[dm-crypt] dm-crypt multithreaded yet?
Brian J. Murrell
brian at interlinx.bc.ca
Wed Aug 8 16:29:01 CEST 2012
Sorry for what is probably a very tiresome topic here, but just trying
to find out what the current status is...
I thought I knew the answer to this question (dm-crypt multithreaded
yet? no) but I had read in several places that dm-crypt had gained
multithreaded capabilities. I'm still skeptical though. I certainly
don't see it on Fedora 17's 3.3.4-5.fc17.x86_64 kernel.
Sadly, I don't have an AES-NI capable CPU, but I do have 4 (real, 8 with
HT enabled) cores and dm-crypting on my SSD reduces its performance down
from about 260MB/s (native) to 95MB/s. :-( I would like to think I
could get more performance out of it if more of the (usually available
anyway) CPU could be thrown at it.
Is this something being worked on currently?
I have taken note of
but that work seems to be going back to Feb/2012. And TBH, I'm not
entirely clear if that work is aimed at multi-threaded dm-crypt or not.
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