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Commit ba8a75c1 authored by Frederic Weisbecker's avatar Frederic Weisbecker Committed by Ingo Molnar
Browse files

perf: Account freq events per cpu 



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


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 9a545de0

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)