6.4. Q. Who calls MPI_Barrier() Where?
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6.4. Q. Who calls MPI_Barrier() Where?

A. Create a callpath profile with given depth.

Figure 6.4. Callpath Profile

Callpath Profile

Here is how to generate a callpath profile with MPI 

% setenv TAU_MAKEFILE
% /opt/apps/tau/tau2/x86_64/lib/Makefile.tau-mpi-pdt
% set path=(/opt/apps/tau/tau2/x86_64/bin $path)
% make F90=tau_f90.sh
(Or edit Makefile and change F90=tau_f90.sh)
% setenv TAU_CALLPATH 1
% setenv TAU_CALLPATH_DEPTH 100

% qsub  run.job
% paraprof -–pack app.ppk
	Move the app.ppk file to your desktop. 
% paraprof app.ppk
(Windows -> Thread -> Call Graph)
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