diff options
| author | Andy Polyakov <appro@openssl.org> | 2017-12-04 14:03:05 +0100 |
|---|---|---|
| committer | Andy Polyakov <appro@openssl.org> | 2017-12-08 12:57:09 +0100 |
| commit | 79337628702dc5ff5570f02d6b92eeb02a310e18 (patch) | |
| tree | 6d8c70ad956ebf9ce58b612231eb04f0e485121f /crypto/chacha/asm/chacha-x86_64.pl | |
| parent | 05de3a5be975b2834fd249005ceb0e886e9f39d1 (diff) | |
crypto/x86_64cpuid.pl: suppress AVX512F flag on Skylake-X.
It was observed that AVX512 code paths can negatively affect overall
Skylake-X system performance. But we are talking specifically about
512-bit code, while AVX512VL, 256-bit variant of AVX512F instructions,
is supposed to fly as smooth as AVX2. Which is why it remains unmasked.
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/4838)
Diffstat (limited to 'crypto/chacha/asm/chacha-x86_64.pl')
0 files changed, 0 insertions, 0 deletions