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Add parity generation/rebuild using AVX-512 for x86-64

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avx512f should work on all AVX512 hardware, since it only uses
Foundation instructions.

avx512bw should be faster on hardware supporting the AVW512BW
extension. We can use full-width pshufb (instead of relying on the 256
bits AVX2 pshufb). As a side-effect, the code is also unrolled more.

Reviewed-by: Richard Laager <rlaager@wiktel.com>
Reviewed-by: Gvozden Neskovic <neskovic@gmail.com>
Reviewed-by: Jinshan Xiong <jinshan.xiong@intel.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Romain Dolbeau <romain.github@dolbeau.name>
Closes #5219
This commit is contained in:
Romain Dolbeau
2016-11-02 20:40:23 +01:00
committed by Brian Behlendorf
parent 6d4210052b
commit 7f547f85fe
8 changed files with 971 additions and 0 deletions
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man/man5/zfs-module-parameters.5
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@@ -1775,6 +1775,8 @@ Possible options are:
sse2 - implementation using SSE2 instruction set (64bit x86 only)
ssse3 - implementation using SSSE3 instruction set (64bit x86 only)
avx2 - implementation using AVX2 instruction set (64bit x86 only)
avx512f - implementation using AVX512F instruction set (64bit x86 only)
avx512bw - implementation using AVX512F & AVX512BW instruction sets (64bit x86 only)
aarch64_neon - implementation using NEON (Aarch64/64 bit ARMv8 only)
aarch64_neonx2 - implementation using NEON with more unrolling (Aarch64/64 bit ARMv8 only)
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