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Task #2490

evaluate two-step communicators

Added by Szilárd Páll over 1 year ago. Updated about 1 year ago.

Status:
New
Priority:
Normal
Category:
mdrun
Target version:
Difficulty:
uncategorized
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Description

We should-reevaluate whether/when do we need the two-step communicators implemented in mdrun (separate intra-/inter-node). Vendor optimized MPI libraries should provide optimized implementations for collectives across SMP nodes of a cluster, so we might be able to get rid of our internal optimizations in case if we determine that all modern MPIs do the right thing.

Testing is easily done by setting GMX_NO_NODECOMM env. var.

History

#1 Updated by Mark Abraham about 1 year ago

  • Target version changed from 2019 to future

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