2 * Slabinfo: Tool to get reports about slabs
4 * (C) 2007 sgi, Christoph Lameter
8 * gcc -o slabinfo slabinfo.c
12 #include <sys/types.h>
23 #define MAX_ALIASES 500
24 #define MAX_NODES 1024
30 int aliases, align, cache_dma, cpu_slabs, destroy_by_rcu;
31 int hwcache_align, object_size, objs_per_slab;
32 int sanity_checks, slab_size, store_user, trace;
33 int order, poison, reclaim_account, red_zone;
34 unsigned long partial, objects, slabs, objects_partial, objects_total;
35 unsigned long alloc_fastpath, alloc_slowpath;
36 unsigned long free_fastpath, free_slowpath;
37 unsigned long free_frozen, free_add_partial, free_remove_partial;
38 unsigned long alloc_from_partial, alloc_slab, free_slab, alloc_refill;
39 unsigned long cpuslab_flush, deactivate_full, deactivate_empty;
40 unsigned long deactivate_to_head, deactivate_to_tail;
41 unsigned long deactivate_remote_frees, order_fallback;
43 int numa_partial[MAX_NODES];
44 } slabinfo[MAX_SLABS];
49 struct slabinfo *slab;
50 } aliasinfo[MAX_ALIASES];
55 int alias_targets = 0;
67 int show_first_alias = 0;
70 int show_inverted = 0;
71 int show_single_ref = 0;
77 int show_activity = 0;
90 void fatal(const char *x, ...)
95 vfprintf(stderr, x, ap);
102 printf("slabinfo 5/7/2007. (c) 2007 sgi.\n\n"
103 "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
104 "-a|--aliases Show aliases\n"
105 "-A|--activity Most active slabs first\n"
106 "-d<options>|--debug=<options> Set/Clear Debug options\n"
107 "-D|--display-active Switch line format to activity\n"
108 "-e|--empty Show empty slabs\n"
109 "-f|--first-alias Show first alias\n"
110 "-h|--help Show usage information\n"
111 "-i|--inverted Inverted list\n"
112 "-l|--slabs Show slabs\n"
113 "-n|--numa Show NUMA information\n"
114 "-o|--ops Show kmem_cache_ops\n"
115 "-s|--shrink Shrink slabs\n"
116 "-r|--report Detailed report on single slabs\n"
117 "-S|--Size Sort by size\n"
118 "-t|--tracking Show alloc/free information\n"
119 "-T|--Totals Show summary information\n"
120 "-v|--validate Validate slabs\n"
121 "-z|--zero Include empty slabs\n"
122 "-1|--1ref Single reference\n"
123 "\nValid debug options (FZPUT may be combined)\n"
124 "a / A Switch on all debug options (=FZUP)\n"
125 "- Switch off all debug options\n"
126 "f / F Sanity Checks (SLAB_DEBUG_FREE)\n"
134 unsigned long read_obj(const char *name)
136 FILE *f = fopen(name, "r");
141 if (!fgets(buffer, sizeof(buffer), f))
144 if (buffer[strlen(buffer)] == '\n')
145 buffer[strlen(buffer)] = 0;
147 return strlen(buffer);
152 * Get the contents of an attribute
154 unsigned long get_obj(const char *name)
162 unsigned long get_obj_and_str(const char *name, char **x)
164 unsigned long result = 0;
169 if (!read_obj(name)) {
173 result = strtoul(buffer, &p, 10);
181 void set_obj(struct slabinfo *s, const char *name, int n)
186 snprintf(x, 100, "%s/%s", s->name, name);
189 fatal("Cannot write to %s\n", x);
191 fprintf(f, "%d\n", n);
195 unsigned long read_slab_obj(struct slabinfo *s, const char *name)
201 snprintf(x, 100, "%s/%s", s->name, name);
207 l = fread(buffer, 1, sizeof(buffer), f);
216 * Put a size string together
218 int store_size(char *buffer, unsigned long value)
220 unsigned long divisor = 1;
224 if (value > 1000000000UL) {
225 divisor = 100000000UL;
227 } else if (value > 1000000UL) {
230 } else if (value > 1000UL) {
236 n = sprintf(buffer, "%ld",value);
243 memmove(buffer + n - 2, buffer + n - 3, 4);
250 void decode_numa_list(int *numa, char *t)
255 memset(numa, 0, MAX_NODES * sizeof(int));
262 node = strtoul(t, &t, 10);
265 nr = strtoul(t, &t, 10);
267 if (node > highest_node)
275 void slab_validate(struct slabinfo *s)
277 if (strcmp(s->name, "*") == 0)
280 set_obj(s, "validate", 1);
283 void slab_shrink(struct slabinfo *s)
285 if (strcmp(s->name, "*") == 0)
288 set_obj(s, "shrink", 1);
293 void first_line(void)
296 printf("Name Objects Alloc Free %%Fast Fallb O\n");
298 printf("Name Objects Objsize Space "
299 "Slabs/Part/Cpu O/S O %%Fr %%Ef Flg\n");
303 * Find the shortest alias of a slab
305 struct aliasinfo *find_one_alias(struct slabinfo *find)
308 struct aliasinfo *best = NULL;
310 for(a = aliasinfo;a < aliasinfo + aliases; a++) {
311 if (a->slab == find &&
312 (!best || strlen(best->name) < strlen(a->name))) {
314 if (strncmp(a->name,"kmall", 5) == 0)
321 unsigned long slab_size(struct slabinfo *s)
323 return s->slabs * (page_size << s->order);
326 unsigned long slab_activity(struct slabinfo *s)
328 return s->alloc_fastpath + s->free_fastpath +
329 s->alloc_slowpath + s->free_slowpath;
332 void slab_numa(struct slabinfo *s, int mode)
336 if (strcmp(s->name, "*") == 0)
340 printf("\n%s: No NUMA information available.\n", s->name);
344 if (skip_zero && !s->slabs)
348 printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
349 for(node = 0; node <= highest_node; node++)
350 printf(" %4d", node);
351 printf("\n----------------------");
352 for(node = 0; node <= highest_node; node++)
356 printf("%-21s ", mode ? "All slabs" : s->name);
357 for(node = 0; node <= highest_node; node++) {
360 store_size(b, s->numa[node]);
365 printf("%-21s ", "Partial slabs");
366 for(node = 0; node <= highest_node; node++) {
369 store_size(b, s->numa_partial[node]);
377 void show_tracking(struct slabinfo *s)
379 printf("\n%s: Kernel object allocation\n", s->name);
380 printf("-----------------------------------------------------------------------\n");
381 if (read_slab_obj(s, "alloc_calls"))
386 printf("\n%s: Kernel object freeing\n", s->name);
387 printf("------------------------------------------------------------------------\n");
388 if (read_slab_obj(s, "free_calls"))
395 void ops(struct slabinfo *s)
397 if (strcmp(s->name, "*") == 0)
400 if (read_slab_obj(s, "ops")) {
401 printf("\n%s: kmem_cache operations\n", s->name);
402 printf("--------------------------------------------\n");
405 printf("\n%s has no kmem_cache operations\n", s->name);
408 const char *onoff(int x)
415 void slab_stats(struct slabinfo *s)
417 unsigned long total_alloc;
418 unsigned long total_free;
424 total_alloc = s->alloc_fastpath + s->alloc_slowpath;
425 total_free = s->free_fastpath + s->free_slowpath;
431 printf("Slab Perf Counter Alloc Free %%Al %%Fr\n");
432 printf("--------------------------------------------------\n");
433 printf("Fastpath %8lu %8lu %3lu %3lu\n",
434 s->alloc_fastpath, s->free_fastpath,
435 s->alloc_fastpath * 100 / total_alloc,
436 s->free_fastpath * 100 / total_free);
437 printf("Slowpath %8lu %8lu %3lu %3lu\n",
438 total_alloc - s->alloc_fastpath, s->free_slowpath,
439 (total_alloc - s->alloc_fastpath) * 100 / total_alloc,
440 s->free_slowpath * 100 / total_free);
441 printf("Page Alloc %8lu %8lu %3lu %3lu\n",
442 s->alloc_slab, s->free_slab,
443 s->alloc_slab * 100 / total_alloc,
444 s->free_slab * 100 / total_free);
445 printf("Add partial %8lu %8lu %3lu %3lu\n",
446 s->deactivate_to_head + s->deactivate_to_tail,
448 (s->deactivate_to_head + s->deactivate_to_tail) * 100 / total_alloc,
449 s->free_add_partial * 100 / total_free);
450 printf("Remove partial %8lu %8lu %3lu %3lu\n",
451 s->alloc_from_partial, s->free_remove_partial,
452 s->alloc_from_partial * 100 / total_alloc,
453 s->free_remove_partial * 100 / total_free);
455 printf("RemoteObj/SlabFrozen %8lu %8lu %3lu %3lu\n",
456 s->deactivate_remote_frees, s->free_frozen,
457 s->deactivate_remote_frees * 100 / total_alloc,
458 s->free_frozen * 100 / total_free);
460 printf("Total %8lu %8lu\n\n", total_alloc, total_free);
462 if (s->cpuslab_flush)
463 printf("Flushes %8lu\n", s->cpuslab_flush);
466 printf("Refill %8lu\n", s->alloc_refill);
468 total = s->deactivate_full + s->deactivate_empty +
469 s->deactivate_to_head + s->deactivate_to_tail;
472 printf("Deactivate Full=%lu(%lu%%) Empty=%lu(%lu%%) "
473 "ToHead=%lu(%lu%%) ToTail=%lu(%lu%%)\n",
474 s->deactivate_full, (s->deactivate_full * 100) / total,
475 s->deactivate_empty, (s->deactivate_empty * 100) / total,
476 s->deactivate_to_head, (s->deactivate_to_head * 100) / total,
477 s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total);
480 void report(struct slabinfo *s)
482 if (strcmp(s->name, "*") == 0)
485 printf("\nSlabcache: %-20s Aliases: %2d Order : %2d Objects: %lu\n",
486 s->name, s->aliases, s->order, s->objects);
487 if (s->hwcache_align)
488 printf("** Hardware cacheline aligned\n");
490 printf("** Memory is allocated in a special DMA zone\n");
491 if (s->destroy_by_rcu)
492 printf("** Slabs are destroyed via RCU\n");
493 if (s->reclaim_account)
494 printf("** Reclaim accounting active\n");
496 printf("\nSizes (bytes) Slabs Debug Memory\n");
497 printf("------------------------------------------------------------------------\n");
498 printf("Object : %7d Total : %7ld Sanity Checks : %s Total: %7ld\n",
499 s->object_size, s->slabs, onoff(s->sanity_checks),
500 s->slabs * (page_size << s->order));
501 printf("SlabObj: %7d Full : %7ld Redzoning : %s Used : %7ld\n",
502 s->slab_size, s->slabs - s->partial - s->cpu_slabs,
503 onoff(s->red_zone), s->objects * s->object_size);
504 printf("SlabSiz: %7d Partial: %7ld Poisoning : %s Loss : %7ld\n",
505 page_size << s->order, s->partial, onoff(s->poison),
506 s->slabs * (page_size << s->order) - s->objects * s->object_size);
507 printf("Loss : %7d CpuSlab: %7d Tracking : %s Lalig: %7ld\n",
508 s->slab_size - s->object_size, s->cpu_slabs, onoff(s->store_user),
509 (s->slab_size - s->object_size) * s->objects);
510 printf("Align : %7d Objects: %7d Tracing : %s Lpadd: %7ld\n",
511 s->align, s->objs_per_slab, onoff(s->trace),
512 ((page_size << s->order) - s->objs_per_slab * s->slab_size) *
521 void slabcache(struct slabinfo *s)
528 if (strcmp(s->name, "*") == 0)
531 if (actual_slabs == 1) {
536 if (skip_zero && !show_empty && !s->slabs)
539 if (show_empty && s->slabs)
542 store_size(size_str, slab_size(s));
