Public bug reported: [impact] glibc 2.32 contained a number of improvements to the memcpy routines for server-grade AArch64 implementations (in particular, graviton2 & graviton3). They should be backported to focal, as the LTS releases are by far the most used on servers.
[test case] The testcase from https://bugs.launchpad.net/ubuntu/focal/+source/glibc/+bug/1928508 can be used for this too. [regression potential] Rebuilding glibc is always a little risky (toolchain bugs and incompatibilities between the old and new versions can be surprising). But the autopkgtests and some manual general testing can help here. For this specific change, there is a potential risk that the new memcpy implementation could be used on a system where it is not in fact the fastest. We should run the test case not only on the systems where it is expected to help, but other systems such as the RPi4 and the launchpad build farm to ensure performance is not regressed there. ** Affects: glibc (Ubuntu) Importance: Undecided Status: Invalid ** Affects: glibc (Ubuntu Focal) Importance: Undecided Status: New ** Also affects: glibc (Ubuntu Focal) Importance: Undecided Status: New ** Changed in: glibc (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1951032 Title: AArch64: Backport memcpy improvements To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1951032/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
