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| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2015-07-01 12:19:56 +1000 |
|---|---|---|
| committer | NeilBrown <neilb@suse.com> | 2015-08-31 19:29:05 +0200 |
| commit | 0e833e697bcf4c2f3f7fb9fce39d08cd4439e5d7 (patch) | |
| tree | c70db4a45ddd2f0e4458e8fcbf3ff5bdc09546ec /lib/raid6/neon.c | |
| parent | 199dc6ed5179251fa6158a461499c24bdd99c836 (diff) | |
| download | op-kernel-dev-0e833e697bcf4c2f3f7fb9fce39d08cd4439e5d7.zip op-kernel-dev-0e833e697bcf4c2f3f7fb9fce39d08cd4439e5d7.tar.gz | |
md/raid6: delta syndrome for ARM NEON
This implements XOR syndrome calculation using NEON intrinsics.
As before, the module can be built for ARM and arm64 from the
same source.
Relative performance on a Cortex-A57 based system:
raid6: int64x1 gen() 905 MB/s
raid6: int64x1 xor() 881 MB/s
raid6: int64x2 gen() 1343 MB/s
raid6: int64x2 xor() 1286 MB/s
raid6: int64x4 gen() 1896 MB/s
raid6: int64x4 xor() 1321 MB/s
raid6: int64x8 gen() 1773 MB/s
raid6: int64x8 xor() 1165 MB/s
raid6: neonx1 gen() 1834 MB/s
raid6: neonx1 xor() 1278 MB/s
raid6: neonx2 gen() 2528 MB/s
raid6: neonx2 xor() 1942 MB/s
raid6: neonx4 gen() 2888 MB/s
raid6: neonx4 xor() 2334 MB/s
raid6: neonx8 gen() 2957 MB/s
raid6: neonx8 xor() 2232 MB/s
raid6: using algorithm neonx8 gen() 2957 MB/s
raid6: .... xor() 2232 MB/s, rmw enabled
Cc: Markus Stockhausen <stockhausen@collogia.de>
Cc: Neil Brown <neilb@suse.de>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: NeilBrown <neilb@suse.com>
Diffstat (limited to 'lib/raid6/neon.c')
| -rw-r--r-- | lib/raid6/neon.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/lib/raid6/neon.c b/lib/raid6/neon.c index d9ad6ee..7076ef1 100644 --- a/lib/raid6/neon.c +++ b/lib/raid6/neon.c @@ -40,9 +40,20 @@ (unsigned long)bytes, ptrs); \ kernel_neon_end(); \ } \ + static void raid6_neon ## _n ## _xor_syndrome(int disks, \ + int start, int stop, \ + size_t bytes, void **ptrs) \ + { \ + void raid6_neon ## _n ## _xor_syndrome_real(int, \ + int, int, unsigned long, void**); \ + kernel_neon_begin(); \ + raid6_neon ## _n ## _xor_syndrome_real(disks, \ + start, stop, (unsigned long)bytes, ptrs); \ + kernel_neon_end(); \ + } \ struct raid6_calls const raid6_neonx ## _n = { \ raid6_neon ## _n ## _gen_syndrome, \ - NULL, /* XOR not yet implemented */ \ + raid6_neon ## _n ## _xor_syndrome, \ raid6_have_neon, \ "neonx" #_n, \ 0 \ |
