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;
45 unsigned long cpu_partial_alloc, cpu_partial_free;
47 int numa_partial[MAX_NODES];
48 } slabinfo[MAX_SLABS];
53 struct slabinfo *slab;
54 } aliasinfo[MAX_ALIASES];
82 int output_lines = -1;
98 static void fatal(const char *x, ...)
103 vfprintf(stderr, x, ap);
108 static void usage(void)
110 printf("slabinfo 4/15/2011. (c) 2007 sgi/(c) 2011 Linux Foundation.\n\n"
111 "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
112 "-a|--aliases Show aliases\n"
113 "-A|--activity Most active slabs first\n"
114 "-d<options>|--debug=<options> Set/Clear Debug options\n"
115 "-D|--display-active Switch line format to activity\n"
116 "-e|--empty Show empty slabs\n"
117 "-f|--first-alias Show first alias\n"
118 "-h|--help Show usage information\n"
119 "-i|--inverted Inverted list\n"
120 "-l|--slabs Show slabs\n"
121 "-n|--numa Show NUMA information\n"
122 "-o|--ops Show kmem_cache_ops\n"
123 "-s|--shrink Shrink slabs\n"
124 "-r|--report Detailed report on single slabs\n"
125 "-S|--Size Sort by size\n"
126 "-t|--tracking Show alloc/free information\n"
127 "-T|--Totals Show summary information\n"
128 "-v|--validate Validate slabs\n"
129 "-z|--zero Include empty slabs\n"
130 "-1|--1ref Single reference\n"
131 "-N|--lines=K Show the first K slabs\n"
132 "-L|--Loss Sort by loss\n"
133 "-X|--Xtotals Show extended summary information\n"
134 "-B|--Bytes Show size in bytes\n"
135 "\nValid debug options (FZPUT may be combined)\n"
136 "a / A Switch on all debug options (=FZUP)\n"
137 "- Switch off all debug options\n"
138 "f / F Sanity Checks (SLAB_CONSISTENCY_CHECKS)\n"
146 static unsigned long read_obj(const char *name)
148 FILE *f = fopen(name, "r");
153 if (!fgets(buffer, sizeof(buffer), f))
156 if (buffer[strlen(buffer)] == '\n')
157 buffer[strlen(buffer)] = 0;
159 return strlen(buffer);
164 * Get the contents of an attribute
166 static unsigned long get_obj(const char *name)
174 static unsigned long get_obj_and_str(const char *name, char **x)
176 unsigned long result = 0;
181 if (!read_obj(name)) {
185 result = strtoul(buffer, &p, 10);
193 static void set_obj(struct slabinfo *s, const char *name, int n)
198 snprintf(x, 100, "%s/%s", s->name, name);
201 fatal("Cannot write to %s\n", x);
203 fprintf(f, "%d\n", n);
207 static unsigned long read_slab_obj(struct slabinfo *s, const char *name)
213 snprintf(x, 100, "%s/%s", s->name, name);
219 l = fread(buffer, 1, sizeof(buffer), f);
228 * Put a size string together
230 static int store_size(char *buffer, unsigned long value)
232 unsigned long divisor = 1;
237 if (value > 1000000000UL) {
238 divisor = 100000000UL;
240 } else if (value > 1000000UL) {
243 } else if (value > 1000UL) {
250 n = sprintf(buffer, "%ld",value);
257 memmove(buffer + n - 2, buffer + n - 3, 4);
264 static void decode_numa_list(int *numa, char *t)
269 memset(numa, 0, MAX_NODES * sizeof(int));
276 node = strtoul(t, &t, 10);
279 nr = strtoul(t, &t, 10);
281 if (node > highest_node)
289 static void slab_validate(struct slabinfo *s)
291 if (strcmp(s->name, "*") == 0)
294 set_obj(s, "validate", 1);
297 static void slab_shrink(struct slabinfo *s)
299 if (strcmp(s->name, "*") == 0)
302 set_obj(s, "shrink", 1);
307 static void first_line(void)
310 printf("Name Objects Alloc Free"
311 " %%Fast Fallb O CmpX UL\n");
313 printf("Name Objects Objsize %s "
314 "Slabs/Part/Cpu O/S O %%Fr %%Ef Flg\n",
315 sort_loss ? " Loss" : "Space");
319 * Find the shortest alias of a slab
321 static struct aliasinfo *find_one_alias(struct slabinfo *find)
324 struct aliasinfo *best = NULL;
