patch to improve AES-NI performance

[John-Mark Gurney]

Mike Tancsa wrote this message on Fri, Aug 23, 2013 at 11:26 -0400:
> On 8/23/2013 11:16 AM, Ollivier Robert wrote:
> > According to John-Mark Gurney on Thu, Aug 22, 2013 at 01:20:27PM -0700:
> >> I have developed a patch to improve AES-NI performance.  If you took the
> >> AES-XTS algorithm into userland (no cryptodev or geli usage), these
> >> changes improve the performance over 10x in my tests (from ~150MB/sec to
> >> over 2GB/sec).  In tests of geli on gnop, the performance improvement is
> >> more moderate, around 4x due to overhead in other parts of the system.
> > 
> > Thanks a lot for this patch.  Now, looking at it in the stable/9 context, I can see that pjd did not merge (as he said at the time of commit) r226839 & r226839.  Is there any objection to merge these two (and possibly 247061 as well -- copyright update)?
> > 
> > I ask that for two reasons, these two revisions are speeding up AES-NI quite a bit and they are required for using jmg's patch.
> > 
> > I'll be testing all this in the next few days on my new AES-NI enabled machine.
> > 
> 
> Speeding up userland AES is very interesting to me for a couple of apps.
>  If there is a proper way I should test on RELENG_9, please let me know
> as I am few boxes that I would be happy to test/deploy on.

My patch would only effect userland applications that use /dev/crypto...

If they do their own AES-NI work, then there isn't any improvement...

-- 
  John-Mark Gurney				Voice: +1 415 225 5579

     "All that I will do, has been done, All that I have, has not."