Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752132AbZI0UGS (ORCPT ); Sun, 27 Sep 2009 16:06:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751436AbZI0UGS (ORCPT ); Sun, 27 Sep 2009 16:06:18 -0400 Received: from fg-out-1718.google.com ([72.14.220.158]:50615 "EHLO fg-out-1718.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750952AbZI0UGR (ORCPT ); Sun, 27 Sep 2009 16:06:17 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=v65u6U3LpaEUPPV+CChtiTmqRYDeUbbhxJDwjVJVFFrSOA5rfs46UWL/rO/Q21CYu3 VO8Z0Em2QtUBUQuGBLvPds7h5Mz2Dku4c0oFBDqYwRvN1cT6hZ3VCuqKV/+X1GvOpfCJ GndSySZV/E4Z+sQ78ihIEUGjBwyHtxurGZ24I= MIME-Version: 1.0 In-Reply-To: References: Date: Sun, 27 Sep 2009 22:06:21 +0200 Message-ID: Subject: Re: sched regression introduced by NO_NEW_FAIR_SLEEPERS From: drago01 To: kernel list Cc: mingo@redhat.com, Chuck Ebbert Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1144 Lines: 30 On Sun, Sep 27, 2009 at 9:47 PM, drago01 wrote: > Hi, > > Chuck has backported some scheduler patches from 2.6.32 to the fedora kernel. > > I did the following test to test the new scheduler (cpu is a core i7 > 920 4 cores + HT). > > run 8 "md5sum /dev/urandom" task and try to use the desktop (compiz). > > The result was that moving windows or rotating the cube is very slow. > (same happens with pure metacity but is is worse in compiz). > > Mounting debugfs and doing "echo NEW_FAIR_SLEEPERS > sched_features" > results into a useable desktop while the 8 md5sum tasks are running > (ie. the system behaves as if they where not running at all from an > interactivity pov). > > > P.S: please CC me when replying. > OK, tried on a "vanilla 2.6.30.8 scheduler" I can reproduce this by toggling NEW_FAIR_SLEEPERS on/off. (So it was not a side effect of other scheduler patches) -- 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/