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linux/lib/raid6
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Dirk Müller 36dacddbf0 lib/raid6: Use strict priority ranking for pq gen() benchmarking 
On x86_64, currently 3 variants of AVX512, 3 variants of AVX2
and 3 variants of SSE2 are benchmarked on initialization, taking
between 144-153 jiffies. Testing across a hardware pool of
various generations of intel cpus I could not find a single
case where SSE2 won over AVX2 or AVX512. There are cases where
AVX2 wins over AVX512 however.

Change "prefer" into an integer priority field (similar to
how recov selection works) to have more than one ranking level
available, which is backwards compatible with existing behavior.

Give AVX2/512 variants higher priority over SSE2 in order to skip
SSE testing when AVX is available. in a AVX2/x86_64/HZ=250 case this
saves in the order of 200ms of initialization time.

Signed-off-by: Dirk Müller <dmueller@suse.de>
Acked-by: Paul Menzel <pmenzel@molgen.mpg.de>
Signed-off-by: Song Liu <song@kernel.org>
2022-01-06 08:37:03 -08:00
..
test x86: update AS_* macros to binutils >=2.23, supporting ADX and AVX2 2020-04-09 00:12:48 +09:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
algos.c lib/raid6: Use strict priority ranking for pq gen() benchmarking 2022-01-06 08:37:03 -08:00
altivec.uc lib/raid6: Build proper raid6test files on powerpc 2018-03-20 16:47:52 +11:00
avx2.c lib/raid6: Use strict priority ranking for pq gen() benchmarking 2022-01-06 08:37:03 -08:00
avx512.c lib/raid6: Use strict priority ranking for pq gen() benchmarking 2022-01-06 08:37:03 -08:00
int.uc
Makefile isystem: delete global -isystem compile option 2021-09-22 09:26:24 +09:00
mktables.c raid6/test: fix a compilation warning 2020-01-13 11:44:09 -08:00
mmx.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 48 2019-05-24 17:27:13 +02:00
neon.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
neon.uc lib/raid6: use vdupq_n_u8 to avoid endianness warnings 2019-02-28 17:44:51 +00:00
recov_avx2.c x86: update AS_* macros to binutils >=2.23, supporting ADX and AVX2 2020-04-09 00:12:48 +09:00
recov_avx512.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
recov_neon_inner.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
recov_neon.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
recov_s390xc.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
recov_ssse3.c x86: remove always-defined CONFIG_AS_SSSE3 2020-04-09 00:01:59 +09:00
recov.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 48 2019-05-24 17:27:13 +02:00
s390vx.uc RAID/s390: remove invalid 'r' inline asm operand modifier 2019-06-11 09:48:25 +02:00
sse1.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 48 2019-05-24 17:27:13 +02:00
sse2.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 48 2019-05-24 17:27:13 +02:00
unroll.awk lib: raid6: fix awk build warnings 2019-12-09 18:55:03 +01:00
vpermxor.uc lib/raid6/altivec: Add vpermxor implementation for raid6 Q syndrome 2018-03-20 16:47:25 +11:00
x86.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 48 2019-05-24 17:27:13 +02:00