Hardware Locality (hwloc) 1.6.2

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helper.h
1 /*
2 * Copyright © 2009 CNRS
3 * Copyright © 2009-2012 inria. All rights reserved.
4 * Copyright © 2009-2012 Université Bordeaux 1
5 * Copyright © 2009-2010 Cisco Systems, Inc. All rights reserved.
6 * See COPYING in top-level directory.
7 */
8
13 #ifndef HWLOC_HELPER_H
14 #define HWLOC_HELPER_H
15
16 #ifndef HWLOC_H
17 #error Please include the main hwloc.h instead
18 #endif
19
20 #include <stdlib.h>
21 #include <errno.h>
22
23
24 #ifdef __cplusplus
25 extern "C" {
26 #endif
27
28
47 static inline int
48 hwloc_get_type_or_below_depth (hwloc_topology_t topology, hwloc_obj_type_t type) ;
49 static inline int
50 hwloc_get_type_or_below_depth (hwloc_topology_t topology, hwloc_obj_type_t type)
51 {
52 int depth = hwloc_get_type_depth(topology, type);
53
54 if (depth != HWLOC_TYPE_DEPTH_UNKNOWN)
55 return depth;
56
57 /* find the highest existing level with type order >= */
58 for(depth = hwloc_get_type_depth(topology, HWLOC_OBJ_PU); ; depth--)
59 if (hwloc_compare_types(hwloc_get_depth_type(topology, depth), type) < 0)
60 return depth+1;
61
62 /* Shouldn't ever happen, as there is always a SYSTEM level with lower order and known depth. */
63 /* abort(); */
64 }
65
75 static inline int
76 hwloc_get_type_or_above_depth (hwloc_topology_t topology, hwloc_obj_type_t type) ;
77 static inline int
78 hwloc_get_type_or_above_depth (hwloc_topology_t topology, hwloc_obj_type_t type)
79 {
80 int depth = hwloc_get_type_depth(topology, type);
81
82 if (depth != HWLOC_TYPE_DEPTH_UNKNOWN)
83 return depth;
84
85 /* find the lowest existing level with type order <= */
86 for(depth = 0; ; depth++)
87 if (hwloc_compare_types(hwloc_get_depth_type(topology, depth), type) > 0)
88 return depth-1;
89
90 /* Shouldn't ever happen, as there is always a PU level with higher order and known depth. */
91 /* abort(); */
92 }
93
113 static inline hwloc_obj_t
114 hwloc_get_root_obj (hwloc_topology_t topology) ;
115 static inline hwloc_obj_t
116 hwloc_get_root_obj (hwloc_topology_t topology)
117 {
118 return hwloc_get_obj_by_depth (topology, 0, 0);
119 }
120
122 static inline hwloc_obj_t
123 hwloc_get_ancestor_obj_by_depth (hwloc_topology_t topology , unsigned depth, hwloc_obj_t obj) ;
124 static inline hwloc_obj_t
125 hwloc_get_ancestor_obj_by_depth (hwloc_topology_t topology , unsigned depth, hwloc_obj_t obj)
126 {
127 hwloc_obj_t ancestor = obj;
128 if (obj->depth < depth)
129 return NULL;
130 while (ancestor && ancestor->depth > depth)
131 ancestor = ancestor->parent;
132 return ancestor;
133 }
134
136 static inline hwloc_obj_t
137 hwloc_get_ancestor_obj_by_type (hwloc_topology_t topology , hwloc_obj_type_t type, hwloc_obj_t obj) ;
138 static inline hwloc_obj_t
139 hwloc_get_ancestor_obj_by_type (hwloc_topology_t topology , hwloc_obj_type_t type, hwloc_obj_t obj)
140 {
141 hwloc_obj_t ancestor = obj->parent;
142 while (ancestor && ancestor->type != type)
143 ancestor = ancestor->parent;
144 return ancestor;
145 }
146
151 static inline hwloc_obj_t
152 hwloc_get_next_obj_by_depth (hwloc_topology_t topology, unsigned depth, hwloc_obj_t prev)
153 {
154 if (!prev)
155 return hwloc_get_obj_by_depth (topology, depth, 0);
156 if (prev->depth != depth)
157 return NULL;
158 return prev->next_cousin;
159 }
160
167 static inline hwloc_obj_t
168 hwloc_get_next_obj_by_type (hwloc_topology_t topology, hwloc_obj_type_t type,
169 hwloc_obj_t prev)
170 {
171 int depth = hwloc_get_type_depth(topology, type);
