linux环境通过TOP查看进程所在CPU

作者: LiHui 分类: CPU 发布时间: 2014-11-02 15:00

多核程序,需要查看进程绑定的CPU Affinity是否正确无误,否则性能可能大受影响,通常想知道进程所在cpu可通过下面命令查询:

pgrep 进程名得到进程pid: process_id

ps –eo pid,psr | grep process_id 就可以得到绑定的cpu id

假如多进程进程名都一致,那么一个一个查询显得不那么直观,也可以直接通过top显示出cpu affinity情况

1:top查看

  PID  USER      PR  NI  VIRT  RES   SHR S %CPU %MEM    TIME+  COMMAND
18722 root      20   0 5232m 5.0g  32m R 56.7     8.0      1540:10    echo
19158 root      20   0 2553m 2.4g  32m R 53.3     3.8      1539:18    echo
5154  root      20   0 15300  1568  956  R  0.3      0.0      0:00.05     top
    1     root      20   0 19352   508   296  S  0.0      0.0      0:02.49     init

 

 

2:输入小写f

Current Fields:  AEHIOQTWKNMbcdfgjplrsuvyzX  for window 1:Def
Toggle fields via field letter, type any other key to return

* A: PID        = Process Id                                                0x00000100  PF_SUPERPRIV
* E: USER       = User Name                                                 0x00000200  PF_DUMPCORE
* H: PR         = Priority                                                  0x00000400  PF_SIGNALED
* I: NI         = Nice value                                                0x00000800  PF_MEMALLOC
* O: VIRT       = Virtual Image (kb)                                        0x00002000  PF_FREE_PAGES (2.5)
* Q: RES        = Resident size (kb)                                        0x00008000  debug flag (2.5)
* T: SHR        = Shared Mem size (kb)                                      0x00024000  special threads (2.5)
* W: S          = Process Status                                            0x001D0000  special states (2.5)
* K: %CPU       = CPU usage                                                 0x00100000  PF_USEDFPU (thru 2.4)
* N: %MEM       = Memory usage (RES)
* M: TIME+      = CPU Time, hundredths
  b: PPID       = Parent Process Pid
  c: RUSER      = Real user name
  d: UID        = User Id
  f: GROUP      = Group Name
  g: TTY        = Controlling Tty
  j: P          = Last used cpu (SMP)
  p: SWAP       = Swapped size (kb)
  l: TIME       = CPU Time
  r: CODE       = Code size (kb)
  s: DATA       = Data+Stack size (kb)
  u: nFLT       = Page Fault count
  v: nDRT       = Dirty Pages count
  y: WCHAN      = Sleeping in Function
  z: Flags      = Task Flags <sched.h>
* X: COMMAND    = Command name/line

 

3:输入小写j,那么上面红色那一行的j会变成大写

* J: P          = Last used cpu (SMP)

4:确定回车,返回top界面,多出来的一列,就能得到该进程所在的cpu id

  PID  USER      PR  NI  VIRT  RES    SHR S  %CPU %MEM    TIME+   P  COMMAND
18722 root      20   0 5232m 5.0g   32m R  56.9     8.0      1540:44  0     echo
19158 root      20   0 2553m 2.4g   32m R  53.6     3.8      1539:52  8     echo
5166  root      20   0 15300  1576  960   R  0.3       0.0      0:00.21  14     top
    1     root      20   0 19352  508    296   S  0.0       0.0      0:02.49  13     init

当然越是占用资源越多的,越排在top的前列,越容易直观地查看,假如资源占用不多top无法查看,还是可以用开始的命令得出结果

纯属恶搞

浙ICP备16024533号

浙公网安备 33010802007459号