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SubjectRe: volano ~30% regression with 2.6.33-rc1 & -rc2
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On Mon, 2010-01-04 at 20:40 +0800, Arjan van de Ven wrote:
> On Mon, 04 Jan 2010 16:15:58 +0800
> Lin Ming <ming.m.lin@intel.com> wrote:
>
> > Mike & Peter,
> >
> > Compared with 2.6.32, volano has ~30% regression with 2.6.33-rc1 &
> > -rc2. Testing machine: Tigerton Xeon, 16cpus(4P/4Core), 16G memory
>
> did this show up only on this cpu?
> (since this is a multi-core-without-shared-cache cpu, it could be that
> we get the topology wrong and think cores share cache where they don't)

Tulsa machine(16cpus, 4P/2Core/HT) also has ~8% regression
and it's now fixed by Mike's patch.

Lin Ming



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