326 for(a = aliasinfo;a < aliasinfo + aliases; a++) {
327 if (a->slab == find &&
328 (!best || strlen(best->name) < strlen(a->name))) {
330 if (strncmp(a->name,"kmall", 5) == 0)
337 static unsigned long slab_size(struct slabinfo *s)
339 return s->slabs * (page_size << s->order);
342 static unsigned long slab_activity(struct slabinfo *s)
344 return s->alloc_fastpath + s->free_fastpath +
345 s->alloc_slowpath + s->free_slowpath;
348 static unsigned long slab_waste(struct slabinfo *s)
350 return slab_size(s) - s->objects * s->object_size;
353 static void slab_numa(struct slabinfo *s, int mode)
357 if (strcmp(s->name, "*") == 0)
361 printf("\n%s: No NUMA information available.\n", s->name);
365 if (skip_zero && !s->slabs)
369 printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
370 for(node = 0; node <= highest_node; node++)
371 printf(" %4d", node);
372 printf("\n----------------------");
373 for(node = 0; node <= highest_node; node++)
377 printf("%-21s ", mode ? "All slabs" : s->name);
378 for(node = 0; node <= highest_node; node++) {
381 store_size(b, s->numa[node]);
386 printf("%-21s ", "Partial slabs");
387 for(node = 0; node <= highest_node; node++) {
390 store_size(b, s->numa_partial[node]);
398 static void show_tracking(struct slabinfo *s)
400 printf("\n%s: Kernel object allocation\n", s->name);
401 printf("-----------------------------------------------------------------------\n");
402 if (read_slab_obj(s, "alloc_calls"))
403 printf("%s", buffer);
407 printf("\n%s: Kernel object freeing\n", s->name);
408 printf("------------------------------------------------------------------------\n");
409 if (read_slab_obj(s, "free_calls"))
410 printf("%s", buffer);
416 static void ops(struct slabinfo *s)
418 if (strcmp(s->name, "*") == 0)
421 if (read_slab_obj(s, "ops")) {
422 printf("\n%s: kmem_cache operations\n", s->name);
423 printf("--------------------------------------------\n");
424 printf("%s", buffer);
426 printf("\n%s has no kmem_cache operations\n", s->name);
429 static const char *onoff(int x)
436 static void slab_stats(struct slabinfo *s)
438 unsigned long total_alloc;
439 unsigned long total_free;
445 total_alloc = s->alloc_fastpath + s->alloc_slowpath;
446 total_free = s->free_fastpath + s->free_slowpath;
452 printf("Slab Perf Counter Alloc Free %%Al %%Fr\n");
453 printf("--------------------------------------------------\n");
454 printf("Fastpath %8lu %8lu %3lu %3lu\n",
455 s->alloc_fastpath, s->free_fastpath,
456 s->alloc_fastpath * 100 / total_alloc,
457 total_free ? s->free_fastpath * 100 / total_free : 0);
458 printf("Slowpath %8lu %8lu %3lu %3lu\n",
459 total_alloc - s->alloc_fastpath, s->free_slowpath,
460 (total_alloc - s->alloc_fastpath) * 100 / total_alloc,
461 total_free ? s->free_slowpath * 100 / total_free : 0);
462 printf("Page Alloc %8lu %8lu %3lu %3lu\n",
463 s->alloc_slab, s->free_slab,
464 s->alloc_slab * 100 / total_alloc,
465 total_free ? s->free_slab * 100 / total_free : 0);
466 printf("Add partial %8lu %8lu %3lu %3lu\n",
467 s->deactivate_to_head + s->deactivate_to_tail,
469 (s->deactivate_to_head + s->deactivate_to_tail) * 100 / total_alloc,
470 total_free ? s->free_add_partial * 100 / total_free : 0);
471 printf("Remove partial %8lu %8lu %3lu %3lu\n",
472 s->alloc_from_partial, s->free_remove_partial,
473 s->alloc_from_partial * 100 / total_alloc,
474 total_free ? s->free_remove_partial * 100 / total_free : 0);
476 printf("Cpu partial list %8lu %8lu %3lu %3lu\n",
477 s->cpu_partial_alloc, s->cpu_partial_free,
478 s->cpu_partial_alloc * 100 / total_alloc,
