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Commit 3b773b24 authored by JianMin Liu's avatar JianMin Liu Committed by Todd Kjos
Browse files

ANDROID: sched: add vendor hooks to handle scheduling priority 



Add hooks to collect scheduling information and apply vendor's
tuning when task's scheduling priority is changed

Bug: 163431711

Signed-off-by: default avatarJianMin Liu <jian-min.liu@mediatek.com>
Change-Id: Ic85835852690d0060666107d9108560f5023496b
parent cfde7b83

drivers/android/vendor_hooks.c

+5 −0
Original line number Diff line number Diff line
@@ -19,6 +19,11 @@ 
 * associated with them) to allow external modules to probe them.

 */

EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_select_task_rq_fair);

EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_rtmutex_prepare_setprio);

EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_prepare_prio_fork);

EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_finish_prio_fork);

EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_set_user_nice);

EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_setscheduler);

EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_mutex_wait_start);

EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_mutex_wait_finish);

EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_rwsem_read_wait_start);

include/trace/hooks/sched.h

+25 −0
Original line number Diff line number Diff line
@@ -15,8 +15,33 @@ struct task_struct; 
DECLARE_RESTRICTED_HOOK(android_rvh_select_task_rq_fair,

	TP_PROTO(struct task_struct *p, int prev_cpu, int sd_flag, int wake_flags, int *new_cpu),

	TP_ARGS(p, prev_cpu, sd_flag, wake_flags, new_cpu), 1);



DECLARE_RESTRICTED_HOOK(android_rvh_prepare_prio_fork,

	TP_PROTO(struct task_struct *p),

	TP_ARGS(p), 1);



DECLARE_RESTRICTED_HOOK(android_rvh_finish_prio_fork,

	TP_PROTO(struct task_struct *p),

	TP_ARGS(p), 1);



DECLARE_RESTRICTED_HOOK(android_rvh_rtmutex_prepare_setprio,

	TP_PROTO(struct task_struct *p, struct task_struct *pi_task),

	TP_ARGS(p, pi_task), 1);



DECLARE_RESTRICTED_HOOK(android_rvh_set_user_nice,

	TP_PROTO(struct task_struct *p, long *nice),

	TP_ARGS(p, nice), 1);



DECLARE_RESTRICTED_HOOK(android_rvh_setscheduler,

	TP_PROTO(struct task_struct *p),

	TP_ARGS(p), 1);

#else

#define trace_android_rvh_select_task_rq_fair(p, prev_cpu, sd_flag, wake_flags, new_cpu)

#define trace_android_rvh_prepare_prio_fork(p)

#define trace_android_rvh_finish_prio_fork(p)

#define trace_android_rvh_rtmutex_prepare_setprio(p, pi_task)

#define trace_android_rvh_set_user_nice(p, nice)

#define trace_android_rvh_setscheduler(p)

#endif

#endif /* _TRACE_HOOK_SCHED_H */

/* This part must be outside protection */

kernel/sched/core.c

+9 −0
Original line number Diff line number Diff line
@@ -27,6 +27,9 @@ 
#undef CREATE_TRACE_POINTS

#include <trace/hooks/dtask.h>



#undef CREATE_TRACE_POINTS

#include <trace/hooks/sched.h>



/*

 * Export tracepoints that act as a bare tracehook (ie: have no trace event

 * associated with them) to allow external modules to probe them.
@@ -2863,6 +2866,7 @@ int sched_fork(unsigned long clone_flags, struct task_struct *p) 
	 * Make sure we do not leak PI boosting priority to the child.

	 */

	p->prio = current->normal_prio;

	trace_android_rvh_prepare_prio_fork(p);



	uclamp_fork(p);
@@ -2895,6 +2899,7 @@ int sched_fork(unsigned long clone_flags, struct task_struct *p) 
		p->sched_class = &fair_sched_class;



	init_entity_runnable_average(&p->se);

	trace_android_rvh_finish_prio_fork(p);



	/*

	 * The child is not yet in the pid-hash so no cgroup attach races,
@@ -4392,6 +4397,7 @@ void rt_mutex_setprio(struct task_struct *p, struct task_struct *pi_task) 
	struct rq_flags rf;

	struct rq *rq;



	trace_android_rvh_rtmutex_prepare_setprio(p, pi_task);

	/* XXX used to be waiter->prio, not waiter->task->prio */

	prio = __rt_effective_prio(pi_task, p->normal_prio);
@@ -4523,6 +4529,7 @@ void set_user_nice(struct task_struct *p, long nice) 
	 */

	rq = task_rq_lock(p, &rf);

	update_rq_clock(rq);

	trace_android_rvh_set_user_nice(p, &nice);



	/*

	 * The RT priorities are set via sched_setscheduler(), but we still
@@ -4746,6 +4753,8 @@ static void __setscheduler(struct rq *rq, struct task_struct *p, 
		p->sched_class = &rt_sched_class;

	else

		p->sched_class = &fair_sched_class;



	trace_android_rvh_setscheduler(p);

}



/*