543 snprintf(dist_str, 40, "%lu/%lu/%d", s->slabs - s->cpu_slabs,
544 s->partial, s->cpu_slabs);
553 if (s->hwcache_align)
557 if (s->reclaim_account)
561 if (s->sanity_checks)
570 unsigned long total_alloc;
571 unsigned long total_free;
573 total_alloc = s->alloc_fastpath + s->alloc_slowpath;
574 total_free = s->free_fastpath + s->free_slowpath;
576 printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d\n",
578 total_alloc, total_free,
579 total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,
580 total_free ? (s->free_fastpath * 100 / total_free) : 0,
581 s->order_fallback, s->order);
584 printf("%-21s %8ld %7d %8s %14s %4d %1d %3ld %3ld %s\n",
585 s->name, s->objects, s->object_size, size_str, dist_str,
586 s->objs_per_slab, s->order,
587 s->slabs ? (s->partial * 100) / s->slabs : 100,
588 s->slabs ? (s->objects * s->object_size * 100) /
589 (s->slabs * (page_size << s->order)) : 100,
594 * Analyze debug options. Return false if something is amiss.
596 int debug_opt_scan(char *opt)
598 if (!opt || !opt[0] || strcmp(opt, "-") == 0)
601 if (strcasecmp(opt, "a") == 0) {
645 int slab_empty(struct slabinfo *s)
651 * We may still have slabs even if there are no objects. Shrinking will
655 set_obj(s, "shrink", 1);
660 void slab_debug(struct slabinfo *s)
662 if (strcmp(s->name, "*") == 0)
665 if (sanity && !s->sanity_checks) {
666 set_obj(s, "sanity", 1);
668 if (!sanity && s->sanity_checks) {
670 set_obj(s, "sanity", 0);
672 fprintf(stderr, "%s not empty cannot disable sanity checks\n", s->name);
674 if (redzone && !s->red_zone) {
676 set_obj(s, "red_zone", 1);
678 fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
680 if (!redzone && s->red_zone) {
682 set_obj(s, "red_zone", 0);
684 fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
686 if (poison && !s->poison) {
688 set_obj(s, "poison", 1);
690 fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
692 if (!poison && s->poison) {
694 set_obj(s, "poison", 0);
696 fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
698 if (tracking && !s->store_user) {
700 set_obj(s, "store_user", 1);
702 fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
704 if (!tracking && s->store_user) {
706 set_obj(s, "store_user", 0);
708 fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
710 if (tracing && !s->trace) {
712 set_obj(s, "trace", 1);
714 fprintf(stderr, "%s can only enable trace for one slab at a time\n", s->name);
716 if (!tracing && s->trace)
717 set_obj(s, "trace", 1);
725 char b1[20], b2[20], b3[20], b4[20];
726 unsigned long long max = 1ULL << 63;
729 unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
731 /* Number of partial slabs in a slabcache */
732 unsigned long long min_partial = max, max_partial = 0,
733 avg_partial, total_partial = 0;
735 /* Number of slabs in a slab cache */
736 unsigned long long min_slabs = max, max_slabs = 0,
737 avg_slabs, total_slabs = 0;
739 /* Size of the whole slab */
740 unsigned long long min_size = max, max_size = 0,
741 avg_size, total_size = 0;
743 /* Bytes used for object storage in a slab */
744 unsigned long long min_used = max, max_used = 0,
745 avg_used, total_used = 0;
747 /* Waste: Bytes used for alignment and padding */
748 unsigned long long min_waste = max, max_waste = 0,
749 avg_waste, total_waste = 0;
