** Also affects: openssl (Ubuntu Zesty)
Importance: Undecided
Status: New
** Also affects: openssl (Ubuntu Xenial)
Importance: Undecided
Status: New
** Changed in: openssl (Ubuntu Xenial)
Status: New => Triaged
** Changed in: openssl (Ubuntu Zesty)
Status: New => Triaged
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to openssl in Ubuntu.
https://bugs.launchpad.net/bugs/1674399
Title:
OpenSSL CPU detection for AMD Ryzen CPUs
Status in openssl package in Ubuntu:
Triaged
Status in openssl source package in Xenial:
Triaged
Status in openssl source package in Zesty:
Triaged
Status in openssl source package in Artful:
Triaged
Bug description:
AMD added support in their processors for SHA Extensions starting with
Ryzen CPU. Current OpenSSL version in Ryzens still calls SHA for SSSE3
routine as result a number of extensions were effectively masked on
Ryzen and shows no improvement.
It has been brought to my attention that :
"CPUID detection in OpenSSL does not properly detect potential optimizations
for AMD processors."
After further verification on my side :
Extended feature flags were not pulled on AMD processors, as result a
number of extensions were effectively masked on Ryzen CPUs. It should
have been reported for Excavator since it implements AVX2 extension,
but apparently nobody noticed ...
The GitHub PR:
https://github.com/openssl/openssl/pull/2849
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/openssl/+bug/1674399/+subscriptions
--
Mailing list: https://launchpad.net/~touch-packages
Post to : touch-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~touch-packages
More help : https://help.launchpad.net/ListHelp
