552c9ca5a0
WHAT: Open our low-level communication infrastructure by moving all necessary components (btl/rcache/allocator/mpool) down in OPAL All the components required for inter-process communications are currently deeply integrated in the OMPI layer. Several groups/institutions have express interest in having a more generic communication infrastructure, without all the OMPI layer dependencies. This communication layer should be made available at a different software level, available to all layers in the Open MPI software stack. As an example, our ORTE layer could replace the current OOB and instead use the BTL directly, gaining access to more reactive network interfaces than TCP. Similarly, external software libraries could take advantage of our highly optimized AM (active message) communication layer for their own purpose. UTK with support from Sandia, developped a version of Open MPI where the entire communication infrastucture has been moved down to OPAL (btl/rcache/allocator/mpool). Most of the moved components have been updated to match the new schema, with few exceptions (mainly BTLs where I have no way of compiling/testing them). Thus, the completion of this RFC is tied to being able to completing this move for all BTLs. For this we need help from the rest of the Open MPI community, especially those supporting some of the BTLs. A non-exhaustive list of BTLs that qualify here is: mx, portals4, scif, udapl, ugni, usnic. This commit was SVN r32317.
138 строки
4.5 KiB
C
138 строки
4.5 KiB
C
/*
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* Copyright (c) 2013 Mellanox Technologies, Inc.
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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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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "oshmem_config.h"
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#include "opal/class/opal_list.h"
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#include "opal/mca/mca.h"
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#include "opal/mca/base/base.h"
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#include "opal/mca/base/mca_base_component_repository.h"
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#include "oshmem/util/oshmem_util.h"
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#include "oshmem/constants.h"
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#include "oshmem/mca/scoll/scoll.h"
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#include "oshmem/mca/scoll/base/base.h"
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/*
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* Private functions
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*/
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static int init_query(const mca_base_component_t * ls,
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bool enable_progress_threads,
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bool enable_threads);
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/*
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* Scan down the list of successfully opened components and query each of
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* them (the opened list will be one or more components. If the user
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* requested a specific component, it will be the only component in the
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* opened list). Create and populate the available list of all
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* components who indicate that they want to be considered for selection.
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* Close all components who do not want to be considered for selection,
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* and destroy the opened list.
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*
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* Also find the basic component while we're doing all of this, and save
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* it in a global variable so that we can find it easily later (e.g.,
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* during scope selection).
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*/
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int mca_scoll_base_find_available(bool enable_progress_threads,
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bool enable_threads)
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{
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mca_base_component_list_item_t *cli, *next;
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const mca_base_component_t *component;
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OPAL_LIST_FOREACH_SAFE(cli, next, &oshmem_scoll_base_framework.framework_components, mca_base_component_list_item_t) {
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component = cli->cli_component;
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/* Call a subroutine to do the work, because the component may
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represent different versions of the coll MCA. */
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if (OSHMEM_SUCCESS != init_query(component, enable_progress_threads,
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enable_threads)) {
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/* If the component doesn't want to run, then close it.
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Now close it out and release it from the DSO repository (if it's there). */
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opal_list_remove_item(&oshmem_scoll_base_framework.framework_components, &cli->super);
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mca_base_component_close(component, oshmem_scoll_base_framework.framework_output);
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OBJ_RELEASE(cli);
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}
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}
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/* If we have no collective components available, it's an error.
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Thanks for playing! */
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if (opal_list_get_size(&oshmem_scoll_base_framework.framework_components) == 0) {
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SCOLL_VERBOSE(10,
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"scoll:find_available: no components available!");
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return OSHMEM_ERROR;
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}
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/* All done */
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return OSHMEM_SUCCESS;
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}
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/*
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* Query a component, see if it wants to run at all. If it does, save
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* some information. If it doesn't, close it.
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*/
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static int init_query(const mca_base_component_t * component,
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bool enable_progress_threads,
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bool enable_threads)
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{
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int ret;
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SCOLL_VERBOSE(10,
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"scoll:find_available: querying scoll component %s",
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component->mca_component_name);
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/* This component has already been successfully opened. So now
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query it. */
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if (1 == component->mca_type_major_version
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&& 0 == component->mca_type_minor_version
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&& 0 == component->mca_type_release_version) {
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mca_scoll_base_component_t *scoll =
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(mca_scoll_base_component_t *) component;
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ret = scoll->scoll_init(enable_progress_threads, enable_threads);
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} else {
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/* Unrecognized coll API version */
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SCOLL_VERBOSE(10,
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"scoll:find_available: unrecognized scoll API version (%d.%d.%d, ignored)",
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component->mca_type_major_version,
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component->mca_type_minor_version,
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component->mca_type_release_version);
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return OSHMEM_ERROR;
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}
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/* Query done -- look at the return value to see what happened */
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if (OSHMEM_SUCCESS != ret) {
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SCOLL_VERBOSE(10,
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"scoll:find_available: scoll component %s is not available",
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component->mca_component_name);
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if (NULL != component->mca_close_component) {
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component->mca_close_component();
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}
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} else {
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SCOLL_VERBOSE(10,
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"scoll:find_available: scoll component %s is available",
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component->mca_component_name);
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}
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/* All done */
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return ret;
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}
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