PETSCPARTITIONERMULTISTAGE

“multistage” - A PetscPartitioner object using a multistage distribution strategy

Options Database Keys

• -petscpartitioner_multistage_strategy - Either PETSCPARTITIONER_MS_STRATEGY_NODE, or PETSCPARTITIONER_MS_STRATEGY_MSECTION

• -petscpartitioner_multistage_node_size - Number of processes per computing node (or PETSC_DECIDE)

• -petscpartitioner_multistage_node_interleaved - Assign ranks round-robin.

• -petscpartitioner_multistage_msection - Number of splits per level in recursive m-section splits (use 2 for bisection)

• -petscpartitioner_multistage_tpwgts - Use target partition weights in stage partitioner

Notes

The default multistage strategy use PETSCPARTITIONER_MS_STRATEGY_NODE and automatically discovers node information using MPI_Comm_split_type. PETSCPARTITIONER_MS_STRATEGY_MSECTION is more for testing purposes. Options for single stage partitioners are prefixed by -petscpartitioner_multistage_levels_. For example, to use parmetis in all stages, -petscpartitioner_multistage_levels_petscpartitioner_type parmetis Finer grained control is also possible: -petscpartitioner_multistage_levels_0_petscpartitioner_type parmetis, -petscpartitioner_multistage_levels_1_petscpartitioner_type simple

See Also

PetscPartitionerType, PetscPartitionerCreate(), PetscPartitionerSetType()

Level

intermediate

Location

src/dm/partitioner/impls/multistage/mspart.c

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Index of all MatGraphOperations routines
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