1 // SPDX-License-Identifier: GPL-2.0
3 * Slabinfo: Tool to get reports about slabs
5 * (C) 2007 sgi, Christoph Lameter
6 * (C) 2011 Linux Foundation, Christoph Lameter
10 * gcc -o slabinfo slabinfo.c
14 #include <sys/types.h>
25 #define MAX_ALIASES 500
26 #define MAX_NODES 1024
32 int aliases, align, cache_dma, cpu_slabs, destroy_by_rcu;
33 unsigned int hwcache_align, object_size, objs_per_slab;
34 unsigned int sanity_checks, slab_size, store_user, trace;
35 int order, poison, reclaim_account, red_zone;
36 unsigned long partial, objects, slabs, objects_partial, objects_total;
37 unsigned long alloc_fastpath, alloc_slowpath;
38 unsigned long free_fastpath, free_slowpath;
39 unsigned long free_frozen, free_add_partial, free_remove_partial;
40 unsigned long alloc_from_partial, alloc_slab, free_slab, alloc_refill;
41 unsigned long cpuslab_flush, deactivate_full, deactivate_empty;
42 unsigned long deactivate_to_head, deactivate_to_tail;
43 unsigned long deactivate_remote_frees, order_fallback;
44 unsigned long cmpxchg_double_cpu_fail, cmpxchg_double_fail;
45 unsigned long alloc_node_mismatch, deactivate_bypass;
46 unsigned long cpu_partial_alloc, cpu_partial_free;
48 int numa_partial[MAX_NODES];
49 } slabinfo[MAX_SLABS];
54 struct slabinfo *slab;
55 } aliasinfo[MAX_ALIASES];
83 int output_lines = -1;
100 static void fatal(const char *x, ...)
105 vfprintf(stderr, x, ap);
110 static void usage(void)
112 printf("slabinfo 4/15/2011. (c) 2007 sgi/(c) 2011 Linux Foundation.\n\n"
113 "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
114 "-a|--aliases Show aliases\n"
115 "-A|--activity Most active slabs first\n"
116 "-d<options>|--debug=<options> Set/Clear Debug options\n"
117 "-D|--display-active Switch line format to activity\n"
118 "-e|--empty Show empty slabs\n"
119 "-f|--first-alias Show first alias\n"
120 "-h|--help Show usage information\n"
121 "-i|--inverted Inverted list\n"
122 "-l|--slabs Show slabs\n"
123 "-n|--numa Show NUMA information\n"
124 "-o|--ops Show kmem_cache_ops\n"
125 "-s|--shrink Shrink slabs\n"
126 "-r|--report Detailed report on single slabs\n"
127 "-S|--Size Sort by size\n"
128 "-t|--tracking Show alloc/free information\n"
129 "-T|--Totals Show summary information\n"
130 "-v|--validate Validate slabs\n"
131 "-z|--zero Include empty slabs\n"
132 "-1|--1ref Single reference\n"
133 "-N|--lines=K Show the first K slabs\n"
134 "-L|--Loss Sort by loss\n"
135 "-X|--Xtotals Show extended summary information\n"
136 "-B|--Bytes Show size in bytes\n"
137 "-U|--Unreclaim Show unreclaimable slabs only\n"
138 "\nValid debug options (FZPUT may be combined)\n"
139 "a / A Switch on all debug options (=FZUP)\n"
140 "- Switch off all debug options\n"
141 "f / F Sanity Checks (SLAB_CONSISTENCY_CHECKS)\n"
149 static unsigned long read_obj(const char *name)
151 FILE *f = fopen(name, "r");
156 if (!fgets(buffer, sizeof(buffer), f))
159 if (buffer[strlen(buffer)] == '\n')
160 buffer[strlen(buffer)] = 0;
162 return strlen(buffer);
167 * Get the contents of an attribute
169 static unsigned long get_obj(const char *name)
177 static unsigned long get_obj_and_str(const char *name, char **x)
179 unsigned long result = 0;
184 if (!read_obj(name)) {
188 result = strtoul(buffer, &p, 10);