479 total_free ? s->cpu_partial_free * 100 / total_free : 0);
481 printf("RemoteObj/SlabFrozen %8lu %8lu %3lu %3lu\n",
482 s->deactivate_remote_frees, s->free_frozen,
483 s->deactivate_remote_frees * 100 / total_alloc,
484 total_free ? s->free_frozen * 100 / total_free : 0);
486 printf("Total %8lu %8lu\n\n", total_alloc, total_free);
488 if (s->cpuslab_flush)
489 printf("Flushes %8lu\n", s->cpuslab_flush);
491 total = s->deactivate_full + s->deactivate_empty +
492 s->deactivate_to_head + s->deactivate_to_tail + s->deactivate_bypass;
495 printf("\nSlab Deactivation Ocurrences %%\n");
496 printf("-------------------------------------------------\n");
497 printf("Slab full %7lu %3lu%%\n",
498 s->deactivate_full, (s->deactivate_full * 100) / total);
499 printf("Slab empty %7lu %3lu%%\n",
500 s->deactivate_empty, (s->deactivate_empty * 100) / total);
501 printf("Moved to head of partial list %7lu %3lu%%\n",
502 s->deactivate_to_head, (s->deactivate_to_head * 100) / total);
503 printf("Moved to tail of partial list %7lu %3lu%%\n",
504 s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total);
505 printf("Deactivation bypass %7lu %3lu%%\n",
506 s->deactivate_bypass, (s->deactivate_bypass * 100) / total);
507 printf("Refilled from foreign frees %7lu %3lu%%\n",
508 s->alloc_refill, (s->alloc_refill * 100) / total);
509 printf("Node mismatch %7lu %3lu%%\n",
510 s->alloc_node_mismatch, (s->alloc_node_mismatch * 100) / total);
513 if (s->cmpxchg_double_fail || s->cmpxchg_double_cpu_fail)
514 printf("\nCmpxchg_double Looping\n------------------------\n");
515 printf("Locked Cmpxchg Double redos %lu\nUnlocked Cmpxchg Double redos %lu\n",
516 s->cmpxchg_double_fail, s->cmpxchg_double_cpu_fail);
519 static void report(struct slabinfo *s)
521 if (strcmp(s->name, "*") == 0)
524 printf("\nSlabcache: %-15s Aliases: %2d Order : %2d Objects: %lu\n",
525 s->name, s->aliases, s->order, s->objects);
526 if (s->hwcache_align)
527 printf("** Hardware cacheline aligned\n");
529 printf("** Memory is allocated in a special DMA zone\n");
530 if (s->destroy_by_rcu)
531 printf("** Slabs are destroyed via RCU\n");
532 if (s->reclaim_account)
533 printf("** Reclaim accounting active\n");
535 printf("\nSizes (bytes) Slabs Debug Memory\n");
536 printf("------------------------------------------------------------------------\n");
537 printf("Object : %7d Total : %7ld Sanity Checks : %s Total: %7ld\n",
538 s->object_size, s->slabs, onoff(s->sanity_checks),
539 s->slabs * (page_size << s->order));
540 printf("SlabObj: %7d Full : %7ld Redzoning : %s Used : %7ld\n",
541 s->slab_size, s->slabs - s->partial - s->cpu_slabs,
542 onoff(s->red_zone), s->objects * s->object_size);
543 printf("SlabSiz: %7d Partial: %7ld Poisoning : %s Loss : %7ld\n",
544 page_size << s->order, s->partial, onoff(s->poison),
545 s->slabs * (page_size << s->order) - s->objects * s->object_size);
546 printf("Loss : %7d CpuSlab: %7d Tracking : %s Lalig: %7ld\n",
547 s->slab_size - s->object_size, s->cpu_slabs, onoff(s->store_user),
548 (s->slab_size - s->object_size) * s->objects);
549 printf("Align : %7d Objects: %7d Tracing : %s Lpadd: %7ld\n",
550 s->align, s->objs_per_slab, onoff(s->trace),
551 ((page_size << s->order) - s->objs_per_slab * s->slab_size) *
560 static void slabcache(struct slabinfo *s)
567 if (strcmp(s->name, "*") == 0)
570 if (actual_slabs == 1) {
575 if (skip_zero && !show_empty && !s->slabs)
578 if (show_empty && s->slabs)
582 store_size(size_str, slab_size(s));
584 store_size(size_str, slab_waste(s));
585 snprintf(dist_str, 40, "%lu/%lu/%d", s->slabs - s->cpu_slabs,
