petsc-3.11.1 2019-04-17
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PetscOmpCtrlGetOmpComms

Get MPI communicators from a PETSc OMP controler

Synopsis

#include "petscsys.h"  
PetscErrorCode PetscOmpCtrlGetOmpComms(PetscOmpCtrl ctrl,MPI_Comm *omp_comm,MPI_Comm *omp_master_comm,PetscBool *is_omp_master)

Input Parameter

ctrl - a PETSc OMP controler

Output Parameter

omp_comm - a communicator that includes a master rank and slave ranks where master spawns threads
omp_master_comm - on master ranks, return a communicator that include master ranks of each omp_comm; on slave ranks, MPI_COMM_NULL will be return in reality.
is_omp_master - true if the calling process is an OMP master rank.

Notes: any output parameter can be NULL. The parameter is just ignored.

Level

developer

Location

src/sys/utils/mpishm.c
Index of all Sys routines
Table of Contents for all manual pages
Index of all manual pages