[vlc-devel] Performance Improvements of libdvbcsa keysetup

[Erik Tews]

Hi

I have written two patches for libdvbcsa:

speed2-test.patch - adds two new benchmarks to the testsuite to test the
speed of the keysetup for the bitsliced and the none-bitsliced variant:

for i in `seq 1 5`; do echo normal; ./benchks; echo bs; ./benchbitsliceks; done
normal
* DVBCSA keysetup benchmark *
 - 5000000 keys proceded, 1.1 Mkeys/s

bs
* DVBCSA keysetup benchmark *
 - 5000000 keys proceded, 1.2 Mkeys/s

normal
* DVBCSA keysetup benchmark *
 - 5000000 keys proceded, 1.1 Mkeys/s

bs
* DVBCSA keysetup benchmark *
 - 5000000 keys proceded, 1.2 Mkeys/s

normal
* DVBCSA keysetup benchmark *
 - 5000000 keys proceded, 1.1 Mkeys/s

bs
* DVBCSA keysetup benchmark *
 - 5000000 keys proceded, 1.2 Mkeys/s

normal
* DVBCSA keysetup benchmark *
 - 5000000 keys proceded, 1.0 Mkeys/s

bs
* DVBCSA keysetup benchmark *
 - 5000000 keys proceded, 1.2 Mkeys/s

normal
* DVBCSA keysetup benchmark *
 - 5000000 keys proceded, 1.1 Mkeys/s

bs
* DVBCSA keysetup benchmark *
 - 5000000 keys proceded, 1.2 Mkeys/s


speed2-programm.patch - improves the speed of the csa key setup of the
blockcipher. With the patch applied, I get:

for i in `seq 1 5`; do echo normal; ./benchks; echo bs; ./benchbitsliceks; done
normal
* DVBCSA keysetup benchmark *
 - 5000000 keys proceded, 5.6 Mkeys/s

bs
* DVBCSA keysetup benchmark *
 - 5000000 keys proceded, 2.0 Mkeys/s

normal
* DVBCSA keysetup benchmark *
 - 5000000 keys proceded, 5.7 Mkeys/s

bs
* DVBCSA keysetup benchmark *
 - 5000000 keys proceded, 1.9 Mkeys/s

normal
* DVBCSA keysetup benchmark *
 - 5000000 keys proceded, 5.7 Mkeys/s

bs
* DVBCSA keysetup benchmark *
 - 5000000 keys proceded, 2.0 Mkeys/s

normal
* DVBCSA keysetup benchmark *
 - 5000000 keys proceded, 5.7 Mkeys/s

bs
* DVBCSA keysetup benchmark *
 - 5000000 keys proceded, 2.0 Mkeys/s

normal
* DVBCSA keysetup benchmark *
 - 5000000 keys proceded, 5.6 Mkeys/s

bs
* DVBCSA keysetup benchmark *
 - 5000000 keys proceded, 2.0 Mkeys/s


Please review and apply if the patch is acceptable.
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