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 <pet...@infradead.org>
Signed-off-by: Frederic Weisbecker <fweis...@gmail.com>
Cc: Jiri Olsa <jo...@redhat.com>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: Namhyung Kim <namhy...@kernel.org>
Cc: Ingo Molnar <mi...@kernel.org>
Cc: Arnaldo Carvalho de Melo <a...@redhat.com>
Cc: Stephane Eranian <eran...@google.com>
---
kernel/events/core.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/kernel/events/core.c b/kernel/events/core.c
index b40c3db..f9bd39b 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -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)
@@ -6473,6 +6477,9 @@ 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)
--
1.7.5.4
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