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Add Migrate for avoiding MPI comms buffer reallocation #570

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@streeve streeve commented Sep 13, 2022

Follow on to #549 for particle migration. Extends the same idea to a new Migrate object that can be reused. Still possible to call migrate for backwards compatibility (will still be slow and reallocate a new comm buffer every time)

Also rewrites migrate tests to be more reusable

Still needs:

  • commit clean-up
  • fixes for some migrate tests
  • implementation within ParticleGridDistributor
  • Performance benchmark update & comparisons

@streeve streeve self-assigned this Sep 13, 2022
@streeve streeve marked this pull request as draft September 13, 2022 20:10
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streeve commented Sep 13, 2022

@weinbe2 just FYI that this exists

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