From owner-freebsd-questions@freebsd.org Mon May 14 23:22:48 2018 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 28963E7F790; Mon, 14 May 2018 23:22:48 +0000 (UTC) (envelope-from russ.haley@gmail.com) Received: from mail-lf0-x22c.google.com (mail-lf0-x22c.google.com [IPv6:2a00:1450:4010:c07::22c]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 7EE716D507; Mon, 14 May 2018 23:22:47 +0000 (UTC) (envelope-from russ.haley@gmail.com) Received: by mail-lf0-x22c.google.com with SMTP id z142-v6so20500036lff.5; Mon, 14 May 2018 16:22:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=iuX7qNmCxonodKH9SQXDhRtl8oC0p+1SVHqvfIOQ0+A=; b=kEXuijM28x3U4A4kZD9e+8z+aMjDngdl3NposaPimr0AZRer8RWfoAXoGqa27SPNFt IHQ+yI8ZkouJYjqcuaDAZGGDs0HqMRK7r5EUxnSBsykJEhTaQhs/GrcKHJGdI9z5j4oc 5swzLeY+gL8QpTZXqlp/KfJ3dM6nVrho8ckZ+zIT8K5VnzKDgRgK/wZffp7ZGzkaU3y/ prnArvFlu82qR8X/953xHujIZqAf+MBTKMPlMnz99ndjhUWGt1mBsgYhwIYkqE4imV80 7tkCHjj9GEApQgdyIsVNJad8H7W0R6KKmgDS1UQDEAK8BN5pEEC5jLPYtOC/kTsRSn/z mLhg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=iuX7qNmCxonodKH9SQXDhRtl8oC0p+1SVHqvfIOQ0+A=; b=cEiO1g2xSLoHOMBvI2rdzg67EcGw3xobXGypB1GEYP7Lm2H1MQoeUBZGS3RmgUgOD8 a4KCcZpeQqPgSOJqdwlZkwgoudaUQ3RcjeZVidROuQ/ujw4HMDQREZUk4DCftoQJYSac Ci/+2axKimbp4q4z2BFo7/sr7DxNXahNgR9qkkLOGN4UtOHJAKEyB9zsDHyHFDtG/9QW gPwtIcsl8hld8t5kRoBhUQSeCWOYlP8Td38t1FZnjBdYbfassnZwL869ZAeu6CBdUEG8 SI8ci+ttHhkCgqCiODxsBp36AXRnB42H+W5UhjBJDgKKntE7Dbh5vpOTOmcrrCX33tbq avEw== X-Gm-Message-State: ALKqPweG6g7UCQLKNHPbt49QeM3Mc+LIqDkoBRYv4tpxhTQXhF9OPwon eju0mLuX354vk9drVUB+ofcGLtuPLiLqUYQkRh4= X-Google-Smtp-Source: AB8JxZpyg4r37t4X1wJQPTNSGRZh6d84ugMlizDwq9nR4iiACzZ8QydfhDfyxXUy/ZA/cmgC0DBwjOlBMSSkaaR5TmQ= X-Received: by 2002:a2e:3e0c:: with SMTP id l12-v6mr5979043lja.23.1526340166231; Mon, 14 May 2018 16:22:46 -0700 (PDT) MIME-Version: 1.0 Received: by 10.46.152.16 with HTTP; Mon, 14 May 2018 16:22:45 -0700 (PDT) In-Reply-To: References: <20180514214135.GB86457@server.rulingia.com> From: Russell Haley Date: Mon, 14 May 2018 16:22:45 -0700 Message-ID: Subject: Re: Feedback on benchmarking results of SDHCI and MMCCAM driver To: Udit agarwal Cc: Peter Jeremy , freebsd-arm , freebsd-questions@freebsd.org Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.26 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 14 May 2018 23:22:48 -0000 On Mon, May 14, 2018 at 4:18 PM, Russell Haley wrote: > > > On Mon, May 14, 2018 at 2:51 PM, Udit agarwal > wrote: > >> On Tue, May 15, 2018 at 3:11 AM, Peter Jeremy wrote: >> >> > On 2018-May-15 02:48:43 +0530, Udit agarwal >> wrote: >> > >I have conducted several sd card benchmarking tests on FreeBSD 11.1, >> with >> > >both SDHCI and the newly incorporated MMCCAM driver to compare their >> > >performance under different conditions. >> > >> > Some questions: >> > 1) How reproduceable are the results? Have you performed the test >> > multiple times >> > to check for variance? >> > The images that Udit is using for his tests can be made available for > verification if that's desirable (we have a webserver available). His blogs > are very good as well. > Sorry, sent before adding the blog address: http://81.4.107.225/wordpress/ > > > > > >> Yes, i have carried these tests multiple time and the results are pretty >> consistent upto 0.1MBPS. >> >> > 2) How did you prepare the SD card prior to each write test? Flash >> write >> > tests >> > are extremely sensitive to hidden move/rewrite and erase cycles >> performed >> > by the >> > flash translation layer. >> > >> Before each test, I freshly recreated the filesystem to remove any trace >> of >> the previous tests. Moreover, I have mounted/unmounted the device to >> purge >> any data in the cache. >> >> > 3) Have you tried different SD cards from different manufacturers to see >> > if the >> > drivers happen to interact well or badly with the specific flash >> > implementation. >> > >> No, currently i havn't experimented with different sd cards. True, it >> would >> be interesting to figure out the interaction of the driver with different >> flash implementations. I'll perform these tests ASAP. >> > > I'll just point out that Udits SGOC project has nothing to do with the > flash implementation of the cards. Udit, I would hesitate to go down the > road of multiple card tests unless you have a great deal of spare time. > There are far more pertinent questions that can be asked about the variance > between SDHCI and SDIO implementations. There is still the little detail of > porting to RTEMS too. :) > > >> Regards, >> Udit >> >> > >> > -- >> > Peter Jeremy >> > >> _______________________________________________ >> freebsd-arm@freebsd.org mailing list >> https://lists.freebsd.org/mailman/listinfo/freebsd-arm >> To unsubscribe, send any mail to "freebsd-arm-unsubscribe@freebsd.org" >> > >