petsc-3.14.6 2021-03-30
Report Typos and Errors

PetscShmCommGet

Given a PETSc communicator returns a communicator of all ranks that share a common memory

Synopsis

#include "petscsys.h"  
PetscErrorCode PetscShmCommGet(MPI_Comm globcomm,PetscShmComm *pshmcomm)

Collective.

Input Parameter

globcomm - MPI_Comm

Output Parameter

pshmcomm - the PETSc shared memory communicator object

Notes

This should be called only with an PetscCommDuplicate() communictor

When used with MPICH, MPICH must be configured with --download-mpich-device=ch3:nemesis

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