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ANDROID: sched/events: Introduce find_best_target trace event

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Adapated from the existing trace event from android-4.14.

Change-Id: I9785e692fb0af087c236906d7f47fed1b20690f5
Signed-off-by: Quentin Perret <quentin.perret@arm.com>
This commit is contained in:
Quentin Perret 2018-05-31 11:15:26 +01:00
parent 8eb64d5f73
commit 171db7dcae
2 changed files with 44 additions and 0 deletions
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41
include/trace/events/sched.h
View File

@ -779,6 +779,47 @@ TRACE_EVENT(sched_util_est_cpu,
__entry->util_avg,
__entry->util_est_enqueued)
);
/*
* Tracepoint for find_best_target
*/
TRACE_EVENT(sched_find_best_target,
TP_PROTO(struct task_struct *tsk, bool prefer_idle,
unsigned long min_util, int best_idle, int best_active,
int target, int backup),
TP_ARGS(tsk, prefer_idle, min_util, best_idle,
best_active, target, backup),
TP_STRUCT__entry(
__array( char, comm, TASK_COMM_LEN )
__field( pid_t, pid )
__field( unsigned long, min_util )
__field( bool, prefer_idle )
__field( int, best_idle )
__field( int, best_active )
__field( int, target )
__field( int, backup )
),
TP_fast_assign(
memcpy(__entry->comm, tsk->comm, TASK_COMM_LEN);
__entry->pid = tsk->pid;
__entry->min_util = min_util;
__entry->prefer_idle = prefer_idle;
__entry->best_idle = best_idle;
__entry->best_active = best_active;
__entry->target = target;
__entry->backup = backup;
),
TP_printk("pid=%d comm=%s prefer_idle=%d "
"best_idle=%d best_active=%d target=%d backup=%d",
__entry->pid, __entry->comm, __entry->prefer_idle,
__entry->best_idle, __entry->best_active,
__entry->target, __entry->backup)
);
#endif /* CONFIG_SMP */
#endif /* _TRACE_SCHED_H */

3
kernel/sched/fair.c
View File

@ -6789,6 +6789,9 @@ static void find_best_target(struct sched_domain *sd, cpumask_t *cpus,
target:
cpumask_set_cpu(target_cpu, cpus);
}
trace_sched_find_best_target(p, prefer_idle, min_util, best_idle_cpu,
best_active_cpu, target_cpu, backup_cpu);
}
/*