5fae72b9aa
This patch reshape the way we deal with topologies completely. Where our topologies were mainly storage components (they were not capable of creating the new communicator), the new version is built around a [possibly] common representation (in mca/topo/topo.h), but the functions to attach and retrieve the topological information are specific to each component. As a result the ompi_create_cart and ompi_create_graph functions become useless and have been removed. In addition to adding the internal infrastructure to manage the topology information, it updates the MPI interface, and the debuggers support and provides all Fortran interfaces. This commit was SVN r28687.
559 строки
21 KiB
C
559 строки
21 KiB
C
/* -*- Mode: C; c-basic-offset:4 ; -*- */
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/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2013 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* Copyright (c) 2006-2012 Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2006-2010 University of Houston. All rights reserved.
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* Copyright (c) 2009 Sun Microsystems, Inc. All rights reserved.
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* Copyright (c) 2011-2013 INRIA. All rights reserved.
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* Copyright (c) 2011-2013 Universite Bordeaux 1
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#ifndef OMPI_COMMUNICATOR_H
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#define OMPI_COMMUNICATOR_H
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#include "ompi_config.h"
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#include "opal/class/opal_object.h"
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#include "ompi/errhandler/errhandler.h"
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#include "opal/threads/mutex.h"
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#include "mpi.h"
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#include "ompi/group/group.h"
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#include "ompi/mca/coll/coll.h"
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#include "ompi/proc/proc.h"
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BEGIN_C_DECLS
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OMPI_DECLSPEC OBJ_CLASS_DECLARATION(ompi_communicator_t);
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#define OMPI_COMM_INTER 0x00000001
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#define OMPI_COMM_NAMEISSET 0x00000002
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#define OMPI_COMM_INTRINSIC 0x00000004
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#define OMPI_COMM_DYNAMIC 0x00000008
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#define OMPI_COMM_ISFREED 0x00000010
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#define OMPI_COMM_INVALID 0x00000020
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#define OMPI_COMM_CART 0x00000100
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#define OMPI_COMM_GRAPH 0x00000200
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#define OMPI_COMM_DIST_GRAPH 0x00000400
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#define OMPI_COMM_PML_ADDED 0x00001000
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#define OMPI_COMM_EXTRA_RETAIN 0x00004000
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/* some utility #defines */
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#define OMPI_COMM_IS_INTER(comm) ((comm)->c_flags & OMPI_COMM_INTER)
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#define OMPI_COMM_IS_INTRA(comm) (!((comm)->c_flags & OMPI_COMM_INTER))
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#define OMPI_COMM_IS_CART(comm) ((comm)->c_flags & OMPI_COMM_CART)
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#define OMPI_COMM_IS_GRAPH(comm) ((comm)->c_flags & OMPI_COMM_GRAPH)
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#define OMPI_COMM_IS_DIST_GRAPH(comm) ((comm)->c_flags & OMPI_COMM_DIST_GRAPH)
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#define OMPI_COMM_IS_INTRINSIC(comm) ((comm)->c_flags & OMPI_COMM_INTRINSIC)
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#define OMPI_COMM_IS_FREED(comm) ((comm)->c_flags & OMPI_COMM_ISFREED)
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#define OMPI_COMM_IS_DYNAMIC(comm) ((comm)->c_flags & OMPI_COMM_DYNAMIC)
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#define OMPI_COMM_IS_INVALID(comm) ((comm)->c_flags & OMPI_COMM_INVALID)
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#define OMPI_COMM_IS_PML_ADDED(comm) ((comm)->c_flags & OMPI_COMM_PML_ADDED)
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#define OMPI_COMM_IS_EXTRA_RETAIN(comm) ((comm)->c_flags & OMPI_COMM_EXTRA_RETAIN)
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#define OMPI_COMM_SET_DYNAMIC(comm) ((comm)->c_flags |= OMPI_COMM_DYNAMIC)
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#define OMPI_COMM_SET_INVALID(comm) ((comm)->c_flags |= OMPI_COMM_INVALID)
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#define OMPI_COMM_SET_PML_ADDED(comm) ((comm)->c_flags |= OMPI_COMM_PML_ADDED)
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#define OMPI_COMM_SET_EXTRA_RETAIN(comm) ((comm)->c_flags |= OMPI_COMM_EXTRA_RETAIN)
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/* a set of special tags: */
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/* to recognize an MPI_Comm_join in the comm_connect_accept routine. */
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#define OMPI_COMM_ALLGATHER_TAG -31078
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#define OMPI_COMM_BARRIER_TAG -31079
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#define OMPI_COMM_ALLREDUCE_TAG -31080
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/**
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* Modes required for acquiring the new comm-id.