750 /* Number of objects in a slab */
751 unsigned long long min_objects = max, max_objects = 0,
752 avg_objects, total_objects = 0;
753 /* Waste per object */
754 unsigned long long min_objwaste = max,
755 max_objwaste = 0, avg_objwaste,
758 /* Memory per object */
759 unsigned long long min_memobj = max,
760 max_memobj = 0, avg_memobj,
763 /* Percentage of partial slabs per slab */
764 unsigned long min_ppart = 100, max_ppart = 0,
765 avg_ppart, total_ppart = 0;
767 /* Number of objects in partial slabs */
768 unsigned long min_partobj = max, max_partobj = 0,
769 avg_partobj, total_partobj = 0;
771 /* Percentage of partial objects of all objects in a slab */
772 unsigned long min_ppartobj = 100, max_ppartobj = 0,
773 avg_ppartobj, total_ppartobj = 0;
776 for (s = slabinfo; s < slabinfo + slabs; s++) {
777 unsigned long long size;
779 unsigned long long wasted;
780 unsigned long long objwaste;
781 unsigned long percentage_partial_slabs;
782 unsigned long percentage_partial_objs;
784 if (!s->slabs || !s->objects)
790 used = s->objects * s->object_size;
791 wasted = size - used;
792 objwaste = s->slab_size - s->object_size;
794 percentage_partial_slabs = s->partial * 100 / s->slabs;
795 if (percentage_partial_slabs > 100)
796 percentage_partial_slabs = 100;
798 percentage_partial_objs = s->objects_partial * 100
801 if (percentage_partial_objs > 100)
802 percentage_partial_objs = 100;
804 if (s->object_size < min_objsize)
805 min_objsize = s->object_size;
806 if (s->partial < min_partial)
807 min_partial = s->partial;
808 if (s->slabs < min_slabs)
809 min_slabs = s->slabs;
812 if (wasted < min_waste)
814 if (objwaste < min_objwaste)
815 min_objwaste = objwaste;
816 if (s->objects < min_objects)
817 min_objects = s->objects;
820 if (s->objects_partial < min_partobj)
821 min_partobj = s->objects_partial;
822 if (percentage_partial_slabs < min_ppart)
823 min_ppart = percentage_partial_slabs;
824 if (percentage_partial_objs < min_ppartobj)
825 min_ppartobj = percentage_partial_objs;
826 if (s->slab_size < min_memobj)
827 min_memobj = s->slab_size;
829 if (s->object_size > max_objsize)
830 max_objsize = s->object_size;
831 if (s->partial > max_partial)
832 max_partial = s->partial;
833 if (s->slabs > max_slabs)
834 max_slabs = s->slabs;
837 if (wasted > max_waste)
839 if (objwaste > max_objwaste)
840 max_objwaste = objwaste;
841 if (s->objects > max_objects)
842 max_objects = s->objects;
845 if (s->objects_partial > max_partobj)
846 max_partobj = s->objects_partial;
847 if (percentage_partial_slabs > max_ppart)
848 max_ppart = percentage_partial_slabs;
849 if (percentage_partial_objs > max_ppartobj)
850 max_ppartobj = percentage_partial_objs;
851 if (s->slab_size > max_memobj)
852 max_memobj = s->slab_size;
854 total_partial += s->partial;
855 total_slabs += s->slabs;
857 total_waste += wasted;
859 total_objects += s->objects;
861 total_partobj += s->objects_partial;
862 total_ppart += percentage_partial_slabs;
863 total_ppartobj += percentage_partial_objs;
865 total_objwaste += s->objects * objwaste;
866 total_objsize += s->objects * s->slab_size;
869 if (!total_objects) {
870 printf("No objects\n");
874 printf("No slabs\n");
878 /* Per slab averages */
879 avg_partial = total_partial / used_slabs;
