diff options
Diffstat (limited to 'kernel/sched/features.h')
| -rw-r--r-- | kernel/sched/features.h | 30 |
1 files changed, 28 insertions, 2 deletions
diff --git a/kernel/sched/features.h b/kernel/sched/features.h index 143f55df890b..290874079f60 100644 --- a/kernel/sched/features.h +++ b/kernel/sched/features.h @@ -5,8 +5,24 @@ * sleep+wake cycles. EEVDF placement strategy #1, #2 if disabled. */ SCHED_FEAT(PLACE_LAG, true) +/* + * Give new tasks half a slice to ease into the competition. + */ SCHED_FEAT(PLACE_DEADLINE_INITIAL, true) +/* + * Preserve relative virtual deadline on 'migration'. + */ +SCHED_FEAT(PLACE_REL_DEADLINE, true) +/* + * Inhibit (wakeup) preemption until the current task has either matched the + * 0-lag point or until is has exhausted it's slice. + */ SCHED_FEAT(RUN_TO_PARITY, true) +/* + * Allow wakeup of tasks with a shorter slice to cancel RESPECT_SLICE for + * current. + */ +SCHED_FEAT(PREEMPT_SHORT, true) /* * Prefer to schedule the task we woke last (assuming it failed @@ -22,6 +38,18 @@ SCHED_FEAT(NEXT_BUDDY, false) SCHED_FEAT(CACHE_HOT_BUDDY, true) /* + * Delay dequeueing tasks until they get selected or woken. + * + * By delaying the dequeue for non-eligible tasks, they remain in the + * competition and can burn off their negative lag. When they get selected + * they'll have positive lag by definition. + * + * DELAY_ZERO clips the lag on dequeue (or wakeup) to 0. + */ +SCHED_FEAT(DELAY_DEQUEUE, true) +SCHED_FEAT(DELAY_ZERO, true) + +/* * Allow wakeup-time preemption of the current task: */ SCHED_FEAT(WAKEUP_PREEMPTION, true) @@ -85,5 +113,3 @@ SCHED_FEAT(WA_BIAS, true) SCHED_FEAT(UTIL_EST, true) SCHED_FEAT(LATENCY_WARN, false) - -SCHED_FEAT(HZ_BW, true) |