On Tue, Oct 10, 2017 at 08:18:13PM +0800, chengjian (D) wrote:> and what cases should the events be delivered multiple times?Task-A Task-B Task-C Task-Dfd = sys_perf_event_open(B) fd = sys_perf_event_open(C) wake_up_process(C)Here A traces B, and D traces C. When B wakes C, we want both A and D toget the event.