diff options
| author | Srivatsa Vaddagiri <vatsa@codeaurora.org> | 2014-05-12 17:59:05 -0700 |
|---|---|---|
| committer | David Keitel <dkeitel@codeaurora.org> | 2016-03-23 19:59:36 -0700 |
| commit | 7f78facb9a3dea1bcad4b41a4d253fa698ed07e8 (patch) | |
| tree | fa6125c562fe3cf49b7351a59169ef55678c5eb1 /kernel | |
| parent | 53a4978f8044d16f8e5ecfe353f10cab5ab92022 (diff) | |
sched: Add new trace events
Add trace events for update_task_ravg(), update_history(), and
set_task_cpu(). These tracepoints are useful for monitoring the
per-task and per-runqueue demand statistics.
Change-Id: Ibec9f945074ff31d1fc1a76ae37c40c8fea8cda9
Signed-off-by: Srivatsa Vaddagiri <vatsa@codeaurora.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched/core.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 8888c1081ef3..69f8aef5a849 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -91,6 +91,9 @@ #define CREATE_TRACE_POINTS #include <trace/events/sched.h> +const char *task_event_names[] = {"PUT_PREV_TASK", "PICK_NEXT_TASK", + "TASK_WAKE", "TASK_MIGRATE", "TASK_UPDATE"}; + ATOMIC_NOTIFIER_HEAD(migration_notifier_head); ATOMIC_NOTIFIER_HEAD(load_alert_notifier_head); @@ -1072,12 +1075,6 @@ void check_preempt_curr(struct rq *rq, struct task_struct *p, int flags) rq_clock_skip_update(rq, true); } -#define PUT_PREV_TASK 0 -#define PICK_NEXT_TASK 1 -#define TASK_WAKE 2 -#define TASK_MIGRATE 3 -#define TASK_UPDATE 4 - #if defined(CONFIG_SCHED_FREQ_INPUT) || defined(CONFIG_SCHED_HMP) /* Window size (in ns) */ @@ -1212,6 +1209,8 @@ compute_demand: if (p->sched_class == &fair_sched_class) inc_nr_big_small_task(rq, p); } + trace_sched_update_history(rq, p, runtime, samples, update_sum, + new_window, event); } static int __init set_sched_ravg_window(char *str) @@ -1352,6 +1351,8 @@ static void update_task_ravg(struct task_struct *p, struct rq *rq, if (event == PICK_NEXT_TASK && !p->ravg.sum) rq->curr_runnable_sum += p->ravg.partial_demand; + trace_sched_update_task_ravg(p, rq, event, wallclock); + p->ravg.mark_start = wallclock; } @@ -1839,6 +1840,9 @@ void set_task_cpu(struct task_struct *p, unsigned int new_cpu) BUG_ON((int)src_rq->prev_runnable_sum < 0); BUG_ON((int)src_rq->curr_runnable_sum < 0); + trace_sched_migration_update_sum(src_rq); + trace_sched_migration_update_sum(dest_rq); + if (p->state == TASK_WAKING) double_rq_unlock(src_rq, dest_rq); |