Linux下多线程查看工具(pstree、ps、pstack),linux命令之-pstree使用说明

来源：互联网发布：linux vi创建文件编辑：程序博客网时间：2024/05/22 06:18

1. pstree

pstree以树结构显示进程

root@119.10.6.*:~# pstreeinit─┬─NetworkManager  ├─abrt-dump-oops  ├─abrtd  ├─atd  ├─auditd───{auditd}  ├─automount───4*[{automount}]  ├─certmonger  ├─crond  ├─dbus-daemon  ├─hald─┬─hald-runner─┬─hald-addon-acpi  │ │   └─hald-addon-inpu  │ └─{hald}  ├─httpd─┬─httpd  │  └─4*[httpd───26*[{httpd}]]  ├─irqbalance  ├─mcelog  ├─6*[mingetty]  ├─modem-manager  ├─mysqld_safe───mysqld───38*[{mysqld}]  ├─nginx───13*[nginx]  ├─php-fpm───76*[php-fpm]  ├─portreserve  ├─rpc.idmapd  ├─rpc.statd  ├─rpcbind  ├─rsyslogd───3*[{rsyslogd}]  ├─2*[sendmail]  ├─sshd───sshd───bash───pstree  ├─udevd───2*[udevd]  ├─wpa_supplicant  └─xinetd

2. ps -Lf

$ ps -Lf 1892

如下：PHP进程共启动了0个线程

root@119.10.6.**:~# ps -Lf 1892

UID PID PPID LWP C NLWP STIME TTY STAT TIME CMD

root 1892 1 1892 0 1 Jan15 ? Ss 0:53 php-fpm: master process (/usr/local/php/etc/php-fpm.conf)

Mysql多个线程：

root@119.10.6.*:~# ps -Lf 3005

UID PID PPID LWP C NLWP STIME TTY STAT TIME CMD

mysql 3005 2011 3005 0 39 Jan15 ? Sl 2:25 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/data/mysql --plugin-dir=

mysql 3005 2011 3081 0 39 Jan15 ? Sl 0:00 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/data/mysql --plugin-dir=

mysql 3005 2011 3082 0 39 Jan15 ? Sl 0:05 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/data/mysql --plugin-dir=

mysql 3005 2011 3083 0 39 Jan15 ? Sl 0:00 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/data/mysql --plugin-dir=

mysql 3005 2011 3084 0 39 Jan15 ? Sl 0:00 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/data/mysql --plugin-dir=

mysql 3005 2011 3085 0 39 Jan15 ? Sl 0:00 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/data/mysql --plugin-dir=

mysql 3005 2011 3086 0 39 Jan15 ? Sl 0:00 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/data/mysql --plugin-dir=

mysql 3005 2011 3087 0 39 Jan15 ? Sl 0:05 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/data/mysql --plugin-dir=

3. pstack

pstack显示每个进程的栈跟踪,PHP的fpm主进程，发现这玩意是走的epoll：

root@119.10.6.23:~# pstack 1892

#0 0x00000030e9ae8fb3 in __epoll_wait_nocancel () from /lib64/libc.so.6

#1 0x0000000000856a74 in fpm_event_epoll_wait ()

#2 0x000000000084afff in fpm_event_loop ()

#3 0x0000000000845ee7 in fpm_run ()

#4 0x000000000084d900 in main ()

You have new mail in /var/spool/mail/root

本文来自：Linux学习教程网

0 0