Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932113AbXAFTzJ (ORCPT ); Sat, 6 Jan 2007 14:55:09 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932121AbXAFTzI (ORCPT ); Sat, 6 Jan 2007 14:55:08 -0500 Received: from einhorn.in-berlin.de ([192.109.42.8]:47732 "EHLO einhorn.in-berlin.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932113AbXAFTzH (ORCPT ); Sat, 6 Jan 2007 14:55:07 -0500 X-Envelope-From: stefanr@s5r6.in-berlin.de Message-ID: <459FFE95.1020403@s5r6.in-berlin.de> Date: Sat, 06 Jan 2007 20:55:01 +0100 From: Stefan Richter User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.8) Gecko/20061202 SeaMonkey/1.0.6 MIME-Version: 1.0 To: Tim Schmielau CC: linux-kernel@vger.kernel.org Subject: Re: 2.6.20-rc3 regression? hdparm shows 1/2...1/3 the throughput References: <459FE2AF.2020507@s5r6.in-berlin.de> In-Reply-To: X-Enigmail-Version: 0.94.0.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1162 Lines: 38 Tim Schmielau wrote: > On Sat, 6 Jan 2007, Stefan Richter wrote: > >> Did anybody else notice this? The result of "hdparm -t" under 2.6.20-rc >> seems to be less than half of what you get on 2.6.19. However, disk I/O >> did *not* get slower according to bonnie++. > > yes. See > http://lkml.org/lkml/2007/1/2/75 > for the solution. > > Tim Thanks. I should have remembered that. # hdparm -tT /dev/hda /dev/hda: Timing cached reads: 10864 MB in 2.00 seconds = 5440.10 MB/sec Timing buffered disk reads: 58 MB in 3.06 seconds = 18.94 MB/sec # cat /sys/block/hda/queue/scheduler noop anticipatory deadline [cfq] # echo anticipatory > /sys/block/hda/queue/scheduler # hdparm -tT /dev/hda /dev/hda: Timing cached reads: 10680 MB in 2.00 seconds = 5347.20 MB/sec Timing buffered disk reads: 148 MB in 3.02 seconds = 49.03 MB/sec -- Stefan Richter -=====-=-=== ---= --==- http://arcgraph.de/sr/ - 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/