On 07/07/2010 04:28 AM, Joanna Rutkowska wrote:
> I know this is really off-topic, but I'm curious whether you have a Core
> i5/i7 processor with an AESNI instruction, and if you have, if you got
> the aesni-intel module to work properly with your kernel?
>
> I noticed that using LUKS with a very fast SSD, that normally could have
> a read throughput of around 200MB/s, significantly limits the
> performance down to around 80-100 MB/s, with the bottleneck being the
> kcryptd process easting 100% CPU (core).
>
No, this is a Core2 laptop. I don't do anything intensely IO bound on
it (mostly seek-bound stuff), so I wouldn't notice a kcryptd performance
regression too much. (Or, perhaps to be more accurate, when I switch to
ssd I also added encryption, so the ssd still seems like marvel of speed
compared to the hdd, even with the overhead.)
J
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