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Subject: Re: [OMPI devel] Open-MPI on TIPC
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2010-05-12 13:50:15

On May 12, 2010, at 1:21 PM, Nils Carlson wrote:

> Probably not me personally, my employer is considering financing a
> masters thesis with the aim of doing an implementation.
> Is there a guide for adding support? I took a quick look at the tcp
> code, and it wasn't all that straightforward,
> though I suppose a lot of the code is aimed at maximising performance.

There has been a paper or two written about this kind of stuff (like what David mentioned; and I have a dim recollection of someone else writing their about their experiences of adding a BTL). But nothing in the way of formal documentation, sorry. :-\

I'd be happy to chat on the phone about it.

> How long do you think a basic implementation would take?

I don't know much about the TIPC API to say. Have a look at ompi/mca/btl/btl.h -- that's the set of interfaces that need to be implemented. They're mostly focused on connecting, disconnecting, and sending/receiving data.

We do have a subsystem for monitoring fds for read and write events, so if TIPC is based on fd's, it could probably use our internal libevent to monitor for progress, etc.

Jeff Squyres
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