Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750919AbVJKDpc (ORCPT ); Mon, 10 Oct 2005 23:45:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750941AbVJKDpc (ORCPT ); Mon, 10 Oct 2005 23:45:32 -0400 Received: from xproxy.gmail.com ([66.249.82.202]:2754 "EHLO xproxy.gmail.com") by vger.kernel.org with ESMTP id S1750906AbVJKDpb convert rfc822-to-8bit (ORCPT ); Mon, 10 Oct 2005 23:45:31 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=HR6phmDN2Q2QJ4OMBTtsY4S7LgzGSAEuNvqmpYw12NzqNVWiZ3I3f6Y1iIvpTFPw6AZL+l/4SMm+0ZgTixKlfrqfCQ3EFjVX8GJfhUvMoK/FiHCr4ZVqmNX7Mp0b1O1TQiVMnVhiSEudEXRkl2UntQQ1Di0iA8arpsqg6n8QX7E= Message-ID: <5bdc1c8b0510102045u7e4bc9eeld5b690b5e96c4a5f@mail.gmail.com> Date: Mon, 10 Oct 2005 20:45:30 -0700 From: Mark Knecht To: Daniel Walker Subject: Re: Latency data - 2.6.14-rc3-rt13 Cc: linux-kernel@vger.kernel.org, Ingo Molnar , Lee Revell In-Reply-To: <5bdc1c8b0510101649s221ab437scc49d6a49269d6b@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Content-Disposition: inline References: <5bdc1c8b0510101316k23ff64e2i231cdea7f11e8553@mail.gmail.com> <1128977359.18782.199.camel@c-67-188-6-232.hsd1.ca.comcast.net> <5bdc1c8b0510101412n714c4798v1482254f6f8e0386@mail.gmail.com> <5bdc1c8b0510101428o475d9dbct2e9bdcc6b46418c9@mail.gmail.com> <1128980674.18782.211.camel@c-67-188-6-232.hsd1.ca.comcast.net> <5bdc1c8b0510101509w4c74028apb6e69746b1b8b65b@mail.gmail.com> <1128983301.18782.215.camel@c-67-188-6-232.hsd1.ca.comcast.net> <5bdc1c8b0510101633lc45fbf8gd2677e5646dc6f93@mail.gmail.com> <5bdc1c8b0510101649s221ab437scc49d6a49269d6b@mail.gmail.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 841 Lines: 22 On 10/10/05, Mark Knecht wrote: > > ( softirq-timer/0-3 |#0): new 3997 us maximum-latency critical section. So the root cause of this 4mS delay is the 250Hz timer. If I change the system to use the 1Khz timer then the time in this section drops, as expected, to 1mS. ( softirq-timer/0-3 |#0): new 998 us maximum-latency critical section. => started at timestamp 121040020: => ended at timestamp 121041019: So, thinking very interesting here I think. Back to the drawing board as to my xruns. - Mark - 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/