172 if (depth == HWLOC_TYPE_DEPTH_UNKNOWN || depth == HWLOC_TYPE_DEPTH_MULTIPLE)
173 return NULL;
174 return hwloc_get_next_obj_by_depth (topology, depth, prev);
175 }
176
185 static inline hwloc_obj_t
186 hwloc_get_pu_obj_by_os_index(hwloc_topology_t topology, unsigned os_index) ;
187 static inline hwloc_obj_t
188 hwloc_get_pu_obj_by_os_index(hwloc_topology_t topology, unsigned os_index)
189 {
190 hwloc_obj_t obj = NULL;
191 while ((obj = hwloc_get_next_obj_by_type(topology, HWLOC_OBJ_PU, obj)) != NULL)
192 if (obj->os_index == os_index)
193 return obj;
194 return NULL;
195 }
196
201 static inline hwloc_obj_t
202 hwloc_get_next_child (hwloc_topology_t topology , hwloc_obj_t parent, hwloc_obj_t prev)
203 {
204 if (!prev)
205 return parent->first_child;
206 if (prev->parent != parent)
207 return NULL;
208 return prev->next_sibling;
209 }
210
212 static inline hwloc_obj_t
213 hwloc_get_common_ancestor_obj (hwloc_topology_t topology , hwloc_obj_t obj1, hwloc_obj_t obj2) ;
214 static inline hwloc_obj_t
215 hwloc_get_common_ancestor_obj (hwloc_topology_t topology , hwloc_obj_t obj1, hwloc_obj_t obj2)
216 {
217 /* the loop isn't so easy since intermediate ancestors may have
218 * different depth, causing us to alternate between using obj1->parent
219 * and obj2->parent. Also, even if at some point we find ancestors of
220 * of the same depth, their ancestors may have different depth again.
221 */
222 while (obj1 != obj2) {
223 while (obj1->depth > obj2->depth)
224 obj1 = obj1->parent;
225 while (obj2->depth > obj1->depth)
226 obj2 = obj2->parent;
227 if (obj1 != obj2 && obj1->depth == obj2->depth) {
228 obj1 = obj1->parent;
229 obj2 = obj2->parent;
230 }
231 }
232 return obj1;
233 }
234
239 static inline int
240 hwloc_obj_is_in_subtree (hwloc_topology_t topology , hwloc_obj_t obj, hwloc_obj_t subtree_root) ;
241 static inline int
242 hwloc_obj_is_in_subtree (hwloc_topology_t topology , hwloc_obj_t obj, hwloc_obj_t subtree_root)
243 {
244 return hwloc_bitmap_isincluded(obj->cpuset, subtree_root->cpuset);
245 }
246
266 static inline hwloc_obj_t
267 hwloc_get_first_largest_obj_inside_cpuset(hwloc_topology_t topology, hwloc_const_cpuset_t set)
268 {
269 hwloc_obj_t obj = hwloc_get_root_obj(topology);
270 if (!obj->cpuset || !hwloc_bitmap_intersects(obj->cpuset, set))
271 return NULL;
272 while (!hwloc_bitmap_isincluded(obj->cpuset, set)) {
273 /* while the object intersects without being included, look at its children */
274 hwloc_obj_t child = NULL;
275 while ((child = hwloc_get_next_child(topology, obj, child)) != NULL) {
276 if (child->cpuset && hwloc_bitmap_intersects(child->cpuset, set))
277 break;
278 }
279 if (!child)
280 /* no child intersects, return their father */
281 return obj;
282 /* found one intersecting child, look at its children */
283 obj = child;
284 }
285 /* obj is included, return it */
286 return obj;
287 }
288
296 int hwloc_get_largest_objs_inside_cpuset (hwloc_topology_t topology, hwloc_const_cpuset_t set,
297 hwloc_obj_t * restrict objs, int max);
298
308 static inline hwloc_obj_t
309 hwloc_get_next_obj_inside_cpuset_by_depth (hwloc_topology_t topology, hwloc_const_cpuset_t set,
310 unsigned depth, hwloc_obj_t prev)
311 {
312 hwloc_obj_t next = hwloc_get_next_obj_by_depth(topology, depth, prev);
313 if (!next || !next->cpuset)
314 return NULL;
315 while (next && !hwloc_bitmap_isincluded(next->cpuset, set))
316 next = next->next_cousin;
317 return next;
318 }
319
329 static inline hwloc_obj_t
330 hwloc_get_next_obj_inside_cpuset_by_type (hwloc_topology_t topology, hwloc_const_cpuset_t set,
