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MPI(3)				   Open	MPI				MPI(3)

       MPI - General information Open MPI 1.10.6.

       Open  MPI  is an	open source implementation of MPI (message-passing in-
       terface), the industry-standard specification for writing message-pass-
       ing  programs.  Message	passing	 is a programming model	that gives the
       programmer explicit control over	interprocess communication.

       The MPI specification was developed by the MPI Forum, a group of	 soft-
       ware  developers, computer vendors, academics, and computer-science re-
       searchers whose goal was	to develop a  standard	for  writing  message-
       passing programs	that would be efficient, flexible, and portable.

       The  outcome,  known  as	the MPI	Standard, was first published in 1993;
       its most	recent version (MPI-2) was published in	July  1997.  Open  MPI
       1.2 includes all	MPI 1.2-compliant and MPI 2-compliant routines.

       For more	information about Open MPI, see	the following URL:

       The MPI standards are available at the following	URL:

       Man pages for Open MPI and Open MPI I/O routines	are named according to
       C syntax, that is, they begin with the prefix "MPI_", all in uppercase,
       and the first letter following the "MPI_" prefix	is also	uppercase. The
       rest of the letters in the routine  are	all  lowercase,	 for  example,

       To fine-tune your Open MPI environment, you can either use arguments to
       the mpirun, orterun, or mpiexec commands, or you	can  use  MCA  parame-

       For more	information on arguments, see the orterun.1 man	page.

       For  a complete listing of MCA parameters and their descriptions, issue
       the command ompi_info -h	or ompi_info -param all	all. This  information
       also appears in the FAQ on the Open MPI web site	at:

       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; the pre-
       defined error handler MPI_ERRORS_RETURN may be used to cause error val-
       ues  to be returned.  Note that MPI does	not guarantee that an MPI pro-
       gram can	continue past an error.

       For more	information on Open MPI	error codes, see mpi.h in the  include

       Standard	error return classes for Open MPI:

       MPI_SUCCESS		0      Successful return code.
       MPI_ERR_BUFFER		1      Invalid buffer pointer.
       MPI_ERR_COUNT		2      Invalid count argument.
       MPI_ERR_TYPE		3      Invalid datatype	argument.
       MPI_ERR_TAG		4      Invalid tag argument.
       MPI_ERR_COMM		5      Invalid communicator.

       MPI_ERR_RANK		6      Invalid rank.
       MPI_ERR_REQUEST		7      Invalid MPI_Request handle.
       MPI_ERR_ROOT		7      Invalid root.
       MPI_ERR_GROUP		8      Null group passed to function.
       MPI_ERR_OP		9      Invalid operation.
       MPI_ERR_TOPOLOGY	       10      Invalid topology.

       MPI_ERR_DIMS	       11      Illegal dimension argument.
       MPI_ERR_ARG	       12      Invalid argument.
       MPI_ERR_UNKNOWN	       13      Unknown error.
       MPI_ERR_TRUNCATE	       14      Message truncated on receive.
       MPI_ERR_OTHER	       15      Other error; use	Error_string.

       MPI_ERR_INTERN	       16      Internal	error code.
       MPI_ERR_IN_STATUS       17      Look in status for error	value.
       MPI_ERR_PENDING	       18      Pending request.
       MPI_ERR_ACCESS	       19      Permission denied.
       MPI_ERR_AMODE	       20      Unsupported amode passed	to open.

       MPI_ERR_ASSERT	       21      Invalid assert.
       MPI_ERR_BAD_FILE	       22      Invalid file name (for example,
				       path name too long).
       MPI_ERR_BASE	       23      Invalid base.
       MPI_ERR_CONVERSION      24      An error	occurred in a user-supplied
				       data-conversion function.
       MPI_ERR_DISP	       25      Invalid displacement.

       MPI_ERR_DUP_DATAREP     26      Conversion functions could not
				       be registered because a data
				       representation identifier that was
				       already defined was passed to
       MPI_ERR_FILE_EXISTS     27      File exists.
       MPI_ERR_FILE_IN_USE     28      File operation could not	be
				       completed, as the file is currently
				       open by some process.
       MPI_ERR_FILE	       29
       MPI_ERR_INFO_KEY	       30      Illegal info key.

       MPI_ERR_INFO_NOKEY      31      No such key.
       MPI_ERR_INFO_VALUE      32      Illegal info value.
       MPI_ERR_INFO	       33      Invalid info object.
       MPI_ERR_IO	       34      I/O error.
       MPI_ERR_KEYVAL	       35      Illegal key value.

       MPI_ERR_LOCKTYPE	       36      Invalid locktype.
       MPI_ERR_NAME	       37      Name not	found.
       MPI_ERR_NO_MEM	       38      Memory exhausted.
       MPI_ERR_NOT_SAME	       39
       MPI_ERR_NO_SPACE	       40      Not enough space.

       MPI_ERR_NO_SUCH_FILE    41      File (or	directory) does	not exist.
       MPI_ERR_PORT	       42      Invalid port.
       MPI_ERR_QUOTA	       43      Quota exceeded.
       MPI_ERR_READ_ONLY       44      Read-only file system.
       MPI_ERR_RMA_CONFLICT    45      Conflicting accesses to window.

       MPI_ERR_RMA_SYNC	       46      Erroneous RMA synchronization.
       MPI_ERR_SERVICE	       47      Invalid publish/unpublish.
       MPI_ERR_SIZE	       48      Invalid size.
       MPI_ERR_SPAWN	       49      Error spawning.
			       50      Unsupported datarep passed to

			       51      Unsupported operation, such as
				       seeking on a file that supports
				       only sequential access.
       MPI_ERR_WIN	       52      Invalid window.
       MPI_ERR_LASTCODE	       53      Last error code.

       MPI_ERR_SYSRESOURCE     -2      Out of resources

1.10.6				 Feb 17, 2017				MPI(3)


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