Add functionality to export flamegraph data #33
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This PR adds functionality in the paralleltimertree.cpp to generate flamegraph stack traces. When Vlasiator finishes
phiprof_flamegraph.txtis also dumped. Later on we can use any kind of script that digests the stack trace to produce nice interactive svg flamegrapghs.Example using FlameGraph. These are cool because they are interactive and searchable.
produces:
which can be opened with any modern browser and is interactive like this but I cannot host it now.