From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Joanna Rutkowska <joanna@invisiblethingslab.com>
Cc: xen-devel@lists.xensource.com
Subject: Re: AES Encryption information
Date: Wed, 07 Jul 2010 09:42:33 -0700 [thread overview]
Message-ID: <4C34AE79.4010108@goop.org> (raw)
In-Reply-To: <4C3464EF.9080105@invisiblethingslab.com>
On 07/07/2010 04:28 AM, Joanna Rutkowska wrote:
> I know this is really off-topic, but I'm curious whether you have a Core
> i5/i7 processor with an AESNI instruction, and if you have, if you got
> the aesni-intel module to work properly with your kernel?
>
> I noticed that using LUKS with a very fast SSD, that normally could have
> a read throughput of around 200MB/s, significantly limits the
> performance down to around 80-100 MB/s, with the bottleneck being the
> kcryptd process easting 100% CPU (core).
>
No, this is a Core2 laptop. I don't do anything intensely IO bound on
it (mostly seek-bound stuff), so I wouldn't notice a kcryptd performance
regression too much. (Or, perhaps to be more accurate, when I switch to
ssd I also added encryption, so the ssd still seems like marvel of speed
compared to the hdd, even with the overhead.)
J
prev parent reply other threads:[~2010-07-07 16:42 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-06 18:13 AES Encryption information ReehanAhmedKhan I L
2010-07-06 18:52 ` Jeremy Fitzhardinge
2010-07-07 11:28 ` Joanna Rutkowska
2010-07-07 16:42 ` Jeremy Fitzhardinge [this message]
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