PCMPIServerBegin#
starts a server that runs on the rank != 0 MPI processes waiting to process requests for parallel KSP
solves and management of parallel KSP
objects.
Synopsis#
Logically Collective on all MPI ranks except 0
Options Database Keys#
-mpi_linear_solver_server - causes the PETSc program to start in MPI linear solver server mode where only the first MPI rank runs user code
-mpi_linear_solver_server_view - displays information about the linear systems solved by the MPI linear solver server
Note#
This is normally started automatically in PetscInitialize()
when the option is provided
Developer Notes#
When called on rank zero this sets PETSC_COMM_WORLD
to PETSC_COMM_SELF
to allow a main program
written with PETSC_COMM_WORLD
to run correctly on the single rank while all the ranks
(that would normally be sharing PETSC_COMM_WORLD
) to run the solver server.
Can this be integrated into the PetscDevice
abstraction that is currently being developed?
See Also#
Level#
developer
Location#
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages