Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754768AbYBRF0Y (ORCPT ); Mon, 18 Feb 2008 00:26:24 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751305AbYBRF0O (ORCPT ); Mon, 18 Feb 2008 00:26:14 -0500 Received: from e28smtp06.in.ibm.com ([59.145.155.6]:42856 "EHLO e28esmtp06.in.ibm.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751264AbYBRF0M (ORCPT ); Mon, 18 Feb 2008 00:26:12 -0500 Message-ID: <47B91615.3040407@linux.vnet.ibm.com> Date: Mon, 18 Feb 2008 10:52:29 +0530 From: Balbir Singh Reply-To: balbir@linux.vnet.ibm.com Organization: IBM User-Agent: Thunderbird 2.0.0.9 (X11/20071115) MIME-Version: 1.0 To: "Zhang, Yanmin" CC: vatsa@linux.vnet.ibm.com, LKML , Ingo Molnar , Peter Zijlstra Subject: Re: 2.6.25-rc1: volanoMark 45% regression References: <1202895028.3027.27.camel@ymzhang> <47B2BC2C.80100@linux.vnet.ibm.com> <20080213120708.GA16231@linux.vnet.ibm.com> <1202974901.3027.58.camel@ymzhang> <1203067505.3027.178.camel@ymzhang> <47B91008.8050505@linux.vnet.ibm.com> <1203311505.3027.187.camel@ymzhang> In-Reply-To: <1203311505.3027.187.camel@ymzhang> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1359 Lines: 41 Zhang, Yanmin wrote: > On Mon, 2008-02-18 at 10:26 +0530, Balbir Singh wrote: >> Zhang, Yanmin wrote: >>>>> Did you have >>>>> CONFIG_FAIR_USER_SCHED enabled in both cases? >>>> Yes. >>>> >>>> CONFIG_FAIR_GROUP_SCHED=y >>>> CONFIG_FAIR_USER_SCHED=y >>>> >> Interesting that you have CONFIG_FAIR_USER_SCHED. Do you have any other users on >> the system (are they running anything at the time of the benchmark)? > No. As for volanoMark, I start volanoMark both server and client processes while > starting some system measurement tools such like vmstat/iostat/sar. All the processes > run under the same user. > Ok, so the bandwidth is not split between users, which is very good. I assume the same user is root? > >> Could you >> turn off CONFIG_FAIR_USER_SCHED and turn on CONFIG_FAIR_GROUP_SCHED. > I will try. > >> I am going >> to run some tests with 2.6.25-rc2 and Volanomark and see how that goes. > Pls. set /proc/sys/kernel/sched_compat_yield=1 before starting test. Thanks for the tip, I would have definitely missed this one -- Warm Regards, Balbir Singh Linux Technology Center IBM, ISTL -- 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/