196 static void set_obj(struct slabinfo *s, const char *name, int n)
201 snprintf(x, 100, "%s/%s", s->name, name);
204 fatal("Cannot write to %s\n", x);
206 fprintf(f, "%d\n", n);
210 static unsigned long read_slab_obj(struct slabinfo *s, const char *name)
216 snprintf(x, 100, "%s/%s", s->name, name);
222 l = fread(buffer, 1, sizeof(buffer), f);
231 * Put a size string together
233 static int store_size(char *buffer, unsigned long value)
235 unsigned long divisor = 1;
240 if (value > 1000000000UL) {
241 divisor = 100000000UL;
243 } else if (value > 1000000UL) {
246 } else if (value > 1000UL) {
253 n = sprintf(buffer, "%ld",value);
260 memmove(buffer + n - 2, buffer + n - 3, 4);
267 static void decode_numa_list(int *numa, char *t)
272 memset(numa, 0, MAX_NODES * sizeof(int));
279 node = strtoul(t, &t, 10);
282 nr = strtoul(t, &t, 10);
284 if (node > highest_node)
292 static void slab_validate(struct slabinfo *s)
294 if (strcmp(s->name, "*") == 0)
297 set_obj(s, "validate", 1);
300 static void slab_shrink(struct slabinfo *s)
302 if (strcmp(s->name, "*") == 0)
305 set_obj(s, "shrink", 1);
310 static void first_line(void)
313 printf("Name Objects Alloc Free"
314 " %%Fast Fallb O CmpX UL\n");
316 printf("Name Objects Objsize %s "
317 "Slabs/Part/Cpu O/S O %%Fr %%Ef Flg\n",
318 sort_loss ? " Loss" : "Space");
322 * Find the shortest alias of a slab
324 static struct aliasinfo *find_one_alias(struct slabinfo *find)
327 struct aliasinfo *best = NULL;
329 for(a = aliasinfo;a < aliasinfo + aliases; a++) {
330 if (a->slab == find &&
331 (!best || strlen(best->name) < strlen(a->name))) {
333 if (strncmp(a->name,"kmall", 5) == 0)
340 static unsigned long slab_size(struct slabinfo *s)
342 return s->slabs * (page_size << s->order);
345 static unsigned long slab_activity(struct slabinfo *s)
347 return s->alloc_fastpath + s->free_fastpath +
348 s->alloc_slowpath + s->free_slowpath;
351 static unsigned long slab_waste(struct slabinfo *s)
353 return slab_size(s) - s->objects * s->object_size;
356 static void slab_numa(struct slabinfo *s, int mode)
360 if (strcmp(s->name, "*") == 0)
364 printf("\n%s: No NUMA information available.\n", s->name);
368 if (skip_zero && !s->slabs)
372 printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
373 for(node = 0; node <= highest_node; node++)
374 printf(" %4d", node);
375 printf("\n----------------------");
376 for(node = 0; node <= highest_node; node++)
380 printf("%-21s ", mode ? "All slabs" : s->name);
381 for(node = 0; node <= highest_node; node++) {
384 store_size(b, s->numa[node]);
389 printf("%-21s ", "Partial slabs");
390 for(node = 0; node <= highest_node; node++) {
393 store_size(b, s->numa_partial[node]);
401 static void show_tracking(struct slabinfo *s)
403 printf("\n%s: Kernel object allocation\n", s->name);
404 printf("-----------------------------------------------------------------------\n");
405 if (read_slab_obj(s, "alloc_calls"))
406 printf("%s", buffer);
410 printf("\n%s: Kernel object freeing\n", s->name);
411 printf("------------------------------------------------------------------------\n");
412 if (read_slab_obj(s, "free_calls"))
413 printf("%s", buffer);
419 static void ops(struct slabinfo *s)
421 if (strcmp(s->name, "*") == 0)
