petsc-3.11.4 2019-09-28
PetscShmCommGlobalToLocal
Given a global rank returns the local rank in the shared memory communicator
Synopsis
#include "petscsys.h"
PetscErrorCode PetscShmCommGlobalToLocal(PetscShmComm pshmcomm,PetscMPIInt grank,PetscMPIInt *lrank)
Input Parameters
| pshmcomm | - the shared memory communicator object
|
| grank | - the global rank
|
Output Parameter
lrank -the local rank, or MPI_PROC_NULL if it does not exist
Developer Notes
Assumes the pshmcomm->globranks[] is sorted
It may be better to rewrite this to map multiple global ranks to local in the same function call
Level
developer
Location
src/sys/utils/mpishm.c
Index of all Sys routines
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