2 * Slabinfo: Tool to get reports about slabs
4 * (C) 2007 sgi, Christoph Lameter
5 * (C) 2011 Linux Foundation, Christoph Lameter
9 * gcc -o slabinfo slabinfo.c
13 #include <sys/types.h>
24 #define MAX_ALIASES 500
25 #define MAX_NODES 1024
31 int aliases, align, cache_dma, cpu_slabs, destroy_by_rcu;
32 int hwcache_align, object_size, objs_per_slab;
33 int sanity_checks, slab_size, store_user, trace;
34 int order, poison, reclaim_account, red_zone;
35 unsigned long partial, objects, slabs, objects_partial, objects_total;
36 unsigned long alloc_fastpath, alloc_slowpath;
37 unsigned long free_fastpath, free_slowpath;
38 unsigned long free_frozen, free_add_partial, free_remove_partial;
39 unsigned long alloc_from_partial, alloc_slab, free_slab, alloc_refill;
40 unsigned long cpuslab_flush, deactivate_full, deactivate_empty;
41 unsigned long deactivate_to_head, deactivate_to_tail;
42 unsigned long deactivate_remote_frees, order_fallback;
43 unsigned long cmpxchg_double_cpu_fail, cmpxchg_double_fail;
44 unsigned long alloc_node_mismatch, deactivate_bypass;
46 int numa_partial[MAX_NODES];
47 } slabinfo[MAX_SLABS];
52 struct slabinfo *slab;
53 } aliasinfo[MAX_ALIASES];
58 int alias_targets = 0;
70 int show_first_alias = 0;
73 int show_inverted = 0;
74 int show_single_ref = 0;
80 int show_activity = 0;
93 static void fatal(const char *x, ...)
98 vfprintf(stderr, x, ap);
103 static void usage(void)
105 printf("slabinfo 4/15/2011. (c) 2007 sgi/(c) 2011 Linux Foundation.\n\n"
106 "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
107 "-a|--aliases Show aliases\n"
108 "-A|--activity Most active slabs first\n"
109 "-d<options>|--debug=<options> Set/Clear Debug options\n"
110 "-D|--display-active Switch line format to activity\n"
111 "-e|--empty Show empty slabs\n"
112 "-f|--first-alias Show first alias\n"
113 "-h|--help Show usage information\n"
114 "-i|--inverted Inverted list\n"
115 "-l|--slabs Show slabs\n"
116 "-n|--numa Show NUMA information\n"
117 "-o|--ops Show kmem_cache_ops\n"
118 "-s|--shrink Shrink slabs\n"
119 "-r|--report Detailed report on single slabs\n"
120 "-S|--Size Sort by size\n"
121 "-t|--tracking Show alloc/free information\n"
122 "-T|--Totals Show summary information\n"
123 "-v|--validate Validate slabs\n"
124 "-z|--zero Include empty slabs\n"
125 "-1|--1ref Single reference\n"
126 "\nValid debug options (FZPUT may be combined)\n"
127 "a / A Switch on all debug options (=FZUP)\n"
128 "- Switch off all debug options\n"
129 "f / F Sanity Checks (SLAB_DEBUG_FREE)\n"
137 static unsigned long read_obj(const char *name)
139 FILE *f = fopen(name, "r");
144 if (!fgets(buffer, sizeof(buffer), f))
147 if (buffer[strlen(buffer)] == '\n')
148 buffer[strlen(buffer)] = 0;
150 return strlen(buffer);
155 * Get the contents of an attribute
157 static unsigned long get_obj(const char *name)
165 static unsigned long get_obj_and_str(const char *name, char **x)
167 unsigned long result = 0;
172 if (!read_obj(name)) {
176 result = strtoul(buffer, &p, 10);
184 static void set_obj(struct slabinfo *s, const char *name, int n)
189 snprintf(x, 100, "%s/%s", s->name, name);
192 fatal("Cannot write to %s\n", x);
194 fprintf(f, "%d\n", n);
198 static unsigned long read_slab_obj(struct slabinfo *s, const char *name)
204 snprintf(x, 100, "%s/%s", s->name, name);
210 l = fread(buffer, 1, sizeof(buffer), f);
219 * Put a size string together
221 static int store_size(char *buffer, unsigned long value)
223 unsigned long divisor = 1;