331 hwloc_obj_type_t type, hwloc_obj_t prev)
332 {
333 int depth = hwloc_get_type_depth(topology, type);
334 if (depth == HWLOC_TYPE_DEPTH_UNKNOWN || depth == HWLOC_TYPE_DEPTH_MULTIPLE)
335 return NULL;
336 return hwloc_get_next_obj_inside_cpuset_by_depth(topology, set, depth, prev);
337 }
338
344 static inline hwloc_obj_t
345 hwloc_get_obj_inside_cpuset_by_depth (hwloc_topology_t topology, hwloc_const_cpuset_t set,
346 unsigned depth, unsigned idx) ;
347 static inline hwloc_obj_t
348 hwloc_get_obj_inside_cpuset_by_depth (hwloc_topology_t topology, hwloc_const_cpuset_t set,
349 unsigned depth, unsigned idx)
350 {
351 hwloc_obj_t obj = hwloc_get_obj_by_depth (topology, depth, 0);
352 unsigned count = 0;
353 if (!obj || !obj->cpuset)
354 return NULL;
355 while (obj) {
356 if (hwloc_bitmap_isincluded(obj->cpuset, set)) {
357 if (count == idx)
358 return obj;
359 count++;
360 }
361 obj = obj->next_cousin;
362 }
363 return NULL;
364 }
365
375 static inline hwloc_obj_t
376 hwloc_get_obj_inside_cpuset_by_type (hwloc_topology_t topology, hwloc_const_cpuset_t set,
377 hwloc_obj_type_t type, unsigned idx) ;
378 static inline hwloc_obj_t
379 hwloc_get_obj_inside_cpuset_by_type (hwloc_topology_t topology, hwloc_const_cpuset_t set,
380 hwloc_obj_type_t type, unsigned idx)
381 {
382 int depth = hwloc_get_type_depth(topology, type);
383 if (depth == HWLOC_TYPE_DEPTH_UNKNOWN || depth == HWLOC_TYPE_DEPTH_MULTIPLE)
384 return NULL;
385 return hwloc_get_obj_inside_cpuset_by_depth(topology, set, depth, idx);
386 }
387
393 static inline unsigned
394 hwloc_get_nbobjs_inside_cpuset_by_depth (hwloc_topology_t topology, hwloc_const_cpuset_t set,
395 unsigned depth) ;
396 static inline unsigned
397 hwloc_get_nbobjs_inside_cpuset_by_depth (hwloc_topology_t topology, hwloc_const_cpuset_t set,
398 unsigned depth)
399 {
400 hwloc_obj_t obj = hwloc_get_obj_by_depth (topology, depth, 0);
401 unsigned count = 0;
402 if (!obj || !obj->cpuset)
403 return 0;
404 while (obj) {
405 if (hwloc_bitmap_isincluded(obj->cpuset, set))
406 count++;
407 obj = obj->next_cousin;
408 }
409 return count;
410 }
411
421 static inline int
422 hwloc_get_nbobjs_inside_cpuset_by_type (hwloc_topology_t topology, hwloc_const_cpuset_t set,
423 hwloc_obj_type_t type) ;
424 static inline int
425 hwloc_get_nbobjs_inside_cpuset_by_type (hwloc_topology_t topology, hwloc_const_cpuset_t set,
426 hwloc_obj_type_t type)
427 {
428 int depth = hwloc_get_type_depth(topology, type);
429 if (depth == HWLOC_TYPE_DEPTH_UNKNOWN)
430 return 0;
431 if (depth == HWLOC_TYPE_DEPTH_MULTIPLE)
432 return -1; /* FIXME: agregate nbobjs from different levels? */
433 return hwloc_get_nbobjs_inside_cpuset_by_depth(topology, set, depth);
434 }
435
444 static inline int
445 hwloc_get_obj_index_inside_cpuset (hwloc_topology_t topology , hwloc_const_cpuset_t set,
446 hwloc_obj_t obj) ;
447 static inline int
448 hwloc_get_obj_index_inside_cpuset (hwloc_topology_t topology , hwloc_const_cpuset_t set,
449 hwloc_obj_t obj)
450 {
451 int idx = 0;
452 if (!hwloc_bitmap_isincluded(obj->cpuset, set))
453 return -1;
454 /* count how many objects are inside the cpuset on the way from us to the beginning of the level */
455 while ((obj = obj->prev_cousin) != NULL)
456 if (hwloc_bitmap_isincluded(obj->cpuset, set))
457 idx++;
458 return idx;
459 }
460
475 static inline hwloc_obj_t
476 hwloc_get_child_covering_cpuset (hwloc_topology_t topology , hwloc_const_cpuset_t set,
477 hwloc_obj_t parent) ;
478 static inline hwloc_obj_t
