Subject: Re: AMD Geode LX Security Block (was Re: NetBSD on the Soekris net5501 status report)
To: Pawel Jakub Dawidek <pjd@FreeBSD.org>
From: Jared D. McNeill <jmcneill@invisible.ca>
List: tech-crypto
Date: 06/18/2007 08:56:01
On 18-Jun-07, at 8:16 AM, Pawel Jakub Dawidek wrote:
> I'd suggest correctness verification. ~15GB/s seems to be waaaay
> too fast:)
You're right, the results vary greatly from run to run. I've seen
numbers considerably lower than this as well as numbers considerably
higher. Not exactly sure why, maybe openssl has the timing wrong --
it claims that it's running for 3s on n size blocks, but then later
claims that it only ran for a fraction of that period of time, ie:
Doing aes-128-cbc for 3s on 8192 size blocks: 9972 aes-128-cbc's in
0.01s
Here's the output of 5 consecutive runs:
aes-128-cbc 7910.46k 27949.40k 172712.00k 303252.79k
81788928.00k
aes-128-cbc 5860.90k 59808.17k 174173.10k 687004.57k
3189273.85k
aes-128-cbc 9714.20k 78802.54k 82097.52k 533151.53k
768714.49k
aes-128-cbc 5211.17k 38478.90k 90328.36k 432283.24k
5722589.03k
aes-128-cbc 7297.00k 65662.57k 144285.57k 581977.72k
8273306.06k
Cheers,
Jared