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

[Denys]

That 2.6.21 works fine and 2.6.22 MUCH worse on multiple servers with similar
workload.
Plus all userspace becoming extremely unstable, and definitely ping 127.0.0.1
must not reach 300ms.


On Mon, 1 Oct 2007 13:57:21 +0200, Andi Kleen wrote
> On Mon, Oct 01, 2007 at 02:52:03PM +0300, Denys wrote:
> > Hi
> > 
> > No major differences. 
> > Some procedures higher a bit, some lower a bit, but everything looks fine on
> > both kernels.
> > 
> > Thats what i tried first - oprofile, and only one keypoint i was able to catch
> > - in top softirqd/0 or /1 shows usage 100% cpu, and in mpstat - soft% also
> > reaching 100%.
> 
> Then you likely just have higher load. What makes you think this
> is a kernel problem?
> 
> -Andi


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

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