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linux/lib/raid6/Makefile

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md: Factor out RAID6 algorithms into lib/ We'll want to use these in btrfs too. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-07-13 11:35:12 +01:00
lib/raid6: build proper files on corresponding arch sse and avx2 stuff only exist on x86 arch, and we don't need to build altivec on x86. And we can do that at lib/raid6/Makefile. Proposed-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com> Reviewed-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Jim Kukunas <james.t.kukunas@linux.intel.com> Signed-off-by: NeilBrown <neilb@suse.de>
2012-11-30 13:10:40 -08:00
lib/raid6: add ARM-NEON accelerated syndrome calculation Rebased/reworked a patch contributed by Rob Herring that uses NEON intrinsics to perform the RAID-6 syndrome calculations. It uses the existing unroll.awk code to generate several unrolled versions of which the best performing one is selected at boot time. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Acked-by: Nicolas Pitre <nico@linaro.org> Cc: hpa@linux.intel.com
2013-05-16 17:20:32 +02:00
RAID: add tilegx SIMD implementation of raid6 This change adds TILE-Gx SIMD instructions to the software raid (md), modeling the Altivec implementation. This is only for Syndrome generation; there is more that could be done to improve recovery, as in the recent Intel SSE3 recovery implementation. The code unrolls 8 times; this turns out to be the best on tilegx hardware among the set 1, 2, 4, 8 or 16. The code reads one cache-line of data from each disk, stores P and Q then goes to the next cache-line. The test code in sys/linux/lib/raid6/test reports 2008 MB/s data read rate for syndrome generation using 18 disks (16 data and 2 parity). It was 1512 MB/s before this SIMD optimizations. This is running on 1 core with all the data in cache. This is based on the paper The Mathematics of RAID-6. (http://kernel.org/pub/linux/kernel/people/hpa/raid6.pdf). Signed-off-by: Ken Steele <ken@tilera.com> Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> Signed-off-by: NeilBrown <neilb@suse.de>
2013-08-07 12:39:56 -04:00
lib/raid6: build proper files on corresponding arch sse and avx2 stuff only exist on x86 arch, and we don't need to build altivec on x86. And we can do that at lib/raid6/Makefile. Proposed-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com> Reviewed-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Jim Kukunas <james.t.kukunas@linux.intel.com> Signed-off-by: NeilBrown <neilb@suse.de>
2012-11-30 13:10:40 -08:00
md: Factor out RAID6 algorithms into lib/ We'll want to use these in btrfs too. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-07-13 11:35:12 +01:00
Merge branch 'async' of macbook:git/btrfs-unstable Conflicts: drivers/md/Makefile lib/raid6/unroll.pl
2010-08-09 10:36:44 +01:00
md: Factor out RAID6 algorithms into lib/ We'll want to use these in btrfs too. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-07-13 11:35:12 +01:00
lib/raid6: add ARM-NEON accelerated syndrome calculation Rebased/reworked a patch contributed by Rob Herring that uses NEON intrinsics to perform the RAID-6 syndrome calculations. It uses the existing unroll.awk code to generate several unrolled versions of which the best performing one is selected at boot time. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Acked-by: Nicolas Pitre <nico@linaro.org> Cc: hpa@linux.intel.com
2013-05-16 17:20:32 +02:00
Rename raid6 files now they're in a 'raid6' directory. Linus asks 'why "raid6" twice?'. No reason. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-08-11 00:19:05 +01:00
md: Factor out RAID6 algorithms into lib/ We'll want to use these in btrfs too. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-07-13 11:35:12 +01:00
Rename raid6 files now they're in a 'raid6' directory. Linus asks 'why "raid6" twice?'. No reason. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-08-11 00:19:05 +01:00
md: Factor out RAID6 algorithms into lib/ We'll want to use these in btrfs too. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-07-13 11:35:12 +01:00
Rename raid6 files now they're in a 'raid6' directory. Linus asks 'why "raid6" twice?'. No reason. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-08-11 00:19:05 +01:00