227 if (value > 1000000000UL) {
228 divisor = 100000000UL;
230 } else if (value > 1000000UL) {
233 } else if (value > 1000UL) {
239 n = sprintf(buffer, "%ld",value);
246 memmove(buffer + n - 2, buffer + n - 3, 4);
253 static void decode_numa_list(int *numa, char *t)
258 memset(numa, 0, MAX_NODES * sizeof(int));
265 node = strtoul(t, &t, 10);
268 nr = strtoul(t, &t, 10);
270 if (node > highest_node)
278 static void slab_validate(struct slabinfo *s)
280 if (strcmp(s->name, "*") == 0)
283 set_obj(s, "validate", 1);
286 static void slab_shrink(struct slabinfo *s)
288 if (strcmp(s->name, "*") == 0)
291 set_obj(s, "shrink", 1);
296 static void first_line(void)
299 printf("Name Objects Alloc Free %%Fast Fallb O CmpX UL\n");
301 printf("Name Objects Objsize Space "
302 "Slabs/Part/Cpu O/S O %%Fr %%Ef Flg\n");
306 * Find the shortest alias of a slab
308 static struct aliasinfo *find_one_alias(struct slabinfo *find)
311 struct aliasinfo *best = NULL;
313 for(a = aliasinfo;a < aliasinfo + aliases; a++) {
314 if (a->slab == find &&
315 (!best || strlen(best->name) < strlen(a->name))) {
317 if (strncmp(a->name,"kmall", 5) == 0)
324 static unsigned long slab_size(struct slabinfo *s)
326 return s->slabs * (page_size << s->order);
329 static unsigned long slab_activity(struct slabinfo *s)
331 return s->alloc_fastpath + s->free_fastpath +
332 s->alloc_slowpath + s->free_slowpath;
335 static void slab_numa(struct slabinfo *s, int mode)
339 if (strcmp(s->name, "*") == 0)
343 printf("\n%s: No NUMA information available.\n", s->name);
347 if (skip_zero && !s->slabs)
351 printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
352 for(node = 0; node <= highest_node; node++)
353 printf(" %4d", node);
354 printf("\n----------------------");
355 for(node = 0; node <= highest_node; node++)
359 printf("%-21s ", mode ? "All slabs" : s->name);
360 for(node = 0; node <= highest_node; node++) {
363 store_size(b, s->numa[node]);
368 printf("%-21s ", "Partial slabs");
369 for(node = 0; node <= highest_node; node++) {
372 store_size(b, s->numa_partial[node]);
380 static void show_tracking(struct slabinfo *s)
382 printf("\n%s: Kernel object allocation\n", s->name);
383 printf("-----------------------------------------------------------------------\n");
384 if (read_slab_obj(s, "alloc_calls"))
385 printf("%s", buffer);
389 printf("\n%s: Kernel object freeing\n", s->name);
390 printf("------------------------------------------------------------------------\n");
391 if (read_slab_obj(s, "free_calls"))
392 printf("%s", buffer);
398 static void ops(struct slabinfo *s)
400 if (strcmp(s->name, "*") == 0)
403 if (read_slab_obj(s, "ops")) {
404 printf("\n%s: kmem_cache operations\n", s->name);
405 printf("--------------------------------------------\n");
406 printf("%s", buffer);
408 printf("\n%s has no kmem_cache operations\n", s->name);
411 static const char *onoff(int x)
418 static void slab_stats(struct slabinfo *s)
420 unsigned long total_alloc;
421 unsigned long total_free;
427 total_alloc = s->alloc_fastpath + s->alloc_slowpath;
428 total_free = s->free_fastpath + s->free_slowpath;
434 printf("Slab Perf Counter Alloc Free %%Al %%Fr\n");
435 printf("--------------------------------------------------\n");
436 printf("Fastpath %8lu %8lu %3lu %3lu\n",
437 s->alloc_fastpath, s->free_fastpath,
438 s->alloc_fastpath * 100 / total_alloc,
439 s->free_fastpath * 100 / total_free);
440 printf("Slowpath %8lu %8lu %3lu %3lu\n",
441 total_alloc - s->alloc_fastpath, s->free_slowpath,
