From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrei Warkentin Subject: Re: [[v4] 2/5] MMC: Use CMD23 for multiblock transfers when we can. Date: Mon, 23 May 2011 14:25:27 -0500 Message-ID: References: <1302950458-1969-1-git-send-email-andreiw@motorola.com> <1303870235-29041-1-git-send-email-andreiw@motorola.com> <1303870235-29041-2-git-send-email-andreiw@motorola.com> <1303870235-29041-3-git-send-email-andreiw@motorola.com> <4DD48273.4060402@samsung.com> <4DD5F045.90001@samsung.com> <4DDA55B6.3040708@samsung.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Return-path: Received: from exprod5og106.obsmtp.com ([64.18.0.182]:43297 "EHLO exprod5og106.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933469Ab1EWTZb (ORCPT ); Mon, 23 May 2011 15:25:31 -0400 Received: from DE01MGRG01.AM.MOT-MOBILITY.COM ([10.176.129.42]) by DE01MGRG01.AM.MOT-MOBILITY.COM (8.14.3/8.14.3) with ESMTP id p4NJQ1Oj021480 for ; Mon, 23 May 2011 15:26:01 -0400 (EDT) Received: from mail-ww0-f46.google.com (mail-ww0-f46.google.com [74.125.82.46]) by DE01MGRG01.AM.MOT-MOBILITY.COM (8.14.3/8.14.3) with ESMTP id p4NJPxlM021454 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=OK) for ; Mon, 23 May 2011 15:26:01 -0400 (EDT) Received: by wwb28 with SMTP id 28so6381325wwb.3 for ; Mon, 23 May 2011 12:25:27 -0700 (PDT) In-Reply-To: <4DDA55B6.3040708@samsung.com> Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: Jaehoon Chung Cc: linux-mmc@vger.kernel.org, arindam.nath@amd.com, cjb@laptop.org, arnd@arndb.de, Kyungmin Park , "Gao, Yunpeng" On Mon, May 23, 2011 at 7:40 AM, Jaehoon Chung wrote: > Hi A.. > > I tested your patch..(using CMD23) > my environment is the below. > eMMC card : Sandisk SEM8G (eMMC 4.3+) > buswidth : 4bit (SDR) > AP : C110 > benchmark : IOzone > > I want to know how do you think about this result? > (i can't see your results) > I think that you should use my tool to measure I/O performance. Because I want to see the mins, maxes, average and std dev. Iozone adds way too much noise to the data. You can run it 5 times in a row and get completely different numbers. Please use https://github.com/andreiw/superalign. For a more realistic test you can try performing 20000 sqlite inserts or something of the sort and timing that. A