Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752138AbZIGU5L (ORCPT ); Mon, 7 Sep 2009 16:57:11 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751986AbZIGU5L (ORCPT ); Mon, 7 Sep 2009 16:57:11 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:37255 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751689AbZIGU5K (ORCPT ); Mon, 7 Sep 2009 16:57:10 -0400 Date: Mon, 7 Sep 2009 22:57:01 +0200 From: Ingo Molnar To: Michael Buesch Cc: Con Kolivas , linux-kernel@vger.kernel.org, Peter Zijlstra , Mike Galbraith , Felix Fietkau Subject: Re: BFS vs. mainline scheduler benchmarks and measurements Message-ID: <20090907205701.GA8590@elte.hu> References: <20090906205952.GA6516@elte.hu> <200909071716.57722.mb@bu3sch.de> <20090907182629.GA3484@elte.hu> <200909072051.13748.mb@bu3sch.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200909072051.13748.mb@bu3sch.de> User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.5 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 952 Lines: 24 * Michael Buesch wrote: > On Monday 07 September 2009 20:26:29 Ingo Molnar wrote: > > Could you profile it please? Also, what's the context-switch rate? > > As far as I can tell, the broadcom mips architecture does not have > profiling support. It does only have some proprietary profiling > registers that nobody wrote kernel support for, yet. Well, what does 'vmstat 1' show - how many context switches are there per second on the iperf server? In theory if it's a truly saturated box, there shouldnt be many - just a single iperf task running at 100% CPU utilization or so. (Also, if there's hrtimer support for that board then perfcounters could be used to profile it.) Ingo -- 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/