From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp.fullrate.dk ([90.185.1.42]:54960 "EHLO smtp.fullrate.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757572Ab1EaS3J (ORCPT ); Tue, 31 May 2011 14:29:09 -0400 Received: from arvinserver1.home.troels.arvin.dk (1608ds2-ksa.0.fullrate.dk [90.184.71.151]) by smtp.fullrate.dk (Postfix) with ESMTP id 13A579CE3E for ; Tue, 31 May 2011 20:22:11 +0200 (CEST) Received: from localhost (arvinserver1.home.troels.arvin.dk [127.0.0.1]) by arvinserver1.home.troels.arvin.dk (Postfix) with ESMTP id 07114108122 for ; Tue, 31 May 2011 20:22:10 +0200 (CEST) Received: from arvinserver1.home.troels.arvin.dk ([127.0.0.1]) by localhost (arvinserver1.home.troels.arvin.dk [127.0.0.1]) (amavisd-new, port 10024) with LMTP id y2dkRaJoZYpp for ; Tue, 31 May 2011 20:22:08 +0200 (CEST) Received: from kurt-IV.home.troels.arvin.dk (kurt-IV.home.troels.arvin.dk [192.168.1.9]) by arvinserver1.home.troels.arvin.dk (Postfix) with ESMTP id 934F8108106 for ; Tue, 31 May 2011 20:22:08 +0200 (CEST) Message-ID: <4DE531D0.40600@arvin.dk> Date: Tue, 31 May 2011 20:22:08 +0200 From: Troels Arvin MIME-Version: 1.0 Subject: Unaligned AIO/DIO Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: fio-owner@vger.kernel.org List-Id: fio@vger.kernel.org To: fio@vger.kernel.org Hello, Running fio 1.55 on RHEL 6.1 x86_64 with a multipath FC storage backend on an EXT4 file system. Some minutes after starting fio, I see the following in syslog: kernel: EXT4-fs (dm-28): Unaligned AIO/DIO on inode 4063238 by fio; performance will be poor. Should I be worried? Is there something wrong with my storage layout? Or am I using fio in strange way? My job file: [changed-from-iometer-file-access-server] bssplit=512/10:1k/5:2k/5:4k/60:8k/2:16k/4:32k/4:64k/10 rw=randrw rwmixread=70 direct=1 size=10g ioengine=libaio iodepth=256 write_bw_log write_lat_log numjobs=6 -- Regards, Troels Arvin http://troels.arvin.dk/