442 (total_alloc - s->alloc_fastpath) * 100 / total_alloc,
443 s->free_slowpath * 100 / total_free);
444 printf("Page Alloc %8lu %8lu %3lu %3lu\n",
445 s->alloc_slab, s->free_slab,
446 s->alloc_slab * 100 / total_alloc,
447 s->free_slab * 100 / total_free);
448 printf("Add partial %8lu %8lu %3lu %3lu\n",
449 s->deactivate_to_head + s->deactivate_to_tail,
451 (s->deactivate_to_head + s->deactivate_to_tail) * 100 / total_alloc,
452 s->free_add_partial * 100 / total_free);
453 printf("Remove partial %8lu %8lu %3lu %3lu\n",
454 s->alloc_from_partial, s->free_remove_partial,
455 s->alloc_from_partial * 100 / total_alloc,
456 s->free_remove_partial * 100 / total_free);
458 printf("RemoteObj/SlabFrozen %8lu %8lu %3lu %3lu\n",
459 s->deactivate_remote_frees, s->free_frozen,
460 s->deactivate_remote_frees * 100 / total_alloc,
461 s->free_frozen * 100 / total_free);
463 printf("Total %8lu %8lu\n\n", total_alloc, total_free);
465 if (s->cpuslab_flush)
466 printf("Flushes %8lu\n", s->cpuslab_flush);
468 total = s->deactivate_full + s->deactivate_empty +
469 s->deactivate_to_head + s->deactivate_to_tail + s->deactivate_bypass;
472 printf("\nSlab Deactivation Ocurrences %%\n");
473 printf("-------------------------------------------------\n");
474 printf("Slab full %7lu %3lu%%\n",
475 s->deactivate_full, (s->deactivate_full * 100) / total);
476 printf("Slab empty %7lu %3lu%%\n",
477 s->deactivate_empty, (s->deactivate_empty * 100) / total);
478 printf("Moved to head of partial list %7lu %3lu%%\n",
479 s->deactivate_to_head, (s->deactivate_to_head * 100) / total);
480 printf("Moved to tail of partial list %7lu %3lu%%\n",
481 s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total);
482 printf("Deactivation bypass %7lu %3lu%%\n",
483 s->deactivate_bypass, (s->deactivate_bypass * 100) / total);
484 printf("Refilled from foreign frees %7lu %3lu%%\n",
485 s->alloc_refill, (s->alloc_refill * 100) / total);
486 printf("Node mismatch %7lu %3lu%%\n",
487 s->alloc_node_mismatch, (s->alloc_node_mismatch * 100) / total);
490 if (s->cmpxchg_double_fail || s->cmpxchg_double_cpu_fail)
491 printf("\nCmpxchg_double Looping\n------------------------\n");
492 printf("Locked Cmpxchg Double redos %lu\nUnlocked Cmpxchg Double redos %lu\n",
493 s->cmpxchg_double_fail, s->cmpxchg_double_cpu_fail);
496 static void report(struct slabinfo *s)
498 if (strcmp(s->name, "*") == 0)
501 printf("\nSlabcache: %-20s Aliases: %2d Order : %2d Objects: %lu\n",
502 s->name, s->aliases, s->order, s->objects);
503 if (s->hwcache_align)
504 printf("** Hardware cacheline aligned\n");
506 printf("** Memory is allocated in a special DMA zone\n");
507 if (s->destroy_by_rcu)
508 printf("** Slabs are destroyed via RCU\n");
509 if (s->reclaim_account)
510 printf("** Reclaim accounting active\n");
512 printf("\nSizes (bytes) Slabs Debug Memory\n");
513 printf("------------------------------------------------------------------------\n");
514 printf("Object : %7d Total : %7ld Sanity Checks : %s Total: %7ld\n",
515 s->object_size, s->slabs, onoff(s->sanity_checks),
516 s->slabs * (page_size << s->order));
517 printf("SlabObj: %7d Full : %7ld Redzoning : %s Used : %7ld\n",
518 s->slab_size, s->slabs - s->partial - s->cpu_slabs,
519 onoff(s->red_zone), s->objects * s->object_size);
520 printf("SlabSiz: %7d Partial: %7ld Poisoning : %s Loss : %7ld\n",
521 page_size << s->order, s->partial, onoff(s->poison),
522 s->slabs * (page_size << s->order) - s->objects * s->object_size);
