From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261170AbVFLTTN (ORCPT ); Sun, 12 Jun 2005 15:19:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261160AbVFLTTN (ORCPT ); Sun, 12 Jun 2005 15:19:13 -0400 Received: from cpu1185.adsl.bellglobal.com ([207.236.110.166]:19972 "EHLO mail.rtr.ca") by vger.kernel.org with ESMTP id S262636AbVFLQaF (ORCPT ); Sun, 12 Jun 2005 12:30:05 -0400 Message-ID: <42AC6310.7030809@rtr.ca> Date: Sun, 12 Jun 2005 12:30:08 -0400 From: Mark Lord User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.7) Gecko/20050420 Debian/1.7.7-2 X-Accept-Language: en, en-us MIME-Version: 1.0 To: kallol@nucleodyne.com Cc: linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org Subject: Re: Fwd: Re: Performance figure for sx8 driver References: <20050611021814.riaatwh8ztskw4g4@www.nucleodyne.com> In-Reply-To: <20050611021814.riaatwh8ztskw4g4@www.nucleodyne.com> 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 kallol@nucleodyne.com wrote: > > > Hello Jeff, > How did you verify that performance improved making the > changes those > you suggested? > > hdparm does not show it. My hdparm tool performs a single I/O at a time, disregarding any kernel read-ahead that may be added on. As such, it won't often show the effects of queued commands as well as some other test might. Cheers