479 hwloc_get_child_covering_cpuset (hwloc_topology_t topology , hwloc_const_cpuset_t set,
480 hwloc_obj_t parent)
481 {
482 hwloc_obj_t child;
483 if (!parent->cpuset || hwloc_bitmap_iszero(set))
484 return NULL;
485 child = parent->first_child;
486 while (child) {
487 if (child->cpuset && hwloc_bitmap_isincluded(set, child->cpuset))
488 return child;
489 child = child->next_sibling;
490 }
491 return NULL;
492 }
493
501 static inline hwloc_obj_t
502 hwloc_get_obj_covering_cpuset (hwloc_topology_t topology, hwloc_const_cpuset_t set) ;
503 static inline hwloc_obj_t
504 hwloc_get_obj_covering_cpuset (hwloc_topology_t topology, hwloc_const_cpuset_t set)
505 {
506 struct hwloc_obj *current = hwloc_get_root_obj(topology);
507 if (hwloc_bitmap_iszero(set) || !current->cpuset || !hwloc_bitmap_isincluded(set, current->cpuset))
508 return NULL;
509 while (1) {
510 hwloc_obj_t child = hwloc_get_child_covering_cpuset(topology, set, current);
511 if (!child)
512 return current;
513 current = child;
514 }
515 }
516
517
536 static inline hwloc_obj_t
537 hwloc_get_next_obj_covering_cpuset_by_depth(hwloc_topology_t topology, hwloc_const_cpuset_t set,
538 unsigned depth, hwloc_obj_t prev)
539 {
540 hwloc_obj_t next = hwloc_get_next_obj_by_depth(topology, depth, prev);
541 if (!next || !next->cpuset)
542 return NULL;
543 while (next && !hwloc_bitmap_intersects(set, next->cpuset))
544 next = next->next_cousin;
545 return next;
546 }
547
563 static inline hwloc_obj_t
564 hwloc_get_next_obj_covering_cpuset_by_type(hwloc_topology_t topology, hwloc_const_cpuset_t set,
565 hwloc_obj_type_t type, hwloc_obj_t prev)
566 {
567 int depth = hwloc_get_type_depth(topology, type);
568 if (depth == HWLOC_TYPE_DEPTH_UNKNOWN || depth == HWLOC_TYPE_DEPTH_MULTIPLE)
569 return NULL;
570 return hwloc_get_next_obj_covering_cpuset_by_depth(topology, set, depth, prev);
571 }
572
600 static inline int
601 hwloc_get_cache_type_depth (hwloc_topology_t topology,
602 unsigned cachelevel, hwloc_obj_cache_type_t cachetype)
603 {
604 int depth;
605 int found = HWLOC_TYPE_DEPTH_UNKNOWN;
606 for (depth=0; ; depth++) {
607 hwloc_obj_t obj = hwloc_get_obj_by_depth(topology, depth, 0);
608 if (!obj)
609 break;
610 if (obj->type != HWLOC_OBJ_CACHE || obj->attr->cache.depth != cachelevel)
611 /* doesn't match, try next depth */
612 continue;
613 if (cachetype == (hwloc_obj_cache_type_t) -1) {
614 if (found != HWLOC_TYPE_DEPTH_UNKNOWN) {
615 /* second match, return MULTIPLE */
616 return HWLOC_TYPE_DEPTH_MULTIPLE;
617 }
618 /* first match, mark it as found */
619 found = depth;
620 continue;
621 }
622 if (obj->attr->cache.type == cachetype || obj->attr->cache.type == HWLOC_OBJ_CACHE_UNIFIED)
623 /* exact match (either unified is alone, or we match instruction or data), return immediately */
624 return depth;
625 }
626 /* went to the bottom, return what we found */
627 return found;
628 }
629
637 static inline hwloc_obj_t
638 hwloc_get_cache_covering_cpuset (hwloc_topology_t topology, hwloc_const_cpuset_t set) ;
639 static inline hwloc_obj_t
640 hwloc_get_cache_covering_cpuset (hwloc_topology_t topology, hwloc_const_cpuset_t set)
641 {
642 hwloc_obj_t current = hwloc_get_obj_covering_cpuset(topology, set);
643 while (current) {
644 if (current->type == HWLOC_OBJ_CACHE)
645 return current;
646 current = current->parent;
647 }
648 return NULL;
649 }
650
655 static inline hwloc_obj_t
656 hwloc_get_shared_cache_covering_obj (hwloc_topology_t topology , hwloc_obj_t obj) ;
657 static inline hwloc_obj_t
658 hwloc_get_shared_cache_covering_obj (hwloc_topology_t topology , hwloc_obj_t obj)
