From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753312Ab2LKPsY (ORCPT ); Tue, 11 Dec 2012 10:48:24 -0500 Received: from mail.skyhub.de ([78.46.96.112]:33938 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752823Ab2LKPsX (ORCPT ); Tue, 11 Dec 2012 10:48:23 -0500 Date: Tue, 11 Dec 2012 16:48:20 +0100 From: Borislav Petkov To: Alex Shi Cc: Alex Shi , rob@landley.net, mingo@redhat.com, peterz@infradead.org, gregkh@linuxfoundation.org, andre.przywara@amd.com, rjw@sisk.pl, paul.gortmaker@windriver.com, akpm@linux-foundation.org, paulmck@linux.vnet.ibm.com, linux-kernel@vger.kernel.org, pjt@google.com, vincent.guittot@linaro.org, Preeti U Murthy , Arjan van de Ven Subject: Re: [PATCH 0/18] sched: simplified fork, enable load average into LB and power awareness scheduling Message-ID: <20121211154819.GC8873@liondog.tnic> Mail-Followup-To: Borislav Petkov , Alex Shi , Alex Shi , rob@landley.net, mingo@redhat.com, peterz@infradead.org, gregkh@linuxfoundation.org, andre.przywara@amd.com, rjw@sisk.pl, paul.gortmaker@windriver.com, akpm@linux-foundation.org, paulmck@linux.vnet.ibm.com, linux-kernel@vger.kernel.org, pjt@google.com, vincent.guittot@linaro.org, Preeti U Murthy , Arjan van de Ven References: <1355127754-8444-1-git-send-email-alex.shi@intel.com> <50C722AC.3080806@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <50C722AC.3080806@intel.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Dec 11, 2012 at 08:10:20PM +0800, Alex Shi wrote: > Another testing of parallel compress with pigz on Linus' git tree. > results show we get much better performance/power with powersaving and > balance policy: > > testing command: > #pigz -k -c -p$x -r linux* &> /dev/null > > On a NHM EP box > powersaving balance performance > x = 4 166.516 /88 68 170.515 /82 71 165.283 /103 58 > x = 8 173.654 /61 94 177.693 /60 93 172.31 /76 76 This looks funny: so "performance" is eating less watts than "powersaving" and "balance" on NHM. Could it be that the average watts measurements on NHM are not correct/precise..? On SNB they look as expected, according to your scheme. Also, shouldn't you have the shortest compress times with "performance"? > > On a 2 sockets SNB EP box. > powersaving balance performance > x = 4 190.995 /149 35 200.6 /129 38 208.561 /135 35 > x = 8 197.969 /108 46 208.885 /103 46 213.96 /108 43 > x = 16 205.163 /76 64 212.144 /91 51 229.287 /97 44 Ditto here, compress times with "performance" are not the shortest. Or does "performance" mean something else? :-) Thanks. -- Regards/Gruss, Boris. Sent from a fat crate under my desk. Formatting is fine. --