523 printf("Loss : %7d CpuSlab: %7d Tracking : %s Lalig: %7ld\n",
524 s->slab_size - s->object_size, s->cpu_slabs, onoff(s->store_user),
525 (s->slab_size - s->object_size) * s->objects);
526 printf("Align : %7d Objects: %7d Tracing : %s Lpadd: %7ld\n",
527 s->align, s->objs_per_slab, onoff(s->trace),
528 ((page_size << s->order) - s->objs_per_slab * s->slab_size) *
537 static void slabcache(struct slabinfo *s)
544 if (strcmp(s->name, "*") == 0)
547 if (actual_slabs == 1) {
552 if (skip_zero && !show_empty && !s->slabs)
555 if (show_empty && s->slabs)
558 store_size(size_str, slab_size(s));
559 snprintf(dist_str, 40, "%lu/%lu/%d", s->slabs - s->cpu_slabs,
560 s->partial, s->cpu_slabs);
569 if (s->hwcache_align)
573 if (s->reclaim_account)
577 if (s->sanity_checks)
586 unsigned long total_alloc;
587 unsigned long total_free;
589 total_alloc = s->alloc_fastpath + s->alloc_slowpath;
590 total_free = s->free_fastpath + s->free_slowpath;
592 printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d %4ld %4ld\n",
594 total_alloc, total_free,
595 total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,
596 total_free ? (s->free_fastpath * 100 / total_free) : 0,
597 s->order_fallback, s->order, s->cmpxchg_double_fail,
598 s->cmpxchg_double_cpu_fail);
601 printf("%-21s %8ld %7d %8s %14s %4d %1d %3ld %3ld %s\n",
602 s->name, s->objects, s->object_size, size_str, dist_str,
603 s->objs_per_slab, s->order,
604 s->slabs ? (s->partial * 100) / s->slabs : 100,
605 s->slabs ? (s->objects * s->object_size * 100) /
606 (s->slabs * (page_size << s->order)) : 100,
611 * Analyze debug options. Return false if something is amiss.
613 static int debug_opt_scan(char *opt)
615 if (!opt || !opt[0] || strcmp(opt, "-") == 0)
618 if (strcasecmp(opt, "a") == 0) {
662 static int slab_empty(struct slabinfo *s)
668 * We may still have slabs even if there are no objects. Shrinking will
672 set_obj(s, "shrink", 1);
677 static void slab_debug(struct slabinfo *s)
679 if (strcmp(s->name, "*") == 0)
682 if (sanity && !s->sanity_checks) {
683 set_obj(s, "sanity", 1);
685 if (!sanity && s->sanity_checks) {
687 set_obj(s, "sanity", 0);
689 fprintf(stderr, "%s not empty cannot disable sanity checks\n", s->name);
691 if (redzone && !s->red_zone) {
693 set_obj(s, "red_zone", 1);
695 fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
697 if (!redzone && s->red_zone) {
699 set_obj(s, "red_zone", 0);
701 fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
703 if (poison && !s->poison) {
705 set_obj(s, "poison", 1);
707 fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
709 if (!poison && s->poison) {
711 set_obj(s, "poison", 0);
713 fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
715 if (tracking && !s->store_user) {
717 set_obj(s, "store_user", 1);
719 fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
721 if (!tracking && s->store_user) {
723 set_obj(s, "store_user", 0);
725 fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
727 if (tracing && !s->trace) {
729 set_obj(s, "trace", 1);
731 fprintf(stderr, "%s can only enable trace for one slab at a time\n", s->name);
733 if (!tracing && s->trace)
734 set_obj(s, "trace", 1);
737 static void totals(void)
742 char b1[20], b2[20], b3[20], b4[20];
743 unsigned long long max = 1ULL << 63;
746 unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
748 /* Number of partial slabs in a slabcache */
749 unsigned long long min_partial = max, max_partial = 0,
750 avg_partial, total_partial = 0;
