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ANDROID: GKI: sched: add rvh for new cfs task util

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A vendor hook is added in post_init_entity_util_avg before
a new cfs task's util is attached to cfs_rq's util so that
vendors can gather and modify se's information to modify
scheduling behavior and DVFS as they want.

trace_android_rvh_new_task_stats is not a proper hook because
it is called after the task's util is attached to cfs_rq's util,
which means updating cfs_rq's sched_avg and DVFS request are done.

Bug: 184219858

Signed-off-by: Choonghoon Park <choong.park@samsung.com>
Change-Id: I2deaa93297f8464895978496c9838cdffaa35b7f
This commit is contained in:
Choonghoon Park 2021-04-01 13:59:15 +09:00
parent 19cf4b1bb0
commit 5841cc213d
3 changed files with 7 additions and 0 deletions
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1
drivers/android/vendor_hooks.c
View File

@ -227,3 +227,4 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_alloc_new_buf_locked);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_reply);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_trans);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_preset);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_post_init_entity_util_avg);

4
include/trace/hooks/sched.h
View File

@ -285,6 +285,10 @@ DECLARE_RESTRICTED_HOOK(android_rvh_util_est_update,
DECLARE_HOOK(android_vh_account_task_time,
TP_PROTO(struct task_struct *p, struct rq *rq, int user_tick),
TP_ARGS(p, rq, user_tick));
DECLARE_RESTRICTED_HOOK(android_rvh_post_init_entity_util_avg,
TP_PROTO(struct sched_entity *se),
TP_ARGS(se), 1);
/* macro versions of hooks are no longer required */
#endif /* _TRACE_HOOK_SCHED_H */

2
kernel/sched/fair.c
View File

@ -824,6 +824,8 @@ void post_init_entity_util_avg(struct task_struct *p)
return;
}
/* Hook before this se's util is attached to cfs_rq's util */
trace_android_rvh_post_init_entity_util_avg(se);
attach_entity_cfs_rq(se);
}