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 <[email protected]> Signed-off-by: Frederic Weisbecker <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]> Cc: Stephane Eranian <[email protected]> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
