From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ingo Molnar Subject: Re: [PATCHSET 1][PATCH 0/6] Filesystem AIO read/write Date: Thu, 28 Dec 2006 10:52:05 +0100 Message-ID: <20061228095205.GG24765@elte.hu> References: <20061227153855.GA25898@in.ibm.com> <20061228082308.GA4476@in.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-aio@kvack.org, akpm@osdl.org, drepper@redhat.com, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, jakub@redhat.com Return-path: Received: from mx2.mail.elte.hu ([157.181.151.9]:55067 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932805AbWL1Jyj (ORCPT ); Thu, 28 Dec 2006 04:54:39 -0500 To: Suparna Bhattacharya Content-Disposition: inline In-Reply-To: <20061228082308.GA4476@in.ibm.com> Sender: linux-fsdevel-owner@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org * Suparna Bhattacharya wrote: > The following is a sampling of comparative aio-stress results with the > patches (each run starts with uncached files): > > --------------------------------------------- > > aio-stress throughput comparisons (in MB/s): > > file size 1GB, record size 64KB, depth 64, ios per iteration 8 > max io_submit 8, buffer alignment set to 4KB > 4 way Pentium III SMP box, Adaptec AIC-7896/7 Ultra2 SCSI, 40 MB/s > Filesystem: ext2 > > ---------------------------------------------------------------------------- > Buffered (non O_DIRECT) > Vanilla Patched O_DIRECT > ---------------------------------------------------------------------------- > Vanilla Patched > Random-Read 10.08 23.91 18.91, 18.98 > Random-O_SYNC-Write 8.86 15.84 16.51, 16.53 > Sequential-Read 31.49 33.00 31.86, 31.79 > Sequential-O_SYNC-Write 8.68 32.60 31.45, 32.44 > Random-Write 31.09 (19.65) 30.90 (19.65) > Sequential-Write 30.84 (28.94) 30.09 (28.39) the numbers look very convincing to me! Ingo