752 /* Number of slabs in a slab cache */
753 unsigned long long min_slabs = max, max_slabs = 0,
754 avg_slabs, total_slabs = 0;
756 /* Size of the whole slab */
757 unsigned long long min_size = max, max_size = 0,
758 avg_size, total_size = 0;
760 /* Bytes used for object storage in a slab */
761 unsigned long long min_used = max, max_used = 0,
762 avg_used, total_used = 0;
764 /* Waste: Bytes used for alignment and padding */
765 unsigned long long min_waste = max, max_waste = 0,
766 avg_waste, total_waste = 0;
767 /* Number of objects in a slab */
768 unsigned long long min_objects = max, max_objects = 0,
769 avg_objects, total_objects = 0;
770 /* Waste per object */
771 unsigned long long min_objwaste = max,
772 max_objwaste = 0, avg_objwaste,
775 /* Memory per object */
776 unsigned long long min_memobj = max,
777 max_memobj = 0, avg_memobj,
780 /* Percentage of partial slabs per slab */
781 unsigned long min_ppart = 100, max_ppart = 0,
782 avg_ppart, total_ppart = 0;
784 /* Number of objects in partial slabs */
785 unsigned long min_partobj = max, max_partobj = 0,
786 avg_partobj, total_partobj = 0;
788 /* Percentage of partial objects of all objects in a slab */
789 unsigned long min_ppartobj = 100, max_ppartobj = 0,
790 avg_ppartobj, total_ppartobj = 0;
793 for (s = slabinfo; s < slabinfo + slabs; s++) {
794 unsigned long long size;
796 unsigned long long wasted;
797 unsigned long long objwaste;
798 unsigned long percentage_partial_slabs;
799 unsigned long percentage_partial_objs;
801 if (!s->slabs || !s->objects)
807 used = s->objects * s->object_size;
808 wasted = size - used;
809 objwaste = s->slab_size - s->object_size;
811 percentage_partial_slabs = s->partial * 100 / s->slabs;
812 if (percentage_partial_slabs > 100)
813 percentage_partial_slabs = 100;
815 percentage_partial_objs = s->objects_partial * 100
818 if (percentage_partial_objs > 100)
819 percentage_partial_objs = 100;
821 if (s->object_size < min_objsize)
822 min_objsize = s->object_size;
823 if (s->partial < min_partial)
824 min_partial = s->partial;
825 if (s->slabs < min_slabs)
826 min_slabs = s->slabs;
829 if (wasted < min_waste)
831 if (objwaste < min_objwaste)
832 min_objwaste = objwaste;
833 if (s->objects < min_objects)
834 min_objects = s->objects;
837 if (s->objects_partial < min_partobj)
838 min_partobj = s->objects_partial;
839 if (percentage_partial_slabs < min_ppart)
840 min_ppart = percentage_partial_slabs;
841 if (percentage_partial_objs < min_ppartobj)
842 min_ppartobj = percentage_partial_objs;
843 if (s->slab_size < min_memobj)
844 min_memobj = s->slab_size;
846 if (s->object_size > max_objsize)
847 max_objsize = s->object_size;
848 if (s->partial > max_partial)
849 max_partial = s->partial;
850 if (s->slabs > max_slabs)
851 max_slabs = s->slabs;
854 if (wasted > max_waste)
856 if (objwaste > max_objwaste)
857 max_objwaste = objwaste;
858 if (s->objects > max_objects)
859 max_objects = s->objects;
862 if (s->objects_partial > max_partobj)
863 max_partobj = s->objects_partial;
864 if (percentage_partial_slabs > max_ppart)
865 max_ppart = percentage_partial_slabs;
866 if (percentage_partial_objs > max_ppartobj)
867 max_ppartobj = percentage_partial_objs;
868 if (s->slab_size > max_memobj)
869 max_memobj = s->slab_size;
871 total_partial += s->partial;
872 total_slabs += s->slabs;
874 total_waste += wasted;
876 total_objects += s->objects;
878 total_partobj += s->objects_partial;
879 total_ppart += percentage_partial_slabs;