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* The first (INTER/INTRA) indicates whether the
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* input comm was an inter/intra-comm, the second
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* whether the new communicator will be an inter/intra
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* comm
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*/
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#define OMPI_COMM_CID_INTRA 0x00000020
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#define OMPI_COMM_CID_INTER 0x00000040
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#define OMPI_COMM_CID_INTRA_BRIDGE 0x00000080
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#define OMPI_COMM_CID_INTRA_OOB 0x00000100
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/**
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* The block of CIDs allocated for MPI_COMM_WORLD
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* and other communicators
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*/
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#define OMPI_COMM_BLOCK_WORLD 16
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#define OMPI_COMM_BLOCK_OTHERS 8
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/* A macro comparing two CIDs */
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#define OMPI_COMM_CID_IS_LOWER(comm1,comm2) ( ((comm1)->c_contextid < (comm2)->c_contextid)? 1:0)
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OMPI_DECLSPEC extern opal_pointer_array_t ompi_mpi_communicators;
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struct ompi_communicator_t {
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opal_object_t c_base;
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opal_mutex_t c_lock; /* mutex for name and potentially
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attributes */
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char c_name[MPI_MAX_OBJECT_NAME];
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uint32_t c_contextid;
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int c_my_rank;
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uint32_t c_flags; /* flags, e.g. intercomm,
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topology, etc. */
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int c_id_available; /* the currently available Cid for allocation
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to a child*/
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int c_id_start_index; /* the starting index of the block of cids
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allocated to this communicator*/
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ompi_group_t *c_local_group;
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ompi_group_t *c_remote_group;
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struct ompi_communicator_t *c_local_comm; /* a duplicate of the
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local communicator in
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case the comm is an
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inter-comm*/
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/* Attributes */
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struct opal_hash_table_t *c_keyhash;
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/**< inscribing cube dimension */
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int c_cube_dim;
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/* Standard information about the selected topology module (or NULL
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if this is not a cart, graph or dist graph communicator) */
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struct mca_topo_base_module_t* c_topo;
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/* index in Fortran <-> C translation array */
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int c_f_to_c_index;
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#ifdef OMPI_WANT_PERUSE
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/*
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* Place holder for the PERUSE events.
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*/
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struct ompi_peruse_handle_t** c_peruse_handles;
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#endif
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/* Error handling. This field does not have the "c_" prefix so
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that the OMPI_ERRHDL_* macros can find it, regardless of whether
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it's a comm, window, or file. */
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ompi_errhandler_t *error_handler;
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ompi_errhandler_type_t errhandler_type;
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/* Hooks for PML to hang things */
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struct mca_pml_comm_t *c_pml_comm;
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/* Collectives module interface and data */
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mca_coll_base_comm_coll_t c_coll;
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};
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typedef struct ompi_communicator_t ompi_communicator_t;
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/**
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* Padded struct to maintain back compatibiltiy.
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*
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* The following ompi_predefined_xxx_t structure is used to maintain
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* backwards binary compatibility for MPI applications compiled
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* against one version of OMPI library but dynamically linked at
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* runtime with another. The issue is between versions the actual
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* structure may change in size (even between debug and optimized
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* compilation -- the structure contents change, and therefore the
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* overall size changes).
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*
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* This is problematic with predefined handles because the storage of
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* the structure ends up being located to an application's BSS. This
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* causes problems because if one version has the predefined as size X
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* and then the application is dynamically linked with a version that
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* has a size of Y (where X != Y) then the application will
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* unintentionally overrun the memory initially allocated for the
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* structure.
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*
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* The solution we are using below creates a parent structure
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* (ompi_predefined_xxx_t) that contains the base structure
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* (ompi_xxx_t) followed by a character padding that is the size of
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* the total size we choose to preallocate for the structure minus the
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* amount used by the base structure. In this way, we've normalized
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* the size of each predefined handle across multiple versions and
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* configurations of Open MPI (e.g., MPI_COMM_WORLD will refer to a
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* back-end struct that is X bytes long, even if we change the
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* back-end ompi_communicator_t between version A.B and version C.D in
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* Open MPI). When we come close to filling up the the padding we can
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* add a pointer at the back end of the base structure to point to an
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* extension of the type. Or we can just increase the padding and
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* break backwards binary compatibility.
