Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757189AbYCZGTK (ORCPT ); Wed, 26 Mar 2008 02:19:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752359AbYCZGSy (ORCPT ); Wed, 26 Mar 2008 02:18:54 -0400 Received: from mail.gmx.net ([213.165.64.20]:36326 "HELO mail.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1752074AbYCZGSx (ORCPT ); Wed, 26 Mar 2008 02:18:53 -0400 X-Authenticated: #14349625 X-Provags-ID: V01U2FsdGVkX1/zBFICZj3zbLk3jVeRCz8brF1B8ZsIudMBIoVohc RTjoGEG2YXT9TY Subject: Re: Scalability requirements for sysv ipc From: Mike Galbraith To: Peter Zijlstra Cc: Manfred Spraul , Linux Kernel Mailing List , paulmck@linux.vnet.ibm.com, Nadia Derbey , Andrew Morton , Ingo Molnar In-Reply-To: <1206461630.8514.441.camel@twins> References: <47E382DB.70503@colorfullife.com> <47E3ADE3.4030304@bull.net> <47E3B924.3000304@colorfullife.com> <20080321141339.GB9618@linux.vnet.ibm.com> <47E3DD8C.4000904@colorfullife.com> <1206164608.3659.11.camel@marge.simson.net> <47E4DB06.3020003@colorfullife.com> <1206186832.4545.1.camel@marge.simson.net> <47E51637.8060102@colorfullife.com> <47E55945.10109@colorfullife.com> <1206460206.4414.21.camel@marge.simson.net> <1206461630.8514.441.camel@twins> Content-Type: text/plain Date: Wed, 26 Mar 2008 07:18:46 +0100 Message-Id: <1206512326.21146.0.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: 584 Lines: 16 On Tue, 2008-03-25 at 17:13 +0100, Peter Zijlstra wrote: > > ...and I verified it via :-/ echo 7 > sched_features in latest. That > > only bought me roughly half though, so there's a part three in there > > somewhere. > > Ouch, I guess hrtimers are just way expensive on some hardware... It takes a large bite out of my P4 as well. -- 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/