AW: [PATCH 0/4] Add AVX512 optimized gen_syndrome and recovery functions

[Markus Stockhausen]

> Von: linux-raid-owner@xxxxxxxxxxxxxxx [linux-raid-owner@xxxxxxxxxxxxxxx]" im Auftrag von "Gayatri Kammela [gayatri.kammela@xxxxxxxxx]
> Gesendet: Mittwoch, 3. August 2016 01:28
> An: linux-raid@xxxxxxxxxxxxxxx
> Cc: shli@xxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; hpa@xxxxxxxxx; james.t.kukunas@xxxxxxxxxxxxxxx; fenghua.yu@xxxxxxxxx; megha.dey@xxxxxxxxxxxxxxx; ravi.v.shankar@xxxxxxxxx; Gayatri Kammela
> Betreff: [PATCH 0/4] Add AVX512 optimized gen_syndrome and recovery functions
> 
> This is the patch set for adding AVX512 optimized gen_syndrome
> and recovery functions.
> 
> Optimization of RAID6 using AVX512 instructions should improve the
> RAID6 performance.These patches are tested and observed the improvement
> in performance.

Hi Gayatri,

as you already implemented the gen_syndrome() functions it should be a piece
of cake to add the xor_syndrome() ones. Only if these are implemented we can
make use of Read-Modify-Write operations if the kernel chooses an processor 
optimized algorithm. They are already in the SSE2 path but are still missing from 
the current AVX2 implementation.

More infos here:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=fe5cbc6e06c7d8b3a86f6f5491d74766bb5c2827
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a582564b24bec0443b5c5ff43ee6d1258f8bd658
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0e833e697bcf4c2f3f7fb9fce39d08cd4439e5d7

It would give the final touch to the patches.

Best regards.

Markus

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