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sched/deadline: Add replenish_dl_new_period helper

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Wrap repeated code in helper function replenish_dl_new_period, which set
the deadline and runtime of input dl_se based on pi_of(dl_se). Note that
setup_new_dl_entity originally set the deadline and runtime base on
dl_se, which should equals to pi_of(dl_se) for non-boosted task.

Signed-off-by: Shang XiaoJing <shangxiaojing@huawei.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Link: https://lore.kernel.org/r/20220826100037.12146-1-shangxiaojing@huawei.com
This commit is contained in:
Shang XiaoJing 2022-08-26 18:00:37 +08:00 committed by Peter Zijlstra
parent 973bee493a
commit 96458e7f7d
1 changed files with 13 additions and 10 deletions
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23
kernel/sched/deadline.c
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@ -770,6 +770,14 @@ static void enqueue_task_dl(struct rq *rq, struct task_struct *p, int flags);
static void __dequeue_task_dl(struct rq *rq, struct task_struct *p, int flags);
static void check_preempt_curr_dl(struct rq *rq, struct task_struct *p, int flags);
static inline void replenish_dl_new_period(struct sched_dl_entity *dl_se,
struct rq *rq)
{
/* for non-boosted task, pi_of(dl_se) == dl_se */
dl_se->deadline = rq_clock(rq) + pi_of(dl_se)->dl_deadline;
dl_se->runtime = pi_of(dl_se)->dl_runtime;
}
/*
* We are being explicitly informed that a new instance is starting,
* and this means that:
@ -803,8 +811,7 @@ static inline void setup_new_dl_entity(struct sched_dl_entity *dl_se)
* future; in fact, we must consider execution overheads (time
* spent on hardirq context, etc.).
*/
dl_se->deadline = rq_clock(rq) + dl_se->dl_deadline;
dl_se->runtime = dl_se->dl_runtime;
replenish_dl_new_period(dl_se, rq);
}
/*
@ -836,10 +843,8 @@ static void replenish_dl_entity(struct sched_dl_entity *dl_se)
* This could be the case for a !-dl task that is boosted.
* Just go with full inherited parameters.
*/
if (dl_se->dl_deadline == 0) {
dl_se->deadline = rq_clock(rq) + pi_of(dl_se)->dl_deadline;
dl_se->runtime = pi_of(dl_se)->dl_runtime;
}
if (dl_se->dl_deadline == 0)
replenish_dl_new_period(dl_se, rq);
if (dl_se->dl_yielded && dl_se->runtime > 0)
dl_se->runtime = 0;
@ -866,8 +871,7 @@ static void replenish_dl_entity(struct sched_dl_entity *dl_se)
*/
if (dl_time_before(dl_se->deadline, rq_clock(rq))) {
printk_deferred_once("sched: DL replenish lagged too much\n");
dl_se->deadline = rq_clock(rq) + pi_of(dl_se)->dl_deadline;
dl_se->runtime = pi_of(dl_se)->dl_runtime;
replenish_dl_new_period(dl_se, rq);
}
if (dl_se->dl_yielded)
@ -1024,8 +1028,7 @@ static void update_dl_entity(struct sched_dl_entity *dl_se)
return;
}
dl_se->deadline = rq_clock(rq) + pi_of(dl_se)->dl_deadline;
dl_se->runtime = pi_of(dl_se)->dl_runtime;
replenish_dl_new_period(dl_se, rq);
}
}