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mpi_init_thread(3) [debian man page]

MPI_Init_thread(3)							MPI							MPI_Init_thread(3)

NAME
MPI_Init_thread - Initialize the MPI execution environment SYNOPSIS
int MPI_Init_thread( int *argc, char ***argv, int required, int *provided ) INPUT PARAMETERS
argc - Pointer to the number of arguments argv - Pointer to the argument vector required - Level of desired thread support OUTPUT PARAMETER
provided - Level of provided thread support COMMAND LINE ARGUMENTS
MPI specifies no command-line arguments but does allow an MPI implementation to make use of them. See MPI_INIT for a description of the command line arguments supported by MPI_INIT and MPI_INIT_THREAD . NOTES
The valid values for the level of thread support are: MPI_THREAD_SINGLE - Only one thread will execute. MPI_THREAD_FUNNELED - The process may be multi-threaded, but only the main thread will make MPI calls (all MPI calls are funneled to the main thread). MPI_THREAD_SERIALIZED - The process may be multi-threaded, and multiple threads may make MPI calls, but only one at a time: MPI calls are not made concur- rently from two distinct threads (all MPI calls are serialized). MPI_THREAD_MULTIPLE - Multiple threads may call MPI, with no restrictions. NOTES FOR FORTRAN
Note that the Fortran binding for this routine does not have the argc and argv arguments. ( MPI_INIT_THREAD(required, provided, ierror) ) ERRORS
All MPI routines (except MPI_Wtime and MPI_Wtick ) return an error value; C routines as the value of the function and Fortran routines in the last argument. Before the value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI job. The error handler may be changed with MPI_Comm_set_errhandler (for communicators), MPI_File_set_errhandler (for files), and MPI_Win_set_errhandler (for RMA windows). The MPI-1 routine MPI_Errhandler_set may be used but its use is deprecated. The predefined error handler MPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not guarentee that an MPI program can continue past an error; however, MPI implementations will attempt to continue whenever possible. MPI_SUCCESS - No error; MPI routine completed successfully. MPI_ERR_OTHER - Other error; use MPI_Error_string to get more information about this error code. SEE ALSO
MPI_Init, MPI_Finalize LOCATION
initthread.c 6/18/2011 MPI_Init_thread(3)

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MPI_Init(3)								MPI							       MPI_Init(3)

NAME
MPI_Init - Initialize the MPI execution environment SYNOPSIS
int MPI_Init( int *argc, char ***argv ) INPUT PARAMETERS
argc - Pointer to the number of arguments argv - Pointer to the argument vector THREAD AND SIGNAL SAFETY
This routine must be called by one thread only. That thread is called the main thread and must be the thread that calls MPI_Finalize . NOTES
The MPI standard does not say what a program can do before an MPI_INIT or after an MPI_FINALIZE . In the MPICH implementation, you should do as little as possible. In particular, avoid anything that changes the external state of the program, such as opening files, reading standard input or writing to standard output. NOTES FOR FORTRAN
The Fortran binding for MPI_Init has only the error return subroutine MPI_INIT( ierr ) integer ierr ERRORS
All MPI routines (except MPI_Wtime and MPI_Wtick ) return an error value; C routines as the value of the function and Fortran routines in the last argument. Before the value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI job. The error handler may be changed with MPI_Comm_set_errhandler (for communicators), MPI_File_set_errhandler (for files), and MPI_Win_set_errhandler (for RMA windows). The MPI-1 routine MPI_Errhandler_set may be used but its use is deprecated. The predefined error handler MPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not guarentee that an MPI program can continue past an error; however, MPI implementations will attempt to continue whenever possible. MPI_SUCCESS - No error; MPI routine completed successfully. MPI_ERR_OTHER - This error class is associated with an error code that indicates that an attempt was made to call MPI_INIT a second time. MPI_INIT may only be called once in a program. SEE ALSO
MPI_Init_thread, MPI_Finalize LOCATION
init.c 1/12/2011 MPI_Init(3)

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