Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1945928AbWANAom (ORCPT ); Fri, 13 Jan 2006 19:44:42 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1945925AbWANAm1 (ORCPT ); Fri, 13 Jan 2006 19:42:27 -0500 Received: from hermes.domdv.de ([193.102.202.1]:29967 "EHLO hermes.domdv.de") by vger.kernel.org with ESMTP id S1945922AbWANAmX (ORCPT ); Fri, 13 Jan 2006 19:42:23 -0500 Message-ID: <43C848C7.1070701@domdv.de> Date: Sat, 14 Jan 2006 01:41:43 +0100 From: Andreas Steinmetz User-Agent: Mozilla Thunderbird 1.0.7 (X11/20051004) X-Accept-Language: en-us, en MIME-Version: 1.0 To: David Lang CC: Sven-Thorsten Dietrich , thockin@hockin.org, Lee Revell , linux-kernel Subject: Re: Dual core Athlons and unsynced TSCs References: <1137178855.15108.42.camel@mindpipe><20060113215609.GA30634@hockin.org> <1137190698.2536.65.camel@localhost.localdomain> In-Reply-To: X-Enigmail-Version: 0.92.1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1707 Lines: 53 David Lang wrote: > On Fri, 13 Jan 2006, Sven-Thorsten Dietrich wrote: > >> 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. > > > more precisely 1/4 KW Hour / day > > $0.01 - $0.02/day (I had to lookup the current rates) > > they probably won't notice. > Well, wait until there's AMD based dual core x86_64 laptops out there (this email being written on a single core x86_64 one). I can already see the faces of the unhappy future owners being told "use idle=poll" when on battery and anyway going deaf by fan noise. (/me ducks and runs) -- Andreas Steinmetz SPAMmers use robotrap@domdv.de - 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/