[fedora-arm] Hardware Crypto Offload on Kirkwood (SheevaPlug)

Andrew Burgess aab at cichlid.com
Tue May 24 15:00:23 UTC 2011


On 05/23/2011 10:18:29 AM, Gordan Bobic wrote:

> > cryptodev probably used the CESA hardware.
> 
> It is - the mv_cesa kernel process starts to show up in top when the
> crypto engine is being used.
> 
> > since it isnt using cpu time
> > i guess its technically not a bug.
> 
> I never said it was a bug,

i didn't mean to imply that you had. the confusion was all mine.

> If I'm churning without cryptoddev, the CPU
> sits at 0% idle. With cryptodev and large blocks the idle CPU time is
> typically > 70%. So the remaining 70% of CPU could indeed be used for
> something else, such as additional crypto if needs be (see the  
> comments
> in the article linked earlier in this thread that point out this very
> possibility).

i missed the article reference. it would have saved me some googling :-)

here it is again for the similarly myopic:  
http://www.altechnative.net/?p=174


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