crypto: twofish - add 3-way parallel x86_64 assembler implemention
Patch adds 3-way parallel x86_64 assembly implementation of twofish as new
module. New assembler functions crypt data in three blocks chunks, improving
cipher performance on out-of-order CPUs.
Patch has been tested with tcrypt and automated filesystem tests.
Summary of the tcrypt benchmarks:
Twofish 3-way-asm vs twofish asm (128bit 8kb block ECB)
encrypt: 1.3x speed
decrypt: 1.3x speed
Twofish 3-way-asm vs twofish asm (128bit 8kb block CBC)
encrypt: 1.07x speed
decrypt: 1.4x speed
Twofish 3-way-asm vs twofish asm (128bit 8kb block CTR)
encrypt: 1.4x speed
Twofish 3-way-asm vs AES asm (128bit 8kb block ECB)
encrypt: 1.0x speed
decrypt: 1.0x speed
Twofish 3-way-asm vs AES asm (128bit 8kb block CBC)
encrypt: 0.84x speed
decrypt: 1.09x speed
Twofish 3-way-asm vs AES asm (128bit 8kb block CTR)
encrypt: 1.15x speed
Full output:
http://koti.mbnet.fi/axh/kernel/crypto/tcrypt-speed-twofish-3way-asm-x86_64.txt
http://koti.mbnet.fi/axh/kernel/crypto/tcrypt-speed-twofish-asm-x86_64.txt
http://koti.mbnet.fi/axh/kernel/crypto/tcrypt-speed-aes-asm-x86_64.txt
Tests were run on:
vendor_id : AuthenticAMD
cpu family : 16
model : 10
model name : AMD Phenom(tm) II X6 1055T Processor
Also userspace test were run on:
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Xeon(R) CPU E7330 @ 2.40GHz
stepping : 11
Userspace test results:
Encryption/decryption of twofish 3-way vs x86_64-asm on AMD Phenom II:
encrypt: 1.27x
decrypt: 1.25x
Encryption/decryption of twofish 3-way vs x86_64-asm on Intel Xeon E7330:
encrypt: 1.36x
decrypt: 1.36x
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/Kconfig b/crypto/Kconfig
index 0763774..404a846 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -828,6 +828,26 @@
See also:
<http://www.schneier.com/twofish.html>
+config CRYPTO_TWOFISH_X86_64_3WAY
+ tristate "Twofish cipher algorithm (x86_64, 3-way parallel)"
+ depends on (X86 || UML_X86) && 64BIT
+ select CRYPTO_ALGAPI
+ select CRYPTO_TWOFISH_COMMON
+ select CRYPTO_TWOFISH_X86_64
+ help
+ Twofish cipher algorithm (x86_64, 3-way parallel).
+
+ Twofish was submitted as an AES (Advanced Encryption Standard)
+ candidate cipher by researchers at CounterPane Systems. It is a
+ 16 round block cipher supporting key sizes of 128, 192, and 256
+ bits.
+
+ This module provides Twofish cipher algorithm that processes three
+ blocks parallel, utilizing resources of out-of-order CPUs better.
+
+ See also:
+ <http://www.schneier.com/twofish.html>
+
comment "Compression"
config CRYPTO_DEFLATE