diff options
| author | Andy Polyakov <appro@openssl.org> | 2017-07-20 09:48:35 +0200 |
|---|---|---|
| committer | Andy Polyakov <appro@openssl.org> | 2017-07-21 14:07:32 +0200 |
| commit | 64d92d74985ebb3d0be58a9718f9e080a14a8e7f (patch) | |
| tree | 036456c8d139587371300824d273d1c500411d1a /crypto/sha | |
| parent | bbb4ceb86eb6ea0300f744443c36fb6e980fff9d (diff) | |
x86_64 assembly pack: "optimize" for Knights Landing, add AVX-512 results.
"Optimize" is in quotes because it's rather a "salvage operation"
for now. Idea is to identify processor capability flags that
drive Knights Landing to suboptimial code paths and mask them.
Two flags were identified, XSAVE and ADCX/ADOX. Former affects
choice of AES-NI code path specific for Silvermont (Knights Landing
is of Silvermont "ancestry"). And 64-bit ADCX/ADOX instructions are
effectively mishandled at decode time. In both cases we are looking
at ~2x improvement.
AVX-512 results cover even Skylake-X :-)
Hardware used for benchmarking courtesy of Atos, experiments run by
Romain Dolbeau <romain.dolbeau@atos.net>. Kudos!
Reviewed-by: Rich Salz <rsalz@openssl.org>
Diffstat (limited to 'crypto/sha')
| -rwxr-xr-x | crypto/sha/asm/sha1-x86_64.pl | 1 | ||||
| -rwxr-xr-x | crypto/sha/asm/sha512-x86_64.pl | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/crypto/sha/asm/sha1-x86_64.pl b/crypto/sha/asm/sha1-x86_64.pl index 73ac8ee5ce..8b7bbfc261 100755 --- a/crypto/sha/asm/sha1-x86_64.pl +++ b/crypto/sha/asm/sha1-x86_64.pl @@ -86,6 +86,7 @@ # VIA Nano 9.32 7.15/+30% # Atom 10.3 9.17/+12% # Silvermont 13.1(*) 9.37/+40% +# Knights L 13.2(*) 9.68/+36% 8.30/+59% # Goldmont 8.13 6.42/+27% 1.70/+380%(**) # # (*) obviously suboptimal result, nothing was done about it, diff --git a/crypto/sha/asm/sha512-x86_64.pl b/crypto/sha/asm/sha512-x86_64.pl index bb7561e239..f2ebdfdb68 100755 --- a/crypto/sha/asm/sha512-x86_64.pl +++ b/crypto/sha/asm/sha512-x86_64.pl @@ -99,6 +99,7 @@ # VIA Nano 23.0 16.5(+39%) - 14.7 - # Atom 23.0 18.9(+22%) - 14.7 - # Silvermont 27.4 20.6(+33%) - 17.5 - +# Knights L 27.4 21.0(+30%) 19.6(+40%) 17.5 12.8(+37%) # Goldmont 18.9 14.3(+32%) 4.16(+350%) 12.0 - # # (*) whichever best applicable, including SHAEXT; |