Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Only give sleepers 50% of their service deficit. This allows
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  * them to run sooner, but does not allow tons of sleepers to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * rip the spread apart.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) SCHED_FEAT(GENTLE_FAIR_SLEEPERS, true)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  * Place new tasks ahead so that they do not starve already running
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)  * tasks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) SCHED_FEAT(START_DEBIT, true)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)  * Prefer to schedule the task we woke last (assuming it failed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)  * wakeup-preemption), since its likely going to consume data we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)  * touched, increases cache locality.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) SCHED_FEAT(NEXT_BUDDY, false)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)  * Prefer to schedule the task that ran last (when we did
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)  * wake-preempt) as that likely will touch the same data, increases
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)  * cache locality.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) SCHED_FEAT(LAST_BUDDY, true)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)  * Consider buddies to be cache hot, decreases the likelyness of a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)  * cache buddy being migrated away, increases cache locality.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) SCHED_FEAT(CACHE_HOT_BUDDY, true)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)  * Allow wakeup-time preemption of the current task:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) SCHED_FEAT(WAKEUP_PREEMPTION, true)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) SCHED_FEAT(HRTICK, false)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) SCHED_FEAT(DOUBLE_TICK, false)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)  * Decrement CPU capacity based on time not spent running tasks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) SCHED_FEAT(NONTASK_CAPACITY, true)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)  * Queue remote wakeups on the target CPU and process them
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)  * using the scheduler IPI. Reduces rq->lock contention/bounces.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) SCHED_FEAT(TTWU_QUEUE, true)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)  * When doing wakeups, attempt to limit superfluous scans of the LLC domain.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) SCHED_FEAT(SIS_AVG_CPU, false)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) SCHED_FEAT(SIS_PROP, true)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)  * Issue a WARN when we do multiple update_rq_clock() calls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)  * in a single rq->lock section. Default disabled because the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)  * annotations are not complete.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) SCHED_FEAT(WARN_DOUBLE_CLOCK, false)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) #ifdef HAVE_RT_PUSH_IPI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)  * In order to avoid a thundering herd attack of CPUs that are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)  * lowering their priorities at the same time, and there being
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)  * a single CPU that has an RT task that can migrate and is waiting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)  * to run, where the other CPUs will try to take that CPUs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)  * rq lock and possibly create a large contention, sending an
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)  * IPI to that CPU and let that CPU push the RT task to where
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)  * it should go may be a better scenario.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) SCHED_FEAT(RT_PUSH_IPI, true)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) SCHED_FEAT(RT_RUNTIME_SHARE, false)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) SCHED_FEAT(LB_MIN, false)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) SCHED_FEAT(ATTACH_AGE_LOAD, true)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) SCHED_FEAT(WA_IDLE, true)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) SCHED_FEAT(WA_WEIGHT, true)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) SCHED_FEAT(WA_BIAS, true)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)  * UtilEstimation. Use estimated CPU utilization.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) SCHED_FEAT(UTIL_EST, true)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) SCHED_FEAT(UTIL_EST_FASTUP, true)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) SCHED_FEAT(ALT_PERIOD, true)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) SCHED_FEAT(BASE_SLICE, true)