[Libmesh-users] Questions regarding profiling examples using gprof

[Boris B. <bor...@bu...>]

Hello all,

I've been trying to do some profiling of some of the libMesh examples and
am having some issues understanding the generated gprof output. It seems
like much of the data that I am expecting is missing from the output
(please see attached logs). I compile with METHOD=prof (with the minor
hiccup mentioned in issue #1776) and the example builds as expected with
the -pg flags appearing in both the compilation and linker lines of the
example as well as the config.log summary during the library build.

For the example gprof logs attached, I ran a vanilla intro/ex3 where the
only change consisted of an increase in the number of elements to allow for
a nontrivial runtime. Basically the only thing that gprof seems to report
is all the time being spent in assemble and exact_solution, with very
little mention other things which are clearly visible in the libMesh
perflog.

Has anyone run into similar issues or have any clues as to what I can try
to produce more granular output?

Thanks for any info you can provide!

- Boris