Default pack size should depend on Kokkos execution space

parthenon-hpc-lab / parthenon

Parthenon AMR infrastructure

https://parthenon-hpc-lab.github.io/parthenon/

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Default pack size should depend on Kokkos execution space #1044

Open Yurlungur opened 3 months ago

Yurlungur commented 3 months ago

Recently had some folks hit unexpectedly poor MPI performance with parthenon on CPU because they didn't know to set parthenon/mesh/pack_size=1. We should have this default to 1 when the default execution space is serial.