Hi George, Thank you very much for your reply. I use UCX for the communication. Is it somewhere in pml_ucx.c?
Thanks, On Tue, Oct 19, 2021 at 4:41 PM George Bosilca <bosi...@icl.utk.edu> wrote: > Masoud, > > The protocol selection and implementation in OMPI is only available for > the PML OB1, other PMLs make their own internal selection that is usually > maintained in some other code base. > > For OB1, the selection starts in ompi/mca/pml/ob1/pml_ob1_sendreq.c in the > function mca_pml_ob1_send_request_start, where the sender decide what > protocol might be the best to use according to it's memory layout and > message size. This decision is then encapsulated in a matching header, that > is forwarded to the peer. Once the matching is done on the receiving > processor (in pml_ob1_recvfrag.c starting from match_one), the receiver can > confirm the protocol proposed by the sender or can fall back to a different > protocol (such as pipeline send/recv). > > If you have questions let me know. > George. > > > > On Tue, Oct 19, 2021 at 10:15 AM Masoud Hemmatpour via devel < > devel@lists.open-mpi.org> wrote: > >> Hello all, >> >> I am new to Open MPI source code. I am trying to understand the Eager and >> Rendezvous >> implementation inside ompi code base. Could you please help and refer me >> to the source file? >> I read a bit on OMPI, then PML and BTL but I am still not sure what is >> going on. >> >> Thanks! >> >> >>