Re: [openib-general] [PATCH 0 of 20] [RFC] ipath driver - anotherround for review

[Bryan O'Sullivan]

On Fri, 2006-03-10 at 17:35 +0200, Michael S. Tsirkin wrote:

> Two questions on this
> 1. It is not standard ethernet nor standard IP over Infiniband either, is it?

Correct.

> Is there some documentation on the wire protocol that you use?

No, but the encapsulation is very simple and easy to figure out from
reading the code.

> Is it pathscale specific?

It doesn't have to be.

> 2. Are there practical reasons why you get lower latency and higher
> bandwidth with this than with IPoIB?

The principal reason is that we haven't had time to pay attention to
IPoIB performance yet.  The ipath_ether driver was developed before
IPoIB was usable for any real work.

> If there are optimizations, can they not be added to the standard, common
> IP over IB driver?

That's certainly our intention.  It's simply a matter of finding the
time for it.

	<b

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