Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261765AbVAYAfr (ORCPT ); Mon, 24 Jan 2005 19:35:47 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261763AbVAYAeN (ORCPT ); Mon, 24 Jan 2005 19:34:13 -0500 Received: from e32.co.us.ibm.com ([32.97.110.130]:32242 "EHLO e32.co.us.ibm.com") by vger.kernel.org with ESMTP id S261779AbVAYAdw (ORCPT ); Mon, 24 Jan 2005 19:33:52 -0500 Subject: Re: [RFC][PATCH] new timeofday core subsystem (v. A2) From: john stultz To: Christoph Lameter Cc: lkml , Tim Schmielau , George Anzinger , albert@users.sourceforge.net, Ulrich Windl , Dominik Brodowski , David Mosberger , Andi Kleen , paulus@samba.org, schwidefsky@de.ibm.com, keith maanthey , Patricia Gaughen , Chris McDermott , Max Asbock , mahuja@us.ibm.com, Nishanth Aravamudan , Darren Hart , "Darrick J. Wong" , Anton Blanchard In-Reply-To: References: <1106607089.30884.10.camel@cog.beaverton.ibm.com> <1106611416.30884.22.camel@cog.beaverton.ibm.com> Content-Type: text/plain Date: Mon, 24 Jan 2005 16:33:42 -0800 Message-Id: <1106613222.30884.34.camel@cog.beaverton.ibm.com> Mime-Version: 1.0 X-Mailer: Evolution 2.0.2 (2.0.2-3) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 899 Lines: 22 On Mon, 2005-01-24 at 16:08 -0800, Christoph Lameter wrote: > On Mon, 24 Jan 2005, john stultz wrote: > > Yep, performance is a big concern. Re-working ntp_scale() is still on my > > TODO list. I just didn't get to it in this release. > > This is a hopeless endeavor if you look at the function. > Throw ntp_scale out and calculate a scaling factor during the ticks. At > tick time then you may forward the clock a few ns in order to correct it > otherwise monkey around with the scaling factor. We talked about this last time. I do intend to re-work ntp_scale() so its not a function call, much as you describe above. hopelessly endeavoring, -john - 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/