From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Ball Subject: Re: CMD23 plumbing and support patchset. Date: Fri, 22 Apr 2011 22:51:32 -0400 Message-ID: References: <1302741523-22276-1-git-send-email-andreiw@motorola.com> <1302950458-1969-1-git-send-email-andreiw@motorola.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from void.printf.net ([89.145.121.20]:43379 "EHLO void.printf.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752955Ab1DWCrk (ORCPT ); Fri, 22 Apr 2011 22:47:40 -0400 In-Reply-To: (Andrei Warkentin's message of "Thu, 21 Apr 2011 22:53:00 -0500") Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: Andrei Warkentin Cc: linux-mmc@vger.kernel.org, arindam.nath@amd.com Hi, On Thu, Apr 21 2011, Andrei Warkentin wrote: >>> Can you give me the manufacturing date? This is pretty interesting. >>> >>> You can see an improvement even if you do something like time block >>> writes (O_DIRECT | O_SYNC, of course). But after all synthetic tests I >>> measured the time it took to do 40000 SQLite insertions and saw >>> something like 30% improvement. >>> >> >> And you're trying this on SDHCI I presume, right? > > Is this on the same board as the other log you sent? Controller is > SDHCI-PXA? If you give me /sys/block/mmcblk0/device/date, > I'll investigate why this improvement isn't helping you out. Yeah, sdhci-pxa: [root@localhost olpc]# cat /sys/block/mmcblk0/device/date 10/2010 Want to give me a benchmark script so that we can compare speeds directly? Thanks, - Chris. -- Chris Ball One Laptop Per Child