Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755086AbXHZUPu (ORCPT ); Sun, 26 Aug 2007 16:15:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752776AbXHZUPm (ORCPT ); Sun, 26 Aug 2007 16:15:42 -0400 Received: from mx2.rz.ruhr-uni-bochum.de ([134.147.64.30]:39502 "HELO mx2.rz.ruhr-uni-bochum.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1752660AbXHZUPl (ORCPT ); Sun, 26 Aug 2007 16:15:41 -0400 X-Greylist: delayed 401 seconds by postgrey-1.27 at vger.kernel.org; Sun, 26 Aug 2007 16:15:40 EDT Subject: Problems with disc-performance and libata From: Oliver Janscheidt To: linux-kernel@vger.kernel.org Content-Type: text/plain Date: Sun, 26 Aug 2007 22:08:57 +0200 Message-Id: <1188158937.6896.4.camel@WG4> Mime-Version: 1.0 X-Mailer: Evolution 2.10.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2220 Lines: 53 Hi, I'm using a Lenovo Thinkpad with TOSHIBA MK1234GS HD and MATSHITA DVD-RAM UJ-850 on 82801GBM/GHM (ICH7 Family) Serial ATA Storage Controller IDE. The Kernel is a 2.6.22.1 from Kernel.org (with 2.6.23-rc1- and hdaps-queue-freezing-patch). sudo hdparm -t /dev/scd0 gives Timing buffered disk reads: 2 MB in 4.47 seconds = 457.75 kB/sec sudo hdparm -t /dev/sda gives Timing buffered disk reads: 102 MB in 3.04 seconds = 33.51 MB/sec which is a quite poor performance and makes any streaming impossible. Obviously UDMA is working correctly as dmesg | grep UDMA says: [ 43.636590] ata1: SATA max UDMA/133 cmd 0xffffc20004612500 ctl 0x0000000000000000 bmdma 0x0000000000000000 irq 314 [ 43.636595] ata2: SATA max UDMA/133 cmd 0xffffc20004612580 ctl 0x0000000000000000 bmdma 0x0000000000000000 irq 314 [ 43.636599] ata3: SATA max UDMA/133 cmd 0xffffc20004612600 ctl 0x0000000000000000 bmdma 0x0000000000000000 irq 314 [ 43.636603] ata4: SATA max UDMA/133 cmd 0xffffc20004612680 ctl 0x0000000000000000 bmdma 0x0000000000000000 irq 314 [ 44.177980] ata1.00: ATA-7: TOSHIBA MK1234GSX, AH002E, max UDMA/100 [ 44.179192] ata1.00: configured for UDMA/100 [ 44.326918] ata5: PATA max UDMA/133 cmd 0x00000000000101f0 ctl 0x00000000000103f6 bmdma 0x0000000000011880 irq 14 [ 44.326922] ata6: PATA max UDMA/133 cmd 0x0000000000010170 ctl 0x0000000000010376 bmdma 0x0000000000011888 irq 15 [ 44.571970] ata5.00: ATAPI: MATSHITADVD-RAM UJ-850, RB01, max UDMA/33 [ 44.738552] ata5.00: configured for UDMA/33 [ 0.610332] ata5.00: configured for UDMA/33 [ 0.750296] ata1.00: configured for UDMA/100 Is there any solution for that problem or at least a workaround? I also tried to recompile the kernel as recommended in the official libata-faq ( http://linux-ata.org/faq.html ) but the system stuck when booting the root-partition. Booting with combined_mode=libata or combined_mode=ide didn't affect the performance, too. Thanks in advance, Oli - 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/