[altq 1040] Re: Diffserv scheduler

[saroj <saroj.tripathy@wipro.com>]

hi,


For diffserv scheduling  implementatio when do we use _rmc_wrr_dequeue_next
or _rmc_prr_dequeue_next . Can I go ahead and use only _rmc_wrr_dequeue_next
and discard of _prr_dequeue_next . In which scenario do we use
_prr_dequeue_next .. Is each ethernet driver enabled to a particular type of
dequeueing i.e either priority or weighted round robin.



mbuf_t *
rmc_dequeue_next(ifd, mode)
 struct rm_ifdat *ifd;
 int mode;
{
 if (ifd->queued_ >= ifd->maxqueued_)
  return (NULL);
 else if (ifd->wrr_)
  return (_rmc_wrr_dequeue_next(ifd, mode));
 else
  return (_rmc_prr_dequeue_next(ifd, mode));
}




Thanks and Regards,
Saroj















Kenjiro Cho wrote:

> saroj.tripathy@wipro.com wrote:
> > I  have to implement a sceduler for Diffserv .Can the same
> > altq_Rmclass.c be used for the scheduler in this case. How will it take
> > care of calling different scheduling algorithms (PRR,WRR) in case of
> > EF,AF
>
> diffserv EF PHB can be realized by any queueing discipline able to
> guarantee the assigned rate.  In ALTQ, PRIQ, H-FSC and CBQ can be
> used.
>
> diffserv AF PHB can be realzied by combining a marker (trTCM or tswTCM
> in ALTQ) and a buffer management mechanism (RIO in ALTQ).
> RIO can be used with PRIQ, H-FSC and CBQ.
>
> -Kenjiro

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