From: Dimitri Sivanich <sivanich@sgi.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Christoph Lameter <cl@gentwo.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
David Rientjes <rientjes@google.com>,
Andi Kleen <andi@firstfloor.org>, Mel Gorman <mel@csn.ul.ie>
Subject: Re: [PATCH] cache align vm_stat
Date: Mon, 31 Oct 2011 08:37:49 -0500 [thread overview]
Message-ID: <20111031133749.GB17076@sgi.com> (raw)
In-Reply-To: <20111028155456.20f3d611.akpm@linux-foundation.org>
On Fri, Oct 28, 2011 at 03:54:56PM -0700, Andrew Morton wrote:
> On Wed, 26 Oct 2011 21:31:46 -0500 (CDT)
> Christoph Lameter <cl@gentwo.org> wrote:
>
> > On Mon, 24 Oct 2011, Dimitri Sivanich wrote:
> >
> > > Avoid false sharing of the vm_stat array.
>
> Did we have some nice machine-description and measurement results which
> can be included in the changelog? Such things should always be
> included with a performace patch!
>
Tests run on a 640 cpu UV system.
With 120 threads doing parallel writes, each to different tmpfs mounts:
No patch: ~300 MB/sec
With vm_stat alignment: ~430 MB/sec
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next prev parent reply other threads:[~2011-10-31 13:37 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-24 16:10 [PATCH] cache align vm_stat Dimitri Sivanich
2011-10-27 2:31 ` Christoph Lameter
2011-10-28 22:54 ` Andrew Morton
2011-10-29 5:22 ` Christoph Lameter
2011-10-31 13:37 ` Dimitri Sivanich [this message]
-- strict thread matches above, loose matches on Subject: below --
2011-10-27 8:50 Mel Gorman
2011-10-27 12:51 ` Dimitri Sivanich
2011-10-27 14:29 ` Mel Gorman
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