From mboxrd@z Thu Jan  1 00:00:00 1970
From: Wolfram Sang <w.sang@pengutronix.de>
Subject: Re: [PATCH v3] mmc: mxs-mmc: add mmc host driver for i.MX23/28
Date: Tue, 22 Feb 2011 17:36:06 +0100
Message-ID: <20110222163606.GK2755@pengutronix.de>
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To: Arnd Bergmann <arnd@arndb.de>
Cc: Shawn Guo <shawn.guo@freescale.com>, linux-mmc@vger.kernel.org, cjb@laptop.org, linux@arm.linux.org.uk, linux-arm-kernel@lists.infradead.org


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On Tue, Feb 22, 2011 at 05:15:07PM +0100, Arnd Bergmann wrote:
> On Tuesday 22 February 2011, Wolfram Sang wrote:
> > # mount -t vfat /dev/mmcblk0p1 /mnt
> > # dd if=3D/mnt/test.dat of=3D/tmp/a bs=3D1024
> > # umount /mnt
> > # ./dd --version
> > dd (coreutils) 8.5
>=20
> In general, you should try to rule out file system, garbage collection,
> partitioning and cache effects.

Yes, right, I am aware of that (well, most of it ;)). I simplified my
testcase here, because I was sure by previous tests it was only
dependent on the frequency requested by the card. Remember, I wasn't
after maximum values but chasing a difference in read performance of two
magnitudes.


Thanks,

   Wolfram

--=20
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

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