On Wednesday, August 20, 2014 02:04:35 PM Ben Greear wrote:
> On 08/20/2014 01:47 PM, Christian Lamparter wrote:
>
> > I'll look into the assembler implementation of aes-ccm. But I'm
> > afraid that this won't increase the throughput (and only decrease
> > the load on the CPU a bit).
>
> I think you are right, and probably it is not worth much effort at
> this point, at least as far as my setup is concerned.
"There's a test bench tool (tcrypt) to measure the performance
of any cipher. It would be interesting to know what the
performance/throughput it can produce without the overhead
of any application. ..."
here it is: the module is located in crpyto/tcrypt
module parameters:
- mode=212 (original ccm)
- mode=213 (ccm-aesni)
(sec=1 - Length in seconds of speed tests)
This will test the speed of the ccm implementation at
different block sizes for one second.
BTW: any luck with figuring out, if there are any other obvious
bottlenecks? (Other than: btserver, checksumming, ...)?
Regards
Christian
---
diff --git a/crypto/tcrypt.c b/crypto/tcrypt.c
index 890449e..7675a13 100644
--- a/crypto/tcrypt.c
+++ b/crypto/tcrypt.c
@@ -354,8 +354,10 @@ static void test_aead_speed(const char *algo, int enc, unsigned int secs,
ret = crypto_aead_setauthsize(tfm, authsize);
iv_len = crypto_aead_ivsize(tfm);
- if (iv_len)
- memset(&iv, 0xff, iv_len);
+ if (iv_len) {
+ for (j = 0; j < iv_len; j++)
+ iv[j] = j + 1;
+ }
crypto_aead_clear_flags(tfm, ~0);
printk(KERN_INFO "test %u (%d bit key, %d byte blocks): ",
@@ -1751,6 +1753,15 @@ static int do_test(int m)
NULL, 0, 16, 8, aead_speed_template_20);
break;
+ case 212:
+ test_aead_speed("ccm_base(ctr(aes-aesni),aes-aesni)", ENCRYPT, sec,
+ NULL, 0, 16, 8, aead_speed_template_16);
+ break;
+ case 213:
+ test_aead_speed("ccm-aes-aesni", ENCRYPT, sec,
+ NULL, 0, 16, 8, aead_speed_template_16);
+ break;
+
case 300:
/* fall through */
diff --git a/crypto/tcrypt.h b/crypto/tcrypt.h
index 6c7e21a..88f152d 100644
--- a/crypto/tcrypt.h
+++ b/crypto/tcrypt.h
@@ -66,6 +66,7 @@ static u8 speed_template_32_64[] = {32, 64, 0};
* AEAD speed tests
*/
static u8 aead_speed_template_20[] = {20, 0};
+static u8 aead_speed_template_16[] = {16, 0};
/*
* Digest speed tests
--
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