Comment 63 for bug 620074

Revision history for this message
In , gaguilar (gaguilar-linux-kernel-bugs) wrote :

Hi all,

More tests

 Linux ws-esp16 2.6.27-11-generic #1 SMP Thu Jan 8 08:38:33 UTC 2009 i686 GNU/Linux
 $ ./processtest 100 200000
 min:0.006ms|avg:0.278-0.520ms|mid:0.475ms|max:141.058ms|duration:107.646s
 $ ./threadtest 100 200000
 min:0.006ms|avg:0.690-0.768ms|mid:0.715ms|max:235.106ms|duration:159.355s

But if this is a IO problem why monitors does not show a big IO Wait Percentage. It shows a high system usage percentage.
So I suppose that not IO problem seems to be related to process handling inside kernel. May it be related to the preemption model?

I did some additional test:

   1.-Change clock timing -> (no improvement)
   2.-Change preemption model (tested all of them) -> (no improvement)
   3.-Change IO scheduler -> (no improvement)

Is there any way to profile the kernel to see what function gets more attention?

Hope you find somethig...

I attach a screenshot also...