Perfetto results dependent on compile time setup

[PhilipDeegan]

Hi there,

I'm trying to integrate these tools into a HPC code https://github.com/PHAREHUB/PHARE/

I've noticed that if compile with the following

CMAKE_CXX_FLAGS="-DNDEBUG -g0 -O3 -march=native -mtune=native"
CMAKE_BUILD_TYPE="Release"

I get strange results and duplicate entries in the flame graph

I get expected results with the following:

CMAKE_CXX_FLAGS="-g3 -O3 -march=native -mtune=native -fno-omit-frame-pointer -pg"
CMAKE_BUILD_TYPE="RelWithDebInfo"

Is this expected, or is there some requirement that's not met in the first case?

[PhilipDeegan]

on a closer inspection the latter config is still somewhat wrong, just less wrong

[vlkale]

Thanks for pointing this out. Actually, we (specifically me, @uliegecsm and @crtrott) are aware of problems with perfetto when building it and are trying to fix.

See Kokkos Tools PR #212 along with this branch of it: develop...cuda-11.0 that I am trying to merge into PR #212.

I think the fixes of that PR may resolve the problems you are having.

(FYI: We've decided right now we need to reach out to the developers of Perfetto to solve this, and it may take a week or two of turnaround time in talking with them to resolve that PR.)