feat(smp): add MPI-distributed island model#86
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evvaletov wants to merge 3 commits intonojhan:masterfrom
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feat(smp): add MPI-distributed island model#86evvaletov wants to merge 3 commits intonojhan:masterfrom
evvaletov wants to merge 3 commits intonojhan:masterfrom
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Seems awesome, I would review that once the history is clean. |
added 3 commits
February 28, 2026 19:55
Add virtual finalize() and hasFinalize() to moeoAlgo/moeoPopAlgo hierarchy. NSGA-II implements finalize() to recompute fitness and diversity assignments after population modifications (e.g. immigrant integration in island model).
Template wrapper making any type T serializable via eoserial::Persistent, required for transferring populations between MPI ranks in the island model.
Add MPI_IslandModel: a distributed island model where each MPI rank runs one island with asynchronous migration via MPI send/receive. Key features: - Single-message MPI protocol: MPI_Isend (data) + MPI_Get_count/ MPI_Recv on receive side. Avoids the two-message (size + data) pattern that can deadlock under oversubscription. - MPI_Iprobe for non-blocking message detection (upstream's communicator lacks iprobe()) - Non-blocking sends with PendingSend tracking and MPI_Test cleanup - Receive-before-send ordering to prevent message accumulation - Post-loop drain with safe shutdown (cancel pending sends) - Configurable poll interval (default 1s) - Thread-safe update method for asynchronous migration - Debug-level migration logging via eo::log Extended Island with: - IslandType enum (HOMOGENEOUS/HETEROGENEOUS) for conditional immigrant re-evaluation - IslandModelKind enum (None/Shared/MPI) replacing string dispatch - algoEOT template parameter for algorithm/individual type mismatch - finalize() call after population integration Extended islandModelWrapper with MPI_IslandModel overloads, initial_values parameter, and algoEOT support.
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Summary
Add
MPI_IslandModel: a distributed island model where each MPI rank runsone island with asynchronous migration via MPI send/receive.
MPI_Isend/MPI_Get_count/MPI_Recv,avoiding the two-message pattern in
communicator::recv()that candeadlock under oversubscription
MPI_Iprobefor non-blocking message detectionPendingSendtracking andMPI_TestcleanupExtended
IslandwithIslandType/IslandModelKindenums,algoEOTtemplate parameter, and
finalize()call after population integration.Extended
islandModelWrapperwithMPI_IslandModeloverloads.Dependencies
finalize()lifecycle hookSerializableBasefor MPI serializationOnce those are merged, this branch can be rebased to drop the dependency
commits.
New files
smp/src/MPI_IslandModel.hPendingSendstructsmp/src/MPI_IslandModel.cppModified files
smp/src/abstractIsland.hsetModel()smp/src/island.hIslandType/IslandModelKindenums,algoEOTtemplate paramsmp/src/island.cppsend()/receive()MPI dispatch, heterogeneous re-evaluationsmp/src/islandModelWrapper.hMPI_IslandModelsmp/src/smp.hMPI_IslandModel.hBackward compatibility
Existing code using
Island<EOAlgo, EOT>continues to work —bEOTdefaults to
EOTandalgoEOTdefaults toEOT.