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

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

[Gayatri Kammela]

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.

Gayatri Kammela (4):
  lib/raid6: Add AVX512 optimized gen_syndrome functions
  lib/raid6: Add AVX512 optimized recovery functions
  lib/raid6/test/Makefile: Add avx512 gen_syndrome and recovery
    functions
  (DO NOT APPLY) lib/raid6: Add unroll by 8 to AVX512 optimized 
    gen_syndrome functions

 arch/x86/Makefile        |   5 +-
 include/linux/raid/pq.h  |   5 +
 lib/raid6/Makefile       |   2 +-
 lib/raid6/algos.c        |  13 ++
 lib/raid6/avx512.c       | 466 +++++++++++++++++++++++++++++++++++++++++++++++
 lib/raid6/recov_avx512.c | 335 ++++++++++++++++++++++++++++++++++
 lib/raid6/test/Makefile  |   5 +-
 lib/raid6/x86.h          |  10 +
 8 files changed, 837 insertions(+), 4 deletions(-)
 create mode 100644 lib/raid6/avx512.c
 create mode 100644 lib/raid6/recov_avx512.c

-- 
1.9.1

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

[Markus Stockhausen]

[-- Attachment #1: Type: text/plain, Size: 1585 bytes --]

> Von: linux-raid-owner@vger.kernel.org [linux-raid-owner@vger.kernel.org]" im Auftrag von "Gayatri Kammela [gayatri.kammela@intel.com]
> Gesendet: Mittwoch, 3. August 2016 01:28
> An: linux-raid@vger.kernel.org
> Cc: shli@kernel.org; linux-kernel@vger.kernel.org; hpa@zytor.com; james.t.kukunas@linux.intel.com; fenghua.yu@intel.com; megha.dey@linux.intel.com; ravi.v.shankar@intel.com; 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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Re: [PATCH 0/4] Add AVX512 optimized gen_syndrome and recovery functions

[Shaohua Li]

On Tue, Aug 02, 2016 at 09:08:39PM +0000, Kammela, Gayatri wrote:
> Hi shaohua,
> I am wondering if there are any comments on this patch series ?

I didn't see the patches in my mailbox. please resend.

> Thanks,
> Gayatri Kammela
> 
> -----Original Message-----
> From: Kammela, Gayatri 
> Sent: Friday, July 8, 2016 12:16 PM
> To: linux-raid@vger.kernel.org
> Cc: shli@kernel.org; linux-kernel@vger.kernel.org; Kammela, Gayatri <gayatri.kammela@intel.com>
> Subject: [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.
> 
> Gayatri Kammela (4):
>   lib/raid6: Add AVX512 optimized gen_syndrome functions
>   lib/raid6: Add AVX512 optimized recovery functions
>   lib/raid6/test/Makefile: Add avx512 gen_syndrome and recovery
>     functions
>   lib/raid6: Add unroll by 8 to AVX512 optimized gen_syndrome functions
> 
>  arch/x86/Makefile        |   5 +-
>  include/linux/raid/pq.h  |   5 +
>  lib/raid6/Makefile       |   2 +-
>  lib/raid6/algos.c        |  13 ++
>  lib/raid6/avx512.c       | 466 +++++++++++++++++++++++++++++++++++++++++++++++
>  lib/raid6/recov_avx512.c | 335 ++++++++++++++++++++++++++++++++++
>  lib/raid6/test/Makefile  |   5 +-
>  lib/raid6/x86.h          |  10 +
>  8 files changed, 837 insertions(+), 4 deletions(-)  create mode 100644 lib/raid6/avx512.c  create mode 100644 lib/raid6/recov_avx512.c
> 
> --
> 1.9.1
> 

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

[Kammela, Gayatri]

Hi shaohua,
I am wondering if there are any comments on this patch series ?

Thanks,
Gayatri Kammela

-----Original Message-----
From: Kammela, Gayatri 
Sent: Friday, July 8, 2016 12:16 PM
To: linux-raid@vger.kernel.org
Cc: shli@kernel.org; linux-kernel@vger.kernel.org; Kammela, Gayatri <gayatri.kammela@intel.com>
Subject: [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.

Gayatri Kammela (4):
  lib/raid6: Add AVX512 optimized gen_syndrome functions
  lib/raid6: Add AVX512 optimized recovery functions
  lib/raid6/test/Makefile: Add avx512 gen_syndrome and recovery
    functions
  lib/raid6: Add unroll by 8 to AVX512 optimized gen_syndrome functions

 arch/x86/Makefile        |   5 +-
 include/linux/raid/pq.h  |   5 +
 lib/raid6/Makefile       |   2 +-
 lib/raid6/algos.c        |  13 ++
 lib/raid6/avx512.c       | 466 +++++++++++++++++++++++++++++++++++++++++++++++
 lib/raid6/recov_avx512.c | 335 ++++++++++++++++++++++++++++++++++
 lib/raid6/test/Makefile  |   5 +-
 lib/raid6/x86.h          |  10 +
 8 files changed, 837 insertions(+), 4 deletions(-)  create mode 100644 lib/raid6/avx512.c  create mode 100644 lib/raid6/recov_avx512.c

--
1.9.1