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| author | Naohiro Tamura <naohirot@jp.fujitsu.com> | 2021-05-27 07:44:12 +0000 |
|---|---|---|
| committer | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2021-05-27 09:47:53 +0100 |
| commit | 4f26956d5ba394eb3ade6c1c20b5c16864a00766 (patch) | |
| tree | 8857e5f8fceb8555922d2fde86a38e8b6b486f4e /sysdeps/aarch64/multiarch/Makefile | |
| parent | fa527f345cbbe852ec085932fbea979956c195b5 (diff) | |
| download | glibc-4f26956d5ba394eb3ade6c1c20b5c16864a00766.zip glibc-4f26956d5ba394eb3ade6c1c20b5c16864a00766.tar.gz glibc-4f26956d5ba394eb3ade6c1c20b5c16864a00766.tar.bz2 | |
aarch64: Added optimized memset for A64FX
This patch optimizes the performance of memset for A64FX [1] which
implements ARMv8-A SVE and has L1 64KB cache per core and L2 8MB cache
per NUMA node.
The performance optimization makes use of Scalable Vector Register
with several techniques such as loop unrolling, memory access
alignment, cache zero fill and prefetch.
SVE assembler code for memset is implemented as Vector Length Agnostic
code so theoretically it can be run on any SOC which supports ARMv8-A
SVE standard.
We confirmed that all testcases have been passed by running 'make
check' and 'make xcheck' not only on A64FX but also on ThunderX2.
And also we confirmed that the SVE 512 bit vector register performance
is roughly 4 times better than Advanced SIMD 128 bit register and 8
times better than scalar 64 bit register by running 'make bench'.
[1] https://github.com/fujitsu/A64FX
Reviewed-by: Wilco Dijkstra <Wilco.Dijkstra@arm.com>
Reviewed-by: Szabolcs Nagy <Szabolcs.Nagy@arm.com>
Diffstat (limited to 'sysdeps/aarch64/multiarch/Makefile')
| -rw-r--r-- | sysdeps/aarch64/multiarch/Makefile | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sysdeps/aarch64/multiarch/Makefile b/sysdeps/aarch64/multiarch/Makefile index 04c3f17..7500cf1 100644 --- a/sysdeps/aarch64/multiarch/Makefile +++ b/sysdeps/aarch64/multiarch/Makefile @@ -2,6 +2,7 @@ ifeq ($(subdir),string) sysdep_routines += memcpy_generic memcpy_advsimd memcpy_thunderx memcpy_thunderx2 \ memcpy_falkor memcpy_a64fx \ memset_generic memset_falkor memset_emag memset_kunpeng \ + memset_a64fx \ memchr_generic memchr_nosimd \ strlen_mte strlen_asimd endif |