880 avg_slabs = total_slabs / used_slabs;
881 avg_size = total_size / used_slabs;
882 avg_waste = total_waste / used_slabs;
884 avg_objects = total_objects / used_slabs;
885 avg_used = total_used / used_slabs;
886 avg_partobj = total_partobj / used_slabs;
887 avg_ppart = total_ppart / used_slabs;
888 avg_ppartobj = total_ppartobj / used_slabs;
890 /* Per object object sizes */
891 avg_objsize = total_used / total_objects;
892 avg_objwaste = total_objwaste / total_objects;
893 avg_partobj = total_partobj * 100 / total_objects;
894 avg_memobj = total_objsize / total_objects;
896 printf("Slabcache Totals\n");
897 printf("----------------\n");
898 printf("Slabcaches : %3d Aliases : %3d->%-3d Active: %3d\n",
899 slabs, aliases, alias_targets, used_slabs);
901 store_size(b1, total_size);store_size(b2, total_waste);
902 store_size(b3, total_waste * 100 / total_used);
903 printf("Memory used: %6s # Loss : %6s MRatio:%6s%%\n", b1, b2, b3);
905 store_size(b1, total_objects);store_size(b2, total_partobj);
906 store_size(b3, total_partobj * 100 / total_objects);
907 printf("# Objects : %6s # PartObj: %6s ORatio:%6s%%\n", b1, b2, b3);
910 printf("Per Cache Average Min Max Total\n");
911 printf("---------------------------------------------------------\n");
913 store_size(b1, avg_objects);store_size(b2, min_objects);
914 store_size(b3, max_objects);store_size(b4, total_objects);
915 printf("#Objects %10s %10s %10s %10s\n",
918 store_size(b1, avg_slabs);store_size(b2, min_slabs);
919 store_size(b3, max_slabs);store_size(b4, total_slabs);
920 printf("#Slabs %10s %10s %10s %10s\n",
923 store_size(b1, avg_partial);store_size(b2, min_partial);
924 store_size(b3, max_partial);store_size(b4, total_partial);
925 printf("#PartSlab %10s %10s %10s %10s\n",
927 store_size(b1, avg_ppart);store_size(b2, min_ppart);
928 store_size(b3, max_ppart);
929 store_size(b4, total_partial * 100 / total_slabs);
930 printf("%%PartSlab%10s%% %10s%% %10s%% %10s%%\n",
933 store_size(b1, avg_partobj);store_size(b2, min_partobj);
934 store_size(b3, max_partobj);
935 store_size(b4, total_partobj);
936 printf("PartObjs %10s %10s %10s %10s\n",
939 store_size(b1, avg_ppartobj);store_size(b2, min_ppartobj);
940 store_size(b3, max_ppartobj);
941 store_size(b4, total_partobj * 100 / total_objects);
942 printf("%% PartObj%10s%% %10s%% %10s%% %10s%%\n",
945 store_size(b1, avg_size);store_size(b2, min_size);
946 store_size(b3, max_size);store_size(b4, total_size);
947 printf("Memory %10s %10s %10s %10s\n",
950 store_size(b1, avg_used);store_size(b2, min_used);
951 store_size(b3, max_used);store_size(b4, total_used);
952 printf("Used %10s %10s %10s %10s\n",
955 store_size(b1, avg_waste);store_size(b2, min_waste);
956 store_size(b3, max_waste);store_size(b4, total_waste);
957 printf("Loss %10s %10s %10s %10s\n",
961 printf("Per Object Average Min Max\n");
962 printf("---------------------------------------------\n");
964 store_size(b1, avg_memobj);store_size(b2, min_memobj);
965 store_size(b3, max_memobj);
966 printf("Memory %10s %10s %10s\n",
968 store_size(b1, avg_objsize);store_size(b2, min_objsize);
969 store_size(b3, max_objsize);
970 printf("User %10s %10s %10s\n",
973 store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
974 store_size(b3, max_objwaste);
