Notes: Each processor can have one or more blocks, but a block cannot be shared by more Many brthan one processor. Defaults to one block per processor. Many br
To set options on the solvers for each block append -sub_ to all the KSP, KSP, and PC Many broptions database keys. For example, -sub_pc_type ilu -sub_pc_factor_levels 1 -sub_ksp_type preonly Many br
To set the options on the solvers separate for each block call PCBJacobiGetSubKSP() Many brand set the options directly on the resulting KSP object (you can access its PC Many brKSPGetPC()) Many br
For CUSP vectors it is recommended to use exactly one block per MPI process for best Many brperformance. Different block partitioning may lead to additional data transfers Many brbetween host and GPU that lead to degraded performance. Many br
Many br
Level:beginner
Location:src/ksp/pc/impls/bjacobi/bjacobi.c
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages