Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964965AbWA3Unv (ORCPT ); Mon, 30 Jan 2006 15:43:51 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964971AbWA3Unv (ORCPT ); Mon, 30 Jan 2006 15:43:51 -0500 Received: from mx1.redhat.com ([66.187.233.31]:25759 "EHLO mx1.redhat.com") by vger.kernel.org with ESMTP id S964965AbWA3Unu (ORCPT ); Mon, 30 Jan 2006 15:43:50 -0500 Message-ID: <43DE7A70.8030004@sgi.com> Date: Mon, 30 Jan 2006 15:43:28 -0500 From: Prarit Bhargava User-Agent: Mozilla Thunderbird 1.0 (X11/20041206) X-Accept-Language: en-us, en MIME-Version: 1.0 To: "Luck, Tony" CC: Ingo Molnar , Bjorn Helgaas , Ingo Molnar , linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, Andrew Morton , Linus Torvalds Subject: Re: boot-time slowdown for measure_migration_cost References: <200601271403.27065.bjorn.helgaas@hp.com> <20060130172140.GB11793@elte.hu> <20060130185301.GA4622@agluck-lia64.sc.intel.com> <20060130192438.GA29129@elte.hu> <20060130200026.GA5081@agluck-lia64.sc.intel.com> In-Reply-To: <20060130200026.GA5081@agluck-lia64.sc.intel.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1057 Lines: 37 Tony, > > > Might it be wise to see whether the 2% variation that I saw can be > repeated on some other architecture? Can someone else try > this patch and post the before/after values for migration_cost from dmesg? > Ask and ye shall receive ... on the 64p/64G system. Pristine: [ 9.942253] Brought up 64 CPUs [ 9.942904] Total of 64 processors activated (143654.91 BogoMIPS). [ 9.943995] build_sched_domains: start [ 32.108439] migration_cost=0,32232,39021 [ 37.894391] build_sched_domains: end Patched: [ 0.001307] Calibrating delay loop... 2244.60 BogoMIPS (lpj=4489216) [ 9.942308] Brought up 64 CPUs [ 9.942812] Total of 64 processors activated (143654.91 BogoMIPS). [ 18.080441] migration_cost=0,31934,38750 [ 23.865993] checking if image is initramfs... it is P. - 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/