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sched/walt: Add yield case to LRRT task detection

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Reset the arrival time of the RT task when task yields.
This way, time spent during and after yield is not conidered towards RT
task runtime.

Change-Id: I8f961bca1ee7bac67dafa0238594fc4a444fdcd1
Signed-off-by: Sai Harshini Nimmala <quic_snimmala@quicinc.com>
This commit is contained in:
Sai Harshini Nimmala 2022-04-05 13:47:56 -07:00 committed by Rishabh Bhatnagar
parent b2f69d86bb
commit 851ffc330b
4 changed files with 21 additions and 15 deletions
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14
kernel/sched/walt/walt.c
View File

@ -4315,6 +4315,19 @@ static void android_rvh_build_perf_domains(void *unused, bool *eas_check)
*eas_check = true;
}
static void walt_do_sched_yield(void *unused, struct rq *rq)
{
struct task_struct *curr = rq->curr;
int mvp_prio = walt_get_mvp_task_prio(curr);
lockdep_assert_held(&rq->__lock);
if (mvp_prio != WALT_NOT_MVP)
walt_cfs_deactivate_mvp_task(curr);
if (rt_task(curr))
per_cpu(rt_task_arrival_time, cpu_of(rq)) = 0;
}
static void register_walt_hooks(void)
{
register_trace_android_rvh_wake_up_new_task(android_rvh_wake_up_new_task, NULL);
@ -4342,6 +4355,7 @@ static void register_walt_hooks(void)
register_trace_android_rvh_sched_exec(android_rvh_sched_exec, NULL);
register_trace_android_rvh_build_perf_domains(android_rvh_build_perf_domains, NULL);
register_trace_cpu_frequency_limits(walt_cpu_frequency_limits, NULL);
register_trace_android_rvh_do_sched_yield(walt_do_sched_yield, NULL);
}
atomic64_t walt_irq_work_lastq_ws;

4
kernel/sched/walt/walt.h
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@ -936,6 +936,10 @@ extern int in_sched_bug;
extern struct rq *__migrate_task(struct rq *rq, struct rq_flags *rf,
struct task_struct *p, int dest_cpu);
extern DEFINE_PER_CPU(u64, rt_task_arrival_time);
extern int walt_get_mvp_task_prio(struct task_struct *p);
extern void walt_cfs_deactivate_mvp_task(struct task_struct *p);
enum WALT_DEBUG_FEAT {
WALT_BUG_UPSTREAM,
WALT_BUG_WALT,

16
kernel/sched/walt/walt_cfs.c
View File

@ -1018,7 +1018,7 @@ static void binder_restore_priority_hook(void *data,
* they can preempt long running rtg prio tasks but binders loose their
* powers with in 3 msec where as rtg prio tasks can run more than that.
*/
static inline int walt_get_mvp_task_prio(struct task_struct *p)
int walt_get_mvp_task_prio(struct task_struct *p)
{
if (per_task_boost(p) == TASK_BOOST_STRICT_MAX)
return WALT_TASK_BOOST_MVP;
@ -1065,7 +1065,7 @@ static void walt_cfs_insert_mvp_task(struct walt_rq *wrq, struct walt_task_struc
list_add(&wts->mvp_list, pos->prev);
}
static void walt_cfs_deactivate_mvp_task(struct task_struct *p)
void walt_cfs_deactivate_mvp_task(struct task_struct *p)
{
struct walt_task_struct *wts = (struct walt_task_struct *) p->android_vendor_data1;
@ -1132,16 +1132,6 @@ static void walt_cfs_account_mvp_runtime(struct rq *rq, struct task_struct *curr
walt_cfs_insert_mvp_task(wrq, wts, false);
}
static void walt_cfs_mvp_do_sched_yield(void *unused, struct rq *rq)
{
struct task_struct *curr = rq->curr;
int mvp_prio = walt_get_mvp_task_prio(curr);
lockdep_assert_held(&rq->__lock);
if (mvp_prio != WALT_NOT_MVP)
walt_cfs_deactivate_mvp_task(curr);
}
void walt_cfs_enqueue_task(struct rq *rq, struct task_struct *p)
{
struct walt_rq *wrq = (struct walt_rq *) rq->android_vendor_data1;
@ -1349,6 +1339,4 @@ void walt_cfs_init(void)
register_trace_android_rvh_check_preempt_wakeup(walt_cfs_check_preempt_wakeup, NULL);
register_trace_android_rvh_replace_next_task_fair(walt_cfs_replace_next_task_fair, NULL);
register_trace_android_rvh_do_sched_yield(walt_cfs_mvp_do_sched_yield, NULL);
}

2
kernel/sched/walt/walt_rt.c
View File

@ -12,7 +12,7 @@
#define MSEC_TO_NSEC (1000 * 1000)
static DEFINE_PER_CPU(cpumask_var_t, walt_local_cpu_mask);
static DEFINE_PER_CPU(u64, rt_task_arrival_time);
DEFINE_PER_CPU(u64, rt_task_arrival_time);
static bool long_running_rt_task_trace_rgstrd;
void rt_task_arrival_marker(void *unused, bool preempt,