Russ Dill wrote:
On Mon, Apr 6, 2009 at 12:41 AM, Artem Bityutskiy <dedekind@xxxxxxxxx> wrote:
David Hagood wrote:
Well, that's not what I would have expected - I would have thought
reads on POP would have been faster than that, and cheaper - the SD
being the same speed but less CPU is surprising.
1. As Russ and David said, OneNAND driver does not really
use DMA, because the I/O is done in 2K chunks, and this
is just too small piece of data for DMA.
All very relevant, but just to avoid confusion; the tests were
performed on a Beagleboard with 256MB of Micron NAND.
Ok, sorry. The CRC part should be relevant.
The bulk_read part may also be relevant if your HW is
able to read multiple NAND pages faster than reading
them one-by-one. The compression links should be
helpful for compressor selection.
--
Best Regards,
Artem Bityutskiy (Артём Битюцкий)
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