From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760186AbYGQPpo (ORCPT ); Thu, 17 Jul 2008 11:45:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755178AbYGQPph (ORCPT ); Thu, 17 Jul 2008 11:45:37 -0400 Received: from gw.goop.org ([64.81.55.164]:39081 "EHLO mail.goop.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754498AbYGQPpg (ORCPT ); Thu, 17 Jul 2008 11:45:36 -0400 Message-ID: <487F6913.2000602@goop.org> Date: Thu, 17 Jul 2008 08:45:23 -0700 From: Jeremy Fitzhardinge User-Agent: Thunderbird 2.0.0.14 (X11/20080501) MIME-Version: 1.0 To: "Alex Nixon (Intern)" CC: Peter Zijlstra , Ingo Molnar , Linux Kernel Mailing List , Ian Campbell Subject: Re: Large increase in context switch rate References: <487E43D9.7080703@goop.org> <1216286250.5232.67.camel@twins> <487F5F15.4050208@goop.org> <0E902970173AF84089673FA54B7FE78A32906B@lonpexch01.citrite.net> In-Reply-To: <0E902970173AF84089673FA54B7FE78A32906B@lonpexch01.citrite.net> X-Enigmail-Version: 0.95.6 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Alex Nixon (Intern) wrote: > Yeah I've checked - the number of context switches seems to be around > 60k regardless of whether CONFIG_PARAVIRT is switched on, and regardless > of whether it's running in domu or native (-j4 on dual core) > OK, just to be sure we're talking about the same thing, is kernbench displaying the context switch *rate*, or the total number of context switches during the build? Peter is looking at vmstat, which is showing cs/sec. J