1. pstree

pstree以樹結構顯示進程

root@119.10.6.*:~#?pstree init─┬─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進程共啟動了0個線程

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多個線程：

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顯示每個進程的棧跟蹤,PHP的fpm主進程，發現這玩意是走的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

• 本文來自：Linux學習教程網

轉載于:https://blog.51cto.com/9626185/1606925

總結

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