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/*
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2005 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "opal_config.h"
#include <string.h>
#include <numa.h>
#include "opal/constants.h"
#include "opal/mca/maffinity/maffinity.h"
#include "opal/mca/maffinity/base/base.h"
#include "maffinity_libnuma.h"
/*
* Local functions
*/
static int libnuma_module_init(void);
static int libnuma_module_set(opal_maffinity_base_segment_t *segments,
size_t num_segments);
/*
* Libnuma maffinity module
*/
static const opal_maffinity_base_module_1_0_0_t module = {
/* Initialization function */
libnuma_module_init,
/* Module function pointers */
libnuma_module_set
};
const opal_maffinity_base_module_1_0_0_t *
opal_maffinity_libnuma_component_query(int *query)
{
int param;
if (-1 == numa_available()) {
return NULL;
}
param = mca_base_param_find("maffinity", "libnuma", "priority");
mca_base_param_lookup_int(param, query);
return &module;
}
static int libnuma_module_init(void)
{
/* Tell libnuma that we want all memory affinity to be local (but
it's not an error if we can't -- prefer running in degraded
mode to not running at all!). */
numa_set_strict(0);
numa_set_localalloc();
return OPAL_SUCCESS;
}
static int libnuma_module_set(opal_maffinity_base_segment_t *segments,
size_t num_segments)
{
size_t i;
/* Kinda crummy that we have to allocate each portion individually
rather than provide a top-level function call that does it all,
but the libnuma() interface doesn't seem to allow that
flexability -- they allow "interleaving", but not fine grained
placement of pages. */
for (i = 0; i < num_segments; ++i) {
numa_setlocal_memory(segments[i].mbs_start_addr,
segments[i].mbs_len);
}
return OPAL_SUCCESS;
}
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