Thank your for replying. 

Now I have read through the documents mentioned and created the component 
"tipc" and successfully built a library of it (the content is empty, of course).

So to advance the work, I will need to actually implement the library. And I 
notice btl.h and a "template" folder, which seems to demonstrate the structure 
of 
a typical btl component. However, I find myself not understand the code quite 
well. Would you please explain the structure a little bit, like what the files 
are for?

Like I understand that btl_template.h is to define interfaces for export, but 
what other files(endpoint, pro, frag) for? And why such structure? 

Thank you in advance for your kind explanation.

Regards,
Xin



________________________________________

Probably the best docs to check would be what were referred to in that thread, 
and http://www.open-mpi.org/papers/ppam-2005/ for an overview.

Read through ompi/mca/pml/pml.h.  It's the interface for the MPI "engine" 
behind OMPI's point-to-point functions, like MPI_SEND and MPI_RECV and friends. 
 The PML uses BTLs to perform all the transport-level operations (E.g., over a 
specific type of network and/or protocol).  BTLs are dumb byte-pushers; they 
have no concept of MPI semantics -- all the MPI semantics are handled in the 
upper-level PML.  BTLs are also not allowed to block; the PML will poll them 
when necessary.  Look though ompi/mca/btl/btl.h for a description of the BTL 
interface that BTLs are expected to export.

Also have a look at the following wiki pages:

https://svn.open-mpi.org/trac/ompi/wiki/NewDeveloper
https://svn.open-mpi.org/trac/ompi/wiki/UsingMercurial (same principles apply 
to git or any other DVCS)
https://svn.open-mpi.org/trac/ompi/wiki/devel/Autogen
https://svn.open-mpi.org/trac/ompi/wiki/devel/CreateComponent
https://svn.open-mpi.org/trac/ompi/wiki/BTLSemantics


On Jun 13, 2011, at 4:39 AM, Xin He I wrote:

> Hi,
>
> I just started working on adding a BTL module of TIPC (Transparent 
> Inter-process Communication) for Open-mpi.
>
> My coworker post this topic a year ago : 
> http://www.open-mpi.org/community/lists/devel/2010/05/7914.php
>
> I read the thread. I am wondering if someone could provide the documents 
> mentioned. A few unofficial documents or explanation
> of how to add a BTL module will be of great help to me :)
>
> Regards,
> Xin
> _______________________________________________
> devel mailing list
> de...@open-mpi.org
> http://www.open-mpi.org/mailman/listinfo.cgi/devel







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