Hi All, I am trying to profile (get the call graph/call sequence of) Open MPI communication routines using GNU Profiler (gprof) since the communication calls are implemented using macros and it's harder to trace them statically. In order to do that I compiled the OpenMPI source code with following options supplied to 'configure' tool:
./configure CFLAGS=-pg CPPFLAGS=-pg --enable-debug --prefix=/home/amarathe/mpi/svn_openmpi/install When I recompiled my test MPI application that does MPI_Send and MPI_Recv with the new library, it generated gmon.out file as expected (I ran it as 'mpirun -np 2 send_recv'). However, running 'gprof' on this file didn't provide any information such as the call graphs for MPI_Send or MPI_Recv. Following is the only function call that I see in the output: $ gprof send_recv gmon.out ... ... % cumulative self self total time seconds seconds calls Ts/call Ts/call name 0.00 0.00 0.00 25 0.00 0.00 data_start ... ... I would like to know if anyone has done something similar with gprof or any other open source tool with OpenMPI code. (I found a similar, fairly recent post on the mailing list, but it seems to talk about profiling the MPI application itself and not the OpenMPI library routines - http://www.open-mpi.org/community/lists/users/2009/04/8999.php) Thanks & Regards, Aniruddha
