PetscOmpCtrlCreate#

create a PETSc OpenMP controller, which manages PETSc’s interaction with third party libraries that use OpenMP

Synopsis#

#include "petscsys.h"  
PetscErrorCode PetscOmpCtrlCreate(MPI_Comm petsc_comm, PetscInt nthreads, PetscOmpCtrl *pctrl)

Input Parameters#

  • petsc_comm - a communicator some PETSc object (for example, a matrix) lives in

  • nthreads - number of threads per MPI rank to spawn in a library using OpenMP. If nthreads = -1, let PETSc decide a suitable value

Output Parameter#

  • pctrl - a PETSc OpenMP controller

Developer Note#

Possibly use the variable PetscNumOMPThreads to determine the number for threads to use

See Also#

PetscOmpCtrlDestroy(), PetscOmpCtrlGetOmpComms(), PetscOmpCtrlBarrier(), PetscOmpCtrlOmpRegionOnMasterBegin(), PetscOmpCtrlOmpRegionOnMasterEnd(),

Level#

developer

Location#

src/sys/utils/mpishm.c

Edit on GitLab

Index of all Sys routines
Table of Contents for all manual pages
Index of all manual pages