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Subject[PATCH 0/2] crypto: arm64/crct10dif - refactor and implement non-Crypto Extension version
Date
The current arm64 CRC-T10DIF code only runs on cores that implement the
64x64 bit PMULL instructions that are part of the optional Crypto
Extensions, and falls back to the highly inefficient C code otherwise.

Let's provide a SIMD version that is twice as fast as the C code even on
a low end core like the Cortex-A53, and is time invariant and much easier
on the D-cache.

Some performance numbers at the bottom.

Ard Biesheuvel (2):
crypto: arm64/crct10dif - preparatory refactor for 8x8 PMULL version
crypto: arm64/crct10dif - implement non-Crypto Extensions alternative

arch/arm64/crypto/crct10dif-ce-core.S | 314 +++++++++++++++-----
arch/arm64/crypto/crct10dif-ce-glue.c | 14 +-
2 files changed, 251 insertions(+), 77 deletions(-)

--
2.18.0

tcrypto speed tests on a 1 GHz Cortex-A53:

C version
=========
0 ( 16 byte blocks, 16 bytes x 1): 3302652 opers/sec, 52842432 Bps
1 ( 64 byte blocks, 16 bytes x 4): 612125 opers/sec, 39176000 Bps
2 ( 64 byte blocks, 64 bytes x 1): 1272473 opers/sec, 81438272 Bps
3 ( 256 byte blocks, 16 bytes x 16): 162127 opers/sec, 41504512 Bps
4 ( 256 byte blocks, 64 bytes x 4): 280237 opers/sec, 71740672 Bps
5 ( 256 byte blocks, 256 bytes x 1): 367349 opers/sec, 94041344 Bps
6 ( 1024 byte blocks, 16 bytes x 64): 41142 opers/sec, 42129408 Bps
7 ( 1024 byte blocks, 256 bytes x 4): 88099 opers/sec, 90213376 Bps
8 ( 1024 byte blocks, 1024 bytes x 1): 95455 opers/sec, 97745920 Bps
9 ( 2048 byte blocks, 16 bytes x 128): 20622 opers/sec, 42233856 Bps
10 ( 2048 byte blocks, 256 bytes x 8): 44421 opers/sec, 90974208 Bps
11 ( 2048 byte blocks, 1024 bytes x 2): 47158 opers/sec, 96579584 Bps
12 ( 2048 byte blocks, 2048 bytes x 1): 48095 opers/sec, 98498560 Bps
13 ( 4096 byte blocks, 16 bytes x 256): 10318 opers/sec, 42262528 Bps
14 ( 4096 byte blocks, 256 bytes x 16): 22265 opers/sec, 91197440 Bps
15 ( 4096 byte blocks, 1024 bytes x 4): 23639 opers/sec, 96825344 Bps
16 ( 4096 byte blocks, 4096 bytes x 1): 24032 opers/sec, 98435072 Bps
17 ( 8192 byte blocks, 16 bytes x 512): 5167 opers/sec, 42328064 Bps
18 ( 8192 byte blocks, 256 bytes x 32): 11152 opers/sec, 91357184 Bps
19 ( 8192 byte blocks, 1024 bytes x 8): 11836 opers/sec, 96960512 Bps
20 ( 8192 byte blocks, 4096 bytes x 2): 12006 opers/sec, 98353152 Bps
21 ( 8192 byte blocks, 8192 bytes x 1): 12031 opers/sec, 98557952 Bps