md: Factor out RAID6 algorithms into lib/ We'll want to use these in btrfs too. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-07-13 11:35:12 +01:00
Rename raid6 files now they're in a 'raid6' directory. Linus asks 'why "raid6" twice?'. No reason. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-08-11 00:19:05 +01:00
md: Factor out RAID6 algorithms into lib/ We'll want to use these in btrfs too. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-07-13 11:35:12 +01:00
Rename raid6 files now they're in a 'raid6' directory. Linus asks 'why "raid6" twice?'. No reason. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-08-11 00:19:05 +01:00
md: Factor out RAID6 algorithms into lib/ We'll want to use these in btrfs too. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-07-13 11:35:12 +01:00
Rename raid6 files now they're in a 'raid6' directory. Linus asks 'why "raid6" twice?'. No reason. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-08-11 00:19:05 +01:00
md: Factor out RAID6 algorithms into lib/ We'll want to use these in btrfs too. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-07-13 11:35:12 +01:00
Rename raid6 files now they're in a 'raid6' directory. Linus asks 'why "raid6" twice?'. No reason. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-08-11 00:19:05 +01:00
md: Factor out RAID6 algorithms into lib/ We'll want to use these in btrfs too. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-07-13 11:35:12 +01:00
Rename raid6 files now they're in a 'raid6' directory. Linus asks 'why "raid6" twice?'. No reason. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-08-11 00:19:05 +01:00
md: Factor out RAID6 algorithms into lib/ We'll want to use these in btrfs too. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-07-13 11:35:12 +01:00
Rename raid6 files now they're in a 'raid6' directory. Linus asks 'why "raid6" twice?'. No reason. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-08-11 00:19:05 +01:00
md: Factor out RAID6 algorithms into lib/ We'll want to use these in btrfs too. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-07-13 11:35:12 +01:00
Rename raid6 files now they're in a 'raid6' directory. Linus asks 'why "raid6" twice?'. No reason. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-08-11 00:19:05 +01:00
md: Factor out RAID6 algorithms into lib/ We'll want to use these in btrfs too. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-07-13 11:35:12 +01:00
lib/raid6: add ARM-NEON accelerated syndrome calculation Rebased/reworked a patch contributed by Rob Herring that uses NEON intrinsics to perform the RAID-6 syndrome calculations. It uses the existing unroll.awk code to generate several unrolled versions of which the best performing one is selected at boot time. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Acked-by: Nicolas Pitre <nico@linaro.org> Cc: hpa@linux.intel.com
2013-05-16 17:20:32 +02:00
RAID: add tilegx SIMD implementation of raid6 This change adds TILE-Gx SIMD instructions to the software raid (md), modeling the Altivec implementation. This is only for Syndrome generation; there is more that could be done to improve recovery, as in the recent Intel SSE3 recovery implementation. The code unrolls 8 times; this turns out to be the best on tilegx hardware among the set 1, 2, 4, 8 or 16. The code reads one cache-line of data from each disk, stores P and Q then goes to the next cache-line. The test code in sys/linux/lib/raid6/test reports 2008 MB/s data read rate for syndrome generation using 18 disks (16 data and 2 parity). It was 1512 MB/s before this SIMD optimizations. This is running on 1 core with all the data in cache. This is based on the paper The Mathematics of RAID-6. (http://kernel.org/pub/linux/kernel/people/hpa/raid6.pdf). Signed-off-by: Ken Steele <ken@tilera.com> Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> Signed-off-by: NeilBrown <neilb@suse.de>
2013-08-07 12:39:56 -04:00
md: Factor out RAID6 algorithms into lib/ We'll want to use these in btrfs too. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-07-13 11:35:12 +01:00
Rename raid6 files now they're in a 'raid6' directory. Linus asks 'why "raid6" twice?'. No reason. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-08-11 00:19:05 +01:00
md: Factor out RAID6 algorithms into lib/ We'll want to use these in btrfs too. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-07-13 11:35:12 +01:00