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Commit 1f12e669 authored by Srivatsa Vaddagiri's avatar Srivatsa Vaddagiri Committed by Steve Muckle
Browse files

sched: Extend ftrace event to record boost and reason code 



Add a new ftrace event to record changes to boost setting. Also extend
sched_task_load() ftrace event to record boost setting and reason code
passed to select_best_cpu(). This will be useful for debug purpose.

Change-Id: Idac72f86d954472abe9f88a8db184343b7730287
Signed-off-by: default avatarSrivatsa Vaddagiri <vatsa@codeaurora.org>
parent 232b0fe6

include/trace/events/sched.h

+26 −4
Original line number Diff line number Diff line
@@ -116,9 +116,9 @@ TRACE_EVENT(sched_enq_deq_task, 


TRACE_EVENT(sched_task_load,



	TP_PROTO(struct task_struct *p),

	TP_PROTO(struct task_struct *p, int boost, int reason),



	TP_ARGS(p),

	TP_ARGS(p, boost, reason),



	TP_STRUCT__entry(

		__array(	char,	comm,	TASK_COMM_LEN	)
@@ -127,6 +127,8 @@ TRACE_EVENT(sched_task_load, 
		__field(unsigned int,	sum_scaled		)

		__field(unsigned int,	period			)

		__field(unsigned int,	demand			)

		__field(	int,	boost			)

		__field(	int,	reason			)

	),



	TP_fast_assign(
@@ -136,11 +138,14 @@ TRACE_EVENT(sched_task_load, 
		__entry->sum_scaled	= p->se.avg.runnable_avg_sum_scaled;

		__entry->period		= p->se.avg.runnable_avg_period;

		__entry->demand		= p->ravg.demand;

		__entry->boost		= boost;

		__entry->reason		= reason;

	),



	TP_printk("%d (%s): sum=%u, sum_scaled=%u, period=%u demand=%u",

	TP_printk("%d (%s): sum=%u, sum_scaled=%u, period=%u demand=%u boost=%d reason=%d",

		__entry->pid, __entry->comm, __entry->sum,

		__entry->sum_scaled, __entry->period, __entry->demand)

		__entry->sum_scaled, __entry->period, __entry->demand,

		__entry->boost, __entry->reason)

);



TRACE_EVENT(sched_cpu_load,
@@ -188,6 +193,23 @@ TRACE_EVENT(sched_cpu_load, 
	__entry->power_cost)

);



TRACE_EVENT(sched_set_boost,



	TP_PROTO(int ref_count),



	TP_ARGS(ref_count),



	TP_STRUCT__entry(

		__field(unsigned int, ref_count			)

	),



	TP_fast_assign(

		__entry->ref_count = ref_count;

	),



	TP_printk("ref_count=%d", __entry->ref_count)

);



#endif	/* CONFIG_SCHED_HMP */



#if defined(CONFIG_SCHED_FREQ_INPUT) || defined(CONFIG_SCHED_HMP)

kernel/sched/fair.c

+4 −2
Original line number Diff line number Diff line
@@ -1485,6 +1485,7 @@ int sched_set_boost(int enable) 
	if (!old_refcount && boost_refcount)

		boost_kick_cpus();



	trace_sched_set_boost(boost_refcount);

	spin_unlock_irqrestore(&boost_lock, flags);



	return ret;
@@ -1750,10 +1751,11 @@ static int select_best_cpu(struct task_struct *p, int target, int reason) 
	int cpu_cost, min_cost = INT_MAX;

	u64 load, min_load = ULLONG_MAX, min_fallback_load = ULLONG_MAX;

	int small_task = is_small_task(p);

	int boost = sched_boost();



	trace_sched_task_load(p);

	trace_sched_task_load(p, boost, reason);



	if (small_task && !sched_boost()) {

	if (small_task && !boost) {

		best_cpu = best_small_task_cpu(p);

		goto done;

	}