查看Linux進程CPU過高具體的線程堆棧(不中斷程式)__Linux

1、TOP命令，找到佔用CPU最高的進程

$ toptop - 20:11:45 up 850 days,  1:18,  3 users,  load average: 1.04, 1.01, 0.99Tasks:  61 total,   1 running,  60 sleeping,   0 stopped,   0 zombieCpu(s):  1.4% us,  0.1% sy,  0.0% ni, 98.3% id,  0.1% wa,  0.0% hi,  0.2% siMem:  16418172k total, 15693376k used,   724796k free,  1146696k buffersSwap: 10223608k total,        0k used, 10223608k free, 12537692k cached  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                                                                24714 ztgame    16   0 1409m 1.2g 4252 S 99.6  7.4   2390:57 IMVChannelServe                                                            1 root      16   0  4772  520  432 S  0.0  0.0   0:03.43 init                                                                       2 root      RT   0     0    0    0 S  0.0  0.0   0:05.75 migration/0                                                                3 root      34  19     0    0    0 S  0.0  0.0   5:22.97 ksoftirqd/0                                                                4 root      RT   0     0    0    0 S  0.0  0.0   0:07.90 migration/1                                                                5 root      34  19     0    0    0 S  0.0  0.0   0:00.27 ksoftirqd/1                                                                6 root      RT   0     0    0    0 S  0.0  0.0   0:04.07 migration/2                                                                7 root      34  19     0    0    0 S  0.0  0.0   0:00.47 ksoftirqd/2                                                                8 root      RT   0     0    0    0 S  0.0  0.0   0:04.00 migration/3                                                                9 root      34  19     0    0    0 S  0.0  0.0   0:00.33 ksoftirqd/3    

2、通過TOP -H -p 進程ID，找到具體的線程佔用情況，Shift+H可以開啟關閉線程顯示

$ top -H -p 24714top - 20:15:30 up 850 days,  1:22,  3 users,  load average: 1.26, 1.09, 1.02Tasks:  16 total,   1 running,  15 sleeping,   0 stopped,   0 zombieCpu(s): 24.8% us,  0.3% sy,  0.0% ni, 73.1% id,  0.0% wa,  0.0% hi,  1.8% siMem:  16418172k total, 15701376k used,   716796k free,  1146704k buffersSwap: 10223608k total,        0k used, 10223608k free, 12546048k cached  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                                                                24729 ztgame    16   0 1409m 1.2g 4252 R 97.0  7.4   2307:22 IMVChannelServe                                                        24721 ztgame    15   0 1409m 1.2g 4252 S  2.0  7.4  84:22.40 IMVChannelServe                                                        24714 ztgame    16   0 1409m 1.2g 4252 S  0.0  7.4   0:03.80 IMVChannelServe                                                        24716 ztgame    15   0 1409m 1.2g 4252 S  0.0  7.4   0:00.00 IMVChannelServe                                                        24717 ztgame    15   0 1409m 1.2g 4252 S  0.0  7.4   0:00.04 IMVChannelServe                                                        24718 ztgame    15   0 1409m 1.2g 4252 S  0.0  7.4   0:00.00 IMVChannelServe                                                        24719 ztgame    15   0 1409m 1.2g 4252 S  0.0  7.4   0:00.08 IMVChannelServe                                                        24720 ztgame    15   0 1409m 1.2g 4252 S  0.0  7.4   0:00.01 IMVChannelServe                                                        24722 ztgame    15   0 1409m 1.2g 4252 S  0.0  7.4   0:00.00 IMVChannelServe                                                        24723 ztgame    16   0 1409m 1.2g 4252 S  0.0  7.4   0:00.00 IMVChannelServe                                                        24724 ztgame    15   0 1409m 1.2g 4252 S  0.0  7.4   0:00.01 IMVChannelServe                                                        24725 ztgame    15   0 1409m 1.2g 4252 S  0.0  7.4   0:09.83 IMVChannelServe                                                        24726 ztgame    15   0 1409m 1.2g 4252 S  0.0  7.4   0:00.00 IMVChannelServe                                                        24727 ztgame    15   0 1409m 1.2g 4252 S  0.0  7.4   0:00.76 IMVChannelServe                                                        24728 ztgame    16   0 1409m 1.2g 4252 S  0.0  7.4   0:00.53 IMVChannelServe                                                        24730 ztgame    16   0 1409m 1.2g 4252 S  0.0  7.4   2:42.18 IMVChannelServe                                                        