880 total_ppartobj += percentage_partial_objs;
882 total_objwaste += s->objects * objwaste;
883 total_objsize += s->objects * s->slab_size;
886 if (!total_objects) {
887 printf("No objects\n");
891 printf("No slabs\n");
895 /* Per slab averages */
896 avg_partial = total_partial / used_slabs;
897 avg_slabs = total_slabs / used_slabs;
898 avg_size = total_size / used_slabs;
899 avg_waste = total_waste / used_slabs;
901 avg_objects = total_objects / used_slabs;
902 avg_used = total_used / used_slabs;
903 avg_partobj = total_partobj / used_slabs;
904 avg_ppart = total_ppart / used_slabs;
905 avg_ppartobj = total_ppartobj / used_slabs;
907 /* Per object object sizes */
908 avg_objsize = total_used / total_objects;
909 avg_objwaste = total_objwaste / total_objects;
910 avg_partobj = total_partobj * 100 / total_objects;
911 avg_memobj = total_objsize / total_objects;
913 printf("Slabcache Totals\n");
914 printf("----------------\n");
915 printf("Slabcaches : %3d Aliases : %3d->%-3d Active: %3d\n",
916 slabs, aliases, alias_targets, used_slabs);
918 store_size(b1, total_size);store_size(b2, total_waste);
919 store_size(b3, total_waste * 100 / total_used);
920 printf("Memory used: %6s # Loss : %6s MRatio:%6s%%\n", b1, b2, b3);
922 store_size(b1, total_objects);store_size(b2, total_partobj);
923 store_size(b3, total_partobj * 100 / total_objects);
924 printf("# Objects : %6s # PartObj: %6s ORatio:%6s%%\n", b1, b2, b3);
927 printf("Per Cache Average Min Max Total\n");
928 printf("---------------------------------------------------------\n");
930 store_size(b1, avg_objects);store_size(b2, min_objects);
931 store_size(b3, max_objects);store_size(b4, total_objects);
932 printf("#Objects %10s %10s %10s %10s\n",
935 store_size(b1, avg_slabs);store_size(b2, min_slabs);
936 store_size(b3, max_slabs);store_size(b4, total_slabs);
937 printf("#Slabs %10s %10s %10s %10s\n",
940 store_size(b1, avg_partial);store_size(b2, min_partial);
941 store_size(b3, max_partial);store_size(b4, total_partial);
942 printf("#PartSlab %10s %10s %10s %10s\n",
944 store_size(b1, avg_ppart);store_size(b2, min_ppart);
945 store_size(b3, max_ppart);
946 store_size(b4, total_partial * 100 / total_slabs);
947 printf("%%PartSlab%10s%% %10s%% %10s%% %10s%%\n",
950 store_size(b1, avg_partobj);store_size(b2, min_partobj);
951 store_size(b3, max_partobj);
952 store_size(b4, total_partobj);
953 printf("PartObjs %10s %10s %10s %10s\n",
956 store_size(b1, avg_ppartobj);store_size(b2, min_ppartobj);
957 store_size(b3, max_ppartobj);
958 store_size(b4, total_partobj * 100 / total_objects);
959 printf("%% PartObj%10s%% %10s%% %10s%% %10s%%\n",
962 store_size(b1, avg_size);store_size(b2, min_size);
963 store_size(b3, max_size);store_size(b4, total_size);
964 printf("Memory %10s %10s %10s %10s\n",
967 store_size(b1, avg_used);store_size(b2, min_used);
968 store_size(b3, max_used);store_size(b4, total_used);
969 printf("Used %10s %10s %10s %10s\n",
972 store_size(b1, avg_waste);store_size(b2, min_waste);
973 store_size(b3, max_waste);store_size(b4, total_waste);
974 printf("Loss %10s %10s %10s %10s\n",
978 printf("Per Object Average Min Max\n");
979 printf("---------------------------------------------\n");
981 store_size(b1, avg_memobj);store_size(b2, min_memobj);
982 store_size(b3, max_memobj);
983 printf("Memory %10s %10s %10s\n",
985 store_size(b1, avg_objsize);store_size(b2, min_objsize);
986 store_size(b3, max_objsize);
987 printf("User %10s %10s %10s\n",
