Date: Tue, 15 May 2018 07:41:35 +1000 From: Peter Jeremy <peter@rulingia.com> To: Udit agarwal <dev.madaari@gmail.com> Cc: freebsd-questions@freebsd.org, freebsd-arm@freebsd.org, Ilya Bakulin <ilya@bakulin.de>, punitvara <punitvara@gmail.com>, Christian Mauderer <Christian.Mauderer@embedded-brains.de> Subject: Re: Feedback on benchmarking results of SDHCI and MMCCAM driver Message-ID: <20180514214135.GB86457@server.rulingia.com> In-Reply-To: <CAM0bxh9NfaAFmGjxp8nXOPCx5QGFRFMmKPHsxX5jXkUJt%2BG5uw@mail.gmail.com> References: <CAM0bxh9NfaAFmGjxp8nXOPCx5QGFRFMmKPHsxX5jXkUJt%2BG5uw@mail.gmail.com>
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--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 <dev.madaari@gmail.com> 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--
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