[dm-crypt] Any practical AES-NI benchmarks around?

Rick Moritz rahvin at gmail.com
Sat Jan 23 01:54:33 CET 2010

Those Sandra results sure look promising, I wonder why no "real world" benchmark mirrors the extreme performance gain of the raw encryption power - one would expect gains that reflect the order of magnitude higher bandwidth.
For me, the killer is still cost. In the enterprise the new 1156 Xeon's will probably make great sense, but putting down 200 euro/dollar for a dual core doesn't seem viable at the moment. Maybe my server upgrade, will have to wait for sandy bridge after all. (Also, there are no H5x based mainboards with sufficient SATA ports for my needs, which also is hindering my acceptance of the platform)

On Sat, 23 Jan 2010 00:56:28 +0100 Zdenek Kaspar <zkaspar82 at gmail.com> wrote:

> Dne 23.1.2010 0:27, Rick Moritz napsal(a):
> > Hi,
> > 
> > I saw some rough data in the clarkdale review at anandtech, their AES benchmark algorithm saw an increase in performance of a few percent (http://www.anandtech.com/cpuchipsets/showdoc.aspx?i=3704&p=5). Not as much as I was hoping for. Additionally, the feature is not available on the i3 series cpu's, another setback, as I was hoping on getting decent AES performance on the cheap..
> > If anyone finds a more relevant benchmark, I'd also like to see it. At the moment I don't even know if we have a kernel module that does AES-N1 yet.
> > 
> > 
> > On Sat, 23 Jan 2010 00:16:59 +0100 Zdenek Kaspar <zkaspar82 at gmail.com> wrote:
> > 
> >> Hello, does anyone have AES-NI capable CPU and is able to share some
> >> dm-crypt numbers ?
> >>
> >> TIA, Z.
> Hi Rick, I quickly saw this one (promising):
> http://www.tomshardware.com/reviews/intel-clarkdale-core-i5-661,2514-3.html
> And there are patches for openssl integration which makes me think it
> will be useful in future. It got merged (aesni-intel) in .30 and
> extended in .31 kernel.
> Yeah, the price for dualcore CPU is not interesting atm unless it can
> cure dm-crypt SMP scaling issue..
> Z.

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