Re: [PATCH v3] mmc: mxs-mmc: add mmc host driver for i.MX23/28

Wolfram Sang
2011-02-22T16:36:10Z

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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=/mnt/test.dat of=/tmp/a bs=1024
> > # umount /mnt
> > # ./dd --version
> > dd (coreutils) 8.5
>
> 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

--
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