975 printf("Loss %10s %10s %10s\n",
979 void sort_slabs(void)
981 struct slabinfo *s1,*s2;
983 for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
984 for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
988 result = slab_size(s1) < slab_size(s2);
989 else if (sort_active)
990 result = slab_activity(s1) < slab_activity(s2);
992 result = strcasecmp(s1->name, s2->name);
1000 memcpy(&t, s1, sizeof(struct slabinfo));
1001 memcpy(s1, s2, sizeof(struct slabinfo));
1002 memcpy(s2, &t, sizeof(struct slabinfo));
1008 void sort_aliases(void)
1010 struct aliasinfo *a1,*a2;
1012 for (a1 = aliasinfo; a1 < aliasinfo + aliases; a1++) {
1013 for (a2 = a1 + 1; a2 < aliasinfo + aliases; a2++) {
1018 if (show_alias && !show_inverted) {
1022 if (strcasecmp(n1, n2) > 0) {
1025 memcpy(&t, a1, sizeof(struct aliasinfo));
1026 memcpy(a1, a2, sizeof(struct aliasinfo));
1027 memcpy(a2, &t, sizeof(struct aliasinfo));
1033 void link_slabs(void)
1035 struct aliasinfo *a;
1038 for (a = aliasinfo; a < aliasinfo + aliases; a++) {
1040 for (s = slabinfo; s < slabinfo + slabs; s++)
1041 if (strcmp(a->ref, s->name) == 0) {
1046 if (s == slabinfo + slabs)
1047 fatal("Unresolved alias %s\n", a->ref);
1053 struct aliasinfo *a;
1054 char *active = NULL;
1059 for(a = aliasinfo; a < aliasinfo + aliases; a++) {
1061 if (!show_single_ref && a->slab->refs == 1)
1064 if (!show_inverted) {
1066 if (strcmp(a->slab->name, active) == 0) {
1067 printf(" %s", a->name);
1071 printf("\n%-12s <- %s", a->slab->name, a->name);
1072 active = a->slab->name;
1075 printf("%-20s -> %s\n", a->name, a->slab->name);
1082 void rename_slabs(void)
1085 struct aliasinfo *a;
1087 for (s = slabinfo; s < slabinfo + slabs; s++) {
1088 if (*s->name != ':')
1091 if (s->refs > 1 && !show_first_alias)
1094 a = find_one_alias(s);
1105 int slab_mismatch(char *slab)
1107 return regexec(&pattern, slab, 0, NULL, 0);
1110 void read_slab_dir(void)
1114 struct slabinfo *slab = slabinfo;
1115 struct aliasinfo *alias = aliasinfo;
1120 if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
1121 fatal("SYSFS support for SLUB not active\n");
1124 while ((de = readdir(dir))) {
1125 if (de->d_name[0] == '.' ||
1126 (de->d_name[0] != ':' && slab_mismatch(de->d_name)))
1128 switch (de->d_type) {
1130 alias->name = strdup(de->d_name);
1131 count = readlink(de->d_name, buffer, sizeof(buffer));
1134 fatal("Cannot read symlink %s\n", de->d_name);
1138 while (p > buffer && p[-1] != '/')
1140 alias->ref = strdup(p);
1144 if (chdir(de->d_name))
1145 fatal("Unable to access slab %s\n", slab->name);
1146 slab->name = strdup(de->d_name);
1149 slab->aliases = get_obj("aliases");
1150 slab->align = get_obj("align");
1151 slab->cache_dma = get_obj("cache_dma");
1152 slab->cpu_slabs = get_obj("cpu_slabs");
1153 slab->destroy_by_rcu = get_obj("destroy_by_rcu");
1154 slab->hwcache_align = get_obj("hwcache_align");
1155 slab->object_size = get_obj("object_size");
1156 slab->objects = get_obj("objects");
1157 slab->objects_partial = get_obj("objects_partial");
1158 slab->objects_total = get_obj("objects_total");
1159 slab->objs_per_slab = get_obj("objs_per_slab");
1160 slab->order = get_obj("order");
1161 slab->partial = get_obj("partial");
1162 slab->partial = get_obj_and_str("partial", &t);
1163 decode_numa_list(slab->numa_partial, t);
