Thank you very much George. So, I try to look at UCX source code.
On Tue, Oct 19, 2021 at 5:00 PM George Bosilca <bosi...@icl.utk.edu> wrote: > No, the PML UCX in OMPI is just a shim layer of translation from our API > into UCX API. The selection of the communication protocol you are > interested in is deep inside the UCX code. You will need to talk with UCX > developers about that. > > George. > > > On Tue, Oct 19, 2021 at 10:57 AM Masoud Hemmatpour <mashe...@gmail.com> > wrote: > >> >> 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! >>>> >>>> >>>>
