[Openmp-commits] [PATCH] D115826: [OpenMP][libomp] Add use-all syntax to KMP_HW_SUBSET

Jonathan Peyton via Phabricator via Openmp-commits openmp-commits at lists.llvm.org
Wed Dec 15 13:02:49 PST 2021

jlpeyton created this revision.
jlpeyton added reviewers: AndreyChurbanov, tlwilmar, hbae, Nawrin.
jlpeyton added a project: OpenMP.
Herald added subscribers: guansong, yaxunl.
jlpeyton requested review of this revision.
Herald added a reviewer: jdoerfert.
Herald added a subscriber: sstefan1.

This patch allows the user to request all resources of a particular
layer (or core-attribute). The syntax of `KMP_HW_SUBSET` is modified
so the number of units requested is optional or can be replaced with an `*` character.

`KMP_HW_SUBSET=c:intel_atom at 3` will use all the cores after offset 3
`KMP_HW_SUBSET=*c:intel_core` will use all the big cores
`KMP_HW_SUBSET=*s,*c,1t` will use all the sockets, all cores per each socket and 1 thread per core.

  rG LLVM Github Monorepo



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