Hi Jeff, As far as I am concerned, I have no problems. It would be much better that everyone knows about the OpenMPI tcp/ip internals.
Regards Pranav On Wed, May 6, 2009 at 4:47 PM, Jeff Squyres <jsquy...@cisco.com> wrote: > Thanks! > > Would you mind if I posted this on www.open-mpi.org? > > > > On Apr 25, 2009, at 10:05 AM, Timothy Hayes wrote: > > I uploaded it to http://www.hotshare.net/file/131218-829472246c.html >> >> I'm not sure if it's any good or even if it's 100% accurate; but if >> someone gets any use out of it, that would be good. >> >> Tim >> 2009/4/17 Jeff Squyres <jsquy...@cisco.com> >> On Apr 16, 2009, at 11:38 AM, Timothy Hayes wrote: >> >> From what I understand MPI_Send will hit 3 separate layers of code before >> reaching the socket file descriptors you've found. The PML (Point to Point >> Messaging Layer) is a layer that bridges the MPI semantics from the >> underlying point to point communications. The standard PML implementation is >> called 'ob1' which is what indirectly calls the code you found. MPI_Send >> should go through pml_isend() or pml_send() which will request a BTL (Byte >> Transfer Layer) modules from the BML (BTL Management Layer) and invoke the >> BTL's btl_prepare_src() or btl_alloc() functions before calling the >> btl_send(). It becomes clearer when you step through it all with a debugger >> though ;-) >> >> If you're interested, I've recently implemented a BTL component of my own >> and am now writing up a report on the process. It will be ready next week, >> so if you think it might be useful, just let me know. >> >> Ooohh... that would be positively yummy! We can even host/link to that on >> www.open-mpi.org. :-) >> >> -- >> Jeff Squyres >> Cisco Systems >> >> >> _______________________________________________ >> devel mailing list >> de...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/devel >> >> >> _______________________________________________ >> devel mailing list >> de...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/devel >> > > > -- > Jeff Squyres > Cisco Systems > > _______________________________________________ > devel mailing list > de...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/devel > -- Pranav Jadhav Graduate Student Computer Science Department Stony Brook University NY-11790.
