Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261798AbVASReX (ORCPT ); Wed, 19 Jan 2005 12:34:23 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261802AbVASRcU (ORCPT ); Wed, 19 Jan 2005 12:32:20 -0500 Received: from canuck.infradead.org ([205.233.218.70]:46854 "EHLO canuck.infradead.org") by vger.kernel.org with ESMTP id S261796AbVASRbs (ORCPT ); Wed, 19 Jan 2005 12:31:48 -0500 Subject: Re: [PATCH] dynamic tick patch From: Arjan van de Ven To: Tony Lindgren Cc: Pavel Machek , George Anzinger , john stultz , Andrea Arcangeli , Zwane Mwaikambo , Con Kolivas , Martin Schwidefsky , linux-kernel@vger.kernel.org In-Reply-To: <20050119171106.GA14545@atomide.com> References: <20050119000556.GB14749@atomide.com> <20050119113642.GA1358@elf.ucw.cz> <20050119171106.GA14545@atomide.com> Content-Type: text/plain Date: Wed, 19 Jan 2005 18:30:49 +0100 Message-Id: <1106155850.6310.161.camel@laptopd505.fenrus.org> Mime-Version: 1.0 X-Mailer: Evolution 2.0.2 (2.0.2-3) Content-Transfer-Encoding: 7bit X-Spam-Score: 4.1 (++++) X-Spam-Report: SpamAssassin version 2.63 on canuck.infradead.org summary: Content analysis details: (4.1 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.3 RCVD_NUMERIC_HELO Received: contains a numeric HELO 1.1 RCVD_IN_DSBL RBL: Received via a relay in list.dsbl.org [] 2.5 RCVD_IN_DYNABLOCK RBL: Sent directly from dynamic IP address [80.57.133.107 listed in dnsbl.sorbs.net] 0.1 RCVD_IN_SORBS RBL: SORBS: sender is listed in SORBS [80.57.133.107 listed in dnsbl.sorbs.net] X-SRS-Rewrite: SMTP reverse-path rewritten from by canuck.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1262 Lines: 31 On Wed, 2005-01-19 at 09:11 -0800, Tony Lindgren wrote: > * Pavel Machek [050119 03:32]: > > Hi! > > > > > As this patch is related to the VST/High-Res timers, there > > > are probably various things that can be merged. I have not > > > yet looked at what all could be merged. > > > > > > I'd appreciate some comments and testing! > > > > Good news is that it does seem to reduce number of interrupts. Bad > > news is that time now runs faster (like "sleep 10" finishes in ~5 > > seconds) and that I could not measure any difference in power > > consumption. > > Thanks for trying it out. I have quite accurate time here on my > systems, and sleep works as it should. I wonder what's happening on > your system? If you have a chance, could you please post the results > from following simple tests? tsc is dangerous for this btw; several cpus go either slower or stop tsc entirely during hlt... eg when idle. I would suggest to not include a tsc driver for this (otherwise really cool) feature. - 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/