diff options
Diffstat (limited to 'kernel/sched/rt.c')
| -rw-r--r-- | kernel/sched/rt.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c index 52edd6b158ed..624bededfb85 100644 --- a/kernel/sched/rt.c +++ b/kernel/sched/rt.c @@ -1679,6 +1679,7 @@ static int find_lowest_rq_hmp(struct task_struct *task) int i; int restrict_cluster; int boost_on_big; + int pack_task, wakeup_latency, least_wakeup_latency = INT_MAX; boost_on_big = sched_boost() == FULL_THROTTLE_BOOST && sched_boost_policy() == SCHED_BOOST_ON_BIG; @@ -1695,6 +1696,8 @@ static int find_lowest_rq_hmp(struct task_struct *task) if (!cpupri_find(&task_rq(task)->rd->cpupri, task, lowest_mask)) return best_cpu; /* No targets found */ + pack_task = is_short_burst_task(task); + /* * At this point we have built a mask of cpus representing the * lowest priority tasks in the system. Now we want to elect @@ -1720,6 +1723,20 @@ static int find_lowest_rq_hmp(struct task_struct *task) if (!restrict_cluster) cpu_load = scale_load_to_cpu(cpu_load, i); + if (pack_task) { + wakeup_latency = cpu_rq(i)->wakeup_latency; + + if (wakeup_latency > least_wakeup_latency) + continue; + + if (wakeup_latency < least_wakeup_latency) { + least_wakeup_latency = wakeup_latency; + min_load = cpu_load; + best_cpu = i; + continue; + } + } + if (cpu_load < min_load || (cpu_load == min_load && (i == prev_cpu || (best_cpu != prev_cpu && @@ -1728,6 +1745,7 @@ static int find_lowest_rq_hmp(struct task_struct *task) best_cpu = i; } } + if (restrict_cluster && best_cpu != -1) break; } |