From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752023Ab1HFG7U (ORCPT ); Sat, 6 Aug 2011 02:59:20 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:37455 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750917Ab1HFG7T (ORCPT ); Sat, 6 Aug 2011 02:59:19 -0400 Date: Sat, 6 Aug 2011 08:58:20 +0200 From: Ingo Molnar To: Yinghai Lu Cc: Jack Steiner , Robin Holt , tglx@linutronix.de, davej@redhat.com, yinghan@google.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2] x86: Reduce clock calibration time during slave cpu startup Message-ID: <20110806065820.GF13220@elte.hu> References: <20110727135730.GA17717@sgi.com> <20110727140523.GA24206@redhat.com> <20110727141527.GA8453@sgi.com> <20110727155200.GA25381@redhat.com> <20110801184542.GA3939@sgi.com> <20110805104635.GB13055@elte.hu> <20110805131638.GA27779@sgi.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-ELTE-SpamScore: -1.9 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.9 required=5.9 tests=AWL,BAYES_00 autolearn=no SpamAssassin version=3.3.1 -2.0 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0001] 0.1 AWL AWL: From: address is in the auto white-list Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Yinghai Lu wrote: > On Fri, Aug 5, 2011 at 6:16 AM, Jack Steiner wrote: > > Aside from the bogus comment (I'll send a V3 with a fixed comment), does the patch > > look ok. > > Several months ago, Robin said that he will test updated version > > [PATCH] x86: Make calibrate_delay run in parallel. > > so any reason that you sgi guyes stop that path? Running calibration in parallel is pretty stupid: cores/threads might impact each other and there might be a lot of avoidable noise in the results. Thanks, Ingo