Hi All, I am new to openmpi and trying to learn the internals (source code level) of data transfer during collective operations. At first, I will limit it to intra-node (between cpu cores, and sockets) to minimize the scope of learning.
What are the best options (Looking for only free and open methods) for tracing the openmpi code? (say I want to execute alltoall collective and trace all the function calls and event callbacks that happened inside the libmpi.so on all the cores) Linux kernel has something called ftrace, it gives a neat call graph of all the internal functions inside the kernel with time, is something similar available? --Arun
