Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935316AbWK2HYj (ORCPT ); Wed, 29 Nov 2006 02:24:39 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S935390AbWK2HYj (ORCPT ); Wed, 29 Nov 2006 02:24:39 -0500 Received: from mx2.mail.elte.hu ([157.181.151.9]:27095 "EHLO mx2.mail.elte.hu") by vger.kernel.org with ESMTP id S935316AbWK2HYi (ORCPT ); Wed, 29 Nov 2006 02:24:38 -0500 Date: Wed, 29 Nov 2006 08:21:00 +0100 From: Ingo Molnar To: Daniel Walker Cc: Lee Revell , Fernando Lopez-Lezcano , "Linux-Kernel," Subject: Re: 2.6.19-rc6-rt8: alsa xruns Message-ID: <20061129072100.GA1983@elte.hu> References: <1164743931.15887.34.camel@cmn3.stanford.edu> <1164744757.1701.58.camel@mindpipe> <20061128201444.GB26934@elte.hu> <1164751282.7543.25.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1164751282.7543.25.camel@localhost.localdomain> User-Agent: Mutt/1.4.2.2i X-ELTE-SpamScore: -4.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-4.5 required=5.9 tests=ALL_TRUSTED,AWL,BAYES_00 autolearn=no SpamAssassin version=3.0.3 -3.3 ALL_TRUSTED Did not pass through any untrusted hosts -2.6 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] 1.4 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: 1090 Lines: 24 * Daniel Walker wrote: > > i fixed this in -rt8: the latency tracer now uses the time of day > > clocksource - pmtimer in this case. (that means function tracing is > > slower than with the TSC, but latency figures are more reliable.) > > I have a patch set to make the using the clocksources a little nicer.. > Is there anything I should add to that interface to help enable > latency tracing, or are you satisfied with using the timekeeping > clocksource? It might get constrictive after a while. please talk to John and Thomas about GTOD interfaces. Right now the solution used by the latency tracer is working out pretty OK - but if something better comes along i can use that too. It's not a burning issue though, unless you know of some bug. (i'm not sure what you mean by it becoming constrictive) 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/