(In reply to Koichiro Iwao from comment #15) > Hi, > > This causes segfault on bhvye hypervisor running on Ryzen processors. > > FreeBSD folks are also investigating the issue from hypervisor's side but I > would like to let you know that this caused an issue because of the change > to keep your eyes on this. > > - https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=279901 > - https://bugs.almalinux.org/view.php?id=489 > - https://bbs.archlinux.org/viewtopic.php?id=295802
As for FreeBSD, I am trying to reproduce it with a different hypervisor/emulation (in this case qemu/kvm) with a Ryzen 9 5900x Zen3 core but both AlmaLinux 10 Kitten (glibc 2.39) and debian sid (glibc 2.40) boots and works without any issue. And I also verified on debian sid the selected memcpy/memmove is indeed the one that optimized with glibc change (__memcpy_avx_unaligned_erms). I even tried to run glibc memcpy/memmove tests in this VM, where they stress a lot of different sizes and alignments for different memcpy/memmove implementations. Also, my daily workstation (Ryzen 9 5900x) the uses a recent glibc that also contains this issue and I haven't see any memcpy/memmove related issue. So I am not sure if this is a glibc issue. Does it only happen on bhyve? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2030515 Title: Terrible memcpy performance on Zen 3 when using rep movsb To manage notifications about this bug go to: https://bugs.launchpad.net/glibc/+bug/2030515/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
