:122)

    at com/paic/abbs/biz/service/common/impl/AbbsInternetService_gwxgqo_EOImpl.handleRequest(AbbsInternetService_gwxgqo_EOImpl.java:262)

    at sun/reflect/GeneratedMethodAccessor287.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;(Unknown Source)

    at sun/reflect/DelegatingMethodAccessorImpl.invoke(DelegatingMethodA