GELI hardware performance.

[Nick Evans]

On Sun, 11 Sep 2005 08:56:26 +0800
"ke.han" <ke.han at redstarling.com> wrote:

> Thanks for the comparison.  As a newcomer to both GELI and gbde, it 
> would be niced to know how these numbers compare to no encryption on
> the same hardware.  How hard would it be to run these performance
> tests on the same hardware with no GELI? 
> It seems that for drives that put through  over 100Mbs that your
> results of around 14 to 27 Mbs (block output) are pretty low.  Am I
> readin the numbers wrong? comparing apples to oranges?
> any help in my understanding is appreciated as I'm trying to decide
> how to solve a new server setup.
> thanks, ke han
> 

No GELI, same disk:

Per char output: 45967 K/sec, 82.2% CPU
Block output: 56019 K/sec, 35.9% CPU
Rewrite: 15833 K/sec, 10.5% CPU

Per char input: 31412 K/sec, 60.8% CPU
Block input: 40143 K/sec, 17.5% CPU

Seeks/sec: 853.2, 5.2% CPU

Looks like ~50-85% of the original performance when hardware crypto is
used. Not bad considering.