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*
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* The above method was decided after several failed attempts
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* described below.
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*
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* - Original implementation - suffered that the base structure seemed
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* to always change in size between Open MPI versions and/or
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* configurations (e.g., optimized vs. debugging build).
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*
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* - Convert all predefined handles to run-time-assigned pointers
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* (i.e., global variables) - This worked except in cases where an MPI
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* application wanted to assign the predefined handle value to a
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* global variable -- we could not guarantee to have the global
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* variable filled until MPI_INIT was called (recall that MPI
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* predefined handles must be assignable before MPI_INIT; e.g.,
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* "MPI_Comm foo = MPI_COMM_WORLD").
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*
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* - union of struct and padding - Similar to current implementation
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* except using a union for the parent. This worked except in cases
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* where the compilers did not support C99 union static initalizers.
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* It would have been a pain to convert a bunch of the code to use
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* non-static initializers (e.g., MPI datatypes).
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*/
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/* Define for the preallocated size of the predefined handle.
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* Note that we are using a pointer type as the base memory chunk
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* size so when the bitness changes the size of the handle changes.
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* This is done so we don't end up needing a structure that is
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* incredibly larger than necessary because of the bitness.
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*/
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#define PREDEFINED_COMMUNICATOR_PAD (sizeof(void*) * 128)
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struct ompi_predefined_communicator_t {
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struct ompi_communicator_t comm;
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char padding[PREDEFINED_COMMUNICATOR_PAD - sizeof(ompi_communicator_t)];
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};
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typedef struct ompi_predefined_communicator_t ompi_predefined_communicator_t;
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OMPI_DECLSPEC extern ompi_communicator_t *ompi_mpi_comm_parent;
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OMPI_DECLSPEC extern ompi_predefined_communicator_t ompi_mpi_comm_world;
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OMPI_DECLSPEC extern ompi_predefined_communicator_t ompi_mpi_comm_self;
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OMPI_DECLSPEC extern ompi_predefined_communicator_t ompi_mpi_comm_null;
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/*
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* These variables are for the MPI F03 bindings (F03 must bind Fortran
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* varaiables to symbols; it cannot bind Fortran variables to the
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* address of a C variable).
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*/
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OMPI_DECLSPEC extern ompi_predefined_communicator_t *ompi_mpi_comm_world_addr;
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OMPI_DECLSPEC extern ompi_predefined_communicator_t *ompi_mpi_comm_self_addr;
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OMPI_DECLSPEC extern ompi_predefined_communicator_t *ompi_mpi_comm_null_addr;
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/**
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* Is this a valid communicator? This is a complicated question.
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* :-)
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*
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* According to MPI-1:5.2.4 (p137):
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*
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* "The predefined constant MPI_COMM_NULL is the value used for
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* invalid communicator handles."
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*
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* Hence, MPI_COMM_NULL is not valid. However, MPI-2:4.12.4 (p50)
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* clearly states that the MPI_*_C2F and MPI_*_F2C functions
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* should treat MPI_COMM_NULL as a valid communicator -- it
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* distinctly differentiates between "invalid" handles and
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* "MPI_*_NULL" handles. Some feel that the MPI-1 definition
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* still holds for all other MPI functions; others feel that the
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* MPi-2 definitions trump the MPI-1 definition. Regardless of
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* who is right, there is ambiguity here. So we have left
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* ompi_comm_invalid() as originally coded -- per the MPI-1
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* definition, where MPI_COMM_NULL is an invalid communicator.
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* The MPI_Comm_c2f() function, therefore, calls
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* ompi_comm_invalid() but also explictily checks to see if the
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* handle is MPI_COMM_NULL.
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*/
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static inline int ompi_comm_invalid(ompi_communicator_t* comm)
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{
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if ((NULL == comm) || (MPI_COMM_NULL == comm) ||
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(OMPI_COMM_IS_FREED(comm)) || (OMPI_COMM_IS_INVALID(comm)) )
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return true;
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else
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return false;
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}
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/**
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* rank w/in the communicator
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*/
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static inline int ompi_comm_rank(ompi_communicator_t* comm)
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{
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return comm->c_my_rank;
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}
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/**
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* size of the communicator
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*/
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static inline int ompi_comm_size(ompi_communicator_t* comm)
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{
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return comm->c_local_group->grp_proc_count;
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}
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/**
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* size of the remote group for inter-communicators.
