From owner-freebsd-arm@freebsd.org Mon May 14 21:51:02 2018 Return-Path: Delivered-To: freebsd-arm@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 6B2A6E7A1E3; Mon, 14 May 2018 21:51:02 +0000 (UTC) (envelope-from dev.madaari@gmail.com) Received: from mail-wr0-x233.google.com (mail-wr0-x233.google.com [IPv6:2a00:1450:400c:c0c::233]) (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 D898B76A10; Mon, 14 May 2018 21:51:01 +0000 (UTC) (envelope-from dev.madaari@gmail.com) Received: by mail-wr0-x233.google.com with SMTP id v60-v6so13856942wrc.7; Mon, 14 May 2018 14:51:01 -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=qU/LWNjlr/nB/Zr6yCg7SbxuvRt9U8qENZJ4OH/yaO8=; b=ov6/BLDiE2qtqOyFbX3MByjhPviOj9/TnH5NtyA/mJwEJzbUdpgzVsT/jsZXPRSt9K A2xHRoZgcD1ZI0EZugIMoE7UuKAE7Jz9ntfFalQz515WYItSSmvxPsXx7JnrBnkrZfWq 0NSRdCh/uBXfJ2qwgPaeADtu+MsCAYaW2bjOnPQ9qtJfPvkoN4LNqS+geB+sQvrMtvoc 2h7a0/LYVbXtRzug999bfel2aY3xMmyHiOJfyAY0QCxtY6fQiVsqjhmWHeNSpa2oiXJ8 EBhdvOZ3ZXwGkO6w5qMdtMlkiQcEfH7GbklxzaTrg4HqyPCBdOKZcPpHKAgXuvH7soOw aasA== 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=qU/LWNjlr/nB/Zr6yCg7SbxuvRt9U8qENZJ4OH/yaO8=; b=mH15EparI4mMaSLyugi7Fd/6Uif3jSWsOWFv717zn1MhYQFbsoQ/CthxhAZV4Cp4OB ZGekUqR/VLaN5tD3J4NA2pxVl/ej6yRA9+hoXN0iMM9eoee6u+B8hUQkv4KwdkwAv85s VbqvBZV+NrWQmgp/XP4EYhRSrdBWX67I86gVoGLgL7p1Ez1pRwCbyZSCMLigKzVVy5AT D2c8Ode7sZfmfSaudDOF0VsuBlVUGuAvYfocJy40CNjMBPIQCT07vQoFs1iRJdq16VwZ 9+AFviqP79g62Ms+tVHGfeM7kwfKide2yxbQwsszeJoK5LDwpVXmnKvmMN1a5e3lEdLO 4FBA== X-Gm-Message-State: ALKqPwfbbTZp1P4nYwGQea0BFrV+NfsFJ8MJqn2kNLwEVazSJFQ3/y+0 bfjOu9Z1RKxzYu7VPn4NtH0MiE9w7dtTRwxW35M= X-Google-Smtp-Source: AB8JxZo490TIa9Cmww4oZOAvPeJ7CyZdEM5ll89ikNUeDZmwV7Y8arZHu0KOwiE6vkqNA1MwWFxsIH9KzJGCIyv7bfs= X-Received: by 2002:adf:e943:: with SMTP id m3-v6mr7971422wrn.185.1526334660901; Mon, 14 May 2018 14:51:00 -0700 (PDT) MIME-Version: 1.0 Received: by 10.28.198.132 with HTTP; Mon, 14 May 2018 14:51:00 -0700 (PDT) In-Reply-To: <20180514214135.GB86457@server.rulingia.com> References: <20180514214135.GB86457@server.rulingia.com> From: Udit agarwal Date: Tue, 15 May 2018 03:21:00 +0530 Message-ID: Subject: Re: Feedback on benchmarking results of SDHCI and MMCCAM driver To: Peter Jeremy Cc: freebsd-questions@freebsd.org, freebsd-arm@freebsd.org Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.26 X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 14 May 2018 21:51:02 -0000 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? > 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. Regards, Udit > > -- > Peter Jeremy >