Strange NOR read/write throughput behaviour

[Jared Hulbert]

On 11/15/05, Bernhard Priewasser <priewasser at gmail.com> wrote:
> Hi all,
>
> can anybody help me explaining this diagram of NOR read throughput?
>
>         http://files.lamark.de/nor_read.png
>
> As soon as a file, read from a StrataFlash containing only this file,
> exceeds erase block size (128KiB), file reading lasts a portion of time
> longer and read throughput stagnates...
>
> Write throughput seems to be constant around erase block size:
>
>         http://files.lamark.de/nor_write.png
>
> Best regards,
> Bernhard
>
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Could you please explain the experiment a little more?

How are you measuring read and write throughput?

Which StrataFlash are you using?  What board are you connecting the
flash to?  What kernel and MTD are you using?