From: Lin Ming <ming.m.lin@intel.com>
To: Arjan van de Ven <arjan@infradead.org>
Cc: Mike Galbraith <efault@gmx.de>,
Peter Zijlstra <peterz@infradead.org>,
lkml <linux-kernel@vger.kernel.org>,
"Zhang, Yanmin" <yanmin_zhang@linux.intel.com>
Subject: Re: volano ~30% regression with 2.6.33-rc1 & -rc2
Date: Tue, 05 Jan 2010 08:44:59 +0800 [thread overview]
Message-ID: <1262652299.22471.117.camel@minggr.sh.intel.com> (raw)
In-Reply-To: <20100104044024.5390ff1c@infradead.org>
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
next prev parent reply other threads:[~2010-01-05 1:00 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-04 8:15 volano ~30% regression with 2.6.33-rc1 & -rc2 Lin Ming
2010-01-04 12:40 ` Arjan van de Ven
2010-01-04 12:57 ` Mike Galbraith
2010-01-04 13:02 ` Peter Zijlstra
2010-01-04 13:15 ` Mike Galbraith
2010-01-04 13:26 ` Peter Zijlstra
2010-01-04 13:44 ` [patch] " Mike Galbraith
2010-01-21 13:51 ` [tip:sched/urgent] sched: Fix vmark regression on big machines tip-bot for Mike Galbraith
2010-01-05 0:44 ` Lin Ming [this message]
2010-01-05 2:44 ` volano ~30% regression with 2.6.33-rc1 & -rc2 Mike Galbraith
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