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

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Message-Id: <200707302205.15790.elmig@debianpt.org>
Date:	Mon, 30 Jul 2007 22:05:15 +0100
From:	Miguel Figueiredo <elmig@...ianpt.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	ck@....kolivas.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [ck] Re: SD still better than CFS for 3d ?(was Re: 2.6.23-rc1)

Em Segunda, 30 de Julho de 2007 19:38, Ingo Molnar escreveu:
> * Miguel Figueiredo <elmig@...ianpt.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
http://www.DebianPT.org
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