3、通過命令pstack 進程ID顯示線程堆棧， LWP 24729對應線程ID的堆棧，就是佔用CPU最高的堆棧，可以具體分析什麼原因造成的。

$ pstack 24714Thread 16 (Thread 1084229984 (LWP 24716)):#0  0x00000039c5a901d5 in __nanosleep_nocancel () from /lib64/tls/libc.so.6#1  0x00000039c5ac3058 in usleep () from /lib64/tls/libc.so.6#2  0x00000000005ebe10 in zVerifyThread::run ()#3  0x00000000005e9d29 in zThread::threadFunc ()#4  0x00000039c6106137 in start_thread () from /lib64/tls/libpthread.so.0#5  0x00000039c5ac9883 in clone () from /lib64/tls/libc.so.6Thread 15 (Thread 1094719840 (LWP 24717)):#0  0x00000039c5a901d5 in __nanosleep_nocancel () from /lib64/tls/libc.so.6#1  0x00000039c5ac3058 in usleep () from /lib64/tls/libc.so.6#2  0x00000000005ebe10 in zVerifyThread::run ()#3  0x00000000005e9d29 in zThread::threadFunc ()#4  0x00000039c6106137 in start_thread () from /lib64/tls/libpthread.so.0#5  0x00000039c5ac9883 in clone () from /lib64/tls/libc.so.6Thread 14 (Thread 1105209696 (LWP 24718)):#0  0x00000039c5a901d5 in __nanosleep_nocancel () from /lib64/tls/libc.so.6#1  0x00000039c5ac3058 in usleep () from /lib64/tls/libc.so.6#2  0x00000000005ebe10 in zVerifyThread::run ()#3  0x00000000005e9d29 in zThread::threadFunc ()#4  0x00000039c6106137 in start_thread () from /lib64/tls/libpthread.so.0#5  0x00000039c5ac9883 in clone () from /lib64/tls/libc.so.6Thread 13 (Thread 1115699552 (LWP 24719)):#0  0x00000039c5a901d5 in __nanosleep_nocancel () from /lib64/tls/libc.so.6#1  0x00000039c5ac3058 in usleep () from /lib64/tls/libc.so.6#2  0x00000000005ebe10 in zVerifyThread::run ()#3  0x00000000005e9d29 in zThread::threadFunc ()#4  0x00000039c6106137 in start_thread () from /lib64/tls/libpthread.so.0#5  0x00000039c5ac9883 in clone () from /lib64/tls/libc.so.6Thread 3 (Thread 1220598112 (LWP 24729)):#0  0x00000039c5a71e87 in memset () from /lib64/tls/libc.so.6#1  0x00000000004fa591 in ChannelTask::forwardToClientByMedia ()#2  0x0000000000506220 in ChannelTask::parseClientMsg_Normal ()#3  0x000000000051ef55 in ChannelTask::parseClientMsg ()#4  0x000000000051f070 in ChannelTask::cmdMsgParse_Forward ()#5  0x000000000051f1d1 in ChannelTask::cmdMsgParse ()#6  0x000000000051f414 in ChannelTask::processCmd ()#7  0x0000000000523ea8 in ChannelTaskManager::processCmd ()#8  0x0000000000525ddd in ChannelTimeTick::run ()#9  0x00000000005e9d29 in zThread::threadFunc ()#10 0x00000039c6106137 in start_thread () from /lib64/tls/libpthread.so.0#11 0x00000039c5ac9883 in clone () from /lib64/tls/libc.so.6Thread 2 (Thread 1231087968 (LWP 24730)):#0  0x00000039c610af8b in __lll_mutex_lock_wait ()#1  0x0000000000000001 in ?? ()#2  0x0000000000000065 in ?? ()#3  0x00000039c6107d87 in pthread_mutex_lock () from /lib64/tls/libpthread.so.0#4  0x0000003a500ae29e in operator delete () from /usr/lib64/libstdc++.so.6#5  0x000000000053f59d in ChannelLoadClient::processCmd_DB ()#6  0x00000000005986c9 in GameAppClient::processTaskCmd_DB ()#7  0x00000039c5a901e3 in __nanosleep_nocancel () from /lib64/tls/libc.so.6#8  0x0000000000000000 in ?? ()Thread 1 (Thread 182894183104 (LWP 24714)):#0  0x00000039c5ac9c5c in epoll_wait () from /lib64/tls/libc.so.6#1  0x0000000000620cac in zTCPServer::accept ()#2  0x00000000005f9c0d in zNetService::serviceCallback ()#3  0x00000000005f89e3 in zService::main ()#4  0x0000000000564298 in main ()