-pc_eisenstat_omega <omega> -Sets omega
Notes
The Eisenstat trick implementation of SSOR requires about 50% of the
usual amount of floating point operations used for SSOR + Krylov method;
however, the preconditioned problem must be solved with both left
and right preconditioning.
To use SSOR without the Eisenstat trick, employ the PCSOR preconditioner,
which can be chosen with the database options
-pc_type sor -pc_sor_symmetric
Keywords
PC, Eisenstat, set, SOR, SSOR, relaxation, omega
See Also
PCSORGetOmega(), PCEisenstatSetOmega()
Level
intermediate
Location
src/ksp/pc/impls/eisens/eisen.c
Implementations
PCEisenstatGetOmega_Eisenstat in src/ksp/pc/impls/eisens/eisen.c
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages