Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932586AbVKWWWX (ORCPT ); Wed, 23 Nov 2005 17:22:23 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932589AbVKWWWX (ORCPT ); Wed, 23 Nov 2005 17:22:23 -0500 Received: from fmr21.intel.com ([143.183.121.13]:27094 "EHLO scsfmr001.sc.intel.com") by vger.kernel.org with ESMTP id S932588AbVKWWWT (ORCPT ); Wed, 23 Nov 2005 17:22:19 -0500 Subject: Re: [PATCH]: Free pages from local pcp lists under tight memory conditions From: Rohit Seth To: Christoph Lameter Cc: Andrew Morton , torvalds@osdl.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org In-Reply-To: References: <20051122161000.A22430@unix-os.sc.intel.com> <1132775194.25086.54.camel@akash.sc.intel.com> <20051123115545.69087adf.akpm@osdl.org> <1132779605.25086.69.camel@akash.sc.intel.com> Content-Type: text/plain Organization: Intel Date: Wed, 23 Nov 2005 14:29:03 -0800 Message-Id: <1132784943.25086.87.camel@akash.sc.intel.com> Mime-Version: 1.0 X-Mailer: Evolution 2.2.2 (2.2.2-5) Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 23 Nov 2005 22:22:05.0150 (UTC) FILETIME=[5587C7E0:01C5F07C] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 951 Lines: 23 On Wed, 2005-11-23 at 13:25 -0800, Christoph Lameter wrote: > On Wed, 23 Nov 2005, Rohit Seth wrote: > > > I thought Nick et.al came up with some of the constant values like batch > > size to tackle the page coloring issue specifically. In any case, I > > think one of the key difference between 2.4 and 2.6 allocators is the > > pcp list. And even with the minuscule batch and high watermarks this is > > helping ordinary benchmarks (by reducing the variation from run to run). > > Could you share some benchmark results? > Some components of cpu2k on 2.4 base kernels show in access of 40-50% variation from run to run. The same variations came down to about 10% for 2.6 based kernels. -rohit - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/