/* SPDX-License-Identifier: GPL-2.0 */

  /*

   * Only give sleepers 50% of their service deficit. This allows
   * them to run sooner, but does not allow tons of sleepers to
   * rip the spread apart.
   */

  SCHED_FEAT(GENTLE_FAIR_SLEEPERS, true)

  
  /*

   * Place new tasks ahead so that they do not starve already running
   * tasks
   */

  SCHED_FEAT(START_DEBIT, true)

  
  /*

   * Prefer to schedule the task we woke last (assuming it failed
   * wakeup-preemption), since its likely going to consume data we
   * touched, increases cache locality.
   */

  SCHED_FEAT(NEXT_BUDDY, false)

  
  /*
   * Prefer to schedule the task that ran last (when we did
   * wake-preempt) as that likely will touch the same data, increases
   * cache locality.
   */

  SCHED_FEAT(LAST_BUDDY, true)

  
  /*
   * Consider buddies to be cache hot, decreases the likelyness of a
   * cache buddy being migrated away, increases cache locality.
   */

  SCHED_FEAT(CACHE_HOT_BUDDY, true)

  /*

   * Allow wakeup-time preemption of the current task:
   */
  SCHED_FEAT(WAKEUP_PREEMPTION, true)

  SCHED_FEAT(HRTICK, false)
  SCHED_FEAT(DOUBLE_TICK, false)
  SCHED_FEAT(LB_BIAS, true)

  
  /*

   * Decrement CPU capacity based on time not spent running tasks

   */

  SCHED_FEAT(NONTASK_CAPACITY, true)

  
  /*
   * Queue remote wakeups on the target CPU and process them
   * using the scheduler IPI. Reduces rq->lock contention/bounces.
   */

  SCHED_FEAT(TTWU_QUEUE, true)

  /*
   * When doing wakeups, attempt to limit superfluous scans of the LLC domain.
   */
  SCHED_FEAT(SIS_AVG_CPU, false)

  SCHED_FEAT(SIS_PROP, true)

  /*
   * Issue a WARN when we do multiple update_rq_clock() calls
   * in a single rq->lock section. Default disabled because the
   * annotations are not complete.
   */
  SCHED_FEAT(WARN_DOUBLE_CLOCK, false)

  #ifdef HAVE_RT_PUSH_IPI
  /*
   * In order to avoid a thundering herd attack of CPUs that are
   * lowering their priorities at the same time, and there being
   * a single CPU that has an RT task that can migrate and is waiting
   * to run, where the other CPUs will try to take that CPUs
   * rq lock and possibly create a large contention, sending an
   * IPI to that CPU and let that CPU push the RT task to where
   * it should go may be a better scenario.
   */
  SCHED_FEAT(RT_PUSH_IPI, true)
  #endif

  SCHED_FEAT(RT_RUNTIME_SHARE, true)

  SCHED_FEAT(LB_MIN, false)

  SCHED_FEAT(ATTACH_AGE_LOAD, true)

  SCHED_FEAT(WA_IDLE, true)

  SCHED_FEAT(WA_WEIGHT, true)
  SCHED_FEAT(WA_BIAS, true)

  
  /*
   * UtilEstimation. Use estimated CPU utilization.
   */

  SCHED_FEAT(UTIL_EST, true)