990 store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
991 store_size(b3, max_objwaste);
992 printf("Loss %10s %10s %10s\n",
996 static void sort_slabs(void)
998 struct slabinfo *s1,*s2;
1000 for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
1001 for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
1005 result = slab_size(s1) < slab_size(s2);
1006 else if (sort_active)
1007 result = slab_activity(s1) < slab_activity(s2);
1009 result = strcasecmp(s1->name, s2->name);
1017 memcpy(&t, s1, sizeof(struct slabinfo));
1018 memcpy(s1, s2, sizeof(struct slabinfo));
1019 memcpy(s2, &t, sizeof(struct slabinfo));
1025 static void sort_aliases(void)
1027 struct aliasinfo *a1,*a2;
1029 for (a1 = aliasinfo; a1 < aliasinfo + aliases; a1++) {
1030 for (a2 = a1 + 1; a2 < aliasinfo + aliases; a2++) {
1035 if (show_alias && !show_inverted) {
1039 if (strcasecmp(n1, n2) > 0) {
1042 memcpy(&t, a1, sizeof(struct aliasinfo));
1043 memcpy(a1, a2, sizeof(struct aliasinfo));
1044 memcpy(a2, &t, sizeof(struct aliasinfo));
1050 static void link_slabs(void)
1052 struct aliasinfo *a;
1055 for (a = aliasinfo; a < aliasinfo + aliases; a++) {
1057 for (s = slabinfo; s < slabinfo + slabs; s++)
1058 if (strcmp(a->ref, s->name) == 0) {
1063 if (s == slabinfo + slabs)
1064 fatal("Unresolved alias %s\n", a->ref);
1068 static void alias(void)
1070 struct aliasinfo *a;
1071 char *active = NULL;
1076 for(a = aliasinfo; a < aliasinfo + aliases; a++) {
1078 if (!show_single_ref && a->slab->refs == 1)
1081 if (!show_inverted) {
1083 if (strcmp(a->slab->name, active) == 0) {
1084 printf(" %s", a->name);
1088 printf("\n%-12s <- %s", a->slab->name, a->name);
1089 active = a->slab->name;
1092 printf("%-20s -> %s\n", a->name, a->slab->name);
1099 static void rename_slabs(void)
1102 struct aliasinfo *a;
1104 for (s = slabinfo; s < slabinfo + slabs; s++) {
1105 if (*s->name != ':')
1108 if (s->refs > 1 && !show_first_alias)
1111 a = find_one_alias(s);
1122 static int slab_mismatch(char *slab)
1124 return regexec(&pattern, slab, 0, NULL, 0);
1127 static void read_slab_dir(void)
1131 struct slabinfo *slab = slabinfo;
1132 struct aliasinfo *alias = aliasinfo;
1137 if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
1138 fatal("SYSFS support for SLUB not active\n");
1141 while ((de = readdir(dir))) {
1142 if (de->d_name[0] == '.' ||
1143 (de->d_name[0] != ':' && slab_mismatch(de->d_name)))
1145 switch (de->d_type) {
1147 alias->name = strdup(de->d_name);
1148 count = readlink(de->d_name, buffer, sizeof(buffer));
1151 fatal("Cannot read symlink %s\n", de->d_name);
1155 while (p > buffer && p[-1] != '/')
1157 alias->ref = strdup(p);
1161 if (chdir(de->d_name))
1162 fatal("Unable to access slab %s\n", slab->name);
1163 slab->name = strdup(de->d_name);
1166 slab->aliases = get_obj("aliases");
1167 slab->align = get_obj("align");
1168 slab->cache_dma = get_obj("cache_dma");
1169 slab->cpu_slabs = get_obj("cpu_slabs");
1170 slab->destroy_by_rcu = get_obj("destroy_by_rcu");
1171 slab->hwcache_align = get_obj("hwcache_align");
1172 slab->object_size = get_obj("object_size");
1173 slab->objects = get_obj("objects");
1174 slab->objects_partial = get_obj("objects_partial");
1175 slab->objects_total = get_obj("objects_total");
1176 slab->objs_per_slab = get_obj("objs_per_slab");
1177 slab->order = get_obj("order");
1178 slab->partial = get_obj("partial");
1179 slab->partial = get_obj_and_str("partial", &t);
1180 decode_numa_list(slab->numa_partial, t);
1182 slab->poison = get_obj("poison");
