VIA C7 support

[Matthieu Michaud]

Mike Tancsa a écrit :
> At 11:37 AM 10/12/2006, Oliver Fromme wrote:
>> Matthieu Michaud wrote:
>>  > I rent a small server based on a VIA C7 on which I installed a
>>  > 6.2-PRERELEASE as of today (see dmesg and kernconf attached). It runs
>>  > fairly well but I wonder if it couldn't be faster.
>>  >
>>  > According to padlock(4) man page, crypto hardware support is available
>>  > by adding padlock, crypto and cryptodev kernel options. I compiled 
>> it as
>>  > modules. I haven't noticed difference between 'openssl speed' and
>>  > 'openssl speed -engine padlock'. I attached results.
>>
>> I don't know if the openssl command really uses the padlock
>> engine.  I doubt it.
> 
> It will if you tell it to, but remember, its only AES that it will speed 
> up. You wont see a difference in things like 3des etc.
> 
> Just do the tests for aes
> 
> Try something like
> 
> openssl speed -evp aes-256-ecb -engine padlock
> vs
> openssl speed -evp aes-256-ecb -engine dynamic
> 
> On a CPU: VIA C3 Nehemiah+RNG+AES (796.77-MHz 686-class CPU)
> I get
> 
> type             16 bytes     64 bytes    256 bytes   1024 bytes   8192 
> bytes
> aes-256-ecb      37610.62k   142398.18k   389573.81k   678504.21k   
> 868056.96k
> aes-256-ecb       4923.20k     5143.88k     5222.51k     5256.46k     
> 5276.31k
> 
> For comparison, here is the same test on a Celeron 2.6 and an AMD 3800
> aes-256-ecb      39727.25k    41359.33k    42596.01k    42919.64k    
> 42940.31k
> aes-256-ecb      27408.65k    32035.54k    32623.81k    32767.08k    
> 32822.06k

ok, now i see a difference. on my C7 running a recent 6.2 :

aes-128-ecb 140283.57k 509427.16k 1340639.69k 2158707.04k 2626033.49k
aes-128-ecb 16956.08k 17668.87k 17894.31k 17951.39k 17967.98k

it might explain scp speedup.

thanx for pointing it to me :)