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 -- Pengutronix e.K. | Wolfram Sang | Industrial Linux Solutions | http://www.pengutronix.de/ |
Attachment:
signature.asc
Description: Digital signature
