Re: [patch[ Simple Topology API

[Rik van Riel]

On 16 Jul 2002, Eric W. Biederman wrote:
> Sandy Harris <[e-mail]> writes:

> >     I/O -- A ------ B ------ E ------ G -- I/O
> >            |        |        |        |
> >            |        |        |        |
> >     I/O -- C ------ D ------ F ------ H -- I/O
>
> > I suspect latency may become an issue when more than one link is
> > involved and there can be contention.
>
> I think the 8-way topology is a little more interesting than
> presented.  But if not it does look like you can run into issues.

IIRC

    I/O -- A ------ B ------ E ------ G -- I/O
           |          \    /          |
           |           \  /           |
           |            XX            |
           |           /  \           |
           |          /    \          |
    I/O -- C ------ D ------ F ------ H -- I/O

Where B is connected to F and D to E.  Obviously this
setup has a maximum hop count of 3 from any cpu to any
other cpu, as opposed to a maximum hop count of 4 for
the simple ladder.

regards,

Rik
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