659 {
660 hwloc_obj_t current = obj->parent;
661 if (!obj->cpuset)
662 return NULL;
663 while (current && current->cpuset) {
664 if (!hwloc_bitmap_isequal(current->cpuset, obj->cpuset)
665 && current->type == HWLOC_OBJ_CACHE)
666 return current;
667 current = current->parent;
668 }
669 return NULL;
670 }
671
696 /* TODO: rather provide an iterator? Provide a way to know how much should be allocated? By returning the total number of objects instead? */
697 unsigned hwloc_get_closest_objs (hwloc_topology_t topology, hwloc_obj_t src, hwloc_obj_t * restrict objs, unsigned max);
698
711 static inline hwloc_obj_t
712 hwloc_get_obj_below_by_type (hwloc_topology_t topology,
713 hwloc_obj_type_t type1, unsigned idx1,
714 hwloc_obj_type_t type2, unsigned idx2) ;
715 static inline hwloc_obj_t
716 hwloc_get_obj_below_by_type (hwloc_topology_t topology,
717 hwloc_obj_type_t type1, unsigned idx1,
718 hwloc_obj_type_t type2, unsigned idx2)
719 {
720 hwloc_obj_t obj;
721 obj = hwloc_get_obj_by_type (topology, type1, idx1);
722 if (!obj || !obj->cpuset)
723 return NULL;
724 return hwloc_get_obj_inside_cpuset_by_type(topology, obj->cpuset, type2, idx2);
725 }
726
745 static inline hwloc_obj_t
746 hwloc_get_obj_below_array_by_type (hwloc_topology_t topology, int nr, hwloc_obj_type_t *typev, unsigned *idxv) ;
747 static inline hwloc_obj_t
748 hwloc_get_obj_below_array_by_type (hwloc_topology_t topology, int nr, hwloc_obj_type_t *typev, unsigned *idxv)
749 {
750 hwloc_obj_t obj = hwloc_get_root_obj(topology);
751 int i;
752 for(i=0; i<nr; i++) {
753 if (!obj || !obj->cpuset)
754 return NULL;
755 obj = hwloc_get_obj_inside_cpuset_by_type(topology, obj->cpuset, typev[i], idxv[i]);
756 }
757 return obj;
758 }
759
783 static inline void
784 hwloc_distributev(hwloc_topology_t topology, hwloc_obj_t *root, unsigned n_roots, hwloc_cpuset_t *cpuset, unsigned n, unsigned until);
785 static inline void
786 hwloc_distribute(hwloc_topology_t topology, hwloc_obj_t root, hwloc_cpuset_t *cpuset, unsigned n, unsigned until)
787 {
788 unsigned i;
789 if (!root->arity || n == 1 || root->depth >= until) {
790 /* Got to the bottom, we can't split any more, put everything there. */
791 for (i=0; i<n; i++)
792 cpuset[i] = hwloc_bitmap_dup(root->cpuset);
793 return;
794 }
795 hwloc_distributev(topology, root->children, root->arity, cpuset, n, until);
796 }
797
805 static inline void
806 hwloc_distributev(hwloc_topology_t topology, hwloc_obj_t *roots, unsigned n_roots, hwloc_cpuset_t *cpuset, unsigned n, unsigned until)
807 {
808 unsigned i;
809 unsigned tot_weight;
810 hwloc_cpuset_t *cpusetp = cpuset;
811
812 tot_weight = 0;
813 for (i = 0; i < n_roots; i++)
814 if (roots[i]->cpuset)
815 tot_weight += hwloc_bitmap_weight(roots[i]->cpuset);
816
817 for (i = 0; i < n_roots && tot_weight; i++) {
818 /* Give to roots[i] a portion proportional to its weight */
819 unsigned weight = roots[i]->cpuset ? hwloc_bitmap_weight(roots[i]->cpuset) : 0;
820 unsigned chunk = (n * weight + tot_weight-1) / tot_weight;
821 hwloc_distribute(topology, roots[i], cpusetp, chunk, until);
822 cpusetp += chunk;
823 tot_weight -= weight;
824 n -= chunk;
825 }
826 }
827
834 static inline void *
835 hwloc_alloc_membind_policy_nodeset(hwloc_topology_t topology, size_t len, hwloc_const_nodeset_t nodeset, hwloc_membind_policy_t policy, int flags)
836 {
837 void *p = hwloc_alloc_membind_nodeset(topology, len, nodeset, policy, flags);
838 if (p)
839 return p;
840 hwloc_set_membind_nodeset(topology, nodeset, policy, flags);
