PCREDISTRIBUTE

Redistributes a matrix for load balancing, removing the rows that only have a diagonal entry and then applys a KSP to that new matrix Options for the redistribute preconditioners can be set with -redistribute_ksp_xxx <values> and -redistribute_pc_xxx <values>

Notes: Usually run this with -ksp_type preonly

If you have used MatZeroRows() to eliminate (for example, Dirichlet) boundary conditions for a symmetric problem then you can use, for example, -ksp_type preonly -pc_type redistribute -redistribute_ksp_type cg -redistribute_pc_type bjacobi -redistribute_sub_pc_type icc to take advantage of the symmetry.

See Also

PCCreate(), PCSetType(), PCType (for list of available types)

Level:intermediate
Location:
src/ksp/pc/impls/redistribute/redistribute.c
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages