** Description changed: + AMD added support in their processors for SHA Extensions starting with + Ryzen CPU. Current OpenSSL version in Ryzens still calls SHA for SSSE3 + routine 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
** Description changed: AMD added support in their processors for SHA Extensions starting with Ryzen CPU. Current OpenSSL version in Ryzens still calls SHA for SSSE3 - routine and shows no improvement. + 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 ** Also affects: openssl (Ubuntu Artful) Importance: Medium Status: Triaged -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1674399 Title: OpenSSL CPU detection for AMD Ryzen CPUs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssl/+bug/1674399/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
