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Groups > linux.kernel > #1455534 > unrolled thread
| Started by | Gayatri Kammela <gayatri.kammela@intel.com> |
|---|---|
| First post | 2016-08-03 01:40 +0200 |
| Last post | 2016-08-03 08:10 +0200 |
| Articles | 2 — 2 participants |
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[PATCH 0/4] Add AVX512 optimized gen_syndrome and recovery functions Gayatri Kammela <gayatri.kammela@intel.com> - 2016-08-03 01:40 +0200
AW: [PATCH 0/4] Add AVX512 optimized gen_syndrome and recovery functions Markus Stockhausen <stockhausen@collogia.de> - 2016-08-03 08:10 +0200
| From | Gayatri Kammela <gayatri.kammela@intel.com> |
|---|---|
| Date | 2016-08-03 01:40 +0200 |
| Subject | [PATCH 0/4] Add AVX512 optimized gen_syndrome and recovery functions |
| Message-ID | <s1RrX-2SO-5@gated-at.bofh.it> |
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
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| From | Markus Stockhausen <stockhausen@collogia.de> |
|---|---|
| Date | 2016-08-03 08:10 +0200 |
| Subject | AW: [PATCH 0/4] Add AVX512 optimized gen_syndrome and recovery functions |
| Message-ID | <s1Xxo-6Z4-5@gated-at.bofh.it> |
| In reply to | #1455534 |
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> 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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