* Miguel Figueiredo <[email protected]> wrote:
> CFS does not requeue_task() on SCHED_YIELD (used by graphic drivers)
> as until 2.6.22 and -ck. [...]
as i pointed it out to you it does, the function's name changed:
/*
* sched_yield() support is very simple - we dequeue and enqueue
*/
static void yield_task_fair(struct rq *rq, struct task_struct *p)
{
struct cfs_rq *cfs_rq = task_cfs_rq(p);
u64 now = __rq_clock(rq);
/*
* Dequeue and enqueue the task to update its
* position within the tree:
*/
dequeue_entity(cfs_rq, &p->se, 0, now);
enqueue_entity(cfs_rq, &p->se, 0, now);
}
plus others have tried the SD NOP-yield hack-patch and while it slightly
improved the SD numbers it did not change the "CFS is smoother"
experience.
Ingo
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