586 s->partial, s->cpu_slabs);
595 if (s->hwcache_align)
599 if (s->reclaim_account)
603 if (s->sanity_checks)
612 unsigned long total_alloc;
613 unsigned long total_free;
615 total_alloc = s->alloc_fastpath + s->alloc_slowpath;
616 total_free = s->free_fastpath + s->free_slowpath;
618 printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d %4ld %4ld\n",
620 total_alloc, total_free,
621 total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,
622 total_free ? (s->free_fastpath * 100 / total_free) : 0,
623 s->order_fallback, s->order, s->cmpxchg_double_fail,
624 s->cmpxchg_double_cpu_fail);
626 printf("%-21s %8ld %7d %15s %14s %4d %1d %3ld %3ld %s\n",
627 s->name, s->objects, s->object_size, size_str, dist_str,
628 s->objs_per_slab, s->order,
629 s->slabs ? (s->partial * 100) / s->slabs : 100,
630 s->slabs ? (s->objects * s->object_size * 100) /
631 (s->slabs * (page_size << s->order)) : 100,
637 * Analyze debug options. Return false if something is amiss.
639 static int debug_opt_scan(char *opt)
641 if (!opt || !opt[0] || strcmp(opt, "-") == 0)
644 if (strcasecmp(opt, "a") == 0) {
688 static int slab_empty(struct slabinfo *s)
694 * We may still have slabs even if there are no objects. Shrinking will
698 set_obj(s, "shrink", 1);
703 static void slab_debug(struct slabinfo *s)
705 if (strcmp(s->name, "*") == 0)
708 if (sanity && !s->sanity_checks) {
709 set_obj(s, "sanity", 1);
711 if (!sanity && s->sanity_checks) {
713 set_obj(s, "sanity", 0);
715 fprintf(stderr, "%s not empty cannot disable sanity checks\n", s->name);
717 if (redzone && !s->red_zone) {
719 set_obj(s, "red_zone", 1);
721 fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
723 if (!redzone && s->red_zone) {
725 set_obj(s, "red_zone", 0);
727 fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
729 if (poison && !s->poison) {
731 set_obj(s, "poison", 1);
733 fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
735 if (!poison && s->poison) {
737 set_obj(s, "poison", 0);
739 fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
741 if (tracking && !s->store_user) {
743 set_obj(s, "store_user", 1);
745 fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
747 if (!tracking && s->store_user) {
749 set_obj(s, "store_user", 0);
751 fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
753 if (tracing && !s->trace) {
755 set_obj(s, "trace", 1);
757 fprintf(stderr, "%s can only enable trace for one slab at a time\n", s->name);
759 if (!tracing && s->trace)
760 set_obj(s, "trace", 1);
763 static void totals(void)
768 char b1[20], b2[20], b3[20], b4[20];
769 unsigned long long max = 1ULL << 63;
772 unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
774 /* Number of partial slabs in a slabcache */
775 unsigned long long min_partial = max, max_partial = 0,
776 avg_partial, total_partial = 0;
778 /* Number of slabs in a slab cache */
779 unsigned long long min_slabs = max, max_slabs = 0,
780 avg_slabs, total_slabs = 0;
782 /* Size of the whole slab */
783 unsigned long long min_size = max, max_size = 0,
784 avg_size, total_size = 0;
786 /* Bytes used for object storage in a slab */
787 unsigned long long min_used = max, max_used = 0,
788 avg_used, total_used = 0;
790 /* Waste: Bytes used for alignment and padding */
791 unsigned long long min_waste = max, max_waste = 0,
792 avg_waste, total_waste = 0;
793 /* Number of objects in a slab */
794 unsigned long long min_objects = max, max_objects = 0,
795 avg_objects, total_objects = 0;
796 /* Waste per object */
797 unsigned long long min_objwaste = max,
