netdev - Re: [PATCH 0/3] crypto: algif - change algif

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Date:	Mon, 02 Feb 2015 17:40:07 +0100
From:	Stephan Mueller <smueller@...onox.de>
To:	Tadeusz Struk <tadeusz.struk@...el.com>
Cc:	herbert@...dor.apana.org.au, linux-crypto@...r.kernel.org,
	netdev@...r.kernel.org, davem@...emloft.net, qat-linux@...el.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/3] crypto: algif - change algif_skcipher to be asynchronous

Am Montag, 2. Februar 2015, 07:03:02 schrieb Tadeusz Struk:

Hi Tadeusz,

>On 02/01/2015 10:31 AM, Stephan Mueller wrote:
>> Hi Tadeusz,
>> 
>>> > The way the algif_skcipher works currently is that on
>>> > sendmsg/sendpage it builds an sgl for the input data and then on
>>> > read/recvmsg it sends the job for encryption putting the user to
>>> > sleep till the data is processed. This way it can only handle one
>>> > job at a given time.
>>> > To be able to fuly utilize the potential of existing crypto
>>> > hardware
>>> > accelerators it is required to submit multiple jobs in
>>> > asynchronously.
>>> > First patch enables asynchronous read and write on socket.
>>> > Second patch enables af_alg sgl to be linked.
>>> > Third patch implement asynch read for skcipher.
>> 
>> Do you have a code fragment on how to test that patch? I would like
>> to see whether I can test that with my libkcapi.
>
>Hi Stephan,
>This is what I'm using.

Thanks for the listing.

Are you aware of the speed tester that I added to libkcapi? See [1] 
subdir speed-test/

If you want to play with it, all you need to do is to add your 
init/encryption/fini code into cryptoperf-skcipher.c.

The key is that cp_ablkcipher_enc_test/cp_ablkcipher_dec_test performs 
only the encryption/decryption operation (setkey, etc is done in the 
init call). The speed measuring is done only over that function.

[1] http://www.chronox.de/libkcapi.html

Ciao
Stephan
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