1.3. Q. What MFlops am I getting in all loops?
Prev     Next

1.3. Q. What MFlops am I getting in all loops?

A. Create a flat profile with PAPI_FP_INS/OPS and time (-multiplecounters) with loop instrumentation.

Figure 1.3. MFlops per loop

MFlops per loop

Here is how to generate a flat profile with FP operations 

% setenv TAU_MAKEFILE /opt/apps/tau/tau-2.17.1/x86_64/lib/Makefile.tau-multiplecounters-papi-mpi-pdt-pgi
% setenv TAU_OPTIONS ‘-optTauSelectFile=select.tau –optVerbose’
% cat select.tau
  BEGIN_INSTRUMENT_SECTION
  loops routine=“#”
  END_INSTRUMENT_SECTION

% set path=(/opt/apps/tau/tau-2.17.1/x86_64/bin $path)
% make F90=tau_f90.sh
(Or edit Makefile and change F90=tau_f90.sh)
% setenv COUNTER1 GET_TIME_OF_DAY
% setenv COUNTER2 PAPI_FP_INS
% qsub  run.job
% paraprof -–pack app.ppk
	Move the app.ppk file to your desktop. 
% paraprof app.ppk
  Choose 'Options' -> 'Show Derived Panel' -> Arg 1 = PAPI_FP_INS, Arg 2 =
	GET_TIME_OF_DAY, Operation = Divide -> Apply, close.
Prev     Next
1.2. Q. What loops account for the most time? How much?  Home  1.4. Q. Who calls MPI_Barrier() Where?