From owner-freebsd-arm@freebsd.org Mon May 14 21:42:05 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 971D1E79A72; Mon, 14 May 2018 21:42:05 +0000 (UTC) (envelope-from peter@rulingia.com) Received: from vtr.rulingia.com (vtr.rulingia.com [IPv6:2001:19f0:5801:ebe:5400:1ff:fe53:30fd]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "vtr.rulingia.com", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id D2A1F73D9B; Mon, 14 May 2018 21:42:04 +0000 (UTC) (envelope-from peter@rulingia.com) Received: from server.rulingia.com (ppp59-167-167-3.static.internode.on.net [59.167.167.3]) by vtr.rulingia.com (8.15.2/8.15.2) with ESMTPS id w4ELfePV007372 (version=TLSv1.2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256 verify=OK); Tue, 15 May 2018 07:41:46 +1000 (AEST) (envelope-from peter@rulingia.com) X-Bogosity: Ham, spamicity=0.000000 Received: from server.rulingia.com (localhost.rulingia.com [127.0.0.1]) by server.rulingia.com (8.15.2/8.15.2) with ESMTPS id w4ELfZga087108 (version=TLSv1.2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256 verify=NO); Tue, 15 May 2018 07:41:35 +1000 (AEST) (envelope-from peter@server.rulingia.com) Received: (from peter@localhost) by server.rulingia.com (8.15.2/8.15.2/Submit) id w4ELfZIm087107; Tue, 15 May 2018 07:41:35 +1000 (AEST) (envelope-from peter) Date: Tue, 15 May 2018 07:41:35 +1000 From: Peter Jeremy To: Udit agarwal Cc: freebsd-questions@freebsd.org, freebsd-arm@freebsd.org, Ilya Bakulin , punitvara , Christian Mauderer Subject: Re: Feedback on benchmarking results of SDHCI and MMCCAM driver Message-ID: <20180514214135.GB86457@server.rulingia.com> References: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="ZGiS0Q5IWpPtfppv" Content-Disposition: inline In-Reply-To: X-PGP-Key: http://www.rulingia.com/keys/peter.pgp User-Agent: Mutt/1.9.5 (2018-04-13) 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 21:42:05 -0000 --ZGiS0Q5IWpPtfppv Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable 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? 2) How did you prepare the SD card prior to each write test? Flash write t= ests are extremely sensitive to hidden move/rewrite and erase cycles performed b= y the flash translation layer. 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 implementa= tion. --=20 Peter Jeremy --ZGiS0Q5IWpPtfppv Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQKTBAEBCgB9FiEE7rKYbDBnHnTmXCJ+FqWXoOSiCzQFAlr6AoZfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldEVF QjI5ODZDMzA2NzFFNzRFNjVDMjI3RTE2QTU5N0EwRTRBMjBCMzQACgkQFqWXoOSi CzQ5Lg//UIGLgGQp5CpVXQ5D5Ck+arNzQp6k/tdsB+0Grld1CDVnuRbToyImEgiL sDGFeTtlgtPWkXUTBCY0PlyqZiDMJq6iKPp/X3Ra+ryqPcDcj7s7DJzUkQr5vV9c eEm+cv7nwWJeiV1M/SS18T3lW6f7f234BvIVaf3R/XFPxujmg2V5WW6eVFSLEFeA kWLlAIKCY5PSJaEAOGsRuwOiNk51BIC9qWIUv1JWK3NFPAclbh3FctZcmEU8Me/4 v2STYxrYlLYpEI2C6WLeXPo8j3l9MToK3gwYNGsubmdsylvQJn4Jpj7mGVMM5FEQ tVlnhWNTyIrqjuB6ohBeJWODDQMke/Cs1YoRNC2vSaH4vx0AgovkSX0RPwlukpOj 1aADlQlibLfSmLdCmwASt4pJG4Y3Ft4m4lbcPMVpQ2RrodEdjqq6xcd5gsCndzuY ElYJpwJ+KSin5E1s+h3uEnNXC3ILVL6uEUuBkaj15ryQ7xXN3EFH+NNKWMYc9qwb 0/8nOjaFHdPz/GGHK93Lw8uRkrURLyeqhINJUNjJBpdW2haxvKvzpO8G7Kh06snX Dma//9NBmtqDEDSnX8PLVZmh1847Hh9J4mn/HZcKNMux1JVv/P5784O18ejnx4Uj NB1qojz/TgN9H4HBNLWYXBkduqFlcfcLKn0BsU0QwYhJG6ZcR3g= =nc/V -----END PGP SIGNATURE----- --ZGiS0Q5IWpPtfppv--