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 17:05:23 +0400 Sender: linux-ide-owner@vger.kernel.org Message-ID: <200404151705.23753.kos@supportwizard.com> References: <200404150236.05894.kos@supportwizard.com> <200404151440.23858.kos@supportwizard.com> <200404151537.38739.vda@port.imtp.ilyichevsk.odessa.ua> Reply-To: kos@supportwizard.com Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: Received: from smtp.rol.ru ([194.67.21.9]:30430 "EHLO smtp.rol.ru") by vger.kernel.org with ESMTP id S263825AbUDONCo (ORCPT ); Thu, 15 Apr 2004 09:02:44 -0400 Received: from 81.211.110.66.adsl-spb.net.rol.ru ([81.211.110.66]:24451 "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 S17476766AbUDONCm (ORCPT + 1 other); Thu, 15 Apr 2004 17:02:42 +0400 In-Reply-To: <200404151537.38739.vda@port.imtp.ilyichevsk.odessa.ua> Content-Disposition: inline List-Id: linux-ide@vger.kernel.org To: Denis Vlasenko Cc: Lenar =?iso-8859-1?q?L=F5hmus?= , linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org On Thursday 15 April 2004 16:37, Denis Vlasenko wrote: > > /dev/sda: > > setting fs readahead to 8192 > > readahead = 8192 (on) > > Timing buffered disk reads: 84 MB in 3.06 seconds = 27.46 MB/sec > > 27 Mb/s is not 'very' bad for 80Gb drive. > > Can you verify that drive indeed is able to do better > (quick test under Windows is in order)? It would be silly > to try to hunt down problem which do not exist. Here's this drive benchmarks under Windows on almost the same SATA controller: http://www.tomshardware.com/storage/20040123/wd740-01.html actual numbers: http://www.tomshardware.com/storage/20040123/wd740-08.html It appears to be the fastest SATA drive up to the moment, I expected to get something around 60-70 MB/sec > > If problem does exist, try 2.4 kernels. I tried 2.4.25. There is no sata_sil driver there. siimage driver detects the controller but doesn't detect the disk: SiI3112 Serial ATA: IDE controller at PCI slot 00:0f.0 PCI: Found IRQ 12 for device 00:0f.0 PCI: Sharing IRQ 12 with 00:0a.0 PCI: Sharing IRQ 12 with 00:10.2 SiI3112 Serial ATA: chipset revision 2 SiI3112 Serial ATA: not 100% native mode: will probe irqs later ide2: MMIO-DMA , BIOS settings: hde:pio, hdf:pio ide3: MMIO-DMA , BIOS settings: hdg:pio, hdh:pio that's all -- /KoS * A fool and his money are my kind of customer.