841 p = hwloc_alloc(topology, len);
842 if (p && policy != HWLOC_MEMBIND_FIRSTTOUCH)
843 /* Enforce the binding by touching the data */
844 memset(p, 0, len);
845 return p;
846 }
847
852 static inline void *
853 hwloc_alloc_membind_policy(hwloc_topology_t topology, size_t len, hwloc_const_cpuset_t cpuset, hwloc_membind_policy_t policy, int flags)
854 {
855 void *p = hwloc_alloc_membind(topology, len, cpuset, policy, flags);
856 if (p)
857 return p;
858 hwloc_set_membind(topology, cpuset, policy, flags);
859 p = hwloc_alloc(topology, len);
860 if (p && policy != HWLOC_MEMBIND_FIRSTTOUCH)
861 /* Enforce the binding by touching the data */
862 memset(p, 0, len);
863 return p;
864 }
865
882 static inline hwloc_const_cpuset_t
883 hwloc_topology_get_complete_cpuset(hwloc_topology_t topology) ;
884 static inline hwloc_const_cpuset_t
885 hwloc_topology_get_complete_cpuset(hwloc_topology_t topology)
886 {
887 return hwloc_get_root_obj(topology)->complete_cpuset;
888 }
889
900 static inline hwloc_const_cpuset_t
901 hwloc_topology_get_topology_cpuset(hwloc_topology_t topology) ;
902 static inline hwloc_const_cpuset_t
903 hwloc_topology_get_topology_cpuset(hwloc_topology_t topology)
904 {
905 return hwloc_get_root_obj(topology)->cpuset;
906 }
907
917 static inline hwloc_const_cpuset_t
918 hwloc_topology_get_online_cpuset(hwloc_topology_t topology) ;
919 static inline hwloc_const_cpuset_t
920 hwloc_topology_get_online_cpuset(hwloc_topology_t topology)
921 {
922 return hwloc_get_root_obj(topology)->online_cpuset;
923 }
924
934 static inline hwloc_const_cpuset_t
935 hwloc_topology_get_allowed_cpuset(hwloc_topology_t topology) ;
936 static inline hwloc_const_cpuset_t
937 hwloc_topology_get_allowed_cpuset(hwloc_topology_t topology)
938 {
939 return hwloc_get_root_obj(topology)->allowed_cpuset;
940 }
941
958 static inline hwloc_const_nodeset_t
959 hwloc_topology_get_complete_nodeset(hwloc_topology_t topology) ;
960 static inline hwloc_const_nodeset_t
961 hwloc_topology_get_complete_nodeset(hwloc_topology_t topology)
962 {
963 return hwloc_get_root_obj(topology)->complete_nodeset;
964 }
965
976 static inline hwloc_const_nodeset_t
977 hwloc_topology_get_topology_nodeset(hwloc_topology_t topology) ;
978 static inline hwloc_const_nodeset_t
979 hwloc_topology_get_topology_nodeset(hwloc_topology_t topology)
980 {
981 return hwloc_get_root_obj(topology)->nodeset;
982 }
983
993 static inline hwloc_const_nodeset_t
994 hwloc_topology_get_allowed_nodeset(hwloc_topology_t topology) ;
995 static inline hwloc_const_nodeset_t
996 hwloc_topology_get_allowed_nodeset(hwloc_topology_t topology)
997 {
998 return hwloc_get_root_obj(topology)->allowed_nodeset;
999 }
1000
1031 static inline void
1032 hwloc_cpuset_to_nodeset(hwloc_topology_t topology, hwloc_const_cpuset_t cpuset, hwloc_nodeset_t nodeset)
1033 {
1034 int depth = hwloc_get_type_depth(topology, HWLOC_OBJ_NODE);
1035 hwloc_obj_t obj;
1036
1037 if (depth == HWLOC_TYPE_DEPTH_UNKNOWN) {
1038 if (hwloc_bitmap_iszero(cpuset))
1039 hwloc_bitmap_zero(nodeset);
1040 else
1041 /* Assume the whole system */
1042 hwloc_bitmap_fill(nodeset);
1043 return;
1044 }
1045
1046 hwloc_bitmap_zero(nodeset);
1047 obj = NULL;
1048 while ((obj = hwloc_get_next_obj_covering_cpuset_by_depth(topology, cpuset, depth, obj)) != NULL)
1049 hwloc_bitmap_set(nodeset, obj->os_index);
1050 }
1051
1059 static inline void
1060 hwloc_cpuset_to_nodeset_strict(struct hwloc_topology *topology, hwloc_const_cpuset_t cpuset, hwloc_nodeset_t nodeset)
1061 {
