f13ea32830
components to use. This code was rendered obsolete (albiet harmless) by the MCA base improvements that only open the components that were specified by each framework's MCA parameter. This commit was SVN r20176.
203 строки
6.9 KiB
C
203 строки
6.9 KiB
C
/*
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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) 2004-2005 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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* $COPYRIGHT$
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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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*/
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/** @file
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* MCA coll base framework public interface functions.
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*
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* These functions are normally invoked by the back-ends of:
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*
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* - The back-ends of MPI_Init() and MPI_Finalize()
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* - Communuicactor constructors (e.g., MPI_Comm_split()) and
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* destructors (e.g., MPI_Comm_free())
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* - The laminfo command
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*/
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#ifndef MCA_COLL_BASE_H
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#define MCA_COLL_BASE_H
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#include "ompi_config.h"
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#include "mpi.h"
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#include "opal/class/opal_list.h"
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#include "ompi/mca/coll/coll.h"
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/*
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* Global functions for MCA overall collective open and close
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*/
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BEGIN_C_DECLS
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/**
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* Initialize the coll MCA framework
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*
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* @retval OMPI_SUCCESS Upon success
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* @retval OMPI_ERROR Upon failure
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*
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* This must be the first function invoked in the coll MCA
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* framework. It initializes the coll MCA framework, finds and
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* opens coll components, etc.
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*
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* This function is invoked during ompi_mpi_init() and during the
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* initialization of the special case of the laminfo command.
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*
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* This function fills in the internal global variable
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* mca_coll_base_components_opened, which is a list of all coll components
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* that were successfully opened. This variable should \em only be
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* used by other coll base functions -- it is not considered a
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* public interface member -- and is only mentioned here for
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* completeness.
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*/
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OMPI_DECLSPEC int mca_coll_base_open(void);
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/**
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* Create list of available coll components.
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*
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* @param allow_multi_user_threads Will be set to true if any of the
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* available components will allow multiple user threads
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* @param have_hidden_threads Will be set to true if any of the
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* available components have hidden threads.
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*
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* @retval OMPI_SUCCESS If one or more coll components are available.
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* @retval OMPI_ERROR If no coll components are found to be available.
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*
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* This function is invoked during ompi_mpi_init() to query all
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* successfully opened coll components and create a list of all
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* available coll components.
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*
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* This function traverses the (internal global variable)
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* mca_coll_base_components_opened list and queries each component to see
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* if it ever might want to run during this MPI process. It creates
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* another internal global variable list named
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* mca_coll_base_components_available, consisting of a list of components
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* that are available for selection when communicators are created.
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* This variable should \em only be used by other coll base
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* functions -- it is not considered a public interface member --
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* and is only mentioned here for completeness.
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*/
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int mca_coll_base_find_available(bool enable_progress_threads,
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bool enable_mpi_threads);
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/**
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* Select an available component for a new communicator.
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*
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* @param comm Communicator that the component will be selected for.
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* @param preferred The component that is preferred for this
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* communicator (or NULL).
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*
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* @return OMPI_SUCCESS Upon success.
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* @return OMPI_ERROR Upon failure.
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*
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* Note that the types of the parameters have "struct" in them
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* (e.g., ompi_communicator_t" vs. a plain "ompi_communicator_t") to
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* avoid an include file loop. All similar types (e.g., "struct
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* ompi_communicator_t *", "ompi_communicator_t *", and "MPI_Comm")
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* are all typedef'ed to be the same, so the fact that we use struct
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* here in the prototype is ok.
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*
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* This function is invoked when a new communicator is created and a
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* coll component needs to be selected for it. It should be invoked
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* near the end of the communicator creation process such that
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* almost everything else is functional on the communicator (e.g.,
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* point-to-point communication).
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*
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* Note that new communicators may be created as a result of
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* invoking this function. Specifically: this function is called in
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* the depths of communicator creation, but during the execution of
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* this function, new communicators may be created, and therefore
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* communicator creation functions may be re-entered (albiet with
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* different arguments).
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*/
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int mca_coll_base_comm_select(struct ompi_communicator_t *comm);
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/**
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* Finalize a coll component on a specific communicator.
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*
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* @param comm The communicator that is being destroyed.
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*
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* @retval OMPI_SUCCESS Always.
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*
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* Note that the type of the parameter is only a "struct
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* ompi_communicator_t" (vs. a plain "ompi_communicator_t") to avoid
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* an include file loop. The types "struct ompi_communicator_t *",
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* "ompi_communicator_t *", and "MPI_Comm" are all typedef'ed to be
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* the same, so the fact that we use struct here in the prototype is
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* ok.
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*
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* This function is invoked near the beginning of the destruction of
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* a communicator. It finalizes the coll component associated with the
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* communicator (e.g., allowing the component to clean up and free any
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* resources allocated for that communicator). Note that similar to
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* mca_coll_base_select(), as result of this function, other
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* communicators may also be destroyed.
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*/
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int mca_coll_base_comm_unselect(struct ompi_communicator_t *comm);
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/**
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* Shut down the coll MCA framework.
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*
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* @retval OMPI_SUCCESS Always
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*
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* This function shuts down everything in the coll MCA framework,
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* and is called during ompi_mpi_finalize() and the special case of
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* the laminfo command.
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*
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* It must be the last function invoked on the coll MCA framework.
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*/
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OMPI_DECLSPEC int mca_coll_base_close(void);
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/*
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* Globals
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*/
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/**
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* Coll framework debugging stream ID used with opal_output() and
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* opal_output_verbose().
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*/
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OMPI_DECLSPEC extern int mca_coll_base_output;
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/**
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* Indicator as to whether the list of opened coll components is valid or
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* not.
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*/
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extern bool mca_coll_base_components_opened_valid;
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/**
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* List of all opened components; created when the coll framework is
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* initialized and destroyed when we reduce the list to all available
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* coll components.
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*/
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OMPI_DECLSPEC extern opal_list_t mca_coll_base_components_opened;
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/**
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* Indicator as to whether the list of available coll components is valid
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* or not.
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*/
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extern bool mca_coll_base_components_available_valid;
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/**
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* List of all available components; created by reducing the list of open
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* components to all those who indicate that they may run during this
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* process.
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*/
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extern opal_list_t mca_coll_base_components_available;
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END_C_DECLS
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#endif /* MCA_BASE_COLL_H */
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