Re: [ck] Re: SD still better than CFS for 3d ?(was Re: 2.6.23-rc1)

Miguel Figueiredo
2007-07-30T21:05:49Z

Em Segunda, 30 de Julho de 2007 19:38, Ingo Molnar escreveu:
> * Miguel Figueiredo <elmig@debianpt.org> wrote:
> > in mainline (2.6.22):
> > /**
> > * sys_sched_yield - yield the current processor to other threads.
> > *
> > * This function yields the current CPU by moving the calling thread
> > * to the expired array. If there are no other threads running on this
> > * CPU then this function will return.
> > */
> >

[...]

> this is what CFS does:
>
> 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);
> }
>
> Ingo

So the difference from mainline (2.6.22) is that now you removed
requeue_task(), is that it?
--

Com os melhores cumprimentos/Best regards,

Miguel Figueiredo