CAAM performance on LTIB 3.0.35 kernel

terateller — Sun, 09 Feb 2014 10:28:18 GMT

Dear All,

I have the freescale iMX6 Sabre SD Quadcore board. I downloaded and compiled the 3.0.35 kernel using the LTIB(generated the uImage and uboot) with Ubuntu as the Rootfs.

I then made sure all the CAAM related flags are set in my kernel config. Additionally I set the following 3 flags to support AF_ALG for using the CAAM from openssl.

CONFIG_CRYPTO_USER_API=m

CONFIG_CRYPTO_USER_API_HASH=m

CONFIG_CRYPTO_USER_API_SKCIPHER=m

After booting, I downloaded the AF_ALG sources and built the libaf_alg.so and copied it to the "engines" folder on my openssl directory(openssl was already there in the Rootfs by default).

I then tested with & without engine af_alg and I get the same cpu cycles for both.

So now I am puzzled whether my CAAM is being used at all by the af_alg.

QUESTION 1: How can I check if my CAAM is being called by the af_alg?

I had set "caam" in my bootargs. If I type /proc/crypto part of the output i see is:

name	*: sha1*
*driver*	*: sha1-caam*
*module*	*: kernel*
*priority*	*: 3000*
*refcnt*	*: 1*
*selftest*	*: passed*
*type*	*: ahash*
*async*	*: yes*
*blocksize*	*: 64*

digestsize : 20

*name*	*: ecb(aes)*
*driver*	*: ecb-aes-caam*
*module*	*: kernel*
*priority*	*: 3000*
*refcnt*	*: 1*
*selftest*	*: passed*
*type*	*: ablkcipher*
*async*	*: yes*
*blocksize*	*: 16*

min keysize : 16

max keysize : 32

*ivsize*	*: 16*
*geniv*	*: eseqiv*

*name*	*: cbc(aes)*
*driver*	*: cbc-aes-caam*
*module*	*: kernel*
*priority*	*: 3000*
*refcnt*	*: 1*
*selftest*	*: passed*
*type*	*: ablkcipher*
*async*	*: yes*
*blocksize*	*: 16*

min keysize : 16

max keysize : 32

*ivsize*	*: 16*
*geniv*	: eseqiv

Speed test:

openssl speed -evp aes-128-cbc

Doing aes-128-cbc for 3s on 16 size blocks: 3004381 aes-128-cbc's in 3.00s

Doing aes-128-cbc for 3s on 64 size blocks: 849813 aes-128-cbc's in 3.00s

Doing aes-128-cbc for 3s on 256 size blocks: 220358 aes-128-cbc's in 3.00s

Doing aes-128-cbc for 3s on 1024 size blocks: 55605 aes-128-cbc's in 3.00s

Doing aes-128-cbc for 3s on 8192 size blocks: 6969 aes-128-cbc's in 3.00s

OpenSSL 1.0.0e 6 Sep 2011

built on: Tue Feb 19 00:08:00 UTC 2013

options:bn(64,32) rc4(ptr,char) des(idx,cisc,16,long) aes(partial) blowfish(ptr)

compiler: cc -fPIC -DOPENSSL_PIC -DZLIB -DOPENSSL_THREADS -D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H -DL_ENDIAN -DTERMIO -O2 -Wa,--noexecstack -g -Wall

The 'numbers' are in 1000s of bytes per second processed.

type 16 bytes 64 bytes 256 bytes 1024 bytes 8192 bytes

aes-128-cbc 16023.37k 18129.34k 18803.88k 18979.84k 19030.02k

With af_alg:

openssl speed -evp aes-128-cbc -e

engine "af_alg" set.

Doing aes-128-cbc for 3s on 16 size blocks: 2998763 aes-128-cbc's in 3.00s

Doing aes-128-cbc for 3s on 64 size blocks: 849813 aes-128-cbc's in 3.00s

Doing aes-128-cbc for 3s on 256 size blocks: 220357 aes-128-cbc's in 3.00s

Doing aes-128-cbc for 3s on 1024 size blocks: 55605 aes-128-cbc's in 3.00s

Doing aes-128-cbc for 3s on 8192 size blocks: 6970 aes-128-cbc's in 3.00s

OpenSSL 1.0.0e 6 Sep 2011

built on: Tue Feb 19 00:08:00 UTC 2013

options:bn(64,32) rc4(ptr,char) des(idx,cisc,16,long) aes(partial) blowfish(ptr)

compiler: cc -fPIC -DOPENSSL_PIC -DZLIB -DOPENSSL_THREADS -D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H -DL_ENDIAN -DTERMIO -O2 -Wa,--noexecstack -g -Wall

The 'numbers' are in 1000s of bytes per second processed.

type 16 bytes 64 bytes 256 bytes 1024 bytes 8192 bytes

aes-128-cbc 15993.40k 18129.34k 18803.80k 18979.84k 19032.75k

QUESTION 2: Are there some "CAAM commands" or test program at the kernel level to run JUST CAAM and test?

Thanks in advance.

Tera

Re: CAAM performance on LTIB 3.0.35 kernel

Yuri — Thu, 13 Feb 2014 05:16:14 GMT

Please refer to

Testing imx6 CAAM module in kernel

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