From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail6.bemta12.messagelabs.com (mail6.bemta12.messagelabs.com [216.82.250.247]) by kanga.kvack.org (Postfix) with ESMTP id 389A16B002D for ; Mon, 31 Oct 2011 09:37:54 -0400 (EDT) Date: Mon, 31 Oct 2011 08:37:49 -0500 From: Dimitri Sivanich Subject: Re: [PATCH] cache align vm_stat Message-ID: <20111031133749.GB17076@sgi.com> References: <20111024161035.GA19820@sgi.com> <20111028155456.20f3d611.akpm@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20111028155456.20f3d611.akpm@linux-foundation.org> Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton Cc: Christoph Lameter , linux-kernel@vger.kernel.org, linux-mm@kvack.org, David Rientjes , Andi Kleen , Mel Gorman 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 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 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org