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* returns zero for an intra-communicator
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*/
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static inline int ompi_comm_remote_size(ompi_communicator_t* comm)
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{
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return (comm->c_flags & OMPI_COMM_INTER ? comm->c_remote_group->grp_proc_count : 0);
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}
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/**
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* Context ID for the communicator, suitable for passing to
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* ompi_comm_lookup for getting the communicator back
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*/
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static inline uint32_t ompi_comm_get_cid(ompi_communicator_t* comm)
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{
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return comm->c_contextid;
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}
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/* return pointer to communicator associated with context id cid,
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* No error checking is done*/
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static inline ompi_communicator_t *ompi_comm_lookup(uint32_t cid)
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{
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/* array of pointers to communicators, indexed by context ID */
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return (ompi_communicator_t*)opal_pointer_array_get_item(&ompi_mpi_communicators, cid);
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}
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static inline struct ompi_proc_t* ompi_comm_peer_lookup(ompi_communicator_t* comm, int peer_id)
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{
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#if OPAL_ENABLE_DEBUG
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if(peer_id >= comm->c_remote_group->grp_proc_count) {
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opal_output(0, "ompi_comm_peer_lookup: invalid peer index (%d)", peer_id);
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return (struct ompi_proc_t *) NULL;
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}
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#endif
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/*return comm->c_remote_group->grp_proc_pointers[peer_id];*/
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return ompi_group_peer_lookup(comm->c_remote_group,peer_id);
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}
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static inline bool ompi_comm_peer_invalid(ompi_communicator_t* comm, int peer_id)
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{
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if(peer_id < 0 || peer_id >= comm->c_remote_group->grp_proc_count) {
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return true;
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}
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return false;
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}
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/**
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* Initialise MPI_COMM_WORLD and MPI_COMM_SELF
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*/
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int ompi_comm_init(void);
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OMPI_DECLSPEC int ompi_comm_link_function(void);
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/**
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* extract the local group from a communicator
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*/
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OMPI_DECLSPEC int ompi_comm_group (ompi_communicator_t *comm, ompi_group_t **group);
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/**
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* create a communicator based on a group
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*/
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int ompi_comm_create (ompi_communicator_t* comm, ompi_group_t *group,
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ompi_communicator_t** newcomm);
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/**
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* Take an almost complete communicator and reserve the CID as well
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* as activate it (initialize the collective and the topologies).
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*/
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int ompi_comm_enable(ompi_communicator_t *old_comm,
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ompi_communicator_t *new_comm,
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int new_rank,
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int num_procs,
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ompi_proc_t** topo_procs);
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/**
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* Back end of MPI_DIST_GRAPH_CREATE_ADJACENT
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*/
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int ompi_topo_dist_graph_create_adjacent(ompi_communicator_t *old_comm,
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int indegree, int sources[],
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int sourceweights[], int outdegree,
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int destinations[], int destweights[],
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MPI_Info info, int reorder,
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MPI_Comm *comm_dist_graph);
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/**
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* split a communicator based on color and key. Parameters
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* are identical to the MPI-counterpart of the function.
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*
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* @param comm: input communicator
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* @param color
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* @param key
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*
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* @
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*/
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OMPI_DECLSPEC int ompi_comm_split (ompi_communicator_t *comm, int color, int key,
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ompi_communicator_t** newcomm, bool pass_on_topo);
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/**
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* split a communicator based on type and key. Parameters
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* are identical to the MPI-counterpart of the function.
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*
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* @param comm: input communicator
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* @param color
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* @param key
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*
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* @
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*/
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OMPI_DECLSPEC int ompi_comm_split_type(ompi_communicator_t *comm,
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int split_type, int key,
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struct ompi_info_t *info,
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ompi_communicator_t** newcomm);
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/**
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* dup a communicator. Parameter are identical to the MPI-counterpart
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* of the function. It has been extracted, since we need to be able
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* to dup a communicator internally as well.
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*
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* @param comm: input communicator
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* @param newcomm: the new communicator or MPI_COMM_NULL if any error is detected.
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*/
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OMPI_DECLSPEC int ompi_comm_dup (ompi_communicator_t *comm, ompi_communicator_t **newcomm);
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/**
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* compare two communicators.