798 max_objwaste = 0, avg_objwaste,
801 /* Memory per object */
802 unsigned long long min_memobj = max,
803 max_memobj = 0, avg_memobj,
806 /* Percentage of partial slabs per slab */
807 unsigned long min_ppart = 100, max_ppart = 0,
808 avg_ppart, total_ppart = 0;
810 /* Number of objects in partial slabs */
811 unsigned long min_partobj = max, max_partobj = 0,
812 avg_partobj, total_partobj = 0;
814 /* Percentage of partial objects of all objects in a slab */
815 unsigned long min_ppartobj = 100, max_ppartobj = 0,
816 avg_ppartobj, total_ppartobj = 0;
819 for (s = slabinfo; s < slabinfo + slabs; s++) {
820 unsigned long long size;
822 unsigned long long wasted;
823 unsigned long long objwaste;
824 unsigned long percentage_partial_slabs;
825 unsigned long percentage_partial_objs;
827 if (!s->slabs || !s->objects)
833 used = s->objects * s->object_size;
834 wasted = size - used;
835 objwaste = s->slab_size - s->object_size;
837 percentage_partial_slabs = s->partial * 100 / s->slabs;
838 if (percentage_partial_slabs > 100)
839 percentage_partial_slabs = 100;
841 percentage_partial_objs = s->objects_partial * 100
844 if (percentage_partial_objs > 100)
845 percentage_partial_objs = 100;
847 if (s->object_size < min_objsize)
848 min_objsize = s->object_size;
849 if (s->partial < min_partial)
850 min_partial = s->partial;
851 if (s->slabs < min_slabs)
852 min_slabs = s->slabs;
855 if (wasted < min_waste)
857 if (objwaste < min_objwaste)
858 min_objwaste = objwaste;
859 if (s->objects < min_objects)
860 min_objects = s->objects;
863 if (s->objects_partial < min_partobj)
864 min_partobj = s->objects_partial;
865 if (percentage_partial_slabs < min_ppart)
866 min_ppart = percentage_partial_slabs;
867 if (percentage_partial_objs < min_ppartobj)
868 min_ppartobj = percentage_partial_objs;
869 if (s->slab_size < min_memobj)
870 min_memobj = s->slab_size;
872 if (s->object_size > max_objsize)
873 max_objsize = s->object_size;
874 if (s->partial > max_partial)
875 max_partial = s->partial;
876 if (s->slabs > max_slabs)
877 max_slabs = s->slabs;
880 if (wasted > max_waste)
882 if (objwaste > max_objwaste)
883 max_objwaste = objwaste;
884 if (s->objects > max_objects)
885 max_objects = s->objects;
888 if (s->objects_partial > max_partobj)
889 max_partobj = s->objects_partial;
890 if (percentage_partial_slabs > max_ppart)
891 max_ppart = percentage_partial_slabs;
892 if (percentage_partial_objs > max_ppartobj)
893 max_ppartobj = percentage_partial_objs;
894 if (s->slab_size > max_memobj)
895 max_memobj = s->slab_size;
897 total_partial += s->partial;
898 total_slabs += s->slabs;
900 total_waste += wasted;
902 total_objects += s->objects;
904 total_partobj += s->objects_partial;
905 total_ppart += percentage_partial_slabs;
906 total_ppartobj += percentage_partial_objs;
908 total_objwaste += s->objects * objwaste;
909 total_objsize += s->objects * s->slab_size;
912 if (!total_objects) {
913 printf("No objects\n");
917 printf("No slabs\n");
921 /* Per slab averages */
922 avg_partial = total_partial / used_slabs;
923 avg_slabs = total_slabs / used_slabs;
924 avg_size = total_size / used_slabs;
925 avg_waste = total_waste / used_slabs;
927 avg_objects = total_objects / used_slabs;
928 avg_used = total_used / used_slabs;
929 avg_partobj = total_partobj / used_slabs;
930 avg_ppart = total_ppart / used_slabs;
931 avg_ppartobj = total_ppartobj / used_slabs;
933 /* Per object object sizes */
934 avg_objsize = total_used / total_objects;
935 avg_objwaste = total_objwaste / total_objects;
936 avg_partobj = total_partobj * 100 / total_objects;
