Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758260AbYCVFr4 (ORCPT ); Sat, 22 Mar 2008 01:47:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753308AbYCVFrs (ORCPT ); Sat, 22 Mar 2008 01:47:48 -0400 Received: from mail.gmx.net ([213.165.64.20]:49291 "HELO mail.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1752339AbYCVFrs (ORCPT ); Sat, 22 Mar 2008 01:47:48 -0400 X-Authenticated: #14349625 X-Provags-ID: V01U2FsdGVkX19PC6RxFEBPx6AmB8Mojy1lFWKjXDZVkCRbuzL5ML 9WqJ+9iGiHfQbP Subject: Re: Scalability requirements for sysv ipc From: Mike Galbraith To: Manfred Spraul Cc: paulmck@linux.vnet.ibm.com, Nadia Derbey , Linux Kernel Mailing List , Andrew Morton In-Reply-To: <47E3DD8C.4000904@colorfullife.com> References: <47E382DB.70503@colorfullife.com> <47E3ADE3.4030304@bull.net> <47E3B924.3000304@colorfullife.com> <20080321141339.GB9618@linux.vnet.ibm.com> <47E3DD8C.4000904@colorfullife.com> Content-Type: text/plain Date: Sat, 22 Mar 2008 06:43:28 +0100 Message-Id: <1206164608.3659.11.camel@marge.simson.net> Mime-Version: 1.0 X-Mailer: Evolution 2.12.0 Content-Transfer-Encoding: 7bit X-Y-GMX-Trusted: 0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1544 Lines: 48 On Fri, 2008-03-21 at 17:08 +0100, Manfred Spraul wrote: > Paul E. McKenney wrote: > > I could give it a spin -- though I would need to be pointed to the > > patch and the test. > > > > > I'd just compare a recent kernel with something older, pre Fri Oct 19 > 11:53:44 2007 > > Then download ctxbench, run one instance on each core, bound with taskset. > http://www.tmr.com/%7Epublic/source/ > (I don't juse ctxbench myself, if it doesn't work then I could post my > own app. It would be i386 only with RDTSCs inside) (test gizmos are always welcome) Results for Q6600 box don't look particularly wonderful. taskset -c 3 ./ctx -s 2.6.24.3 3766962 itterations in 9.999845 seconds = 376734/sec 2.6.22.18-cfs-v24.1 4375920 itterations in 10.006199 seconds = 437330/sec for i in 0 1 2 3; do taskset -c $i ./ctx -s& done 2.6.22.18-cfs-v24.1 4355784 itterations in 10.005670 seconds = 435361/sec 4396033 itterations in 10.005686 seconds = 439384/sec 4390027 itterations in 10.006511 seconds = 438739/sec 4383906 itterations in 10.006834 seconds = 438128/sec 2.6.24.3 1269937 itterations in 9.999757 seconds = 127006/sec 1266723 itterations in 9.999663 seconds = 126685/sec 1267293 itterations in 9.999348 seconds = 126742/sec 1265793 itterations in 9.999766 seconds = 126592/sec -Mike -- 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/