Linux常用命令-pidstat

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命令

pidstat

描述

Report statistics for Linux tasks
显示系统进程统计信息

用法

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pidstat [ options ] [ <interval> [ <count> ] ]

选项

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Options:
  -C CMD  指定命令名称,支持正则
  -d  显示系统IO
  -l  显示完整的命令行
  -p { pid [,...] | ALL }  指定pid,ALL表示显示所有
  -r  显示页面错误和内存使用情况
  -s  显示堆栈信息
  -t  显示线程信息
  -U  显示用户名而非UID

注意

pidstat命令可以显示指定进程统计信息
pldd命令可以显示指定进程PID的共享库
pmap命令可以显示指定进程PID的内存映射
prtstat命令可以显示进程详细信息

示例

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# -C指定sshd进程
$ pidstat -C sshd
Linux 3.10.0-1160.11.1.el7.x86_64 (centos7)     03/12/2021      _x86_64_        (2 CPU)
07:53:54 PM   UID       PID    %usr %system  %guest    %CPU   CPU  Command
07:53:54 PM     0     10649    0.00    0.00    0.00    0.00     1  sshd
07:53:54 PM     0     10726    0.00    0.00    0.00    0.00     1  sshd
# -d显示系统IO
$ pidstat -d -C sshd
07:55:18 PM   UID       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
07:55:18 PM     0     10578      0.00      0.00      0.00  sshd
# -p指定pid
$ pidstat -p 10649
08:05:06 PM   UID       PID    %usr %system  %guest    %CPU   CPU  Command
08:05:06 PM     0     10726    0.00    0.00    0.00    0.00     1  sshd
# -r显示内存使用信息
$ pidstat -r -C sshd
08:05:51 PM   UID       PID  minflt/s  majflt/s     VSZ    RSS   %MEM  Command
08:05:51 PM     0     10578      0.06      0.00  112936   4296   0.21  sshd
08:05:51 PM     0     10649      0.08      0.00  157512   5924   0.29  sshd
08:05:51 PM     0     10726      0.08      0.00  157512   5924   0.29  sshd
# 指定进程pid,间隔2s显示5次
$ pidstat -r -p 10726 2 5
08:15:22 PM   UID       PID  minflt/s  majflt/s     VSZ    RSS   %MEM  Command
08:15:24 PM     0     10726      0.00      0.00  157512   5924   0.29  sshd
08:15:26 PM     0     10726      0.00      0.00  157512   5924   0.29  sshd
08:15:28 PM     0     10726      0.00      0.00  157512   5924   0.29  sshd
08:15:30 PM     0     10726      0.00      0.00  157512   5924   0.29  sshd
08:15:32 PM     0     10726      0.00      0.00  157512   5924   0.29  sshd
Average:        0     10726      0.00      0.00  157512   5924   0.29  sshd
# -s显示堆栈信息
$ pidstat -s -C sshd
08:06:26 PM   UID       PID StkSize  StkRef  Command
08:06:26 PM     0     10578    132      20  sshd
08:06:26 PM     0     10649    132      36  sshd
08:06:26 PM     0     10726    132      36  sshd
# -t显示线程信息
$ pidstat -t -C sshd
08:09:13 PM   UID      TGID       TID    %usr %system  %guest    %CPU   CPU  Command
08:09:13 PM     0     10649         -    0.00    0.00    0.00    0.00     1  sshd
08:09:13 PM     0         -     10649    0.00    0.00    0.00    0.00     1  |__sshd
08:09:13 PM     0     10726         -    0.00    0.00    0.00    0.00     1  sshd
08:09:13 PM     0         -     10726    0.00    0.00    0.00    0.00     1  |__sshd
# -U显示用户名,USER字段默认显示为UID
$ pidstat -U -C sshd
08:11:33 PM     USER       PID    %usr %system  %guest    %CPU   CPU  Command
08:11:33 PM     root     10649    0.00    0.00    0.00    0.00     1  sshd
08:11:33 PM     root     10726    0.00    0.00    0.00    0.00     0  sshd
# 显示sshd和chronyd进程信息
$ pidstat -r -p ALL -C "sshd|chronyd"
08:16:00 PM   UID       PID  minflt/s  majflt/s     VSZ    RSS   %MEM  Command
08:16:00 PM   998     10531      0.01      0.00  100496   1396   0.07  chronyd
08:16:00 PM     0     10578      0.05      0.00  112936   4296   0.21  sshd
08:16:00 PM     0     10649      0.07      0.00  157512   5924   0.29  sshd
08:16:00 PM     0     10726      0.07      0.00  157512   5924   0.29  sshd