937 avg_memobj = total_objsize / total_objects;
939 printf("Slabcache Totals\n");
940 printf("----------------\n");
941 printf("Slabcaches : %15d Aliases : %11d->%-3d Active: %3d\n",
942 slabs, aliases, alias_targets, used_slabs);
944 store_size(b1, total_size);store_size(b2, total_waste);
945 store_size(b3, total_waste * 100 / total_used);
946 printf("Memory used: %15s # Loss : %15s MRatio:%6s%%\n", b1, b2, b3);
948 store_size(b1, total_objects);store_size(b2, total_partobj);
949 store_size(b3, total_partobj * 100 / total_objects);
950 printf("# Objects : %15s # PartObj: %15s ORatio:%6s%%\n", b1, b2, b3);
953 printf("Per Cache Average "
955 printf("---------------------------------------"
956 "-------------------------------------\n");
958 store_size(b1, avg_objects);store_size(b2, min_objects);
959 store_size(b3, max_objects);store_size(b4, total_objects);
960 printf("#Objects %15s %15s %15s %15s\n",
963 store_size(b1, avg_slabs);store_size(b2, min_slabs);
964 store_size(b3, max_slabs);store_size(b4, total_slabs);
965 printf("#Slabs %15s %15s %15s %15s\n",
968 store_size(b1, avg_partial);store_size(b2, min_partial);
969 store_size(b3, max_partial);store_size(b4, total_partial);
970 printf("#PartSlab %15s %15s %15s %15s\n",
972 store_size(b1, avg_ppart);store_size(b2, min_ppart);
973 store_size(b3, max_ppart);
974 store_size(b4, total_partial * 100 / total_slabs);
975 printf("%%PartSlab%15s%% %15s%% %15s%% %15s%%\n",
978 store_size(b1, avg_partobj);store_size(b2, min_partobj);
979 store_size(b3, max_partobj);
980 store_size(b4, total_partobj);
981 printf("PartObjs %15s %15s %15s %15s\n",
984 store_size(b1, avg_ppartobj);store_size(b2, min_ppartobj);
985 store_size(b3, max_ppartobj);
986 store_size(b4, total_partobj * 100 / total_objects);
987 printf("%% PartObj%15s%% %15s%% %15s%% %15s%%\n",
990 store_size(b1, avg_size);store_size(b2, min_size);
991 store_size(b3, max_size);store_size(b4, total_size);
992 printf("Memory %15s %15s %15s %15s\n",
995 store_size(b1, avg_used);store_size(b2, min_used);
996 store_size(b3, max_used);store_size(b4, total_used);
997 printf("Used %15s %15s %15s %15s\n",
1000 store_size(b1, avg_waste);store_size(b2, min_waste);
1001 store_size(b3, max_waste);store_size(b4, total_waste);
1002 printf("Loss %15s %15s %15s %15s\n",
1006 printf("Per Object Average "
1008 printf("---------------------------------------"
1009 "--------------------\n");
1011 store_size(b1, avg_memobj);store_size(b2, min_memobj);
1012 store_size(b3, max_memobj);
1013 printf("Memory %15s %15s %15s\n",
1015 store_size(b1, avg_objsize);store_size(b2, min_objsize);
1016 store_size(b3, max_objsize);
1017 printf("User %15s %15s %15s\n",
1020 store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
1021 store_size(b3, max_objwaste);
1022 printf("Loss %15s %15s %15s\n",
1026 static void sort_slabs(void)
1028 struct slabinfo *s1,*s2;
1030 for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
1031 for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
1035 result = slab_size(s1) < slab_size(s2);
1036 else if (sort_active)
1037 result = slab_activity(s1) < slab_activity(s2);
1039 result = slab_waste(s1) < slab_waste(s2);
1041 result = strcasecmp(s1->name, s2->name);
1049 memcpy(&t, s1, sizeof(struct slabinfo));
1050 memcpy(s1, s2, sizeof(struct slabinfo));
1051 memcpy(s2, &t, sizeof(struct slabinfo));
1057 static void sort_aliases(void)
1059 struct aliasinfo *a1,*a2;
1061 for (a1 = aliasinfo; a1 < aliasinfo + aliases; a1++) {
1062 for (a2 = a1 + 1; a2 < aliasinfo + aliases; a2++) {
1067 if (show_alias && !show_inverted) {
