On 6/18/22 08:57, Frank Ch. Eigler wrote: > >> [...] >> What Meta is doing can indeed only reasonably be done with a sampling >> profiler, with additional restrictions (in particular, they state that >> Perf's support to drop back to userspace for DWARF unwinding is too slow for >> them) [...] > > (Note FWIW that systemtap's kernel runtime does DWARF-based unwinding > for the kernel and user-designated userspace executables and > shared-libraries on demand, and it's not particularly slow at it.) How does it do that? Does it have a kernel-mode DWARF unwinder? Is this trick something that perf could use as well? -- Sincerely, Demi Marie Obenour (she/her/hers) _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
