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

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Date:	Mon, 1 Oct 2007 13:30:52 +0300
From:	"Denys" <nuclearcat@...learcat.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: 2.6.21 -> 2.6.22 & 2.6.23-rc8 performance regression


Already i did, and it didn't show real failure point.

On 01 Oct 2007 12:01:24 +0200, Andi Kleen wrote
> "Denys" <nuclearcat@...learcat.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


--
Denys Fedoryshchenko
Technical Manager
Virtual ISP S.A.L.

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