On Fri, 9 May 2025 08:45:46 -0700 Namhyung Kim <namhy...@kernel.org> wrote:
> > Is it possible to have many threads writing into the same > > ring buffer in that scenario ? Are all event records stamped > > with their associated PID ? As long as we have enough information > > to know which thread was associated with the timestamp cookie > > on both ends (request for callchain and saving the user callchain > > on return to userspace), we should be OK. > > Yep, basically perf sets PERF_SAMPLE_TID (and sample_id_all) which makes > every records come with PID/TID.. If LTTng is fine with this too, then we should be OK as perf and ftrace both record TID in the events. I'm assuming that BPF would be OK too. -- Steve
