| From | David Carrillo-Cisneros <> | Subject | [PATCH v2 20/32] perf/x86/intel/cqm: handle inherit event and inherit_stat flag | Date | Wed, 11 May 2016 16:02:20 -0700 |
| |
Since inherited events are part of the same cqm cache group, they share the RMID and therefore they cannot provide the granularity required by inherit_stats. Changing this would in the current approach would require to create a subtree of monrs for each parent event, with its inherited events as descendats, a potential improvement for future patches.
Reviewed-by: Stephane Eranian <eranian@google.com> Signed-off-by: David Carrillo-Cisneros <davidcc@google.com> --- arch/x86/events/intel/cqm.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/x86/events/intel/cqm.c b/arch/x86/events/intel/cqm.c index b241268..5314a33 100644 --- a/arch/x86/events/intel/cqm.c +++ b/arch/x86/events/intel/cqm.c @@ -2470,6 +2470,7 @@ static int intel_cqm_event_init(struct perf_event *event) event->attr.exclude_idle || event->attr.exclude_host || event->attr.exclude_guest || + event->attr.inherit_stat || /* cqm groups share rmid */ event->attr.sample_period) /* no sampling */ return -EINVAL; -- 2.8.0.rc3.226.g39d4020
|