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| author |   Alexander Monakov <amonakov@ispras.ru> | 2024-02-14 10:34:24 -1000 |
|---|---|---|
| committer |   Richard Henderson <richard.henderson@linaro.org> | 2024-05-03 08:03:04 -0700 |
| commit | d018425c324704949c7f65230def9586e71f07f5 (patch) | |
| tree | 26e879da3080a76e0e2b15f55f5453856d191142 /scripts/coverage/compare_gcov_json.py | |
| parent | util/bufferiszero: Remove SSE4.1 variant (diff) | |
| download | qemu-d018425c324704949c7f65230def9586e71f07f5.tar.xz qemu-d018425c324704949c7f65230def9586e71f07f5.zip | |
util/bufferiszero: Remove AVX512 variant
Thanks to early checks in the inline buffer_is_zero wrapper, the SIMD
routines are invoked much more rarely in normal use when most buffers
are non-zero. This makes use of AVX512 unprofitable, as it incurs extra
frequency and voltage transition periods during which the CPU operates
at reduced performance, as described in
https://travisdowns.github.io/blog/2020/01/17/avxfreq1.html
Signed-off-by: Mikhail Romanov <mmromanov@ispras.ru>
Signed-off-by: Alexander Monakov <amonakov@ispras.ru>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20240206204809.9859-4-amonakov@ispras.ru>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions