From 3ef91f21a66826cf1003bb7b3c51ac2de4c28182 Mon Sep 17 00:00:00 2001 From: Jussi Kivilinna Date: Sun, 2 Jun 2013 19:51:47 +0300 Subject: 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 Signed-off-by: Herbert Xu --- crypto/Kconfig | 1 + 1 file changed, 1 insertion(+) (limited to 'crypto/Kconfig') diff --git a/crypto/Kconfig b/crypto/Kconfig index 622d8a48cbe..27720af741b 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -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 -- cgit v1.2.3-70-g09d2 From edb7c7cdba90c3fb2339e51c15d21982bdf72fdc Mon Sep 17 00:00:00 2001 From: Jussi Kivilinna Date: Sun, 2 Jun 2013 19:51:52 +0300 Subject: crypto: blowfish - disable AVX2 implementation It appears that the performance of 'vpgatherdd' is suboptimal for this kind of workload (tested on Core i5-4570) and causes blowfish-avx2 to be significantly slower than blowfish-amd64. So disable the AVX2 implementation to avoid performance regressions. Signed-off-by: Jussi Kivilinna Signed-off-by: Herbert Xu --- crypto/Kconfig | 1 + 1 file changed, 1 insertion(+) (limited to 'crypto/Kconfig') diff --git a/crypto/Kconfig b/crypto/Kconfig index 27720af741b..bf8148e74e7 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -823,6 +823,7 @@ config CRYPTO_BLOWFISH_X86_64 config CRYPTO_BLOWFISH_AVX2_X86_64 tristate "Blowfish cipher algorithm (x86_64/AVX2)" depends on X86 && 64BIT + depends on BROKEN select CRYPTO_ALGAPI select CRYPTO_CRYPTD select CRYPTO_ABLK_HELPER_X86 -- cgit v1.2.3-70-g09d2