Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751480AbXIYInf (ORCPT ); Tue, 25 Sep 2007 04:43:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750785AbXIYIn2 (ORCPT ); Tue, 25 Sep 2007 04:43:28 -0400 Received: from e33.co.us.ibm.com ([32.97.110.151]:56810 "EHLO e33.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750754AbXIYIn1 (ORCPT ); Tue, 25 Sep 2007 04:43:27 -0400 Date: Tue, 25 Sep 2007 14:23:29 +0530 From: Srivatsa Vaddagiri To: Mike Galbraith Cc: Ingo Molnar , linux-kernel@vger.kernel.org, Peter Zijlstra , Dhaval Giani , Dmitry Adamushko , Andrew Morton Subject: Re: [git] CFS-devel, latest code Message-ID: <20070925085329.GJ26289@linux.vnet.ibm.com> Reply-To: vatsa@linux.vnet.ibm.com References: <20070924214537.GA18980@elte.hu> <1190700652.6482.7.camel@Homer.simpson.net> <1190705759.11910.10.camel@Homer.simpson.net> <1190709207.11226.6.camel@Homer.simpson.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1190709207.11226.6.camel@Homer.simpson.net> User-Agent: Mutt/1.5.11 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1471 Lines: 37 On Tue, Sep 25, 2007 at 10:33:27AM +0200, Mike Galbraith wrote: > > Darn, have news: latency thing isn't dead. Two busy loops, one at nice > > 0 pinned to CPU0, and one at nice 19 pinned to CPU1 produced the > > latencies below for nice -5 Xorg. Didn't kill the box though. > > > > se.wait_max : 10.068169 > > se.wait_max : 7.465334 > > se.wait_max : 135.501816 > > se.wait_max : 0.884483 > > se.wait_max : 144.218955 > > se.wait_max : 128.578376 > > se.wait_max : 93.975768 > > se.wait_max : 4.965965 > > se.wait_max : 113.655533 > > se.wait_max : 4.301075 > > > > sched_debug (attached) is.. strange. Mike, Do you have FAIR_USER_SCHED turned on as well? Can you send me your .config pls? Also how do you check se.wait_max? > Disabling CONFIG_FAIR_GROUP_SCHED fixed both. Latencies of up to 336ms > hit me during the recompile (make -j3), with nothing else running. > Since reboot, latencies are, so far, very very nice. I'm leaving it > disabled for now. -- Regards, vatsa - 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/