Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932286AbZJHOQE (ORCPT ); Thu, 8 Oct 2009 10:16:04 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758074AbZJHOQD (ORCPT ); Thu, 8 Oct 2009 10:16:03 -0400 Received: from mail.gmx.net ([213.165.64.20]:35360 "HELO mail.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1754295AbZJHOQC (ORCPT ); Thu, 8 Oct 2009 10:16:02 -0400 X-Authenticated: #14349625 X-Provags-ID: V01U2FsdGVkX1/x4ggT+Vnx5qdrH8KTu7chSREMOp4FTgwGGykUAC gROc26opjvg75+ Subject: Re: [.32-rc3] scheduler: iwlagn consistently high in "waiting for CPU" From: Mike Galbraith To: Arjan van de Ven Cc: Frans Pop , Linux Kernel Mailing List , Ingo Molnar , Peter Zijlstra , linux-wireless@vger.kernel.org In-Reply-To: <20091008064521.07fae137@infradead.org> References: <200910051500.55875.elendil@planet.nl> <200910061749.02805.elendil@planet.nl> <200910071910.53907.elendil@planet.nl> <200910072034.57511.elendil@planet.nl> <1255001062.7500.1.camel@marge.simson.net> <20091008064521.07fae137@infradead.org> Content-Type: text/plain Date: Thu, 08 Oct 2009 16:15:12 +0200 Message-Id: <1255011312.7294.3.camel@marge.simson.net> Mime-Version: 1.0 X-Mailer: Evolution 2.24.1.1 Content-Transfer-Encoding: 7bit X-Y-GMX-Trusted: 0 X-FuHaFi: 0.67 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 783 Lines: 22 On Thu, 2009-10-08 at 06:45 -0700, Arjan van de Ven wrote: > On Thu, 08 Oct 2009 13:24:22 +0200 > Mike Galbraith wrote: > > Latencytop was accounting uninterruptible and interruptible sleep > > time up to 5ms, which is not the latency the user is looking for. > > it is for everything but the scheduler latency! > > latencytop wants to show where you're waiting for disk, etc etc. > that's not "time on runqueue". > > for the scheduler delays a whole different codepath is used! That explains.. a few things. -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/