From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265311AbUBEPkb (ORCPT ); Thu, 5 Feb 2004 10:40:31 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265320AbUBEPkb (ORCPT ); Thu, 5 Feb 2004 10:40:31 -0500 Received: from mail-05.iinet.net.au ([203.59.3.37]:36834 "HELO mail.iinet.net.au") by vger.kernel.org with SMTP id S265311AbUBEPk1 (ORCPT ); Thu, 5 Feb 2004 10:40:27 -0500 Message-ID: <402263E7.6010903@cyberone.com.au> Date: Fri, 06 Feb 2004 02:40:23 +1100 From: Nick Piggin User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040122 Debian/1.6-1 X-Accept-Language: en MIME-Version: 1.0 To: Mattias Wadenstein CC: linux-kernel@vger.kernel.org Subject: Re: Performance issue with 2.6 md raid0 References: In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Mattias Wadenstein wrote: >Greetings. > >While testing a file server to store a couple of TB in resonably large >files (>1G), I noticed an odd performance behaviour with the md raid0 in a >pristine 2.6.2 kernel as compared to a 2.4.24 kernel. > >When striping two md raid5:s, instead of going from about 160-200MB/s for >a single raid5 to 300M/s for the raid0 in 2.4.24, the 2.6.2 kernel gave >135M/s in single stream read performance. > > Can you try booting with elevator=deadline please?