Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752450AbZIHWPi (ORCPT ); Tue, 8 Sep 2009 18:15:38 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752012AbZIHWPi (ORCPT ); Tue, 8 Sep 2009 18:15:38 -0400 Received: from depni.sinp.msu.ru ([213.131.7.21]:53260 "EHLO depni.sinp.msu.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751562AbZIHWPh (ORCPT ); Tue, 8 Sep 2009 18:15:37 -0400 From: Serge Belyshev To: Ingo Molnar Cc: Con Kolivas , linux-kernel@vger.kernel.org, Peter Zijlstra , Mike Galbraith Subject: Re: Epic regression in throughput since v2.6.23 References: <20090906205952.GA6516@elte.hu> <87hbvdiogq.fsf@depni.sinp.msu.ru> Date: Tue, 08 Sep 2009 22:15:33 +0000 In-Reply-To: <87hbvdiogq.fsf@depni.sinp.msu.ru> (Serge Belyshev's message of "Tue, 08 Sep 2009 12:57:09 +0000") Message-ID: <873a6xdqwq.fsf@depni.sinp.msu.ru> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 774 Lines: 20 Serge Belyshev writes: >[snip] I've updated the graphs, added kernels 2.6.24..2.6.29: http://img186.imageshack.us/img186/7029/epicmakej4.png And added comparison with best-performing 2.6.23 kernel: http://img34.imageshack.us/img34/7563/epicbfstips.png > > Conclusions are > 1) mainline has severely regressed since v2.6.23 > 2) BFS shows optimal performance at make -jN where N equals number of > h/w threads, while current mainline scheduler performance is far from > optimal in this case. -- 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/