Re: Looking for non-NIC hardware-offload for wpa2 decrypt.
From: Christian Lamparter <chunkeey@googlemail.com>
Date: 2014-08-22 22:55:38
Subsystem:
crypto api, the rest · Maintainers:
Herbert Xu, "David S. Miller", Linus Torvalds
On Wednesday, August 20, 2014 02:04:35 PM Ben Greear wrote:
On 08/20/2014 01:47 PM, Christian Lamparter wrote:quoted
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