added duplicate comm

[Dhruv454000]

Description

Duplicate MPI_COMM_WORLD for the default communicator.

Changes proposed:

Added a duplicate of MPI_COMM_WORLD to make library more independent.

[mtar]

GPU cluster tests are currently disabled on this Pull Request.

[Dhruv454000]

@mtar any changes required?

[mtar]

Thank you. There is one minor issue: changelog.md needs to be updated under the title "Pending Additions". It might be useful to have a short comment in the code, too.

[Dhruv454000]

@mtar done with changes.

[Dhruv454000]

@mtar can you pls review.

[ghost]

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[codecov]

Codecov Report

Merging #940 (d71d511) into main (2b10dd2) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #940   +/-   ##
=======================================
  Coverage   95.47%   95.47%           
=======================================
  Files          64       64           
  Lines        9875     9877    +2     
=======================================
+ Hits         9428     9430    +2     
  Misses        447      447           

Flag	Coverage Δ
gpu	94.56% <100.00%> (+<0.01%)	⬆️
unit	91.09% <100.00%> (+<0.01%)	⬆️

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Impacted Files	Coverage Δ
heat/core/communication.py	96.77% <100.00%> (+0.01%)	⬆️

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[Dhruv454000]

@ClaudiaComito any changes are required?

[ClaudiaComito]

run tests

[ClaudiaComito]

@Dhruv454000 thanks a lot, I just started the tests on GPU, I think all checks will pass afterwards

[ClaudiaComito]

run tests

[ClaudiaComito]

run tests

[ClaudiaComito]

run tests

[ClaudiaComito]

run tests

[Dhruv454000]

@ClaudiaComito is there any issue?

[ClaudiaComito]

run tests

[ClaudiaComito]

@ClaudiaComito is there any issue?

I think the cutoff time was exceeded on the GPU tests, because of the new tests introduced by the latest PR merge. Now the cutoff has been extended and everything works. I'm going to approve and merge this.

[ClaudiaComito]

Thanks a lot @Dhruv454000 for taking this on and congratulations on your first contribution here! 👏🏼