patch to improve AES-NI performance

[Mike Tancsa]

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.

	---Mike

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Mike Tancsa, tel +1 519 651 3400
Sentex Communications, mike at sentex.net
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