Re: some numbering clarifications

[Matt Wakeley <matt_wakeley@agilent.com>]

Julian,

Doug has a point.  If command numbering is optional, then there is no command
flow control mechanism.

-Matt

Douglas Otis wrote:

> Julo,
>
> > Pierre,
> >
> > - Command numbering. Initiator sets InitCmdRN to 0. All the
> > others can also
> > be 0.
> >    is there any drawback?
>
> The ability of the target to dynamically regulate commands has been scraped
> with this option as there is no longer a reliable command window.  Concerns
> regarding flow control, other than packing-up communication buffers, were
> resolved with use of the target command window.  This ensures a means of
> keeping latency in control by means of target pacing.  As the target is
> always expected to support this feature, does it make sense to drop command
> regulation?  This window technique could be replaced with a Service Port
> level of credit tokens. :)
>
> Doug