Hi, I have a question regarding the underlying communication process of MPI. For research purpose, I want to understand the detail about entire communication process. For example, assuming we use ob1 and tcp here, different functions are invoked from pml layer (mca_pml_ob1_send) to btl layer(btl_send), I want to know what kind of messages are passed among them and what are they look like.
Because it’s related to multi process, traditional debugger like gdb doesn’t work well, and I don’t have the access to parallel debugger at the moment. I want to know whether there’re other ways to achieve this. I’d appreciate it very much if you can give me some suggestions. Thanks, Caster
