PCSPAI#

Use the Sparse Approximate Inverse method [GH97]

Options Database Keys#

  • -pc_spai_epsilon - set tolerance

  • -pc_spai_nbstep - set nbsteps

  • -pc_spai_max - set max

  • -pc_spai_max_new - set maxnew

  • -pc_spai_block_size - set block size

  • -pc_spai_cache_size - set cache size

  • -pc_spai_sp - set sp

  • -pc_spai_set_verbose <true,false> - verbose output

Note#

This only works with MATAIJ matrices.

References#

GH97

M. J. Grote and T. Huckle. Parallel preconditioning with sparse approximate inverses. SIAM J. of Scient. Comput., 18:838–853, 1997.

See Also#

KSP: Linear System Solvers, PCCreate(), PCSetType(), PCType, PC, PCSPAISetEpsilon(), PCSPAISetMax(), PCSPAISetMaxNew(), PCSPAISetBlockSize(), PCSPAISetVerbose(), PCSPAISetSp(), PCSPAISetNBSteps(), PCSPAISetCacheSize()

Level#

beginner

Location#

src/ksp/pc/impls/spai/ispai.c

Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages