PetscOmpCtrlGetOmpComms

Get MPI communicators from a PETSc OMP controller

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 controller

Output Parameters

• 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.

Note

Any output parameter can be NULL. The parameter is just ignored.

See Also

PetscOmpCtrlCreate(), PetscOmpCtrlDestroy(), PetscOmpCtrlBarrier(), PetscOmpCtrlOmpRegionOnMasterBegin(), PetscOmpCtrlOmpRegionOnMasterEnd(),

Level

developer

Location

src/sys/utils/openmp/mpmpishm.c

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