Re: [Ocf-linux-users] Benchmarking issues

[Turner, G. <gre...@ti...>]

Adam,
Have you also tried using "time -v" in front of your OpenSSL speed test command.

Something like:
# time -v openssl speed -elapsed -evp aes-128-cbc

Try it with and without acceleration.  It will report CPU usage and you can use this interpret how much CPU bandwidth you gain by offloading crypto to the accelerators.


Regards,
Greg Turner


-----Original Message-----
From: "Adam Cécile (Le_Vert)" [mailto:ga...@le...] 
Sent: Thursday, September 01, 2011 7:37 AM
To: ocf...@li...
Subject: Re: [Ocf-linux-users] Benchmarking issues

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 !

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