Finding usage of resources (CPU and memory) by threads of a process in unix (solaris/linux)

Question

I have a multi-threaded application(C++ and pthread library) and I will like to know how much resources(CPU and memory) each thread uses. Is there a way to find out these details on Solaris and Linux both or on either of them.

Answer 1

Hi,

You could use the ps command with some option:

ps -eLo pid,ppid,lwp,nlwp,osz,rss,ruser,pcpu,stime,etime,args | more
  PID  PPID    LWP NLWP   SZ  RSS    RUSER %CPU    STIME     ELAPSED COMMAND
    0     0      1    1    0    0     root  0.0   Oct_02  4-02:13:37 sched
    1     0      1    1  298  528     root  0.0   Oct_02  4-02:13:36 /sbin/init
    2     0      1    1    0    0     root  0.0   Oct_02  4-02:13:36 pageout

Have a look at the ps man's page to get some information (LWP (light weight process))