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Feature #1948

add warning when non-identical GPUs are used

Added by Szilárd Páll over 3 years ago. Updated over 2 years ago.

Status:
New
Priority:
Low
Assignee:
-
Category:
mdrun
Target version:
-
Difficulty:
simple
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Description

Balancing load between GPUs of very different performance is hard, and in typical bio-molecular systems DLB will be unlikely to give good results without varying threads/rank too (due to bonded and PME imbalance).

Additionally, since the automatic GPU to PP rank mapping, the users can accidentally end up using a very slow GPU with a command that previously gave errors.

Hence, we should consider adding a simple check that warns users if GPUs are not identical; possibly we could match vendor and #compute units alone.


Related issues

Related to GROMACS - Feature #1591: automatically create PP rank to GPU mappingClosed

History

#1 Updated by Szilárd Páll over 3 years ago

  • Related to Feature #1591: automatically create PP rank to GPU mapping added

#2 Updated by Szilárd Páll over 2 years ago

  • Difficulty simple added
  • Difficulty deleted (uncategorized)

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