Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1423008AbWAMWSX (ORCPT ); Fri, 13 Jan 2006 17:18:23 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1423015AbWAMWSX (ORCPT ); Fri, 13 Jan 2006 17:18:23 -0500 Received: from gateway-1237.mvista.com ([12.44.186.158]:55022 "EHLO hermes.mvista.com") by vger.kernel.org with ESMTP id S1423008AbWAMWSW (ORCPT ); Fri, 13 Jan 2006 17:18:22 -0500 Subject: Re: Dual core Athlons and unsynced TSCs From: Sven-Thorsten Dietrich To: David Lang Cc: thockin@hockin.org, Lee Revell , linux-kernel In-Reply-To: References: <1137178855.15108.42.camel@mindpipe> <20060113215609.GA30634@hockin.org> Content-Type: text/plain Organization: MontaVista Software, Inc. Date: Fri, 13 Jan 2006 14:18:18 -0800 Message-Id: <1137190698.2536.65.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.2.3 (2.2.3-2.fc4) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1366 Lines: 43 On Fri, 2006-01-13 at 14:05 -0800, David Lang wrote: > On Fri, 13 Jan 2006 thockin@hockin.org wrote: > > > On Fri, Jan 13, 2006 at 01:18:35PM -0800, David Lang wrote: > >> Lee, the last time I saw this discussion I thought it was identified that > >> the multiple cores (or IIRC the multiple chips in a SMP motherboard) would > >> only get out of sync when power management calls were made (hlt or > >> switching the c-state). IIRC the workaround that was posted then was to > >> just disable these in the kernel build. > > > > not using 'hlt' when idling means that you spend 10s of Watts more power > > on mostly idle systems. > > true, but for people who need better time accruacy then the other > workaround this may be very acceptable. > 1/4 KW / day for time synchronisation. The power company would love that. > David Lang > -- *********************************** Sven-Thorsten Dietrich Real-Time Software Architect MontaVista Software, Inc. 1237 East Arques Ave. Sunnyvale, CA 94085 Phone: 408.992.4515 Fax: 408.328.9204 http://www.mvista.com Platform To Innovate *********************************** - 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/