1071 if (strcasecmp(n1, n2) > 0) {
1074 memcpy(&t, a1, sizeof(struct aliasinfo));
1075 memcpy(a1, a2, sizeof(struct aliasinfo));
1076 memcpy(a2, &t, sizeof(struct aliasinfo));
1082 static void link_slabs(void)
1084 struct aliasinfo *a;
1087 for (a = aliasinfo; a < aliasinfo + aliases; a++) {
1089 for (s = slabinfo; s < slabinfo + slabs; s++)
1090 if (strcmp(a->ref, s->name) == 0) {
1095 if (s == slabinfo + slabs)
1096 fatal("Unresolved alias %s\n", a->ref);
1100 static void alias(void)
1102 struct aliasinfo *a;
1103 char *active = NULL;
1108 for(a = aliasinfo; a < aliasinfo + aliases; a++) {
1110 if (!show_single_ref && a->slab->refs == 1)
1113 if (!show_inverted) {
1115 if (strcmp(a->slab->name, active) == 0) {
1116 printf(" %s", a->name);
1120 printf("\n%-12s <- %s", a->slab->name, a->name);
1121 active = a->slab->name;
1124 printf("%-15s -> %s\n", a->name, a->slab->name);
1131 static void rename_slabs(void)
1134 struct aliasinfo *a;
1136 for (s = slabinfo; s < slabinfo + slabs; s++) {
1137 if (*s->name != ':')
1140 if (s->refs > 1 && !show_first_alias)
1143 a = find_one_alias(s);
1154 static int slab_mismatch(char *slab)
1156 return regexec(&pattern, slab, 0, NULL, 0);
1159 static void read_slab_dir(void)
1163 struct slabinfo *slab = slabinfo;
1164 struct aliasinfo *alias = aliasinfo;
1169 if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
1170 fatal("SYSFS support for SLUB not active\n");
1173 while ((de = readdir(dir))) {
1174 if (de->d_name[0] == '.' ||
1175 (de->d_name[0] != ':' && slab_mismatch(de->d_name)))
1177 switch (de->d_type) {
1179 alias->name = strdup(de->d_name);
1180 count = readlink(de->d_name, buffer, sizeof(buffer)-1);
1183 fatal("Cannot read symlink %s\n", de->d_name);
1187 while (p > buffer && p[-1] != '/')
1189 alias->ref = strdup(p);
1193 if (chdir(de->d_name))
1194 fatal("Unable to access slab %s\n", slab->name);
1195 slab->name = strdup(de->d_name);
1198 slab->aliases = get_obj("aliases");
1199 slab->align = get_obj("align");
1200 slab->cache_dma = get_obj("cache_dma");
1201 slab->cpu_slabs = get_obj("cpu_slabs");
1202 slab->destroy_by_rcu = get_obj("destroy_by_rcu");
1203 slab->hwcache_align = get_obj("hwcache_align");
1204 slab->object_size = get_obj("object_size");
1205 slab->objects = get_obj("objects");
1206 slab->objects_partial = get_obj("objects_partial");
1207 slab->objects_total = get_obj("objects_total");
1208 slab->objs_per_slab = get_obj("objs_per_slab");
1209 slab->order = get_obj("order");
1210 slab->partial = get_obj("partial");
1211 slab->partial = get_obj_and_str("partial", &t);
1212 decode_numa_list(slab->numa_partial, t);
1214 slab->poison = get_obj("poison");
1215 slab->reclaim_account = get_obj("reclaim_account");
1216 slab->red_zone = get_obj("red_zone");
1217 slab->sanity_checks = get_obj("sanity_checks");
1218 slab->slab_size = get_obj("slab_size");
1219 slab->slabs = get_obj_and_str("slabs", &t);
1220 decode_numa_list(slab->numa, t);
1222 slab->store_user = get_obj("store_user");
1223 slab->trace = get_obj("trace");
1224 slab->alloc_fastpath = get_obj("alloc_fastpath");
1225 slab->alloc_slowpath = get_obj("alloc_slowpath");
1226 slab->free_fastpath = get_obj("free_fastpath");
1227 slab->free_slowpath = get_obj("free_slowpath");
1228 slab->free_frozen= get_obj("free_frozen");
1229 slab->free_add_partial = get_obj("free_add_partial");
1230 slab->free_remove_partial = get_obj("free_remove_partial");
1231 slab->alloc_from_partial = get_obj("alloc_from_partial");
1232 slab->alloc_slab = get_obj("alloc_slab");
1233 slab->alloc_refill = get_obj("alloc_refill");
