Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753025AbZIGX5Q (ORCPT ); Mon, 7 Sep 2009 19:57:16 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752899AbZIGX5P (ORCPT ); Mon, 7 Sep 2009 19:57:15 -0400 Received: from ee.oulu.fi ([130.231.61.23]:58682 "EHLO ee.oulu.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752817AbZIGX5P (ORCPT ); Mon, 7 Sep 2009 19:57:15 -0400 X-Greylist: delayed 1962 seconds by postgrey-1.27 at vger.kernel.org; Mon, 07 Sep 2009 19:57:14 EDT Date: Tue, 8 Sep 2009 02:24:15 +0300 From: Pekka Pietikainen To: Ingo Molnar Cc: Michael Buesch , Con Kolivas , linux-kernel@vger.kernel.org, Peter Zijlstra , Mike Galbraith , Felix Fietkau Subject: Re: BFS vs. mainline scheduler benchmarks and measurements Message-ID: <20090907232415.GA17182@ee.oulu.fi> References: <20090906205952.GA6516@elte.hu> <200909071716.57722.mb@bu3sch.de> <20090907182629.GA3484@elte.hu> <200909072051.13748.mb@bu3sch.de> <20090907205701.GA8590@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20090907205701.GA8590@elte.hu> User-Agent: Mutt/1.5.19 (2009-01-05) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1296 Lines: 27 On Mon, Sep 07, 2009 at 10:57:01PM +0200, 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 Yay, finally something that's measurable in this thread \o/ Gigabit Ethernet iperf on an Atom or so might be something that shows similar effects yet is debuggable. Anyone feel like taking a shot? That beast doing iperf probably ends up making it go quite close to it's limits (IO, mem bw, cpu). IIRC the routing/bridging performance is something like 40Mbps (depends a lot on the model, corresponds pretty well with the Mhz of the beast). Maybe not totally unlike what make -j16 does to a 1-4 core box? -- 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/