Re: context switch

[William C. <wc...@re...>]

On 09/20/2011 02:57 AM, Jonathan Kukin wrote:
> Hi William
> 
> I'm using kernel 2.6.18...
> Do I have another possibility to collect context switches and page faults?
> 
> Thanks,
> Jonathan
> 

Hi Jonathan,

You might take a look at SystemTap, http://sourceware.org/systemtap/. It has probe points for context switches and page faults.

Look at the the profiling/sched_switch.stp and  memory/pfaults.stp for example probing for context switches and page faults at:

http://sourceware.org/systemtap/examples/

You didn't mention whether this is a Red Hat Enterprise Linux 5 kernel you are using. If it is, there are also "kernel.trace("*")" probe points available. The are some examples using those on http://sourceware.org/systemtap/examples/. You systemtap can list whether those are available with:

stap -L 'kernel.trace("*")'

Hope that helps.

-Will