Greetings, again.
I went ahead and subscribed to the list, so you can ignore the "cc"
request in my previous mail. :)
I have some questions about the performance I'm seeing on my platform
(a 266MHz MPC8315E):
AES-128-CBC -- using cryptodev + evp gives 5x performance (with larger
block sizes), so that's a great win, and that's exactly what I wanted
to see.
SHA1 -- about 2.5x slower using cryptodev than native CPU
instructions. Is that expected?
RSA -- signing seems to be exactly the same, while verifying is about
10% faster in native. That seems odd, since cryptodev advertises RSA
capabilities, and the SEC v3.3 engine of the MPC8315E supports RSA
operations.
Finally, why does specifying the EVP result in such a huge difference?
E.g, with aes-128-cbc and 8KiB blocks:
no cryptodev, no evp -- 6MiB/s
no cryptodev, with evp -- 6MiB/s
with cryptodev, no evp -- 6MiB/s
with cryptodev, with evp -- 33MiB/s (!)
Apologies if these questions are simple. I've tried going through the
OpenSSL code, but it's... painful.
Again, thanks in advance if you have the time to reply.
Best regards,
Anthony Foiani
--------------------------------------------------------------------------
All times below are with "-elapsed" and "-evp" where applicable.
=== With cryptodev module loaded: ===
/ # openssl engine cryptodev -t -c
(cryptodev) BSD cryptodev engine
[RSA, DSA, DH, DES-CBC, DES-EDE3-CBC, AES-128-CBC, AES-192-CBC,
AES-256-CBC, BF-CBC, hmacWithMD5, hmacWithSHA1, MD5, SHA1]
[ available ]
/ # openssl speed -engine cryptodev -elapsed -evp AES-128-CBC
engine "cryptodev" set.
type 16 bytes 64 bytes 256 bytes 1024 bytes 8192 bytes
aes-128-cbc 136.56k 539.35k 2106.79k 7275.52k 33822.04k
/ # openssl speed -engine cryptodev -elapsed -evp SHA1
engine "cryptodev" set.
type 16 bytes 64 bytes 256 bytes 1024 bytes 8192 bytes
sha1 41.40k 165.01k 535.72k 2068.48k 13475.84k
/ # openssl speed -engine cryptodev -elapsed rsa2048
engine "cryptodev" set.
sign verify sign/s verify/s
rsa 2048 bits 0.166230s 0.005128s 6.0 195.0
=== Without cryptodev loaded: ===
/ # openssl speed -elapsed -evp AES-128-CBC
type 16 bytes 64 bytes 256 bytes 1024 bytes 8192 bytes
aes-128-cbc 4895.94k 5716.93k 6005.42k 6028.97k 6023.85k
/ # openssl speed -elapsed -evp SHA1
type 16 bytes 64 bytes 256 bytes 1024 bytes 8192 bytes
sha1 798.14k 3209.90k 9863.34k 20525.06k 30086.49k
/ # openssl speed -elapsed rsa2048
sign verify sign/s verify/s
rsa 2048 bits 0.165574s 0.004564s 6.0 219.1
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