diff options
| author | Morten Rasmussen <Morten.Rasmussen@arm.com> | 2012-06-25 16:11:44 +0100 |
|---|---|---|
| committer | Viresh Kumar <viresh.kumar@linaro.org> | 2012-07-25 10:03:59 +0100 |
| commit | e97ad684522fa231bbb9da3d0f0c89bcda345e6e (patch) | |
| tree | 10451d3c41c5b713500420511378f4deda9d4568 | |
| parent | ff8a9da13f02c8d3a39be61f1cf3542a864b878b (diff) | |
sched: Add HMP forced task migration ftrace event
Adds ftrace event for tracing forced task migrations using HMP
optimized scheduling.
Signed-off-by: Morten Rasmussen <Morten.Rasmussen@arm.com>
| -rw-r--r-- | include/trace/events/sched.h | 26 | ||||
| -rw-r--r-- | kernel/sched/fair.c | 1 |
2 files changed, 27 insertions, 0 deletions
diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h index 002317926c2c..2c50a06fbedd 100644 --- a/include/trace/events/sched.h +++ b/include/trace/events/sched.h @@ -551,6 +551,32 @@ TRACE_EVENT(sched_task_usage_ratio, __entry->comm, __entry->pid, __entry->ratio) ); + +/* + * Tracepoint for HMP (CONFIG_SCHED_HMP) task migrations. + */ +TRACE_EVENT(sched_hmp_migrate, + + TP_PROTO(struct task_struct *tsk, int val), + + TP_ARGS(tsk, val), + + TP_STRUCT__entry( + __array(char, comm, TASK_COMM_LEN) + __field(pid_t, pid) + __field(int, val) + ), + + TP_fast_assign( + memcpy(__entry->comm, tsk->comm, TASK_COMM_LEN); + __entry->pid = tsk->pid; + __entry->val = val; + ), + + TP_printk("comm=%s pid=%d val=%d", + __entry->comm, __entry->pid, + __entry->val) +); #endif /* _TRACE_SCHED_H */ /* This part must be outside protection */ diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 5033c208ab92..f705a87ac7b5 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -5572,6 +5572,7 @@ static void hmp_force_up_migration(int this_cpu) target->push_cpu = hmp_select_fast_cpu(p); target->migrate_task = p; force = 1; + trace_sched_hmp_migrate(p, 1); } } raw_spin_unlock_irqrestore(&target->lock, flags); |