Newsgroups: comp.parallel.mpi From: Brandon Mitchell Reply-To: bhmit1@cs.wm.edu Subject: Re: Context in mpi In-Reply-To: <75tq80$pt86@puligny.idt.cdc.fr> Message-Id: References: <75tq80$pt86@puligny.idt.cdc.fr> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=X-UNKNOWN Content-Transfer-Encoding: QUOTED-PRINTABLE Date: Mon, 28 Dec 1998 03:29:51 GMT [my news server is back up so I'll publically reply now] Hi Alain,=20 My code has two sections, one that checks the buffers to see if I've already received a valid message, and another to receive a message from anyone who isn't in the buffer and is in the comm that the user passes me. = =20 My problem is checking in the 1st part (buffer check). I need to see if a source that provided the message in my buffer is in the passed comm. =20 Is that possible in MPI (specifically MPICH)? I.e. I need an=20 "int MPI_Comm_contains_source (comm, src)" function. TIA, Brandon +--- ---+ | Brandon Mitchell * bhmit1@mail.wm.edu * http://bhmit1.home.ml.org/ | | Sometimes you have to release software with bugs. - MS Recruiter | On Thu, 24 Dec 1998, Alain Coetmeur wrote: >=20 > Brandon Mitchell a =E9crit dans le message ... > >I'm building a layer above mpi as part of a research project. It involv= es > >me keeping a buffer for up to one message from each host. I then pass t= he > >message from the buffer to the users process that calls my version of > >MPI_Recv. >=20 > > I'd like to see what sources are in the comm that is passed to > >my verion of MPI_Recv. >=20 > I don't understand your intentions. > if you want to know from where come a message, > then the MPI_Status filled by MPI_Recv contain > informations like the rank of the sender relative to the > MPI_Communicator you use. [ ... snipped ]