Hi Jeff, Ok, maybe "packet headers" are not the right words. What I would like to know is how MPI application data is structured inside each packet in order to dissect and caracterize the messages.
As a first step I would like to start with TCP over Ethernet (MCA BTL TCP, I think). How can I figure out how the application data structure looks like inside network packets? In the future I would like to extend it to other network and transport combinations. What do you think? Has it sense? Thanks in advance. Víctor El lun, 16 may 2022 a las 15:45, Jeff Squyres (jsquyres) (< jsquy...@cisco.com>) escribió: > Open MPI doesn't proscribe a specific network protocol for anything. > Indeed, each network transport uses their own protocols, headers, etc. > It's basically a "each Open MPI plugin needs to be able to talk to itself", > and therefore no commonality is needed (or desired). > > Which network and Open MPI transport are you looking to sniff? > > -- > Jeff Squyres > jsquy...@cisco.com > > ________________________________________ > From: users <users-boun...@lists.open-mpi.org> on behalf of victor sv via > users <users@lists.open-mpi.org> > Sent: Sunday, May 15, 2022 3:55 PM > To: users@lists.open-mpi.org > Cc: victor sv > Subject: [OMPI users] Network traffic packets documentation > > Hello, > > I would like to sniff the OMPI network traffic from outside the MPI > application. > > I was traversing the OpenMPI code and documentation, but I have not found > any central point explaining MPI communications from the network point of > view. > > Please, is there any official documentation, or paper, or presentation or > picture about MPI packet headers? > > Sorry if this a basic question or if it was already answered. > > Thanks in advance for your help! > BR, > Víctor. >
