CFSplittingType

The coarse/fine (CF) splitting algorithm used by PCAIR

Synopsis

typedef enum {
   CF_PMISR_DDC,
   CF_DIAG_DOM,
   CF_PMIS,
   CF_PMIS_DIST2,
   CF_AGG,
   CF_PMIS_AGG,
}  CFSplittingType;

Values

• CF_PMISR_DDC - two-pass splitting giving a diagonally dominant fine-fine block (PMISR DDC)

• CF_DIAG_DOM - two-pass splitting enforcing a fixed diagonal dominance ratio (set by the strong threshold) in the fine-fine block

• CF_PMIS - PMIS with a symmetrised strength matrix

• CF_PMIS_DIST2 - distance-2 PMIS, with strength matrix formed from S’S + S and then symmetrised

• CF_AGG - aggregation with root-nodes as C points; processor-local aggregation in parallel

• CF_PMIS_AGG - PMIS on boundary nodes with a symmetrised strength matrix, then processor-local aggregation

See Also

KSP: Linear System Solvers, PCAIR, PCAIRSetCFSplittingType(), PCAIRGetCFSplittingType(), PCAIRSetStrongThreshold()

Level

intermediate

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Index of all manual pages