Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750818AbWCUVS7 (ORCPT ); Tue, 21 Mar 2006 16:18:59 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751156AbWCUVS7 (ORCPT ); Tue, 21 Mar 2006 16:18:59 -0500 Received: from mx2.mail.elte.hu ([157.181.151.9]:63957 "EHLO mx2.mail.elte.hu") by vger.kernel.org with ESMTP id S1750818AbWCUVS6 (ORCPT ); Tue, 21 Mar 2006 16:18:58 -0500 Date: Tue, 21 Mar 2006 22:16:53 +0100 From: Ingo Molnar To: "K.R. Foley" Cc: linux-kernel@vger.kernel.org Subject: Re: 2.6.16-rt1 Message-ID: <20060321211653.GA3090@elte.hu> References: <20060320085137.GA29554@elte.hu> <441F8017.4040302@cybsft.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <441F8017.4040302@cybsft.com> User-Agent: Mutt/1.4.2.1i X-ELTE-SpamScore: -2.6 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.6 required=5.9 tests=ALL_TRUSTED,AWL,BAYES_50 autolearn=no SpamAssassin version=3.0.3 -3.3 ALL_TRUSTED Did not pass through any untrusted hosts 0.0 BAYES_50 BODY: Bayesian spam probability is 40 to 60% [score: 0.5000] 0.7 AWL AWL: From: address is in the auto white-list X-ELTE-VirusStatus: clean Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 675 Lines: 21 * K.R. Foley wrote: > I haven't had a chance to look into it yet but this combination brings > with it a significant latency regression, at least as measured by the > rtc histogram stuff. can you also measure it via rtc_wakeup, a'ka: chrt -f -p 98 `pidof 'IRQ 8'` ./rtc_wakeup -f 8192 -t 100000 ? I have just tried it, and -rt4 looks pretty good on the latency front (with all debugging disabled). Ingo - 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/