Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760263AbXHGJD4 (ORCPT ); Tue, 7 Aug 2007 05:03:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755275AbXHGJDr (ORCPT ); Tue, 7 Aug 2007 05:03:47 -0400 Received: from smtp35.poczta.interia.pl ([80.48.65.35]:47383 "EHLO smtp4.poczta.interia.pl" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1755089AbXHGJDq (ORCPT ); Tue, 7 Aug 2007 05:03:46 -0400 Message-ID: <46B83560.2060107@interia.pl> Date: Tue, 07 Aug 2007 11:03:28 +0200 From: =?UTF-8?B?UmFmYcWCIEJpbHNraQ==?= User-Agent: Thunderbird 2.0.0.6 (X11/20070802) MIME-Version: 1.0 To: Dimitrios Apostolou Cc: linux-kernel@vger.kernel.org Subject: Re: high system cpu load during intense disk i/o References: <200708031903.10063.jimis@gmx.net> <200708051903.12414.jimis@gmx.net> <46B60FB7.8030301@interia.pl> <200708052142.14630.jimis@gmx.net> <46B748DE.1060108@interia.pl> <46B773F6.7060603@gmx.net> <46B79CDE.2030709@interia.pl> <46B7C18E.1050008@gmx.net> In-Reply-To: <46B7C18E.1050008@gmx.net> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-EMID: a025aacc Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1571 Lines: 39 >> Just tested (plain curiosity). >> via82cxxx average result @533MHz: >> /dev/hda: >> Timing cached reads: 232 MB in 2.00 seconds = 115.93 MB/sec >> Timing buffered disk reads: 64 MB in 3.12 seconds = 20.54 MB/sec >> pata_via average result @533MHz: >> /dev/sda: >> Timing cached reads: 234 MB in 2.01 seconds = 116.27 MB/sec >> Timing buffered disk reads: 82 MB in 3.05 seconds = 26.92 MB/sec > > Interesting! I haven't tried libata myself on that system, I only have > remote access to it so I'm a bit afraid... Just change root=/dev/hda1 to append="root=/dev/sda1" in lilo.conf. And change fstab. If You don't change "/" then system will go into single user mode after reboot. > Rafal, I hope that system you run hdparm on isn't the archlinux one! Is > it easy to load an old kernel (even two years old) and do the same test? > If it is, please let me know of the results. I don't think it is possible. If I remember right kernel can't be older then glibc kernel headers. Btw. My disk is 20GB 2,5" ATA33. I wonder how 26MB/s is possible. I don't expect more. > > Thanks in advance, > Dimitris Regards Rafał ---------------------------------------------------------------------- Wszystko czego potrzebujesz latem: kremy do opalania, stroje kapielowe, maly romans >>>http://link.interia.pl/f1b15 - 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/