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authorArd Biesheuvel <ard.biesheuvel@linaro.org>2015-02-19 20:25:16 +0300
committerCatalin Marinas <catalin.marinas@arm.com>2015-02-26 21:31:46 +0300
commit0eee0fbd41c7b57d01136df2519c92ec1506e333 (patch)
tree8b1c7d0f1b1bcdb805d8995556e00b7e59de57b9 /arch/arm64/crypto
parent6910fa16dbe142f6a0fd0fd7c249f9883ff7fc8a (diff)
downloadlinux-0eee0fbd41c7b57d01136df2519c92ec1506e333.tar.xz
arm64: crypto: increase AES interleave to 4x
This patch increases the interleave factor for parallel AES modes to 4x. This improves performance on Cortex-A57 by ~35%. This is due to the 3-cycle latency of AES instructions on the A57's relatively deep pipeline (compared to Cortex-A53 where the AES instruction latency is only 2 cycles). At the same time, disable inline expansion of the core AES functions, as the performance benefit of this feature is negligible. Measured on AMD Seattle (using tcrypt.ko mode=500 sec=1): Baseline (2x interleave, inline expansion) ------------------------------------------ testing speed of async cbc(aes) (cbc-aes-ce) decryption test 4 (128 bit key, 8192 byte blocks): 95545 operations in 1 seconds test 14 (256 bit key, 8192 byte blocks): 68496 operations in 1 seconds This patch (4x interleave, no inline expansion) ----------------------------------------------- testing speed of async cbc(aes) (cbc-aes-ce) decryption test 4 (128 bit key, 8192 byte blocks): 124735 operations in 1 seconds test 14 (256 bit key, 8192 byte blocks): 92328 operations in 1 seconds Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/crypto')
-rw-r--r--arch/arm64/crypto/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/crypto/Makefile b/arch/arm64/crypto/Makefile
index 5720608c50b1..abb79b3cfcfe 100644
--- a/arch/arm64/crypto/Makefile
+++ b/arch/arm64/crypto/Makefile
@@ -29,7 +29,7 @@ aes-ce-blk-y := aes-glue-ce.o aes-ce.o
obj-$(CONFIG_CRYPTO_AES_ARM64_NEON_BLK) += aes-neon-blk.o
aes-neon-blk-y := aes-glue-neon.o aes-neon.o
-AFLAGS_aes-ce.o := -DINTERLEAVE=2 -DINTERLEAVE_INLINE
+AFLAGS_aes-ce.o := -DINTERLEAVE=4
AFLAGS_aes-neon.o := -DINTERLEAVE=4
CFLAGS_aes-glue-ce.o := -DUSE_V8_CRYPTO_EXTENSIONS