From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752529Ab0IOJWT (ORCPT ); Wed, 15 Sep 2010 05:22:19 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:52198 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751703Ab0IOJWS (ORCPT ); Wed, 15 Sep 2010 05:22:18 -0400 Date: Wed, 15 Sep 2010 11:22:05 +0200 From: Ingo Molnar To: Mike Galbraith Cc: Mathieu Desnoyers , LKML , Peter Zijlstra , Linus Torvalds , Andrew Morton , Steven Rostedt , Thomas Gleixner , Tony Lindgren Subject: Re: [RFC PATCH] sched: START_NICE feature (temporarily niced forks) (v3) Message-ID: <20100915092205.GG16593@elte.hu> References: <20100914202503.GA1496@Krystal> <1284539831.21727.6.camel@marge.simson.net> <1284541405.22863.8.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: <1284541405.22863.8.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: > Tangent: cgroups with classification user/pgid > > taskset -c 3 ./wakeup-latency& sleep 30 && killall wakeup-latency > (taskset -c 3 make -j10 running) > > maximum latency: 256.5 µs > average latency: 25.7 µs > missed timer events: 0 > > Rather spiffy for this case. Ouch, nothing beats proper segregation of workloads. It would be _really_ nice to get that automatically somehow, for make -j jobs. Perhaps a per tty auto-cgroup-classification kernel feature? We cannot really rely on distros to pull this off. Thanks, Ingo