Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761359AbZFPSq0 (ORCPT ); Tue, 16 Jun 2009 14:46:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755967AbZFPSqT (ORCPT ); Tue, 16 Jun 2009 14:46:19 -0400 Received: from mx2.redhat.com ([66.187.237.31]:36102 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754730AbZFPSqT (ORCPT ); Tue, 16 Jun 2009 14:46:19 -0400 Message-ID: <4A37E7DB.7030100@redhat.com> Date: Tue, 16 Jun 2009 14:43:39 -0400 From: Casey Dahlin User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1b3pre) Gecko/20090513 Fedora/3.0-2.3.beta2.fc11 Thunderbird/3.0b2 MIME-Version: 1.0 To: Ralf Gross CC: linux-kernel@vger.kernel.org Subject: Re: io-scheduler tuning for better read/write ratio References: <20090616154342.GA7043@p15145560.pureserver.info> <4A37CB2A.6010209@davidnewall.com> <20090616184027.GB7043@p15145560.pureserver.info> In-Reply-To: <20090616184027.GB7043@p15145560.pureserver.info> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 666 Lines: 19 On 06/16/2009 02:40 PM, Ralf Gross wrote: > David Newall schrieb: >> Ralf Gross wrote: >>> write throughput is much higher than the read throughput (40 MB/s >>> read, 90 MB/s write). > > Hm, but I get higher read throughput (160-200 MB/s) if I don't write > to the device at the same time. > > Ralf How specifically are you testing? It could depend a lot on the particular access patterns you're using to test. --CJD -- 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/