1062 int depth = hwloc_get_type_depth(topology, HWLOC_OBJ_NODE);
1063 hwloc_obj_t obj;
1064 if (depth == HWLOC_TYPE_DEPTH_UNKNOWN )
1065 return;
1066 hwloc_bitmap_zero(nodeset);
1067 obj = NULL;
1068 while ((obj = hwloc_get_next_obj_covering_cpuset_by_depth(topology, cpuset, depth, obj)) != NULL)
1069 hwloc_bitmap_set(nodeset, obj->os_index);
1070 }
1071
1080 static inline void
1081 hwloc_cpuset_from_nodeset(hwloc_topology_t topology, hwloc_cpuset_t cpuset, hwloc_const_nodeset_t nodeset)
1082 {
1083 int depth = hwloc_get_type_depth(topology, HWLOC_OBJ_NODE);
1084 hwloc_obj_t obj;
1085
1086 if (depth == HWLOC_TYPE_DEPTH_UNKNOWN ) {
1087 if (hwloc_bitmap_iszero(nodeset))
1088 hwloc_bitmap_zero(cpuset);
1089 else
1090 /* Assume the whole system */
1091 hwloc_bitmap_fill(cpuset);
1092 return;
1093 }
1094
1095 hwloc_bitmap_zero(cpuset);
1096 obj = NULL;
1097 while ((obj = hwloc_get_next_obj_by_depth(topology, depth, obj)) != NULL) {
1098 if (hwloc_bitmap_isset(nodeset, obj->os_index))
1099 /* no need to check obj->cpuset because objects in levels always have a cpuset */
1100 hwloc_bitmap_or(cpuset, cpuset, obj->cpuset);
1101 }
1102 }
1103
1111 static inline void
1112 hwloc_cpuset_from_nodeset_strict(struct hwloc_topology *topology, hwloc_cpuset_t cpuset, hwloc_const_nodeset_t nodeset)
1113 {
1114 int depth = hwloc_get_type_depth(topology, HWLOC_OBJ_NODE);
1115 hwloc_obj_t obj;
1116 if (depth == HWLOC_TYPE_DEPTH_UNKNOWN )
1117 return;
1118 hwloc_bitmap_zero(cpuset);
1119 obj = NULL;
1120 while ((obj = hwloc_get_next_obj_by_depth(topology, depth, obj)) != NULL)
1121 if (hwloc_bitmap_isset(nodeset, obj->os_index))
1122 /* no need to check obj->cpuset because objects in levels always have a cpuset */
1123 hwloc_bitmap_or(cpuset, cpuset, obj->cpuset);
1124 }
1125
1153 static inline const struct hwloc_distances_s *
1154 hwloc_get_whole_distance_matrix_by_depth(hwloc_topology_t topology, unsigned depth)
1155 {
1156 hwloc_obj_t root = hwloc_get_root_obj(topology);
1157 unsigned i;
1158 for(i=0; i<root->distances_count; i++)
1159 if (root->distances[i]->relative_depth == depth)
1160 return root->distances[i];
1161 return NULL;
1162 }
1163
1183 static inline const struct hwloc_distances_s *
1184 hwloc_get_whole_distance_matrix_by_type(hwloc_topology_t topology, hwloc_obj_type_t type)
1185 {
1186 int depth = hwloc_get_type_depth(topology, type);
1187 if (depth < 0)
1188 return NULL;
1189 return hwloc_get_whole_distance_matrix_by_depth(topology, depth);
1190 }
1191
1205 static inline const struct hwloc_distances_s *
1206 hwloc_get_distance_matrix_covering_obj_by_depth(hwloc_topology_t topology,
1207 hwloc_obj_t obj, unsigned depth,
1208 unsigned *firstp)
1209 {
1210 while (obj && obj->cpuset) {
1211 unsigned i;
1212 for(i=0; i<obj->distances_count; i++)
1213 if (obj->distances[i]->relative_depth == depth - obj->depth) {
1214 if (!obj->distances[i]->nbobjs)
1215 continue;
1216 *firstp = hwloc_get_next_obj_inside_cpuset_by_depth(topology, obj->cpuset, depth, NULL)->logical_index;
1217 return obj->distances[i];
1218 }
1219 obj = obj->parent;
1220 }
1221 return NULL;
1222 }
1223
1235 static inline int
1236 hwloc_get_latency(hwloc_topology_t topology,
1237 hwloc_obj_t obj1, hwloc_obj_t obj2,
1238 float *latency, float *reverse_latency)
1239 {
1240 hwloc_obj_t ancestor;
1241 const struct hwloc_distances_s * distances;
1242 unsigned first_logical ;
1243
1244 if (obj1->depth != obj2->depth) {
1245 errno = EINVAL;
1246 return -1;
1247 }
1248
1249 ancestor = hwloc_get_common_ancestor_obj(topology, obj1, obj2);
