Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S270338AbTGRTnB (ORCPT ); Fri, 18 Jul 2003 15:43:01 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S270342AbTGRTnB (ORCPT ); Fri, 18 Jul 2003 15:43:01 -0400 Received: from holomorphy.com ([66.224.33.161]:38791 "EHLO holomorphy") by vger.kernel.org with ESMTP id S270338AbTGRTm5 (ORCPT ); Fri, 18 Jul 2003 15:42:57 -0400 Date: Fri, 18 Jul 2003 12:57:47 -0700 From: William Lee Irwin III To: Mike Kravetz Cc: Erich Focht , LSE , linux-kernel Subject: Re: [Lse-tech] [patch 2.6.0-test1] per cpu times Message-ID: <20030718195747.GU8121@holomorphy.com> Mail-Followup-To: William Lee Irwin III , Mike Kravetz , Erich Focht , LSE , linux-kernel References: <200307181835.42454.efocht@hpce.nec.com> <20030718111850.C1627@w-mikek2.beaverton.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20030718111850.C1627@w-mikek2.beaverton.ibm.com> Organization: The Domain of Holomorphy User-Agent: Mutt/1.5.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1080 Lines: 24 On Fri, Jul 18, 2003 at 11:18:50AM -0700, Mike Kravetz wrote: > On a somewhat related note ... > We (Big Blue) have a performance reporting application that > would like to know how long a task sits on a runqueue before > it is actually given the CPU. In other words, it wants to > know how long the 'runnable task' was delayed due to contention > for the CPU(s). Of course, one could get an overall feel for > this based on total runqueue length. However, this app would > really like this info on a per-task basis. > Does anyone else think this type of info would be useful? > A patch to compute/export this info should be straight forward > to implement. I wrote something to collect the standard queueing statistics a while back but am not sure what I did with it. I think Rick Lindsley might still have a copy around. -- wli - 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/