1183 slab->reclaim_account = get_obj("reclaim_account");
1184 slab->red_zone = get_obj("red_zone");
1185 slab->sanity_checks = get_obj("sanity_checks");
1186 slab->slab_size = get_obj("slab_size");
1187 slab->slabs = get_obj_and_str("slabs", &t);
1188 decode_numa_list(slab->numa, t);
1190 slab->store_user = get_obj("store_user");
1191 slab->trace = get_obj("trace");
1192 slab->alloc_fastpath = get_obj("alloc_fastpath");
1193 slab->alloc_slowpath = get_obj("alloc_slowpath");
1194 slab->free_fastpath = get_obj("free_fastpath");
1195 slab->free_slowpath = get_obj("free_slowpath");
1196 slab->free_frozen= get_obj("free_frozen");
1197 slab->free_add_partial = get_obj("free_add_partial");
1198 slab->free_remove_partial = get_obj("free_remove_partial");
1199 slab->alloc_from_partial = get_obj("alloc_from_partial");
1200 slab->alloc_slab = get_obj("alloc_slab");
1201 slab->alloc_refill = get_obj("alloc_refill");
1202 slab->free_slab = get_obj("free_slab");
1203 slab->cpuslab_flush = get_obj("cpuslab_flush");
1204 slab->deactivate_full = get_obj("deactivate_full");
1205 slab->deactivate_empty = get_obj("deactivate_empty");
1206 slab->deactivate_to_head = get_obj("deactivate_to_head");
1207 slab->deactivate_to_tail = get_obj("deactivate_to_tail");
1208 slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
1209 slab->order_fallback = get_obj("order_fallback");
1210 slab->cmpxchg_double_cpu_fail = get_obj("cmpxchg_double_cpu_fail");
1211 slab->cmpxchg_double_fail = get_obj("cmpxchg_double_fail");
1212 slab->alloc_node_mismatch = get_obj("alloc_node_mismatch");
1213 slab->deactivate_bypass = get_obj("deactivate_bypass");
1215 if (slab->name[0] == ':')
1220 fatal("Unknown file type %lx\n", de->d_type);
1224 slabs = slab - slabinfo;
1225 actual_slabs = slabs;
1226 aliases = alias - aliasinfo;
1227 if (slabs > MAX_SLABS)
1228 fatal("Too many slabs\n");
1229 if (aliases > MAX_ALIASES)
1230 fatal("Too many aliases\n");
1233 static void output_slabs(void)
1235 struct slabinfo *slab;
1237 for (slab = slabinfo; slab < slabinfo + slabs; slab++) {
1245 else if (show_track)
1246 show_tracking(slab);
1248 slab_validate(slab);
1257 else if (show_report)
1262 struct option opts[] = {
1263 { "aliases", 0, NULL, 'a' },
1264 { "activity", 0, NULL, 'A' },
1265 { "debug", 2, NULL, 'd' },
1266 { "display-activity", 0, NULL, 'D' },
1267 { "empty", 0, NULL, 'e' },
1268 { "first-alias", 0, NULL, 'f' },
1269 { "help", 0, NULL, 'h' },
1270 { "inverted", 0, NULL, 'i'},
1271 { "numa", 0, NULL, 'n' },
1272 { "ops", 0, NULL, 'o' },
1273 { "report", 0, NULL, 'r' },
1274 { "shrink", 0, NULL, 's' },
1275 { "slabs", 0, NULL, 'l' },
1276 { "track", 0, NULL, 't'},
1277 { "validate", 0, NULL, 'v' },
1278 { "zero", 0, NULL, 'z' },
1279 { "1ref", 0, NULL, '1'},
1280 { NULL, 0, NULL, 0 }
1283 int main(int argc, char *argv[])
1287 char *pattern_source;
1289 page_size = getpagesize();
1291 while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTS",
1295 show_single_ref = 1;
1305 if (!debug_opt_scan(optarg))
1306 fatal("Invalid debug option '%s'\n", optarg);
1315 show_first_alias = 1;
1355 fatal("%s: Invalid option '%c'\n", argv[0], optopt);
1359 if (!show_slab && !show_alias && !show_track && !show_report
1360 && !validate && !shrink && !set_debug && !show_ops)
1364 pattern_source = argv[optind];
1366 pattern_source = ".*";
1368 err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
1370 fatal("%s: Invalid pattern '%s' code %d\n",
1371 argv[0], pattern_source, err);