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sched_ext: add helper for refill task with default slice

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Add helper for refilling task with default slice and event
statistics accordingly.

Signed-off-by: Honglei Wang <jameshongleiwang@126.com>
Acked-by: Changwoo Min <changwoo@igalia.com>
Acked-by: Andrea Righi <arighi@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Honglei Wang 2025-04-18 11:26:03 +08:00 committed by Tejun Heo
parent f203683c3e
commit 69120f8228
1 changed files with 12 additions and 12 deletions
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24
kernel/sched/ext.c
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@ -1811,6 +1811,12 @@ static void dsq_mod_nr(struct scx_dispatch_q *dsq, s32 delta)
WRITE_ONCE(dsq->nr, dsq->nr + delta);
}
static void refill_task_slice_dfl(struct task_struct *p)
{
p->scx.slice = SCX_SLICE_DFL;
__scx_add_event(SCX_EV_REFILL_SLICE_DFL, 1);
}
static void dispatch_enqueue(struct scx_dispatch_q *dsq, struct task_struct *p,
u64 enq_flags)
{
@ -2192,16 +2198,14 @@ static void do_enqueue_task(struct rq *rq, struct task_struct *p, u64 enq_flags,
* higher priority it becomes from scx_prio_less()'s POV.
*/
touch_core_sched(rq, p);
p->scx.slice = SCX_SLICE_DFL;
__scx_add_event(SCX_EV_REFILL_SLICE_DFL, 1);
refill_task_slice_dfl(p);
local_norefill:
dispatch_enqueue(&rq->scx.local_dsq, p, enq_flags);
return;
global:
touch_core_sched(rq, p); /* see the comment in local: */
p->scx.slice = SCX_SLICE_DFL;
__scx_add_event(SCX_EV_REFILL_SLICE_DFL, 1);
refill_task_slice_dfl(p);
dispatch_enqueue(find_global_dsq(p), p, enq_flags);
}
@ -3290,10 +3294,8 @@ static struct task_struct *pick_task_scx(struct rq *rq)
*/
if (keep_prev) {
p = prev;
if (!p->scx.slice) {
p->scx.slice = SCX_SLICE_DFL;
__scx_add_event(SCX_EV_REFILL_SLICE_DFL, 1);
}
if (!p->scx.slice)
refill_task_slice_dfl(p);
} else {
p = first_local_task(rq);
if (!p) {
@ -3308,8 +3310,7 @@ static struct task_struct *pick_task_scx(struct rq *rq)
p->comm, p->pid, __func__);
scx_warned_zero_slice = true;
}
p->scx.slice = SCX_SLICE_DFL;
__scx_add_event(SCX_EV_REFILL_SLICE_DFL, 1);
refill_task_slice_dfl(p);
}
}
@ -3393,9 +3394,8 @@ static int select_task_rq_scx(struct task_struct *p, int prev_cpu, int wake_flag
cpu = scx_select_cpu_dfl(p, prev_cpu, wake_flags, NULL, 0);
if (cpu >= 0) {
p->scx.slice = SCX_SLICE_DFL;
refill_task_slice_dfl(p);
p->scx.ddsp_dsq_id = SCX_DSQ_LOCAL;
__scx_add_event(SCX_EV_REFILL_SLICE_DFL, 1);
} else {
cpu = prev_cpu;
}