PETSc version 3.15.5
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
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
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Index of all manual pages