perf: Account freq events per cpu (ba8a75c1) · Commits · 戴 / test

This is going to be used by the full dynticks subsystem as a finer-grained information to know when to keep and when to stop the tick. Original-patch-by:

Peter Zijlstra <peterz@infradead.org> Signed-off-by:

Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Stephane Eranian <eranian@google.com> Signed-off-by:

Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1374539466-4799-7-git-send-email-fweisbec@gmail.com Signed-off-by:

Ingo Molnar <mingo@kernel.org>

kernel/events/core.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -141,6 +141,7 @@ enum event_type_t {
		struct static_key_deferred perf_sched_events __read_mostly;
		static DEFINE_PER_CPU(atomic_t, perf_cgroup_events);
		static DEFINE_PER_CPU(atomic_t, perf_branch_stack_events);
		static DEFINE_PER_CPU(atomic_t, perf_freq_events);

		static atomic_t nr_mmap_events __read_mostly;
		static atomic_t nr_comm_events __read_mostly;
		@@ -3139,6 +3140,9 @@ static void unaccount_event_cpu(struct perf_event *event, int cpu)
		}
		if (is_cgroup_event(event))
		atomic_dec(&per_cpu(perf_cgroup_events, cpu));

		if (event->attr.freq)
		atomic_dec(&per_cpu(perf_freq_events, cpu));
		}

		static void unaccount_event(struct perf_event *event)
		@@ -6474,6 +6478,9 @@ static void account_event_cpu(struct perf_event *event, int cpu)
		}
		if (is_cgroup_event(event))
		atomic_inc(&per_cpu(perf_cgroup_events, cpu));

		if (event->attr.freq)
		atomic_inc(&per_cpu(perf_freq_events, cpu));
		}

		static void account_event(struct perf_event *event)

Admin message