1250 distances = hwloc_get_distance_matrix_covering_obj_by_depth(topology, ancestor, obj1->depth, &first_logical);
1251 if (distances && distances->latency) {
1252 const float * latency_matrix = distances->latency;
1253 unsigned nbobjs = distances->nbobjs;
1254 unsigned l1 = obj1->logical_index - first_logical;
1255 unsigned l2 = obj2->logical_index - first_logical;
1256 *latency = latency_matrix[l1*nbobjs+l2];
1257 *reverse_latency = latency_matrix[l2*nbobjs+l1];
1258 return 0;
1259 }
1260
1261 errno = ENOSYS;
1262 return -1;
1263 }
1264
1279 static inline hwloc_obj_t
1280 hwloc_get_non_io_ancestor_obj(hwloc_topology_t topology ,
1281 hwloc_obj_t ioobj)
1282 {
1283 hwloc_obj_t obj = ioobj;
1284 while (obj && !obj->cpuset) {
1285 obj = obj->parent;
1286 }
1287 return obj;
1288 }
1289
1294 static inline hwloc_obj_t
1295 hwloc_get_next_pcidev(hwloc_topology_t topology, hwloc_obj_t prev)
1296 {
1297 return hwloc_get_next_obj_by_type(topology, HWLOC_OBJ_PCI_DEVICE, prev);
1298 }
1299
1303 static inline hwloc_obj_t
1304 hwloc_get_pcidev_by_busid(hwloc_topology_t topology,
1305 unsigned domain, unsigned bus, unsigned dev, unsigned func)
1306 {
1307 hwloc_obj_t obj = NULL;
1308 while ((obj = hwloc_get_next_pcidev(topology, obj)) != NULL) {
1309 if (obj->attr->pcidev.domain == domain
1310 && obj->attr->pcidev.bus == bus
1311 && obj->attr->pcidev.dev == dev
1312 && obj->attr->pcidev.func == func)
1313 return obj;
1314 }
1315 return NULL;
1316 }
1317
1321 static inline hwloc_obj_t
1322 hwloc_get_pcidev_by_busidstring(hwloc_topology_t topology, const char *busid)
1323 {
1324 unsigned domain = 0; /* default */
1325 unsigned bus, dev, func;
1326
1327 if (sscanf(busid, "%x:%x.%x", &bus, &dev, &func) != 3
1328 && sscanf(busid, "%x:%x:%x.%x", &domain, &bus, &dev, &func) != 4) {
1329 errno = EINVAL;
1330 return NULL;
1331 }
1332
1333 return hwloc_get_pcidev_by_busid(topology, domain, bus, dev, func);
1334 }
1335
1340 static inline hwloc_obj_t
1341 hwloc_get_next_osdev(hwloc_topology_t topology, hwloc_obj_t prev)
1342 {
1343 return hwloc_get_next_obj_by_type(topology, HWLOC_OBJ_OS_DEVICE, prev);
1344 }
1345
1350 static inline hwloc_obj_t
1351 hwloc_get_next_bridge(hwloc_topology_t topology, hwloc_obj_t prev)
1352 {
1353 return hwloc_get_next_obj_by_type(topology, HWLOC_OBJ_BRIDGE, prev);
1354 }
1355
1356 /* \brief Checks whether a given bridge covers a given PCI bus.
1357 */
1358 static inline int
1359 hwloc_bridge_covers_pcibus(hwloc_obj_t bridge,
1360 unsigned domain, unsigned bus)
1361 {
1362 return bridge->type == HWLOC_OBJ_BRIDGE
1363 && bridge->attr->bridge.downstream_type == HWLOC_OBJ_BRIDGE_PCI
1364 && bridge->attr->bridge.downstream.pci.domain == domain
1365 && bridge->attr->bridge.downstream.pci.secondary_bus <= bus
1366 && bridge->attr->bridge.downstream.pci.subordinate_bus >= bus;
1367 }
1368
1374 static inline hwloc_obj_t
1375 hwloc_get_hostbridge_by_pcibus(hwloc_topology_t topology,
1376 unsigned domain, unsigned bus)
1377 {
1378 hwloc_obj_t obj = NULL;
1379 while ((obj = hwloc_get_next_bridge(topology, obj)) != NULL) {
1380 if (hwloc_bridge_covers_pcibus(obj, domain, bus)) {
1381 /* found bridge covering this pcibus, make sure it's a hostbridge */
1382 assert(obj->attr->bridge.upstream_type == HWLOC_OBJ_BRIDGE_HOST);
1383 assert(obj->parent->type != HWLOC_OBJ_BRIDGE);
1384 assert(obj->parent->cpuset);
1385 return obj;
1386 }
1387 }
1388 return NULL;
1389 }
1390
1395 #ifdef __cplusplus
1396 } /* extern "C" */
1397 #endif
1398
1399
1400 #endif /* HWLOC_HELPER_H */