`diffusion_exact_adjoint` using memory for unrelated tests

[jbrillon]

There is memory usage coming from diffusion_exact_adjoint.cpp in unrelated tests. I've attached the massif file and parameter file (.txt since I cannot attach a .prm on GitHub) used for running this: valgrind --tool=massif "/home/julien/Codes/2023-02-15/PHiLiP/build_debug/bin/PHiLiP_3D" "-i" input.prm

input.txt

[dougshidong]

From what I see, it is related to static initializations of CodiPack. Let's pretend that diffusion_exact_adjoint did not exist. This memory would still be used by CodiPack. It would just occur elsewhere when CodiPack first appears in terms of initialization.

I removed diffusion_exact_adjoint from test.cpp, and the next time PHiLiP's next first encounter with CodiPack is in dg.cpp

Is there any reason for the concern for this amount of memory (174mb)? Have you noticed it grow according to problem size? Otherwise, we can mark it as expected behavior.

I believe CodiPack has been updated in the past few years as well. Worth pulling in the latest version by updating the commit the submodule points to:

https://github.com/dougshidong/PHiLiP/tree/master/submodules

[dougshidong]

The __GLOBAL You can notice this by using gdb on a test.

rbreak diffusion_exact_adjoint.cpp
run

You'll see that it breaks during program initialization.

The answer is somewhere in there: https://stackoverflow.com/a/69837439

I don't fully understand it, but I understand that this memory utilization will occur no matter what for the current CodiPack. Best person to talk to is the developer of CodiPack who is pretty friendly.