Re: [Ocf-linux-users] Benchmarking issues

[Adam C. (Le_Vert) <ga...@le...>]

On 01/09/2011 13:54, David McCullough wrote:
> Jivin "Adam Cécile (Le_Vert)" lays it down ...
>> Hello OCF guys,
>>
>> I'm trying to enable ocf on a Geode LX cpu wich is known to handle
>> aes-128-cbc trhough geode-aes kernel module.
>> I rebuilt linux-3.0 with OCF kernel patch and then rebuilt openssl
>> debian's package with -DHAVE_CRYPTODEV -I$(CURDIR)/debian/includes (this
>> directory contains crypto/cryptodev.h)
>> Then I loaded ocf, cryptosoft and cryptodev kernel modules...
>>
>> Here is the result of my tests using different cipher:
>>
>> # With OpenSSL 1.0.0d cryptodev enabled package
>> # openssl speed -evp<cipher>
>> aes-128-cbc      16761.07k    58822.40k   240275.91k   547942.40k
>> 3126886.40k
>> bf-cbc           13351.73k    67366.40k   191564.80k   715946.67k
>> 1298432.00k
>> des-ede3-cbc     30708.80k    88375.47k   186675.20k
>> 415846.40k         infk
>>
>> #rmmod cryptodev
>> aes-128-cbc       3595.73k     3942.16k     4062.50k     8154.89k
>> 8244.06k
>> bf-cbc            8260.17k    10052.27k    10728.30k    10923.12k
>> 10929.06k
>> des-ede3-cbc      1961.65k     2046.67k     2071.55k     2076.43k
>> 2074.03k
>>
>> Results without cryptodev looks fine (slow 500Mhz CPU) but the ones with
>> cryptodev loaded doesn't make any sense !
>> There's no reason to have such faster blowfish and des results, as the
>> hardware chip only handles aes-128-cbc.
>> Could you please tell me what I'm doing wrong ???
> Add the "-elapsed" option to openssl speed to get real numbers.
> Otherwise it doesn't count kernel time IIRC,
>
> Cheers,
> Davidm
>
Thanks, it looks a lot better now.

# With cryptodev loaded:
# openssl speed -elapsed -evp aes-128-cbc
aes-128-cbc        507.31k     1964.05k     7202.05k    19972.10k    
41997.65k
bf-cbc             538.20k     1801.51k     4496.98k     7171.07k     
8672.60k
des-ede3-cbc       410.43k      883.29k     1236.37k     1385.47k     
1436.33k

# Without cryptodev loaded
aes-128-cbc       3580.90k     3929.60k     4037.89k     8096.77k     
8211.11k
bf-cbc            8249.83k    10068.86k    10702.76k    10904.58k    
10944.51k
des-ede3-cbc      1989.86k     2070.83k     2075.82k     2107.73k     
2106.51k

Is it normal than I have lower bandwitch with cryptodev when the size is 
lower than 256 bytes ?
Btw, cryptodev seems to be slower than regular openssl on non-hardware 
accelerated cipher. Anyway to enable cryptodev ONLY for aes-128-cbc ?

Regards, Adam !