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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 committed by Todd Kjos
parent f09589401c
commit 1eea1cbdd3
3 changed files with 7 additions and 0 deletions
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1
drivers/android/vendor_hooks.c
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@ -188,3 +188,4 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_selinux_is_initialized);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_check_mmap_file);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_check_file_open);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_check_bpf_syscall);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_post_init_entity_util_avg);

4
include/trace/hooks/sched.h
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@ -306,6 +306,10 @@ DECLARE_RESTRICTED_HOOK(android_rvh_dequeue_task_fair,
TP_PROTO(struct rq *rq, struct task_struct *p, int flags),
TP_ARGS(rq, p, flags), 1);
DECLARE_RESTRICTED_HOOK(android_rvh_post_init_entity_util_avg,
TP_PROTO(struct sched_entity *se),
TP_ARGS(se), 1);
#endif /* _TRACE_HOOK_SCHED_H */
/* This part must be outside protection */
#include <trace/define_trace.h>

2
kernel/sched/fair.c
View File

@ -828,6 +828,8 @@ 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);
}