Virtual MPI

This module contains the virtual MPI part of MALP. More...

Modules
	Internal use only
	Internal use only.
	Maps
	Maps related utilities.
	Partitions
	Partitions related utilities.
	Streams
	Stream related utilities.

Data Structures
struct	VMPI_Status
	Global status handling. More...

Macros
#define	VMPI_NG_ARBITRARY_VALUE   0x1234567llu
	Defines of magic values. More...
#define	VMPI_NG_MAXIMUM_TAGS   1000000
	Maximum number of tags allowed. More...
#define	MPI_COMM_UNIVERSE   ((MPI_Comm)VMPI_NG_ARBITRARY_VALUE)
	This value is used to refer to MPI_COMM_UNIVERSE from the host application. More...
#define	VMPI_PNAME_LEN   200
	Maximum size of a program name. More...
#define	VMPI_COMMAND_LEN   1024
	Maximum command line name. More...
#define	MACRO_MPI_Comm(_c)
	Macro used to wrap the MPI communicator. More...

Enumerations
enum	VMPI_Return_Status { VMPI_EAGAIN =-3, VMPI_ERROR =-2, VMPI_MEM =-1, VMPI_SUCCESS =0 }
	Enum for error handling. More...

Variables
struct VMPI_Status	__vmpi_status
	global VMPI status More...

Detailed Description

This module contains the virtual MPI part of MALP.

Virtual MPI consists of a set of functions allowing multiple MPI programs to work together (Streams, Mapping etc.).

To allow that, it also wrapps MPI calls in order to do some things before/after actual MPI calls (PMPI interface) . It does some initialization and release related to MALP and replaces the MPI communicator (MACRO_MPI_Comm).

The MPI functions are wrapped using the Wrapper

Macro Definition Documentation

#define MACRO_MPI_Comm

(

_c

)

Value:

{\
                                                                if (_c==MPI_COMM_WORLD)\
                                                                        _c=VMPI_Get_partition_comm();\
                                                                else if( _c==MPI_COMM_UNIVERSE)\
                                                                        _c=MPI_COMM_WORLD;\
                                                        }

Macro used to wrap the MPI communicator.

Parameters

_c	The requested communicator (must be a variable)

• if MPI_COMM_WORLD is requested, _c is changed to the current partition communicator (VMPI_Get_partition_comm()).
• if MPI_COMM_UNIVERSE is requested, _c is changed to MPI_COMM_WORLD.
• Not changed otherwise

Definition at line 32 of file VMPI_Wrap.h.

#define MPI_COMM_UNIVERSE   ((MPI_Comm)VMPI_NG_ARBITRARY_VALUE)

This value is used to refer to MPI_COMM_UNIVERSE from the host application.

Definition at line 48 of file VMPI.h.

#define VMPI_COMMAND_LEN   1024

Maximum command line name.

Definition at line 94 of file VMPI.h.

#define VMPI_NG_ARBITRARY_VALUE   0x1234567llu

Defines of magic values.

Definition at line 38 of file VMPI.h.

#define VMPI_NG_MAXIMUM_TAGS   1000000

Maximum number of tags allowed.

Definition at line 43 of file VMPI.h.

#define VMPI_PNAME_LEN   200

Maximum size of a program name.

Definition at line 89 of file VMPI.h.

Enumeration Type Documentation

enum VMPI_Return_Status

Enum for error handling.

Enumerator
VMPI_EAGAIN	The call cannot pursue retry.
VMPI_ERROR	Something went wrong.
VMPI_MEM	Failed to allocate some memory.
VMPI_SUCCESS	All OK.

Definition at line 54 of file VMPI.h.

Variable Documentation

struct VMPI_Status __vmpi_status

global VMPI status

Definition at line 30 of file VMPI.c.