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ANDROID: sched: add vendor hooks to handle scheduling priority

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

Bug: 163431711

Signed-off-by: JianMin Liu <jian-min.liu@mediatek.com>
Change-Id: Ic85835852690d0060666107d9108560f5023496b
This commit is contained in:
JianMin Liu 2020-08-10 23:15:09 +08:00 • committed by Todd Kjos
commit 3b773b24e6
3 changed files with 39 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

5
drivers/android/vendor_hooks.c
View file

@ -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);

25
include/trace/hooks/sched.h
View file

@ -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 */

9
kernel/sched/core.c
View file

@ -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);
}
/*