On Wed, Dec 02, 2020 at 11:47:25AM -0800, Stephane Eranian wrote: > On Wed, Dec 2, 2020 at 11:28 AM Andi Kleen <a...@linux.intel.com> wrote: > > > > > + prev_cgrp = task_css_check(prev, perf_event_cgrp_id, 1)->cgroup; > > > + next_cgrp = task_css_check(next, perf_event_cgrp_id, 1)->cgroup; > > > + > > > + if (prev_cgrp != next_cgrp) > > > + perf_sw_event_sched(PERF_COUNT_SW_CGROUP_SWITCHES, 1, 0); > > > > Seems to be the perf cgroup only, not all cgroups. > > That's a big difference and needs to be documented properly. > > > We care about the all-cgroup case.
Then it's not correct I think. You need a different hook point. -Andi
