[Openmp-commits] [PATCH] D102188: [OpenMP] Add experimental nesting mode

[Jon Chesterfield via Phabricator via Openmp-commits]

JonChesterfield added a comment.

There's a bunch of potentially worthwhile topology descriptions we might want. Some systems do big/little cores. Some x64 chips have numa, e.g. the threadripper cores that don't have direct access to dram. There's also the mapping from offload target to cores, where some cores may have a better/direct connection to some GPUs.

N sockets with ~equal chips and lower bandwidth between them seems a good start point. E.g. a recent epyc probably wants to present as 8 top level nodes, each with 8 cores.


Repository:
  rOMP OpenMP

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  https://reviews.llvm.org/D102188/new/

https://reviews.llvm.org/D102188