On 20 February 2015 at 15:55, Will Deacon <will.deacon@xxxxxxx> wrote: > On Thu, Feb 19, 2015 at 05:25:16PM +0000, Ard Biesheuvel wrote: >> 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 > > Fine by me. Shall I queue this via the arm64 tree? > Yes, please. >> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx> >> --- >> arch/arm64/crypto/Makefile | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> 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 >> -- >> 1.8.3.2 >> >> -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
