Take the 2-minute tour ×
Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems.. It's 100% free, no registration required.

I want to see if my process makes a lot of context switches. I also want to see how manpulating task groups affects the number of context switches.

share|improve this question
    
What OS? What version? What kernel? –  Mikel May 25 '12 at 16:48
    
GNU/Linux 2.6.18 –  luntain May 25 '12 at 17:28
4  
Check /proc/[pid]/status –  Kevin May 25 '12 at 17:34
add comment

2 Answers

pidstat(1) - Report statistics for Linux tasks. According to man pidstat it's so easy as just pidstat -w …

share|improve this answer
add comment

You can view information about your process's context switches in /proc/<pid>/status.

$ pid=307
$ grep ctxt /proc/$pid/status
voluntary_ctxt_switches:        41
nonvoluntary_ctxt_switches:     16

To see these numbers updating continuously, run

$ # Update twice a second.
$ watch -n.5 grep ctxt /proc/$pid/status

To get just the numbers, run

$ grep ctxt /proc/$pid/status | awk '{ print $2 }'
share|improve this answer
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.