122 строки
4.5 KiB
C
122 строки
4.5 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 (c) 2008-2010 Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2010-2011 Los Alamos National Security, LLC.
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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 "opal_config.h"
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#include "opal/constants.h"
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#include "opal/util/output.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_param.h"
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#include "opal/mca/shmem/shmem.h"
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#include "opal/mca/shmem/base/base.h"
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/*
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* The following file was created by configure. It contains extern
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* statements and the definition of an array of pointers to each
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* component's public mca_base_component_t struct.
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*/
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#include "opal/mca/shmem/base/static-components.h"
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/**
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* globals
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*/
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OPAL_DECLSPEC int opal_shmem_base_output = -1;
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bool opal_shmem_base_components_opened_valid = false;
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opal_list_t opal_shmem_base_components_opened;
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bool opal_mmap_on_nfs_warning;
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/* ////////////////////////////////////////////////////////////////////////// */
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/**
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* Register some shmem-wide MCA params
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*/
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int
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opal_shmem_base_register_params(void)
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{
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int value;
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/* debugging/verbose output */
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mca_base_param_reg_int_name("shmem", "base_verbose",
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"Verbosity level of the shmem framework",
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false, false, 0, &value);
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/* register an INTERNAL parameter used to provide a component selection
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* hint to the shmem framework.
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*/
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mca_base_param_reg_string_name("shmem", "RUNTIME_QUERY_hint",
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"Internal OMPI parameter used to provide a "
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"component selection hint to the shmem "
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"framework. The value of this parameter "
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"is the name of the component that is "
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"available, selectable, and meets our "
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"run-time behavior requirements.",
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true, true, NULL, NULL);
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if (0 != value) {
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opal_shmem_base_output = opal_output_open(NULL);
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}
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else {
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opal_shmem_base_output = -1;
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}
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/*
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* Do we want the "warning: your mmap file is on NFS!" message? Per a
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* thread on the OMPI devel list
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* (http://www.open-mpi.org/community/lists/devel/2011/12/10054.php),
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* on some systems, it doesn't seem to matter. But per older threads,
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* it definitely does matter on some systems. Perhaps newer kernels
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* are smarter about this kind of stuff...? Regardless, we should
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* provide the ability to turn off this message for systems where the
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* effect doesn't matter.
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*/
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mca_base_param_reg_int_name("opal",
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"enable_shmem_on_nfs_warning",
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"Enable the warning emitted when Open MPI detects that its shared memory backing file is located on a network filesystem (1 = enabled, 0 = disabled).",
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false, false,
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(int)true, &value);
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opal_mmap_on_nfs_warning = OPAL_INT_TO_BOOL(value);
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return OPAL_SUCCESS;
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}
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/* ////////////////////////////////////////////////////////////////////////// */
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/**
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* Function for finding and opening either all MCA components, or the one
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* that was specifically requested via a MCA parameter.
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*/
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int
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opal_shmem_base_open(void)
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{
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opal_shmem_base_components_opened_valid = false;
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/* open up all available components */
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if (OPAL_SUCCESS !=
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mca_base_components_open("shmem", opal_shmem_base_output,
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mca_shmem_base_static_components,
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&opal_shmem_base_components_opened, true)) {
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return OPAL_ERROR;
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}
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opal_shmem_base_components_opened_valid = true;
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/* all done */
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return OPAL_SUCCESS;
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}
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