KSPPIPEFCGSetMmax#
set the maximum number of previous directions KSPPIPEFCG will store for orthogonalization
Synopsis#
#include "petscksp.h"
PetscErrorCode KSPPIPEFCGSetMmax(KSP ksp, PetscInt mmax)
Logically Collective
Input Parameters#
ksp - the Krylov space context
mmax - the maximum number of previous directions to orthogonalize against
Options Database Key#
-ksp_pipefcg_mmax
- maximum number of previous directions
Note#
mmax + 1 directions are stored (mmax previous ones along with the current one)
and whether all are used in each iteration also depends on the truncation strategy, see KSPPIPEFCGSetTruncationType()
See Also#
KSP: Linear System Solvers, KSPPIPEFCG, KSPPIPEFCGSetTruncationType(), KSPPIPEFCGSetNprealloc()
Level#
intermediate
Location#
src/ksp/ksp/impls/fcg/pipefcg/pipefcg.c
Index of all KSP routines
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Index of all manual pages