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*
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* @param comm1,comm2: input communicators
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*
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*/
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int ompi_comm_compare(ompi_communicator_t *comm1, ompi_communicator_t *comm2, int *result);
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/**
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* free a communicator
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*/
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OMPI_DECLSPEC int ompi_comm_free (ompi_communicator_t **comm);
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/**
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* allocate a new communicator structure
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* @param local_group_size
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* @param remote_group_size
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*
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* This routine allocates the structure, the according local and
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* remote groups, the proc-arrays in the local and remote group.
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* It furthermore sets the fortran index correctly,
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* and sets all other elements to zero.
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*/
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ompi_communicator_t* ompi_comm_allocate (int local_group_size,
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int remote_group_size);
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/**
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* allocate new communicator ID
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* @param newcomm: pointer to the new communicator
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* @param oldcomm: original comm
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* @param bridgecomm: bridge comm for intercomm_create
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* @param mode: combination of input
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* OMPI_COMM_CID_INTRA: intra-comm
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* OMPI_COMM_CID_INTER: inter-comm
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* OMPI_COMM_CID_INTRA_BRIDGE: 2 intracomms connected by
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* a bridge comm. local_leader
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* and remote leader are in this
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* case an int (rank in bridge-comm).
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* OMPI_COMM_CID_INTRA_OOB: 2 intracomms, leaders talk
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* through OOB. lleader and rleader
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* are the required contact information.
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* @param send_first: to avoid a potential deadlock for
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* the OOB version.
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* This routine has to be thread safe in the final version.
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*/
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OMPI_DECLSPEC int ompi_comm_nextcid ( ompi_communicator_t* newcomm,
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ompi_communicator_t* oldcomm,
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ompi_communicator_t* bridgecomm,
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void* local_leader,
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void* remote_leader,
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int mode,
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int send_first);
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/**
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* shut down the communicator infrastructure.
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*/
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int ompi_comm_finalize (void);
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/**
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* This is THE routine, where all the communicator stuff
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* is really set.
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*/
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OMPI_DECLSPEC int ompi_comm_set ( ompi_communicator_t** newcomm,
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ompi_communicator_t* oldcomm,
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int local_size,
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int *local_ranks,
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int remote_size,
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int *remote_ranks,
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opal_hash_table_t *attr,
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ompi_errhandler_t *errh,
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bool copy_topocomponent,
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ompi_group_t *local_group,
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ompi_group_t *remote_group );
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/**
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* This is a short-hand routine used in intercomm_create.
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* The routine makes sure, that all processes have afterwards
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* a list of ompi_proc_t pointers for the remote group.
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*/
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struct ompi_proc_t **ompi_comm_get_rprocs ( ompi_communicator_t *local_comm,
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ompi_communicator_t *bridge_comm,
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int local_leader,
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int remote_leader,
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int tag,
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int rsize);
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/**
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* This routine verifies, whether local_group and remote group are overlapping
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* in intercomm_create
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*/
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int ompi_comm_overlapping_groups (int size, struct ompi_proc_t ** lprocs,
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int rsize, struct ompi_proc_t ** rprocs);
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/**
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* This is a routine determining whether the local or the
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* remote group will be first in the new intra-comm.
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* Just used from within MPI_Intercomm_merge.
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*/
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int ompi_comm_determine_first ( ompi_communicator_t *intercomm,
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int high );
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OMPI_DECLSPEC int ompi_comm_activate ( ompi_communicator_t** newcomm,
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ompi_communicator_t* comm,
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ompi_communicator_t* bridgecomm,
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void* local_leader,
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void* remote_leader,
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int mode,
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|
int send_first );
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|
|
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/**
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* a simple function to dump the structure
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|
*/
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int ompi_comm_dump ( ompi_communicator_t *comm );
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/* setting name */
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int ompi_comm_set_name (ompi_communicator_t *comm, char *name );
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/*
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* these are the init and finalize functions for the comm_reg
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* stuff. These routines are necessary for handling multi-threading
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* scenarious in the communicator_cid allocation
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|
*/
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void ompi_comm_reg_init(void);
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void ompi_comm_reg_finalize(void);
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/* global variable to save the number od dynamic communicators */
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|
extern int ompi_comm_num_dyncomm;
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|
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/* check whether any of the processes has requested support for
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|
MPI_THREAD_MULTIPLE. Note, that this produces global
|
|
information across MPI_COMM_WORLD, in contrary to the local
|
|
flag ompi_mpi_thread_provided
|
|
*/
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|
OMPI_DECLSPEC int ompi_comm_cid_init ( void );
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|
|
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END_C_DECLS
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#endif /* OMPI_COMMUNICATOR_H */
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