diff options
| -rw-r--r-- | kernel/sched/fair.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 9139e153671a..2e08b88cce12 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -5672,10 +5672,22 @@ static inline int find_best_target(struct task_struct *p, bool prefer_idle) if (new_util < cur_capacity) { if (cpu_rq(i)->nr_running) { - if (target_util == 0 || - target_util > new_util) { - target_cpu = i; - target_util = new_util; + if(prefer_idle) { + // Find a target cpu with lowest + // utilization. + if (target_util == 0 || + target_util < new_util) { + target_cpu = i; + target_util = new_util; + } + } else { + // Find a target cpu with highest + // utilization. + if (target_util == 0 || + target_util > new_util) { + target_cpu = i; + target_util = new_util; + } } } else if (!prefer_idle) { if (best_idle_cpu < 0 || @@ -5687,6 +5699,7 @@ static inline int find_best_target(struct task_struct *p, bool prefer_idle) } } else if (backup_capacity == 0 || backup_capacity > cur_capacity) { + // Find a backup cpu with least capacity. backup_capacity = cur_capacity; backup_cpu = i; } |