SHMEM_PE_ACCESSIBLE(3)SHMEM_PE_ACCESSIBLE(3)NAMEshmem_pe_accessible - Determines whether a processing element (PE) is
accessible via SHMEM data transfer operations
SYNOPSIS
C:
#include <mpp/shmem.h>
int shmem_pe_accessible(int pe);
Fortran:
#include <mpp/shmem.fh>
LOGICAL LOG, SHMEM_PE_ACCESSIBLE
INTEGER pe
LOG = SHMEM_PE_ACCESSIBLE(pe)DESCRIPTIONshmem_pe_accessible is a query function that indicates whether a
specified PE is accessible via SHMEM from the local PE.
On IRIX systems, this function is needed when a message-passing
application using both MPI and SHMEM is distributed over a cluster.
In these cases, SHMEM communication is available only for PEs residing
on the same host as the local PE.
On SGI Altix 3000 series systems, SHMEM is supported across multiple
partitioned hosts. In this case, SHMEM communication is available for
PEs residing on the same or different partitions from the local PE.
When running multiple executable MPI applications using SHMEM on
Altix, full SHMEM support is available between processes running from
the same executable file. However, SHMEM support between processes of
different executable files is supported only for data objects on the
symmetric heap, since static data objects are not symmetric between
different executable files. The shmem_pe_accessible function on Altix
returns TRUE only if the remote PE is a process running from the same
executable file as the local PE, indicating that full SHMEM support
(static memory and symmetric heap) is available.
RETURN VALUES
C: The return value is 1 if the specified PE is a valid remote
PE for SHMEM functions; otherwise,it is 0.
Fortran: The return value is .TRUE. if the specified PE is a valid
remote PE for SHMEM functions; otherwise, it is .FALSE..
SEE ALSOintro_shmem(3), shmem_addr_accessible(3)
