kernel/sched/pelt.h

   1 #ifdef CONFIG_SMP
   2
   3 int __update_load_avg_blocked_se(u64 now, int cpu, struct sched_entity *se);
   4 int __update_load_avg_se(u64 now, int cpu, struct cfs_rq *cfs_rq, struct sched_entity *se);
   5 int __update_load_avg_cfs_rq(u64 now, int cpu, struct cfs_rq *cfs_rq);
   6 int update_rt_rq_load_avg(u64 now, struct rq *rq, int running);
   7 int update_dl_rq_load_avg(u64 now, struct rq *rq, int running);
   8
   9 #ifdef CONFIG_HAVE_SCHED_AVG_IRQ
  10 int update_irq_load_avg(struct rq *rq, u64 running);
  11 #else
  12 static inline int
  13 update_irq_load_avg(struct rq *rq, u64 running)
  14 {
  15         return 0;
  16 }
  17 #endif
  18
  19 /*
  20  * When a task is dequeued, its estimated utilization should not be update if
  21  * its util_avg has not been updated at least once.
  22  * This flag is used to synchronize util_avg updates with util_est updates.
  23  * We map this information into the LSB bit of the utilization saved at
  24  * dequeue time (i.e. util_est.dequeued).
  25  */
  26 #define UTIL_AVG_UNCHANGED 0x1
  27
  28 static inline void cfs_se_util_change(struct sched_avg *avg)
  29 {
  30         unsigned int enqueued;
  31
  32         if (!sched_feat(UTIL_EST))
  33                 return;
  34
  35         /* Avoid store if the flag has been already set */
  36         enqueued = avg->util_est.enqueued;
  37         if (!(enqueued & UTIL_AVG_UNCHANGED))
  38                 return;
  39
  40         /* Reset flag to report util_avg has been updated */
  41         enqueued &= ~UTIL_AVG_UNCHANGED;
  42         WRITE_ONCE(avg->util_est.enqueued, enqueued);
  43 }
  44
  45 #else
  46
  47 static inline int
  48 update_cfs_rq_load_avg(u64 now, struct cfs_rq *cfs_rq)
  49 {
  50         return 0;
  51 }
  52
  53 static inline int
  54 update_rt_rq_load_avg(u64 now, struct rq *rq, int running)
  55 {
  56         return 0;
  57 }
  58
  59 static inline int
  60 update_dl_rq_load_avg(u64 now, struct rq *rq, int running)
  61 {
  62         return 0;
  63 }
  64
  65 static inline int
  66 update_irq_load_avg(struct rq *rq, u64 running)
  67 {
  68         return 0;
  69 }
  70 #endif
  71
  72