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#include <unistd.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <hwloc.h>
#include <hwloc/bitmap.h>
int main(int argc, char **argv)
{
hwloc_topology_t topo;
#if HWLOC_API_VERSION >= 0x20000
int ret;
#endif
int num, weight, N;
hwloc_obj_t obj;
unsigned width, w;
hwloc_bitmap_t numas[100], result;
int m;
char *tmp, cpus[2048];
bool overlap = false;
if (2 != argc) {
fprintf(stderr, "Usage: %s xml-filename\n", argv[0]);
return -1;
}
if (0 != hwloc_topology_init(&topo)) {
return -1;
}
if (0 != hwloc_topology_set_xml(topo, argv[1])) {
fprintf(stderr, "SETXML FAILED\n");
return -1;
}
/* since we are loading this from an external source, we have to
* explicitly set a flag so hwloc sets things up correctly
*/
#if HWLOC_API_VERSION >= 0x20000
ret = hwloc_topology_set_io_types_filter(topo, HWLOC_TYPE_FILTER_KEEP_IMPORTANT);
if (0 != ret) {
fprintf(stderr, "IOTYPES FAILED\n");
hwloc_topology_destroy(topo);
return ret;
}
#endif
if (0 != hwloc_topology_set_flags(topo, HWLOC_TOPOLOGY_FLAG_IS_THISSYSTEM)) {
fprintf(stderr, "SETFLAGS FAILED\n");
hwloc_topology_destroy(topo);
return -1;
}
/* now load the topology */
if (0 != hwloc_topology_load(topo)) {
fprintf(stderr, "LOAD FAILED\n");
hwloc_topology_destroy(topo);
return -1;
}
num = hwloc_get_nbobjs_by_type(topo, HWLOC_OBJ_NUMANODE);
fprintf(stderr, "NUM NUMAS: %d\n", num);
if (0 > num) {
return -1;
}
width = (unsigned)num;
N = 0;
for (w = 0; w < width; w++) {
/* get the object at this index */
obj = hwloc_get_obj_by_type(topo, HWLOC_OBJ_NUMANODE, w);
/* how many pu's are under it? */
weight = hwloc_bitmap_weight(obj->cpuset);
hwloc_bitmap_list_snprintf(cpus, 2048, obj->cpuset);
fprintf(stderr, "NUMA: %u OSINDX: %u NPUS: %d PUS: %s\n", w, obj->os_index, weight, cpus);
/* check for overlap with all preceding numas */
for (m=0; m < N; m++) {
if (hwloc_bitmap_intersects(obj->cpuset, numas[m])) {
result = hwloc_bitmap_alloc();
hwloc_bitmap_and(result, obj->cpuset, numas[m]);
hwloc_bitmap_asprintf(&tmp, result);
fprintf(stderr, "\tINTERSECTS NUMA %d: %s\n", m, tmp);
hwloc_bitmap_free(result);
free(tmp);
}
}
/* cache this bitmap */
numas[N] = hwloc_bitmap_alloc();
hwloc_bitmap_copy(numas[N], obj->cpuset);
++N;
}
if (!overlap) {
fprintf(stderr, "NO OVERLAP\n");
}
}
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