# pldd命令可以显示指定进程PID的共享库
$ pldd 10531  
10531:  /usr/sbin/chronyd
linux-vdso.so.1
/lib64/libm.so.6
/lib64/libfreebl3.so
/lib64/libcap.so.2
/lib64/libseccomp.so.2
/lib64/libpthread.so.0
/lib64/libc.so.6
/lib64/ld-linux-x86-64.so.2
/lib64/libdl.so.2
/lib64/libattr.so.1
/lib64/libnss_files.so.2
/lib64/libnss_dns.so.2
/lib64/libresolv.so.2
# 参考ldd命令显示结果
$ ldd /usr/sbin/chronyd
linux-vdso.so.1 =>  (0x00007ffc48197000)
libm.so.6 => /lib64/libm.so.6 (0x00007f969dbab000)
libfreebl3.so => /lib64/libfreebl3.so (0x00007f969d9a8000)
libcap.so.2 => /lib64/libcap.so.2 (0x00007f969d7a3000)
libseccomp.so.2 => /lib64/libseccomp.so.2 (0x00007f969d562000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f969d346000)
libc.so.6 => /lib64/libc.so.6 (0x00007f969cf78000)
/lib64/ld-linux-x86-64.so.2 (0x00007f969e0ee000)
libdl.so.2 => /lib64/libdl.so.2 (0x00007f969cd74000)
libattr.so.1 => /lib64/libattr.so.1 (0x00007f969cb6f000)

# pmap命令可以查看指定进程PID的内存映射
$ pmap 10531   
10531:   /usr/sbin/chronyd
000055c7536a1000    248K r-x-- chronyd
000055c7538df000      4K r---- chronyd
000055c7538e0000      4K rw--- chronyd
000055c7538e1000      4K rw---   [ anon ]
000055c753db0000    132K rw---   [ anon ]
00007ff7cc000000    132K rw---   [ anon ]
00007ff7cc021000  65404K -----   [ anon ]
00007ff7d2942000     88K r-x-- libresolv-2.17.so
00007ff7d2958000   2048K ----- libresolv-2.17.so
00007ff7d2b58000      4K r---- libresolv-2.17.so
00007ff7d2b59000      4K rw--- libresolv-2.17.so
# -d显示设备格式
$ pmap -d 10531|head
10531:   /usr/sbin/chronyd
Address           Kbytes Mode  Offset           Device    Mapping
000055c7536a1000     248 r-x-- 0000000000000000 0fd:00000 chronyd
000055c7538df000       4 r---- 000000000003e000 0fd:00000 chronyd
000055c7538e0000       4 rw--- 000000000003f000 0fd:00000 chronyd
000055c7538e1000       4 rw--- 0000000000000000 000:00000   [ anon ]
000055c753db0000     132 rw--- 0000000000000000 000:00000   [ anon ]
00007ff7cc000000     132 rw--- 0000000000000000 000:00000   [ anon ]
00007ff7cc021000   65404 ----- 0000000000000000 000:00000   [ anon ]
00007ff7d2942000      88 r-x-- 0000000000000000 0fd:00000 libresolv-2.17.so
# -x显示扩展格式
$ pmap -x 10531|head
10531:   /usr/sbin/chronyd
Address           Kbytes     RSS   Dirty Mode  Mapping
000055c7536a1000     248     200       0 r-x-- chronyd
000055c7538df000       4       4       4 r---- chronyd
000055c7538e0000       4       4       4 rw--- chronyd
000055c7538e1000       4       4       4 rw---   [ anon ]
000055c753db0000     132      36      36 rw---   [ anon ]
00007ff7cc000000     132      12      12 rw---   [ anon ]
00007ff7cc021000   65404       0       0 -----   [ anon ]
00007ff7d2942000      88      56       0 r-x-- libresolv-2.17.so

# prtstat命令可以显示进程信息
$ prtstat 10531        
Process: chronyd                State: S (sleeping)
  CPU#:  1              TTY: 0:0        Threads: 1
Process, Group and Session IDs
  Process ID: 10531               Parent ID: 1
    Group ID: 10530              Session ID: 10530
  T Group ID: -1
Page Faults
  This Process    (minor major):      359         0
  Child Processes (minor major):        0         0
CPU Times
  This Process    (user system guest blkio):   0.00   0.01   0.00   0.00
  Child processes (user system guest):         0.00   0.00   0.00
Memory
  Vsize:       102 MB    
  RSS:         1429 kB                   RSS Limit: 18446744073709 MB
  Code Start:  0x55c7536a1000            Code Stop:  0x55c7536de9fc
  Stack Start: 0x7fff1a1e1160
  Stack Pointer (ESP): 0x7fff1a1e0d10    Inst Pointer (EIP): 0x7ff7d3c759a3
Scheduling
  Policy: normal
  Nice:   0              RT Priority: 0 (non RT)
# -r显示原始格式
$ prtstat -r 10531
         pid: 10531                               comm: chronyd
       state: S                                   ppid: 1
        pgrp: 10530                            session: 10530
      tty_nr: 0                                  tpgid: -1
       flags: 40402140                          minflt: 359
     cminflt: 0                                 majflt: 0
     cmajflt: 0                                  utime: 0
       stime: 1                                 cutime: 0
      cstime: 0                               priority: 20
        nice: 0                            num_threads: 1
 itrealvalue: 0                              starttime: 2305400
       vsize: 102907904                            rss: 349
      rsslim: 18446744073709551615                   startcode: 94314586312704
     endcode: 94314586565116                startstack: 140733631566176
     kstkesp: 7FFF1A1E0D10                     kstkeip: 7FF7D3C759A3
       wchan: 18446744071682015509                       nswap: 0
      cnswap: 18446744071682015509                 exit_signal: 17
   processor: 1                            rt_priority: 0
      policy: 0                  delayaccr_blkio_ticks: 0
  guest_time: 0                            cguest_time: 0