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/*
* Copyright © 2009 CNRS
* Copyright © 2009-2019 Inria. All rights reserved.
* Copyright © 2009-2012, 2020 Université Bordeaux
* Copyright © 2009-2011 Cisco Systems, Inc. All rights reserved.
* See COPYING in top-level directory.
*/
#include "private/autogen/config.h"
#include "hwloc.h"
#include "private/private.h"
static int
hwloc_look_noos(struct hwloc_backend *backend, struct hwloc_disc_status *dstatus)
{
/*
* This backend uses the underlying OS.
* However we don't enforce topology->is_thissystem so that
* we may still force use this backend when debugging with !thissystem.
*/
struct hwloc_topology *topology = backend->topology;
int64_t memsize;
assert(dstatus->phase == HWLOC_DISC_PHASE_CPU);
if (!topology->levels[0][0]->cpuset) {
int nbprocs;
/* Nobody (even the x86 backend) created objects yet, setup basic objects */
nbprocs = hwloc_fallback_nbprocessors(0);
if (nbprocs >= 1)
topology->support.discovery->pu = 1;
else
nbprocs = 1;
hwloc_alloc_root_sets(topology->levels[0][0]);
hwloc_setup_pu_level(topology, nbprocs);
}
memsize = hwloc_fallback_memsize();
if (memsize > 0)
topology->machine_memory.local_memory = memsize;;
hwloc_add_uname_info(topology, NULL);
return 0;
}
static struct hwloc_backend *
hwloc_noos_component_instantiate(struct hwloc_topology *topology,
struct hwloc_disc_component *component,
unsigned excluded_phases __hwloc_attribute_unused,
const void *_data1 __hwloc_attribute_unused,
const void *_data2 __hwloc_attribute_unused,
const void *_data3 __hwloc_attribute_unused)
{
struct hwloc_backend *backend;
backend = hwloc_backend_alloc(topology, component);
if (!backend)
return NULL;
backend->discover = hwloc_look_noos;
return backend;
}
static struct hwloc_disc_component hwloc_noos_disc_component = {
"no_os",
HWLOC_DISC_PHASE_CPU,
HWLOC_DISC_PHASE_GLOBAL,
hwloc_noos_component_instantiate,
40, /* lower than native OS component, higher than globals */
1,
NULL
};
const struct hwloc_component hwloc_noos_component = {
HWLOC_COMPONENT_ABI,
NULL, NULL,
HWLOC_COMPONENT_TYPE_DISC,
0,
&hwloc_noos_disc_component
};
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