From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S275363AbTHSFuK (ORCPT ); Tue, 19 Aug 2003 01:50:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S275384AbTHSFuK (ORCPT ); Tue, 19 Aug 2003 01:50:10 -0400 Received: from mail.cid.net ([193.41.144.34]:49290 "EHLO mail.cid.net") by vger.kernel.org with ESMTP id S275363AbTHSFuG (ORCPT ); Tue, 19 Aug 2003 01:50:06 -0400 Date: Tue, 19 Aug 2003 07:43:27 +0200 From: Stefan Foerster To: Andrew Morton Cc: linux-kernel@vger.kernel.org Subject: Re: Very bad interactivity with 2.6.0 and SCSI disks (aic7xxx) Message-ID: <20030819054327.GA8674@in-ws-001.cid-net.de> References: <20030818013243.GB21665@in-ws-001.cid-net.de> <20030817192103.798994d8.akpm@osdl.org> <20030818054851.GA5252@in-ws-001.cid-net.de> <20030817230325.2887ca49.akpm@osdl.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20030817230325.2887ca49.akpm@osdl.org> X-Now-Playing: Sting - Desert Rose User-Agent: Mutt/1.5.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org [I've sent this mail aleready, but got an error from my MAILER-DAEMON. Perhaps ist was too large vor lkml, so I'm moving the oprofile output to a webserver] * Andrew Morton wrote: > Stefan Foerster wrote: > > * Andrew Morton wrote: > > > Stefan Foerster wrote: > > > A kernel profile would be needed to diagnose this. You could use > > > readprofile, but as it may be an interrupt problem, the NMI-based oprofile > > > output would be better. > > > > Is this procedure documented anywhere? [every information I needed] I did the following steps: opcontrol --setup --vmlinux=/usr/src/linux/vmlinux --event=RETIRED_INSNS:100000:0:1:1 Then I used your shell source: ~/shells/oprofileit dd if=/dev/zero of=test bs=1024 count=1048576 opreport -l /usr/src/linux/vmlinux > /tmp/1 opreport -ld -D /usr/src/linux/vmlinux > /tmp/2 During the dd, again the xmms playing a file from an tmpfs froze and even screen redrawing was very, very slow. The output of these commands kan be found at: http://home.in.tum.de/foerstes/oprofile-1 http://home.in.tum.de/foerstes/oprofile-2 Is this information useful in debugging my problem, or should I go and try again with readprofile or other tools? Ciao, Stefan