PCH2OPUS#

“h2opus” - A preconditioner type for, MATH2OPUS, hierarchical matrices using the H2Opus package.

Options Database Keys#

  • -pc_type h2opus - pc type to “h2opus” during a call to PCSetFromOptions()

  • -pc_h2opus_maxits - maximum number of iterations for Newton-Schultz

  • -pc_h2opus_monitor - monitor Newton-Schultz convergence

  • -pc_h2opus_atol - absolute tolerance

  • -pc_h2opus_rtol - relative tolerance

  • -pc_h2opus_norm_type - normtype

  • -pc_h2opus_hyperorder - Hyper power order of sampling

  • -pc_h2opus_leafsize - leaf size when constructed from kernel

  • -pc_h2opus_eta - admissibility condition tolerance

  • -pc_h2opus_maxrank - maximum rank when constructed from matvecs

  • -pc_h2opus_samples - number of samples to be taken concurrently when constructing from matvecs

  • -pc_h2opus_mrtol - relative tolerance for construction from sampling

  • -pc_h2opus_forcecpu - force construction of preconditioner on CPU

See Also#

MATH2OPUS, MATHTOOL, MATDENSE, MatCreateH2OpusFromKernel(), MatCreateH2OpusFromMat()

Level#

intermediate

Location#

src/ksp/pc/impls/h2opus/pch2opus.c

Examples#

src/ksp/ksp/tutorials/ex21.c

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Index of all PC routines
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Index of all manual pages