kirill wrote:
> Hi!
> Recently I've upgraded internal cf on my c3000. So now I have a better idea 
> of what
> cf storage performance you can get with c3000 hardwire.
> Benchmark results (2.6.19 kernel, dd if=/dev/hda of=/dev/null):

> 1) unmodified kernel: ~ 2MB/sec
> 2) optimized timings, 250ns io cycle: ~ 3MB/sec

Well, I tried your patch from the list on 2.6.26-RP.
I see 2.33 MB/sec -> 2.63MB/sec improvement on 6 years old 40x card.

> 3) optimized timings, DMA patch, 250ns io cycle: ~ 4MB/sec
> 4) optimized timings, DMA patch, 120ns io cycle: ~ 5.5MB/sec
> 5) optimized timings, DMA patch, 120ns io cycle, different cf card: ~ 
> 6.3MB/sec

> 120ns io cycle = CFA advanced I/O timing mode supported by the card.
> DMA patch = ide-cs patch, which adds support for memory-to-memory style DMA to
> transfer data from IDE data register to memory buffer.

Do you have a patch for these things?

Well, I guess that also SD runs slower than it could. PXA270
datasheet[1] says, that it can run 9.75MB/sec on SD. I see 1.8MB/s.

    page 15-1


Stanislav Brabec

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