PMULL 64x64 version
====================
0 ( 16 byte blocks, 16 bytes x 1): 1663221 opers/sec, 26611536 Bps
1 ( 64 byte blocks, 16 bytes x 4): 496141 opers/sec, 31753024 Bps
2 ( 64 byte blocks, 64 bytes x 1): 1553169 opers/sec, 99402816 Bps
3 ( 256 byte blocks, 16 bytes x 16): 132224 opers/sec, 33849344 Bps
4 ( 256 byte blocks, 64 bytes x 4): 458027 opers/sec, 117254912 Bps
5 ( 256 byte blocks, 256 bytes x 1): 1353682 opers/sec, 346542592 Bps
6 ( 1024 byte blocks, 16 bytes x 64): 33557 opers/sec, 34362368 Bps
7 ( 1024 byte blocks, 256 bytes x 4): 390226 opers/sec, 399591424 Bps
8 ( 1024 byte blocks, 1024 bytes x 1): 832879 opers/sec, 852868096 Bps
9 ( 2048 byte blocks, 16 bytes x 128): 16853 opers/sec, 34514944 Bps
10 ( 2048 byte blocks, 256 bytes x 8): 201626 opers/sec, 412930048 Bps
11 ( 2048 byte blocks, 1024 bytes x 2): 437117 opers/sec, 895215616 Bps
12 ( 2048 byte blocks, 2048 bytes x 1): 553689 opers/sec, 1133955072 Bps
13 ( 4096 byte blocks, 16 bytes x 256): 8438 opers/sec, 34562048 Bps
14 ( 4096 byte blocks, 256 bytes x 16): 102551 opers/sec, 420048896 Bps
15 ( 4096 byte blocks, 1024 bytes x 4): 226754 opers/sec, 928784384 Bps
16 ( 4096 byte blocks, 4096 bytes x 1): 323362 opers/sec, 1324490752 Bps
17 ( 8192 byte blocks, 16 bytes x 512): 4222 opers/sec, 34586624 Bps
18 ( 8192 byte blocks, 256 bytes x 32): 51709 opers/sec, 423600128 Bps
19 ( 8192 byte blocks, 1024 bytes x 8): 115508 opers/sec, 946241536 Bps
20 ( 8192 byte blocks, 4096 bytes x 2): 169015 opers/sec, 1384570880 Bps
21 ( 8192 byte blocks, 8192 bytes x 1): 168734 opers/sec, 1382268928 Bps

PMULL 8x8 version
=================
testing speed of async crct10dif (crct10dif-arm64-ce)
0 ( 16 byte blocks, 16 bytes x 1): 1281627 opers/sec, 20506032 Bps
1 ( 64 byte blocks, 16 bytes x 4): 351733 opers/sec, 22510912 Bps
2 ( 64 byte blocks, 64 bytes x 1): 959314 opers/sec, 61396096 Bps
3 ( 256 byte blocks, 16 bytes x 16): 91002 opers/sec, 23296512 Bps
4 ( 256 byte blocks, 64 bytes x 4): 256833 opers/sec, 65749248 Bps
5 ( 256 byte blocks, 256 bytes x 1): 490696 opers/sec, 125618176 Bps
6 ( 1024 byte blocks, 16 bytes x 64): 22952 opers/sec, 23502848 Bps
7 ( 1024 byte blocks, 256 bytes x 4): 127006 opers/sec, 130054144 Bps
8 ( 1024 byte blocks, 1024 bytes x 1): 168461 opers/sec, 172504064 Bps
9 ( 2048 byte blocks, 16 bytes x 128): 11496 opers/sec, 23543808 Bps
10 ( 2048 byte blocks, 256 bytes x 8): 64000 opers/sec, 131072000 Bps
11 ( 2048 byte blocks, 1024 bytes x 2): 84752 opers/sec, 173572096 Bps
12 ( 2048 byte blocks, 2048 bytes x 1): 89919 opers/sec, 184154112 Bps
13 ( 4096 byte blocks, 16 bytes x 256): 5757 opers/sec, 23580672 Bps
14 ( 4096 byte blocks, 256 bytes x 16): 32129 opers/sec, 131600384 Bps
15 ( 4096 byte blocks, 1024 bytes x 4): 42608 opers/sec, 174522368 Bps
16 ( 4096 byte blocks, 4096 bytes x 1): 46351 opers/sec, 189853696 Bps
17 ( 8192 byte blocks, 16 bytes x 512): 2884 opers/sec, 23625728 Bps
18 ( 8192 byte blocks, 256 bytes x 32): 16105 opers/sec, 131932160 Bps
19 ( 8192 byte blocks, 1024 bytes x 8): 21364 opers/sec, 175013888 Bps
20 ( 8192 byte blocks, 4096 bytes x 2): 23299 opers/sec, 190865408 Bps
21 ( 8192 byte blocks, 8192 bytes x 1): 23292 opers/sec, 190808064 Bps

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