1165 slab->poison = get_obj("poison");
1166 slab->reclaim_account = get_obj("reclaim_account");
1167 slab->red_zone = get_obj("red_zone");
1168 slab->sanity_checks = get_obj("sanity_checks");
1169 slab->slab_size = get_obj("slab_size");
1170 slab->slabs = get_obj_and_str("slabs", &t);
1171 decode_numa_list(slab->numa, t);
1173 slab->store_user = get_obj("store_user");
1174 slab->trace = get_obj("trace");
1175 slab->alloc_fastpath = get_obj("alloc_fastpath");
1176 slab->alloc_slowpath = get_obj("alloc_slowpath");
1177 slab->free_fastpath = get_obj("free_fastpath");
1178 slab->free_slowpath = get_obj("free_slowpath");
1179 slab->free_frozen= get_obj("free_frozen");
1180 slab->free_add_partial = get_obj("free_add_partial");
1181 slab->free_remove_partial = get_obj("free_remove_partial");
1182 slab->alloc_from_partial = get_obj("alloc_from_partial");
1183 slab->alloc_slab = get_obj("alloc_slab");
1184 slab->alloc_refill = get_obj("alloc_refill");
1185 slab->free_slab = get_obj("free_slab");
1186 slab->cpuslab_flush = get_obj("cpuslab_flush");
1187 slab->deactivate_full = get_obj("deactivate_full");
1188 slab->deactivate_empty = get_obj("deactivate_empty");
1189 slab->deactivate_to_head = get_obj("deactivate_to_head");
1190 slab->deactivate_to_tail = get_obj("deactivate_to_tail");
1191 slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
1192 slab->order_fallback = get_obj("order_fallback");
1194 if (slab->name[0] == ':')
1199 fatal("Unknown file type %lx\n", de->d_type);
1203 slabs = slab - slabinfo;
1204 actual_slabs = slabs;
1205 aliases = alias - aliasinfo;
1206 if (slabs > MAX_SLABS)
1207 fatal("Too many slabs\n");
1208 if (aliases > MAX_ALIASES)
1209 fatal("Too many aliases\n");
1212 void output_slabs(void)
1214 struct slabinfo *slab;
1216 for (slab = slabinfo; slab < slabinfo + slabs; slab++) {
1224 else if (show_track)
1225 show_tracking(slab);
1227 slab_validate(slab);
1236 else if (show_report)
1241 struct option opts[] = {
1242 { "aliases", 0, NULL, 'a' },
1243 { "activity", 0, NULL, 'A' },
1244 { "debug", 2, NULL, 'd' },
1245 { "display-activity", 0, NULL, 'D' },
1246 { "empty", 0, NULL, 'e' },
1247 { "first-alias", 0, NULL, 'f' },
1248 { "help", 0, NULL, 'h' },
1249 { "inverted", 0, NULL, 'i'},
1250 { "numa", 0, NULL, 'n' },
1251 { "ops", 0, NULL, 'o' },
1252 { "report", 0, NULL, 'r' },
1253 { "shrink", 0, NULL, 's' },
1254 { "slabs", 0, NULL, 'l' },
1255 { "track", 0, NULL, 't'},
1256 { "validate", 0, NULL, 'v' },
1257 { "zero", 0, NULL, 'z' },
1258 { "1ref", 0, NULL, '1'},
1259 { NULL, 0, NULL, 0 }
1262 int main(int argc, char *argv[])
1266 char *pattern_source;
1268 page_size = getpagesize();
1270 while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTS",
1274 show_single_ref = 1;
1284 if (!debug_opt_scan(optarg))
1285 fatal("Invalid debug option '%s'\n", optarg);
1294 show_first_alias = 1;
1334 fatal("%s: Invalid option '%c'\n", argv[0], optopt);
1338 if (!show_slab && !show_alias && !show_track && !show_report
1339 && !validate && !shrink && !set_debug && !show_ops)
1343 pattern_source = argv[optind];
1345 pattern_source = ".*";
1347 err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
1349 fatal("%s: Invalid pattern '%s' code %d\n",
1350 argv[0], pattern_source, err);