linux 如何查看进程的线程数?
如何查看当前进程有多少个存活线程呢?可以使用系统自动的top查看也可以使用其他的专门工具查看。下面以zookeeper的进程做例子查看线程(ID 5806)方法1:pstree -p 5806(进程ID)。如下截图所示:[root@k8s-m1 ~]# ps -ef | grep zookroot265126180 14:35 pts/200:00:00 grep --color=auto zoo
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如何查看当前进程有多少个存活线程呢?可以使用系统自动的top查看也可以使用其他的专门工具查看。下面以zookeeper的进程做例子查看线程(ID 5806)
- 方法1:
pstree -p 5806(进程ID)。如下截图所示:
[root@k8s-m1 ~]# ps -ef | grep zook
root 2651 2618 0 14:35 pts/2 00:00:00 grep --color=auto zook
root 5806 1 0 2019 ? 1-04:03:42 java -Dzookeeper.log.dir=. -Dzookeeper.root.logger=INFO,CONSOLE -cp /opt/zookeeper/zookeeper-3.4.6/bin/../build/classes:/opt/zookeeper/zookeeper-3.4.6/bin/../build/lib/*.jar:/opt/zookeeper/zookeeper-3.4.6/bin/../lib/slf4j-log4j12-1.6.1.jar:/opt/zookeeper/zookeeper-3.4.6/bin/../lib/slf4j-api-1.6.1.jar:/opt/zookeeper/zookeeper-3.4.6/bin/../lib/netty-3.7.0.Final.jar:/opt/zookeeper/zookeeper-3.4.6/bin/../lib/log4j-1.2.16.jar:/opt/zookeeper/zookeeper-3.4.6/bin/../lib/jline-0.9.94.jar:/opt/zookeeper/zookeeper-3.4.6/bin/../zookeeper-3.4.6.jar:/opt/zookeeper/zookeeper-3.4.6/bin/../src/java/lib/*.jar:/opt/zookeeper/zookeeper-3.4.6/bin/../conf: -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.local.only=false org.apache.zookeeper.server.quorum.QuorumPeerMain /opt/zookeeper/zookeeper-3.4.6/bin/../conf/zoo.cfg
[root@k8s-m1 ~]#
[root@k8s-m1 ~]#
[root@k8s-m1 ~]# pstree -p 5806
java(5806)─┬─{java}(5809)
├─{java}(5810)
├─{java}(5811)
├─{java}(5812)
├─{java}(5813)
├─{java}(5814)
├─{java}(5815)
├─{java}(5816)
├─{java}(5817)
├─{java}(5818)
├─{java}(5829)
├─{java}(5830)
├─{java}(5831)
├─{java}(5832)
├─{java}(5834)
├─{java}(5835)
└─{java}(5836)
- 方法2:查看进程的系统文件(进程ID 5806)
[root@k8s-m1 ~]# cat /proc/5806/status
Name: java
State: S (sleeping)
Tgid: 5806
Ngid: 0
Pid: 5806
PPid: 1
TracerPid: 0
Uid: 0 0 0 0
Gid: 0 0 0 0
FDSize: 256
Groups: 0
VmPeak: 2138728 kB
VmSize: 2137972 kB
VmLck: 0 kB
VmPin: 0 kB
VmHWM: 314960 kB
VmRSS: 81196 kB
VmData: 1946632 kB
VmStk: 136 kB
VmExe: 4 kB
VmLib: 21068 kB
VmPTE: 964 kB
VmSwap: 40680 kB
Threads: 18
SigQ: 0/7288
SigPnd: 0000000000000000
ShdPnd: 0000000000000000
SigBlk: 0000000000000000
SigIgn: 0000000000000003
SigCgt: 2000000181005ccc
CapInh: 0000000000000000
CapPrm: 0000001fffffffff
CapEff: 0000001fffffffff
CapBnd: 0000001fffffffff
Seccomp: 0
Cpus_allowed: 3
Cpus_allowed_list: 0-1
Mems_allowed: 00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000001
Mems_allowed_list: 0
voluntary_ctxt_switches: 56
nonvoluntary_ctxt_switches: 34
Threads: 18 就是是该进程的线程数
- 方法3:top -p 5806(进程ID),然后按H。
Threads: 18 total, 0 running, 18 sleeping, 0 stopped, 0 zombie
%Cpu(s): 3.0 us, 1.2 sy, 0.0 ni, 95.6 id, 0.0 wa, 0.0 hi, 0.0 si, 0.2 st
KiB Mem : 1884000 total, 115544 free, 631080 used, 1137376 buff/cache
KiB Swap: 2097148 total, 1955724 free, 141424 used. 1007888 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
5806 root 20 0 2137972 81196 5132 S 0.0 4.3 0:00.01 java
5809 root 20 0 2137972 81196 5132 S 0.0 4.3 0:01.39 java
5810 root 20 0 2137972 81196 5132 S 0.0 4.3 4:30.45 java
5811 root 20 0 2137972 81196 5132 S 0.0 4.3 4:30.16 java
5812 root 20 0 2137972 81196 5132 S 0.0 4.3 21:35.39 java
5813 root 20 0 2137972 81196 5132 S 0.0 4.3 0:00.09 java
5814 root 20 0 2137972 81196 5132 S 0.0 4.3 0:00.02 java
5815 root 20 0 2137972 81196 5132 S 0.0 4.3 0:00.00 java
5816 root 20 0 2137972 81196 5132 S 0.0 4.3 0:05.06 java
5817 root 20 0 2137972 81196 5132 S 0.0 4.3 0:05.79 java
5818 root 20 0 2137972 81196 5132 S 0.0 4.3 0:00.00 java
5829 root 20 0 2137972 81196 5132 S 0.0 4.3 0:00.00 java
5830 root 20 0 2137972 81196 5132 S 0.0 4.3 399:34.59 java
5831 root 20 0 2137972 81196 5132 S 0.0 4.3 0:02.42 java
5832 root 20 0 2137972 81196 5132 S 0.0 4.3 505:20.46 java
5834 root 20 0 2137972 81196 5132 S 0.0 4.3 13:30.68 java
5835 root 20 0 2137972 81196 5132 S 0.0 4.3 576:26.72 java
5836 root 20 0 2137972 81196 5132 S 0.0 4.3 157:57.50 java
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