Validated glibc from -proposed according to test case from description: halves@focal-proposed:~$ grep -m1 "model name" /proc/cpuinfo model name : AMD Ryzen 7 3700X 8-Core Processor halves@focal-proposed:~$ ./test_memcpy64 32 32 MB = 1.340379 ms -Compare match (should be zero): 0
halves@focal-proposed:~$ dpkg -l | rg libc-bin ii libc-bin 2.31-0ubuntu9.4 amd64 GNU C Library: Binaries I've also checked benchmark results on an Intel system, and no performance regressions have been observed there either: root@halves-focal-glibc-xeon:~# grep -m1 "model name" /proc/cpuinfo model name : Intel(R) Xeon(R) CPU E5-2683 v3 @ 2.00GHz root@halves-focal-glibc-xeon:~# ./test_memcpy64 32 32 MB = 2.167214 ms -Compare match (should be zero): 0 root@halves-focal-glibc-xeon:~# dpkg -l | rg libc-bin ii libc-bin 2.31-0ubuntu9.4 amd64 GNU C Library: Binaries ** Tags removed: verification-needed verification-needed-focal ** Tags added: verification-done verification-done-focal -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1928508 Title: Performance regression on memcpy() calls for AMD Zen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1928508/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
