From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263818AbUEXBwk (ORCPT ); Sun, 23 May 2004 21:52:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263824AbUEXBwj (ORCPT ); Sun, 23 May 2004 21:52:39 -0400 Received: from web90003.mail.scd.yahoo.com ([66.218.94.61]:7511 "HELO web90003.mail.scd.yahoo.com") by vger.kernel.org with SMTP id S263818AbUEXBvx (ORCPT ); Sun, 23 May 2004 21:51:53 -0400 Message-ID: <20040524015153.32010.qmail@web90003.mail.scd.yahoo.com> Date: Sun, 23 May 2004 18:51:53 -0700 (PDT) From: Phy Prabab Subject: Re: Help understanding slow down To: William Lee Irwin III , Jakob Oestergaard , linux-kernel@vger.kernel.org In-Reply-To: <20040524012828.GK1833@holomorphy.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Okay, so ran the test with vmstat running. I ran it capturing every 1 sec. Here is an excert: procs memory swap io system cpu r b swpd free buff cache si so bi bo in cs us sy id wa 1 0 0 8153848 17000 82348 0 0 0 0 4568 4028 6 16 78 0 0 1 0 8154168 17008 82340 0 0 0 160 4596 4079 7 17 76 1 1 0 0 8153848 17008 82340 0 0 0 0 4511 3998 7 16 76 0 1 0 0 8153912 17008 82340 0 0 0 0 4460 3952 7 14 79 0 1 0 0 8153784 17016 82332 0 0 0 0 4437 3962 7 16 77 0 1 0 0 8153528 17016 82332 0 0 0 0 4444 3927 7 14 78 0 1 1 0 8153784 17024 82392 0 0 0 144 4399 3895 7 15 77 1 0 0 0 8153592 17024 82392 0 0 0 0 4367 3821 7 15 78 0 1 0 0 8153848 17024 82392 0 0 0 0 4393 3926 6 16 78 0 1 0 0 8153528 17024 82460 0 0 0 0 4438 3960 8 14 78 0 1 0 0 8154040 17024 82460 0 0 0 0 4415 3912 6 15 78 0 1 1 0 8153720 17032 82452 0 0 0 140 4457 3953 7 15 77 1 1 0 0 8153784 17032 82452 0 0 0 0 4437 3889 7 14 79 0 0 0 0 8153784 17040 82444 0 0 0 0 4398 3903 8 15 77 0 1 0 0 8153464 17040 82444 0 0 0 0 4398 3902 7 14 79 0 0 0 0 8153528 17040 82444 0 0 0 0 4447 3922 6 17 77 0 0 1 0 8153720 17052 82432 0 0 0 144 4490 3960 6 16 77 1 0 0 0 8153656 17056 82428 0 0 0 0 4449 3954 7 15 78 0 --- William Lee Irwin III wrote: > On Mon, May 24, 2004 at 03:25:53AM +0200, Jakob > Oestergaard wrote: > > Eh, not if I read the numbers right: > > 2.6.7-p1: 24.86user 51.77system 2:58.87elapsed > 42%CPU > > 24.86 + 51.77 = 76.63 seconds on CPU, 102.24 > seconds of waiting > > 2.4.21: 28.68user 34.98system 1:12.34elapsed > 87%CPU > > 28.68 + 34.98 = 63.66 seconds on CPU, 8.68 seconds > of waiting > > So, 2.6.7-p1 spends 16.79 seconds more in the > kernel as you observed, > > but it spends 93.56 seconds more waiting for I/O > (or whatever). > > Unless I'm totally missing something, the wait > seems to be the > > regression. > > I'm sorry, you're right. Let's start by looking into > IO activity. > Phy, could you log the output of vmstat(1) during > the runs? > > > -- 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/ __________________________________ Do you Yahoo!? Yahoo! Domains – Claim yours for only $14.70/year http://smallbusiness.promotions.yahoo.com/offer