Antonio Del Cinque wrote:
> Thank you,
> I think your considerations are the right ones.
> 
> The DMA controller is not generating any interrupt, so I assume it is not
> actually working. I'm trying to verify that the jitter is caused by
> cache/TLB misses. I don't have much reference on how to lock the cache, so
> I'll just try to have the cache dirty in any other way to see if it causes
> the same jitter.

A good way to do this is to use the cache calibrator:
http://homepages.cwi.nl/~manegold/Calibrator/

-- 
                                                 Gilles.

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