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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: 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>
hifive-unleashed-5.1
Frederic Weisbecker 2013-07-23 02:31:04 +02:00 committed by Ingo Molnar
parent 9a545de019
commit ba8a75c16e
1 changed files with 7 additions and 0 deletions
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7
kernel/events/core.c
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@ -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)