From: luca abeni <[email protected]> Instead of considering the "static CPU bandwidth" allocated to a SCHED_DEADLINE task (ratio between its maximum runtime and reservation period), try to use the remaining runtime and time to scheduling deadline.
Signed-off-by: luca abeni <[email protected]> --- kernel/sched/cpudeadline.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/kernel/sched/cpudeadline.c b/kernel/sched/cpudeadline.c index d21f7905b9c1..111dd9ac837b 100644 --- a/kernel/sched/cpudeadline.c +++ b/kernel/sched/cpudeadline.c @@ -114,8 +114,13 @@ static inline int dl_task_fit(const struct sched_dl_entity *dl_se, int cpu, u64 *c) { u64 cap = (arch_scale_cpu_capacity(NULL, cpu) * arch_scale_freq_capacity(cpu)) >> SCHED_CAPACITY_SHIFT; - s64 rel_deadline = dl_se->dl_deadline; - u64 rem_runtime = dl_se->dl_runtime; + s64 rel_deadline = dl_se->deadline - sched_clock_cpu(smp_processor_id()); + u64 rem_runtime = dl_se->runtime; + + if ((rel_deadline < 0) || (rel_deadline * dl_se->dl_runtime < dl_se->dl_deadline * rem_runtime)) { + rel_deadline = dl_se->dl_deadline; + rem_runtime = dl_se->dl_runtime; + } if (c) *c = cap; -- 2.20.1
