Messages in this thread Patch in this message | | | From | Parth Shah <> | Subject | [RFC v4 3/8] sched/core: Update turbo_sched count only when required | Date | Thu, 25 Jul 2019 12:38:52 +0530 |
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Use the get/put methods to add/remove the use of TurboSched support, such that the feature is turned on only if there is atleast one jitter task.
Signed-off-by: Parth Shah <parth@linux.ibm.com> --- kernel/sched/core.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index ee5980b4e150..60340fa18abb 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -3141,6 +3141,9 @@ static struct rq *finish_task_switch(struct task_struct *prev) mmdrop(mm); } if (unlikely(prev_state == TASK_DEAD)) { + if (unlikely(prev->flags & PF_CAN_BE_PACKED)) + turbo_sched_put(); + if (prev->sched_class->task_dead) prev->sched_class->task_dead(prev); @@ -4793,6 +4796,10 @@ static int __sched_setscheduler(struct task_struct *p, prev_class = p->sched_class; + /* Refcount tasks classified as jitter task */ + if (task_packing_flag != (p->flags & PF_CAN_BE_PACKED)) + (task_packing_flag) ? turbo_sched_get() : turbo_sched_put(); + __setscheduler(rq, p, attr, pi); __setscheduler_uclamp(p, attr); -- 2.17.1
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