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Date: Sun, 24 May 2015 22:21:57 -0700
From: John-Mark Gurney <jmg@funkthat.com>
To: Kevin Day <toasty@dragondata.com>
Cc: freebsd-security@freebsd.org
Subject: Re: Atom C2758 - loading aesni(4) reduces performance
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Kevin Day wrote this message on Sun, May 24, 2015 at 23:15 -0500:
> > On May 24, 2015, at 5:44 PM, John-Mark Gurney <jmg@funkthat.com> wrote:
> > 
> > If you have cryptodev loaded, this is to be expected as OpenSSL will
> > use /dev/crypto instead of the AES-NI instructions..  Just don't load
> > cryptodev and you'll be fine..
> 
> So to make sure I???m understanding??? openssl has native AES-NI support, and it also can use /dev/crypto. It???s preferring /dev/crypto, but /dev/crypto has much higher overhead?

Correct...  At least OpenSSL 1.0.1 that started shipping w/ 10.0 has
native AES-NI support... Pre-10.0 doesn't have it...

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

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