1234 slab->free_slab = get_obj("free_slab");
1235 slab->cpuslab_flush = get_obj("cpuslab_flush");
1236 slab->deactivate_full = get_obj("deactivate_full");
1237 slab->deactivate_empty = get_obj("deactivate_empty");
1238 slab->deactivate_to_head = get_obj("deactivate_to_head");
1239 slab->deactivate_to_tail = get_obj("deactivate_to_tail");
1240 slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
1241 slab->order_fallback = get_obj("order_fallback");
1242 slab->cmpxchg_double_cpu_fail = get_obj("cmpxchg_double_cpu_fail");
1243 slab->cmpxchg_double_fail = get_obj("cmpxchg_double_fail");
1244 slab->cpu_partial_alloc = get_obj("cpu_partial_alloc");
1245 slab->cpu_partial_free = get_obj("cpu_partial_free");
1246 slab->alloc_node_mismatch = get_obj("alloc_node_mismatch");
1247 slab->deactivate_bypass = get_obj("deactivate_bypass");
1249 if (slab->name[0] == ':')
1254 fatal("Unknown file type %lx\n", de->d_type);
1258 slabs = slab - slabinfo;
1259 actual_slabs = slabs;
1260 aliases = alias - aliasinfo;
1261 if (slabs > MAX_SLABS)
1262 fatal("Too many slabs\n");
1263 if (aliases > MAX_ALIASES)
1264 fatal("Too many aliases\n");
1267 static void output_slabs(void)
1269 struct slabinfo *slab;
1270 int lines = output_lines;
1272 for (slab = slabinfo; (slab < slabinfo + slabs) &&
1273 lines != 0; slab++) {
1283 else if (show_track)
1284 show_tracking(slab);
1286 slab_validate(slab);
1295 else if (show_report)
1300 static void xtotals(void)
1307 printf("\nSlabs sorted by size\n");
1308 printf("--------------------\n");
1314 printf("\nSlabs sorted by loss\n");
1315 printf("--------------------\n");
1324 struct option opts[] = {
1325 { "aliases", no_argument, NULL, 'a' },
1326 { "activity", no_argument, NULL, 'A' },
1327 { "debug", optional_argument, NULL, 'd' },
1328 { "display-activity", no_argument, NULL, 'D' },
1329 { "empty", no_argument, NULL, 'e' },
1330 { "first-alias", no_argument, NULL, 'f' },
1331 { "help", no_argument, NULL, 'h' },
1332 { "inverted", no_argument, NULL, 'i'},
1333 { "slabs", no_argument, NULL, 'l' },
1334 { "numa", no_argument, NULL, 'n' },
1335 { "ops", no_argument, NULL, 'o' },
1336 { "shrink", no_argument, NULL, 's' },
1337 { "report", no_argument, NULL, 'r' },
1338 { "Size", no_argument, NULL, 'S'},
1339 { "tracking", no_argument, NULL, 't'},
1340 { "Totals", no_argument, NULL, 'T'},
1341 { "validate", no_argument, NULL, 'v' },
1342 { "zero", no_argument, NULL, 'z' },
1343 { "1ref", no_argument, NULL, '1'},
1344 { "lines", required_argument, NULL, 'N'},
1345 { "Loss", no_argument, NULL, 'L'},
1346 { "Xtotals", no_argument, NULL, 'X'},
1347 { "Bytes", no_argument, NULL, 'B'},
1348 { NULL, 0, NULL, 0 }
1351 int main(int argc, char *argv[])
1355 char *pattern_source;
1357 page_size = getpagesize();
1359 while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTSN:LXB",
1363 show_single_ref = 1;
1373 if (!debug_opt_scan(optarg))
1374 fatal("Invalid debug option '%s'\n", optarg);
1383 show_first_alias = 1;
1423 output_lines = atoi(optarg);
1424 if (output_lines < 1)
1432 if (output_lines == -1)
1434 extended_totals = 1;
1441 fatal("%s: Invalid option '%c'\n", argv[0], optopt);
1445 if (!show_slab && !show_alias && !show_track && !show_report
1446 && !validate && !shrink && !set_debug && !show_ops)
1450 pattern_source = argv[optind];
1452 pattern_source = ".*";
1454 err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
1456 fatal("%s: Invalid pattern '%s' code %d\n",
1457 argv[0], pattern_source, err);
1461 } else if (extended_totals) {
1463 } else if (show_totals) {