Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759291Ab1EMNNd (ORCPT ); Fri, 13 May 2011 09:13:33 -0400 Received: from mailout-de.gmx.net ([213.165.64.23]:59036 "HELO mailout-de.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1758584Ab1EMNNc (ORCPT ); Fri, 13 May 2011 09:13:32 -0400 X-Authenticated: #14349625 X-Provags-ID: V01U2FsdGVkX1/Oo1tVtyLOB1v2+TT0A3TeAwpnnPkG9EyRRe67fI 8Fx0aDEqKMuMTi Subject: Re: Sched_autogroup and niced processes From: Mike Galbraith To: Ingo Molnar Cc: Peter Zijlstra , Yong Zhang , Carl-Johan Kjellander , linux-kernel@vger.kernel.org In-Reply-To: <20110513100411.GA21022@elte.hu> References: <1305273950.15080.7.camel@marge.simson.net> <20110513082250.GB13647@elte.hu> <1305276066.2561.1.camel@twins> <20110513090537.GH13647@elte.hu> <1305277666.2561.9.camel@twins> <20110513092933.GL13647@elte.hu> <1305279990.2466.4.camel@twins> <20110513100411.GA21022@elte.hu> Content-Type: text/plain; charset="UTF-8" Date: Fri, 13 May 2011 15:13:26 +0200 Message-ID: <1305292406.27263.20.camel@marge.simson.net> Mime-Version: 1.0 X-Mailer: Evolution 2.32.1 Content-Transfer-Encoding: 7bit X-Y-GMX-Trusted: 0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1228 Lines: 50 On Fri, 2011-05-13 at 12:04 +0200, Ingo Molnar wrote: > Still, the other important problem is that we still seem to have a bug, even > with the cgroup set to low prio seti@home is sucking up CPU resources ... I don't see how. Other than the expected nice 19 overrun when nice 0 group blocks, it works fine on my little Q6600 box. time make -j4 vmlinux (cache hot) real 2m22.996s user 7m6.887s sys 0m48.999s echo 0 > sched_autogroup_enabled time make -j4 vmlinux real 2m17.052s (darn, no free lunch) user 7m5.483s sys 0m49.415s echo 1 > sched_autogroup_enabled simultaneous massive_intr 8 9999 in nice 19 autogroup and time make -j4 vmlinux in a nice 0 autogroup real 2m30.863s user 7m5.363s sys 0m47.359s 142.996/150.863 = .947 (a tad low) repeat with 2 kbuild tasks/core to cut nice 0 group's idle time time make -j8 vmlinux real 2m24.925s user 7m16.327s sys 0m50.807s 142.996/144.925 = .986 (all better) -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/