Preconditioner - HYPRE - PARASAILS
Usage:
-pc_type hypre -pc_hypre_type parasails
Options:
-pc_hypre_parasails_nlevels
Number of number of levels. Default = 1
-pc_hypre_parasails_thresh
Threshold. Default = 0.1
-pc_hypre_parasails_filter
filter. Default = 0.1
-pc_hypre_parasails_loadbal
Load balance. Default = 0
-pc_hypre_parasails_logging
Print info to screen
-pc_hypre_parasails_reuse
Reuse nonzero pattern in preconditioner
-pc_hypre_parasails_sym
(choose one of) Default = nonsymmetric
nonsymmetric
SPD
nonsymmetric,SPD
Info: Since the hypre preconditioner can be utilized as a solver as well, sometimes this should be run with the option
-ksp_type preonly