Commit 3ef91f21 authored Jun 02, 2013 by Jussi Kivilinna Committed by Herbert Xu Jun 05, 2013

crypto: twofish - disable AVX2 implementation



It appears that the performance of 'vpgatherdd' is suboptimal for this kind of
workload (tested on Core i5-4570) and causes twofish_avx2 to be significantly
slower than twofish_avx. So disable the AVX2 implementation to avoid
performance regressions.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

parent de614e56

crypto/Kconfig

+1 −0

Original line number	Diff line number	Diff line
		@@ -1299,6 +1299,7 @@ config CRYPTO_TWOFISH_AVX_X86_64
		config CRYPTO_TWOFISH_AVX2_X86_64
		tristate "Twofish cipher algorithm (x86_64/AVX2)"
		depends on X86 && 64BIT
		depends on BROKEN
		select CRYPTO_ALGAPI
		select CRYPTO_CRYPTD
		select CRYPTO_ABLK_HELPER_X86