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SubjectKernel crypto API: cryptoperf performance measurement
Date
Hi,

during playing around with the kernel crypto API, I implemented a performance
measurement tool kit for the various kernel crypto API cipher types. The
cryptoperf tool kit is provided in [1].

Comments are welcome.

In general, the results are as expected, i.e. the assembler implementations
are faster than the pure C implementations. However, there are curious results
which probably should be checked by the maintainers of the respective ciphers
(hoping that my tool works correctly ;-) ):

ablkcipher
----------

- cryptd is slower by factor 10 across the board

blkcipher
---------

- Blowfish x86_64 assembler together with the generic C block chaining modes
is significantly slower than Blowfish implemented in generic C

- Blowfish x86_64 assembler in ECB is significantly slower than generic C
Blowfish ECB

- Serpent assembler implementations are not significantly faster than generic
C implementations

- AES-NI ECB, LRW, CTR is significantly slower than AES i586 assembler.

- AES-NI ECB, LRW, CTR is not significantly faster than AES generic C

rng
---

- The ANSI X9.31 RNG seems to work massively faster than the underlying AES
cipher (by about a factor of 5). I am unsure about the cause of this.


Caveat
------

Please note that there is one small error which I am unsure how to fix it as
documented in the TODO file.

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

--
Ciao
Stephan


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