afa654746c
last December. :-(
Add new MCA param: maffinity_libnuma_policy. Thanks to David
Singleton for the suggestion. Here's the help text about it:
{{{
MCA maffinity: parameter "maffinity_libnuma_policy" (current value:
<loose>, data source: default value)
Binding policy that determines what happens if memory
is unavailable on the local NUMA node. A value of
"strict" means that the memory allocation will fail;
a value of "loose" means that the memory allocation
will spill over to another NUMA node.
}}}
This commit was SVN r24290.
113 строки
3.6 KiB
C
113 строки
3.6 KiB
C
/*
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* Copyright (c) 2004-2008 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) 2011 Cisco Systems, Inc. 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 <numa.h>
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#include <numaif.h>
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#include <unistd.h>
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#include "opal/constants.h"
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#include "opal/util/show_help.h"
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#include "opal/mca/maffinity/maffinity.h"
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#include "maffinity_libnuma.h"
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/*
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* Public string showing the maffinity ompi_libnuma component version number
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*/
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const char *opal_maffinity_libnuma_component_version_string =
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"OPAL libnuma maffinity MCA component version " OPAL_VERSION;
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/*
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* Local functions
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*/
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static int libnuma_register(void);
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/*
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* Local variable
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*/
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static char *mca_policy = NULL;
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/*
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* Instantiate the public struct with all of our public information
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* and pointers to our public functions in it
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*/
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opal_maffinity_libnuma_component_2_0_0_t mca_maffinity_libnuma_component = {
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{
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/* First, the mca_component_t struct containing meta information
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about the component itself */
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{
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OPAL_MAFFINITY_BASE_VERSION_2_0_0,
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/* Component name and version */
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"libnuma",
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OPAL_MAJOR_VERSION,
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OPAL_MINOR_VERSION,
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OPAL_RELEASE_VERSION,
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/* Component open and close functions */
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NULL,
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NULL,
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opal_maffinity_libnuma_component_query,
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libnuma_register,
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},
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{
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/* The component is checkpoint ready */
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MCA_BASE_METADATA_PARAM_CHECKPOINT
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}
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},
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/* Default libnuma memory binding policy */
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MPOL_PREFERRED,
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};
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static int libnuma_register(void)
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{
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char *val;
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mca_base_param_reg_int(&mca_maffinity_libnuma_component.base.base_version,
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"priority",
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"Priority of the libnuma maffinity component",
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false, false, 25, NULL);
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val = (MPOL_PREFERRED == mca_maffinity_libnuma_component.libnuma_policy ?
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"loose" : "strict");
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mca_base_param_reg_string(&mca_maffinity_libnuma_component.base.base_version,
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"policy",
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"Binding policy that determines what happens if memory is unavailable on the local NUMA node. A value of \"strict\" means that the memory allocation will fail; a value of \"loose\" means that the memory allocation will spill over to another NUMA node.",
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false, false, val, &mca_policy);
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if (strcasecmp(mca_policy, "loose") == 0) {
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mca_maffinity_libnuma_component.libnuma_policy = MPOL_PREFERRED;
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} else if (strcasecmp(mca_policy, "strict") == 0) {
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mca_maffinity_libnuma_component.libnuma_policy = MPOL_BIND;
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} else {
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opal_show_help("help-opal-maffinity-libnuma.txt", "invalid policy",
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true, mca_policy, getpid());
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mca_maffinity_libnuma_component.libnuma_policy = MPOL_PREFERRED;
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return OPAL_ERR_BAD_PARAM;
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}
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return OPAL_SUCCESS;
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}
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