MPI_Lookup_name - Finds port associated with a service name
#include <mpi.h>
int MPI_Lookup_name(const char *service_name, MPI_Info info,
char *port_name)
USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_LOOKUP_NAME(SERVICE_NAME, INFO, PORT_NAME, IERROR)
CHARACTER*(*) SERVICE_NAME, PORT_NAME
INTEGER INFO, IERROR
USE mpi_f08
MPI_Lookup_name(service_name, info, port_name, ierror)
CHARACTER(LEN=*), INTENT(IN) :: service_name
TYPE(MPI_Info), INTENT(IN) :: info
CHARACTER(LEN=MPI_MAX_PORT_NAME), INTENT(OUT) :: port_name
INTEGER, OPTIONAL, INTENT(OUT) :: ierror
service_name
: A service name (string).info
: Options to the name service functions (handle).
port_name
: a port name (string).ierror
: Fortran only: Error status (integer).
This function retrieves a port_name published under service_name by a previous invocation of MPI_Publish_name
. The application must supply a port_name buffer large enough to hold the largest possible port name (i.e., MPI_MAX_PORT_NAME bytes).
The following keys for info are recognized:
Key Type Description
--- ---- -----------
ompi_lookup_order char * Resolution order for name lookup.
The ompi_lookup_order info key can specify one of four valid string values (see the NAME SCOPE section below for more information on name scopes):
local: Only search the local scope for name resolution.
global: Only search the global scope for name resolution.
- local,global: Search the local scope for name resolution. If
not found, try searching the global scope for name resolution. This behavior is the default if the ompi_lookup_order info key is not specified.
- global,local: Search the global scope for name resolution. If
not found, try searching the local scope for name resolution.
If no info key is provided, the search will first check to see if a global server has been specified and is available. If so, then the search will default to global scope first, followed by local. Otherwise, the search will default to local.
Open MPI supports two name scopes: global and local. Local scope values are placed in a data store located on the mpirun of the calling process' job, while global scope values reside on a central server. Calls to MPI_Unpublish_name
must correctly specify the scope to be used in finding the value to be removed. The function will return an error if the specified service name is not found on the indicated location.
For a more detailed description of scoping rules, please see the MPI_Publish_name
man page.
* MPI_Publish_name
* MPI_Open_port