linux：查看线程的常用命令 (centos 8)
Posted 刘宏缔的架构森林
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一，pidstat 查看某个进程下的所有线程
例：
[lhdop@blog ~]$ pidstat -t -p 20756 Linux 4.18.0-80.11.2.el8_0.x86_64 (blog) 03/20/2022 _x86_64_ (4 CPU) 01:38:44 PM UID TGID TID %usr %system %guest %wait %CPU CPU Command 01:38:44 PM 1000 20756 - 0.00 0.00 0.00 0.00 0.00 1 java 01:38:44 PM 1000 - 20756 0.00 0.00 0.00 0.00 0.00 1 |__java 01:38:44 PM 1000 - 20757 0.00 0.00 0.00 0.00 0.00 0 |__java 01:38:44 PM 1000 - 20758 0.00 0.00 0.00 0.00 0.00 1 |__GC Thread#0 01:38:44 PM 1000 - 20759 0.00 0.00 0.00 0.00 0.00 2 |__G1 Main Marker 01:38:44 PM 1000 - 20760 0.00 0.00 0.00 0.00 0.00 0 |__G1 Conc#0 01:38:44 PM 1000 - 20761 0.00 0.00 0.00 0.00 0.00 1 |__G1 Refine#0 01:38:44 PM 1000 - 20762 0.00 0.00 0.00 0.00 0.00 3 |__G1 Young RemSet 01:38:44 PM 1000 - 20763 0.00 0.00 0.00 0.00 0.00 2 |__VM Thread 01:38:44 PM 1000 - 20764 0.00 0.00 0.00 0.00 0.00 3 |__Reference Handl 01:38:44 PM 1000 - 20765 0.00 0.00 0.00 0.00 0.00 1 |__Finalizer 01:38:44 PM 1000 - 20766 0.00 0.00 0.00 0.00 0.00 1 |__Signal Dispatch 01:38:44 PM 1000 - 20767 0.00 0.00 0.00 0.00 0.00 0 |__Service Thread …
参数说明:
-t Also display statistics for threads associated with selected tasks. This option adds the following values to the reports: TGID The identification number of the thread group leader. TID The identification number of the thread being monitored.
说明：刘宏缔的架构森林是一个专注架构的博客，地址：https://www.cnblogs.com/architectforest
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说明：作者:刘宏缔 邮箱: 371125307@qq.com
二，top查看某个进程下的线程:
[lhdop@blog ~]$ top -H -p 20756 top - 21:33:13 up 800 days, 11:29, 3 users, load average: 0.05, 0.23, 0.46 Threads: 44 total, 0 running, 44 sleeping, 0 stopped, 0 zombie %Cpu(s): 1.7 us, 0.1 sy, 0.0 ni, 98.2 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st MiB Mem : 15355.3 total, 406.0 free, 2331.6 used, 12617.6 buff/cache MiB Swap: 0.0 total, 0.0 free, 0.0 used. 12695.1 avail Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 20756 lhdop 20 0 7766336 354944 28800 S 0.0 2.3 0:00.00 java 20757 lhdop 20 0 7766336 354944 28800 S 0.0 2.3 0:04.29 java 20758 lhdop 20 0 7766336 354944 28800 S 0.0 2.3 0:00.16 GC Thread#0 20759 lhdop 20 0 7766336 354944 28800 S 0.0 2.3 0:00.00 G1 Main Marker 20760 lhdop 20 0 7766336 354944 28800 S 0.0 2.3 0:00.18 G1 Conc#0 20761 lhdop 20 0 7766336 354944 28800 S 0.0 2.3 0:00.04 G1 Refine#0 20762 lhdop 20 0 7766336 354944 28800 S 0.0 2.3 0:14.18 G1 Young RemSet 20763 lhdop 20 0 7766336 354944 28800 S 0.0 2.3 0:02.24 VM Thread 20764 lhdop 20 0 7766336 354944 28800 S 0.0 2.3 0:00.00 Reference Handl 20765 lhdop 20 0 7766336 354944 28800 S 0.0 2.3 0:00.00 Finalizer 20766 lhdop 20 0 7766336 354944 28800 S 0.0 2.3 0:00.00 Signal Dispatch …
参数说明：
-H :Threads-mode operation Instructs top to display individual threads. Without this command-line option a summation of all threads in each process is shown.
Later this can be changed with the `H\' interactive command.
说明：top默认显示一屏的内容，
如果用top查看某个进程下的所有线程，可以加参数 -b
三，ps查看线程:
[lhdop@blog ~]$ ps -T -p 20756 PID SPID TTY TIME CMD 20756 20756 ? 00:00:00 java 20756 20757 ? 00:00:04 java 20756 20758 ? 00:00:00 GC Thread#0 20756 20759 ? 00:00:00 G1 Main Marker 20756 20760 ? 00:00:00 G1 Conc#0 20756 20761 ? 00:00:00 G1 Refine#0 20756 20762 ? 00:00:14 G1 Young RemSet 20756 20763 ? 00:00:02 VM Thread 20756 20764 ? 00:00:00 Reference Handl 20756 20765 ? 00:00:00 Finalizer 20756 20766 ? 00:00:00 Signal Dispatch 20756 20767 ? 00:00:02 Service Thread 20756 20768 ? 00:00:12 C2 CompilerThre 20756 20769 ? 00:00:04 C1 CompilerThre 20756 20770 ? 00:00:00 Sweeper thread 20756 20771 ? 00:00:00 Notification Th 20756 20772 ? 00:00:34 VM Periodic Tas 20756 20773 ? 00:00:00 Common-Cleaner 20756 20775 ? 00:00:00 GC Thread#1 20756 20776 ? 00:00:00 GC Thread#2 20756 20778 ? 00:00:00 GC Thread#3 20756 20781 ? 00:00:00 G1 Refine#1 20756 20782 ? 00:02:44 Log4j2-TF-10-As ...
参数说明：
-T Show threads, possibly with SPID column.
四，查看linux的版本:
[lhdop@blog ~]$ cat /etc/os-release NAME="CentOS Linux" VERSION="8 (Core)" ID="centos" ID_LIKE="rhel fedora" VERSION_ID="8" PLATFORM_ID="platform:el8" PRETTY_NAME="CentOS Linux 8 (Core)" ANSI_COLOR="0;31" CPE_NAME="cpe:/o:centos:centos:8" HOME_URL="https://www.centos.org/" BUG_REPORT_URL="https://bugs.centos.org/" CENTOS_MANTISBT_PROJECT="CentOS-8" CENTOS_MANTISBT_PROJECT_VERSION="8" REDHAT_SUPPORT_PRODUCT="centos" REDHAT_SUPPORT_PRODUCT_VERSION="8"
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