From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751645Ab2CEFV6 (ORCPT ); Mon, 5 Mar 2012 00:21:58 -0500 Received: from wolverine01.qualcomm.com ([199.106.114.254]:1681 "EHLO wolverine01.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751267Ab2CEFV5 (ORCPT ); Mon, 5 Mar 2012 00:21:57 -0500 X-IronPort-AV: E=McAfee;i="5400,1158,6639"; a="169100090" Message-ID: In-Reply-To: References: <4934441a17d25c3249556f7bf281b1be.squirrel@www.codeaurora.org> <6669559e86c1d13b27e941ff2acf89d2.squirrel@www.codeaurora.org> Date: Sun, 4 Mar 2012 21:21:57 -0800 (PST) Subject: Re: [PATCH v5 2/2] mmc: core: Support packed command for eMMC4.5 device From: merez@codeaurora.org To: "Saugata Das" Cc: merez@codeaurora.org, "Namjae Jeon" , "Seungwon Jeon" , linux-mmc@vger.kernel.org, "Chris Ball" , linux-kernel@vger.kernel.org User-Agent: SquirrelMail/1.4.17 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT X-Priority: 3 (Normal) Importance: Normal Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > Hi Merez > > On 2 March 2012 19:56, wrote: >> Hi, >> >> Our tests showed that the write packing improved the performance of the >> write sequential operations: >> >> Long write operation: >> ---------------------- >> no-packing: 15.8 MB/s >> packed commands patch (both READ and WRITE packing are enabled): 23.3 >> MB/s >> >> Several parallel write operations (sum of all the write throughputs): >> --------------------------- >> no-packing: 17.1 MB/s >> packed commands patch(both READ and WRITE packing are enabled): 25 MB/s >> >> Parallel long read and long write operations (write throughput): >> ----------------------------------------------------------------- >> no-packing: 12.2 MB/s >> packed commands patch (both READ and WRITE packing are enabled): 16.3 >> MB/s >> >> Parallel short read and long write operations (write throughput): >> ----------------------------------------------------------------- >> no-packing: 15.4 MB/s >> packed commands patch (both READ and WRITE packing are enabled): 16.4 >> MB/s >> >> Several Parallel short read and short write operations (sum of all the >> write throughputs): >> -------------------------------------------------------------------------- >> no-packing: 12.5 MB/s >> packed commands patch (both READ and WRITE packing are enabled): 15.5 >> MB/s >> > > How did you perform the above tests ? The sequential tests were performed with the lmdd application. Thanks, Maya Erez Consultant for Qualcomm Innovation Center, Inc. Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum From mboxrd@z Thu Jan 1 00:00:00 1970 From: merez@codeaurora.org Subject: Re: [PATCH v5 2/2] mmc: core: Support packed command for eMMC4.5 device Date: Sun, 4 Mar 2012 21:21:57 -0800 (PST) Message-ID: References: <4934441a17d25c3249556f7bf281b1be.squirrel@www.codeaurora.org> <6669559e86c1d13b27e941ff2acf89d2.squirrel@www.codeaurora.org> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Return-path: Received: from wolverine01.qualcomm.com ([199.106.114.254]:1681 "EHLO wolverine01.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751267Ab2CEFV5 (ORCPT ); Mon, 5 Mar 2012 00:21:57 -0500 In-Reply-To: Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: Saugata Das Cc: merez@codeaurora.org, Namjae Jeon , Seungwon Jeon , linux-mmc@vger.kernel.org, Chris Ball , linux-kernel@vger.kernel.org > Hi Merez > > On 2 March 2012 19:56, wrote: >> Hi, >> >> Our tests showed that the write packing improved the performance of the >> write sequential operations: >> >> Long write operation: >> ---------------------- >> no-packing: 15.8 MB/s >> packed commands patch (both READ and WRITE packing are enabled): 23.3 >> MB/s >> >> Several parallel write operations (sum of all the write throughputs): >> --------------------------- >> no-packing: 17.1 MB/s >> packed commands patch(both READ and WRITE packing are enabled): 25 MB/s >> >> Parallel long read and long write operations (write throughput): >> ----------------------------------------------------------------- >> no-packing: 12.2 MB/s >> packed commands patch (both READ and WRITE packing are enabled): 16.3 >> MB/s >> >> Parallel short read and long write operations (write throughput): >> ----------------------------------------------------------------- >> no-packing: 15.4 MB/s >> packed commands patch (both READ and WRITE packing are enabled): 16.4 >> MB/s >> >> Several Parallel short read and short write operations (sum of all the >> write throughputs): >> -------------------------------------------------------------------------- >> no-packing: 12.5 MB/s >> packed commands patch (both READ and WRITE packing are enabled): 15.5 >> MB/s >> > > How did you perform the above tests ? The sequential tests were performed with the lmdd application. Thanks, Maya Erez Consultant for Qualcomm Innovation Center, Inc. Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum