From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758390Ab0JSL46 (ORCPT ); Tue, 19 Oct 2010 07:56:58 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:43793 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758037Ab0JSL45 (ORCPT ); Tue, 19 Oct 2010 07:56:57 -0400 Date: Tue, 19 Oct 2010 13:56:48 +0200 From: Ingo Molnar To: Mike Galbraith Cc: LKML , Peter Zijlstra , Linus Torvalds , Mathieu Desnoyers Subject: Re: [RFC/RFT PATCH] sched: automated per tty task groups Message-ID: <20101019115648.GD25371@elte.hu> References: <1287479765.9920.9.camel@marge.simson.net> <1287487757.24189.40.camel@marge.simson.net> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <1287487757.24189.40.camel@marge.simson.net> User-Agent: Mutt/1.5.20 (2009-08-17) X-ELTE-SpamScore: -2.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.0 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.5 -2.0 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Mike Galbraith wrote: > Using Mathieu Desnoyers' wakeup-latency testcase (attached): > > With taskset -c 3 make -j 10 running.. > > taskset -c 3 ./wakeup-latency& sleep 30;killall wakeup-latency > > without: > maximum latency: 42963.2 µs > average latency: 9077.0 µs > missed timer events: 0 > > with: > maximum latency: 4160.7 µs > average latency: 149.4 µs > missed timer events: 0 > > Patch makes a big difference in desktop feel under hefty load here. That's really nice! Could this feature realistically do block IO isolation as well? It's always annoying when some big IO job is making the desktop jerky. Especially as your patch is selecting the block cgroup feature already: + select BLK_CGROUP Thanks, Ingo