Re: 2.6.21 -> 2.6.22 & 2.6.23-rc8 performance regression

Andi Kleen
2007-10-01T10:01:32Z

"Denys" <nuclearcat@nuclearcat.com> writes:

> by mistake i will miss a point (it can detect bug easily, IF softirq in
> mpstat 1 will jump up to 30+%. On 2.6.21 it is always staying +-10%, on
> "buggy" version it jumps up to 100%. Now cause less load at night up to 30-
> 50%, so on hardware it is not very noticeable (thats why maybe not much
> feedbacks), i am trying to utilise hardware maximum as possible - so i feel
> regressions much more.

You could use oprofile to find where the CPU time is spent

-Andi