From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konstantin Sobolev Subject: Re: poor sata performance on 2.6 Date: Thu, 15 Apr 2004 14:40:23 +0400 Sender: linux-ide-owner@vger.kernel.org Message-ID: <200404151440.23858.kos@supportwizard.com> References: <200404150236.05894.kos@supportwizard.com> <407E35E0.3080902@vision.ee> Reply-To: kos@supportwizard.com Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from smtp.rol.ru ([194.67.21.9]:34558 "EHLO smtp.rol.ru") by vger.kernel.org with ESMTP id S261804AbUDOKhs (ORCPT ); Thu, 15 Apr 2004 06:37:48 -0400 Received: from 81.211.110.66.adsl-spb.net.rol.ru ([81.211.110.66]:7808 "EHLO 81.211.110.66.adsl-spb.net.rol.ru" smtp-auth: TLS-CIPHER: TLS-PEER-CN1: ) by gnome03.net.rol.ru with ESMTP id S17474253AbUDOKhm convert rfc822-to-8bit (ORCPT + 1 other); Thu, 15 Apr 2004 14:37:42 +0400 In-Reply-To: <407E35E0.3080902@vision.ee> Content-Disposition: inline List-Id: linux-ide@vger.kernel.org To: Lenar =?iso-8859-1?q?L=F5hmus?= Cc: linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org On Thursday 15 April 2004 11:12, Lenar L=F5hmus wrote: > >for sata_sil: > > > >/dev/sda: > > Timing buffer-cache reads: 1412 MB in 2.00 seconds =3D 705.05 MB= /sec > > Timing buffered disk reads: 84 MB in 3.06 seconds =3D 27.43 MB/= sec > > > >So my old IDE HDD appears to be considerably faster. Expected result= s were > >55-70MB/s. > > With same hard drive connected to 3ware S-ATA controller I got > 40-50MB/sec with hdparm on 2.6.4 and 2.6.5. Then > tried to hdparm -a 8192 /dev/sda, and got this: > > /dev/sda: > Timing buffer-cache reads: 2056 MB in 2.00 seconds =3D 1027.13 MB= /sec > Timing buffered disk reads: 266 MB in 3.00 seconds =3D 88.53 MB/s= ec > > So you may try that switch, maybe helps. unfortunately it doesn't: /dev/sda: setting fs readahead to 8192 readahead =3D 8192 (on) Timing buffered disk reads: 84 MB in 3.06 seconds =3D 27.46 MB/sec --=20 /KoS * Searching for light in the darkness of insanity. =20