linux查看进程下的线程_linux查看线程状态

全栈程序员站长

发布于 2022-09-20 10:49:33

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发布于 2022-09-20 10:49:33

文章被收录于专栏：全栈程序员必看

鉴于linux下线程的广泛使用我们怎么查看某个进程拥有的线程id了

现在很多服务的设计主进程->子进程->线程(比如mysql,varnish)

主进程负责侦听网络上的连接并把连接发送给子进程子进程派生线程去处理这些线程

mysql(父进程460,子进程863)

  1   460   425   333 ?           -1 S        0   0:00 /bin/sh /usr/local/mysql/bin/mysqld_safe --datadir=/storage/mysql/backup --pid-file=/storag
  460   863   425   333 ?           -1 Sl     500  21:34  \_ /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/storage/mysql/backup

1、ps

　　-T Show threads, possibly with SPID column

[root@pdd1 ~]# ps -T -p 863 PID SPID TTY TIME CMD 863 863 ? 00:00:00 mysqld 863 865 ? 00:00:51 mysqld 863 866 ? 00:01:14 mysqld 863 867 ? 00:00:58 mysqld 863 868 ? 00:00:50 mysqld 863 869 ? 00:00:49 mysqld 863 870 ? 00:00:52 mysqld 863 871 ? 00:00:50 mysqld 863 872 ? 00:00:49 mysqld 863 873 ? 00:00:51 mysqld 863 874 ? 00:00:48 mysqld 863 876 ? 00:04:22 mysqld 863 877 ? 00:07:54 mysqld 863 878 ? 00:00:19 mysqld 863 879 ? 00:00:00 mysqld 863 882 ? 00:00:00 mysqld 863 887 ? 00:00:00 mysqld 863 2408 ? 00:00:00 mysqld 863 2428 ? 00:00:00 mysqld

我们可以看到子进程863派生出的线程第一行spid 863是主线程(我们知道主线程就是该进程本身)

2、top

-H : Threads toggle Starts top with the last remembered ’H’ state reversed. When this toggle is On, all individual threads will be dis- played. Otherwise, top displays a summation of all threads in a process.

top -H -p 863

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 872 mysql 20 0 741m 56m 4972 S 0.3 5.7 0:49.11 mysqld 876 mysql 20 0 741m 56m 4972 S 0.3 5.7 4:22.76 mysqld 863 mysql 20 0 741m 56m 4972 S 0.0 5.7 0:00.06 mysqld 865 mysql 20 0 741m 56m 4972 S 0.0 5.7 0:51.65 mysqld 866 mysql 20 0 741m 56m 4972 S 0.0 5.7 1:14.77 mysqld 867 mysql 20 0 741m 56m 4972 S 0.0 5.7 0:58.15 mysqld 868 mysql 20 0 741m 56m 4972 S 0.0 5.7 0:50.26 mysqld 869 mysql 20 0 741m 56m 4972 S 0.0 5.7 0:49.88 mysqld 870 mysql 20 0 741m 56m 4972 S 0.0 5.7 0:52.48 mysqld 871 mysql 20 0 741m 56m 4972 S 0.0 5.7 0:50.83 mysqld 873 mysql 20 0 741m 56m 4972 S 0.0 5.7 0:51.90 mysqld 874 mysql 20 0 741m 56m 4972 S 0.0 5.7 0:48.10 mysqld 877 mysql 20 0 741m 56m 4972 S 0.0 5.7 7:55.01 mysqld 878 mysql 20 0 741m 56m 4972 S 0.0 5.7 0:19.84 mysqld 879 mysql 20 0 741m 56m 4972 S 0.0 5.7 0:00.00 mysqld 882 mysql 20 0 741m 56m 4972 S 0.0 5.7 0:00.00 mysqld 887 mysql 20 0 741m 56m 4972 S 0.0 5.7 0:00.58 mysqld 2408 mysql 20 0 741m 56m 4972 S 0.0 5.7 0:00.00 mysqld 2428 mysql 20 0 741m 56m 4972 S 0.0 5.7 0:00.06 mysqld

3、pstree

[root@pdd1 ~]# pstree -Aup -h 460 mysqld_safe(460)---mysqld(863,mysql)-+-{mysqld}(865) |-{mysqld}(866) |-{mysqld}(867) |-{mysqld}(868) |-{mysqld}(869) |-{mysqld}(870) |-{mysqld}(871) |-{mysqld}(872) |-{mysqld}(873) |-{mysqld}(874) |-{mysqld}(876) |-{mysqld}(877) |-{mysqld}(878) |-{mysqld}(879) |-{mysqld}(882) |-{mysqld}(887) |-{mysqld}(2408) `-{mysqld}(2428)

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