Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964793AbWHQKin (ORCPT ); Thu, 17 Aug 2006 06:38:43 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964794AbWHQKim (ORCPT ); Thu, 17 Aug 2006 06:38:42 -0400 Received: from scrub.xs4all.nl ([194.109.195.176]:53959 "EHLO scrub.xs4all.nl") by vger.kernel.org with ESMTP id S964793AbWHQKim (ORCPT ); Thu, 17 Aug 2006 06:38:42 -0400 Date: Thu, 17 Aug 2006 12:32:37 +0200 (CEST) From: Roman Zippel X-X-Sender: roman@scrub.home To: john stultz cc: Andrew Morton , linux-kernel@vger.kernel.org Subject: Re: [NTP 0/9] NTP patches In-Reply-To: <1155769647.6785.67.camel@localhost.localdomain> Message-ID: References: <20060810000146.913645000@linux-m68k.org> <1155769647.6785.67.camel@localhost.localdomain> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1641 Lines: 39 Hi, On Wed, 16 Aug 2006, john stultz wrote: > How much real-world testing have you done with these patches? I've been > running w/ this set of patches for a few days and I've been noticing my > system is having difficulties synching up w/ the NTP server. I tested it on a few machines of course. > I haven't been logging anything, so its currently uncertain data, but > normally I've seen NTP sync the time within 1-2ms in just an hour or so, > however since this morning (~6 hours ago) I'm seeing it still 10ms off. > > I'm going to let it run for the rest of the day then try to bisect the > patches to see where things went wrong. I'll let you know as soon as I > find anything. I would need the loopstats over a few days to really say something about this. It may also depend on the stability of your remote NTP serer. The new code adjusts a little a slower, but should be overall a little more stable. The ntpd does basically "if (!pll_nano) ntv.constant = sys_poll - 4;" to adjust for the difference in behaviour of the two models, but this causes rather fast adjustments. In the NTP4 patch I undo this adjustment for the new model. > I'm going to let it run for the rest of the day then try to bisect the > patches to see where things went wrong. I'll let you know as soon as I > find anything. Well, upto the NTP4 patch the behaviour should be mostly unchanged. bye, Roman - 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/