Thanks Tim! I should say that if anyone is contemplating writing a new BTL, I'm happy to get on the phone / webex with you for an intro to the OMPI code base, point you in the right direction, etc. Ping me on/off list and we can setup a time.
Reading reading reading documentation is all well and good, but sometimes a 30-60 min intro to the huge code base that is OMPI can save you a week's worth of fumbling around trying to divine the original coders' intents. Also, note that the mechanisms to start up a job are different than the BTL plugins. We have a layer devoted to all the run-time support in OMPI: the ORTE later (i.e., orte/ in the code tree). There are different plugins to write there to launch jobs (as compared to writing a plugin for the underlying MPI point-to-point transports). On Jun 14, 2011, at 11:32 AM, Tim Mattox wrote: > Hi Larry, > Good timing... Jeff Squyres just posted yesterday about this topic. > You can find his suggestions here: > http://www.open-mpi.org/community/lists/devel/2011/06/9366.php > -- Tim > > On Tue, Jun 14, 2011 at 11:10 AM, Lawrence Stewart > <lstewa...@csail.mit.edu> wrote: >> I apologize for asking elementary questions, I have spent some time looking >> through the open-mpi.org site and the list archives, without notable success. >> >> I am contemplating writing a btl component in order to make OpenMPI work on >> the fos experimental message-based operating system under construction at >> csail. The network semantics provided are reliable, in-order messages to >> process mailboxes, which may be shared. This <ought> to be >> straightforward, but >> >> * A search around open-mpi.org did not uncover a "how to write a BTL >> component" document. Is there one? >> >> * A quick survey through .../ompi/mca/btl did not uncover an obvious >> "example". Is there one? Or which existing component is the simplest >> non-rdma one? It might be that elan is the simplest, >> based on source lines, but it is a little tricky to untangle the elan-parts >> from the open-mpi parts. >> >> >> The other thing I'll have to tackle is figuring out whether fos has enough >> of the os interfaces needed by the rest of open-mpi, and how to get the job >> launch machinery working. >> >> -Larry >> >> >> _______________________________________________ >> devel mailing list >> de...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/devel >> > > > > -- > Tim Mattox, Ph.D. - http://homepage.mac.com/tmattox/ > timat...@open-mpi.org || tmat...@gmail.com > I'm a bright... http://www.the-brights.net/ > > _______________________________________________ > devel mailing list > de...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/devel -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
