PCShellSetPreSolve#
Sets routine to apply to the operators/vectors before a KSPSolve() is applied. This usually does something like scale the linear system in some application specific way.
Synopsis#
#include "petscpc.h"
PetscErrorCode PCShellSetPreSolve(PC pc, PCShellPSolveFn *presolve)
Logically Collective
Input Parameters#
pc - the preconditioner context
presolve - the application-provided presolve routine, see
PCShellPSolveFn
Note#
You can get the PCSHELL context set with PCShellSetContext() using PCShellGetContext() if needed by presolve.
See Also#
KSP: Linear System Solvers, PCSHELL, PCShellPSolveFn, PCShellSetApplyRichardson(), PCShellSetSetUp(), PCShellSetApplyTranspose(), PCShellSetPostSolve(), PCShellSetContext(), PCShellGetContext()
Level#
advanced
Location#
Implementations#
PCShellSetPreSolve_Shell() in src/ksp/pc/impls/shell/shellpc.c
Index of all PC routines
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Index of all manual pages