424 if (read_slab_obj(s, "ops")) {
425 printf("\n%s: kmem_cache operations\n", s->name);
426 printf("--------------------------------------------\n");
427 printf("%s", buffer);
429 printf("\n%s has no kmem_cache operations\n", s->name);
432 static const char *onoff(int x)
439 static void slab_stats(struct slabinfo *s)
441 unsigned long total_alloc;
442 unsigned long total_free;
448 total_alloc = s->alloc_fastpath + s->alloc_slowpath;
449 total_free = s->free_fastpath + s->free_slowpath;
455 printf("Slab Perf Counter Alloc Free %%Al %%Fr\n");
456 printf("--------------------------------------------------\n");
457 printf("Fastpath %8lu %8lu %3lu %3lu\n",
458 s->alloc_fastpath, s->free_fastpath,
459 s->alloc_fastpath * 100 / total_alloc,
460 total_free ? s->free_fastpath * 100 / total_free : 0);
461 printf("Slowpath %8lu %8lu %3lu %3lu\n",
462 total_alloc - s->alloc_fastpath, s->free_slowpath,
463 (total_alloc - s->alloc_fastpath) * 100 / total_alloc,
464 total_free ? s->free_slowpath * 100 / total_free : 0);
465 printf("Page Alloc %8lu %8lu %3lu %3lu\n",
466 s->alloc_slab, s->free_slab,
467 s->alloc_slab * 100 / total_alloc,
468 total_free ? s->free_slab * 100 / total_free : 0);
469 printf("Add partial %8lu %8lu %3lu %3lu\n",
470 s->deactivate_to_head + s->deactivate_to_tail,
472 (s->deactivate_to_head + s->deactivate_to_tail) * 100 / total_alloc,
473 total_free ? s->free_add_partial * 100 / total_free : 0);
474 printf("Remove partial %8lu %8lu %3lu %3lu\n",
475 s->alloc_from_partial, s->free_remove_partial,
476 s->alloc_from_partial * 100 / total_alloc,
477 total_free ? s->free_remove_partial * 100 / total_free : 0);
479 printf("Cpu partial list %8lu %8lu %3lu %3lu\n",
480 s->cpu_partial_alloc, s->cpu_partial_free,
481 s->cpu_partial_alloc * 100 / total_alloc,
482 total_free ? s->cpu_partial_free * 100 / total_free : 0);
484 printf("RemoteObj/SlabFrozen %8lu %8lu %3lu %3lu\n",
485 s->deactivate_remote_frees, s->free_frozen,
486 s->deactivate_remote_frees * 100 / total_alloc,
487 total_free ? s->free_frozen * 100 / total_free : 0);
489 printf("Total %8lu %8lu\n\n", total_alloc, total_free);
491 if (s->cpuslab_flush)
492 printf("Flushes %8lu\n", s->cpuslab_flush);
494 total = s->deactivate_full + s->deactivate_empty +
495 s->deactivate_to_head + s->deactivate_to_tail + s->deactivate_bypass;
498 printf("\nSlab Deactivation Occurrences %%\n");
499 printf("-------------------------------------------------\n");
500 printf("Slab full %7lu %3lu%%\n",
501 s->deactivate_full, (s->deactivate_full * 100) / total);
502 printf("Slab empty %7lu %3lu%%\n",
503 s->deactivate_empty, (s->deactivate_empty * 100) / total);
504 printf("Moved to head of partial list %7lu %3lu%%\n",
505 s->deactivate_to_head, (s->deactivate_to_head * 100) / total);
506 printf("Moved to tail of partial list %7lu %3lu%%\n",
507 s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total);
508 printf("Deactivation bypass %7lu %3lu%%\n",
509 s->deactivate_bypass, (s->deactivate_bypass * 100) / total);
510 printf("Refilled from foreign frees %7lu %3lu%%\n",
511 s->alloc_refill, (s->alloc_refill * 100) / total);
512 printf("Node mismatch %7lu %3lu%%\n",
513 s->alloc_node_mismatch, (s->alloc_node_mismatch * 100) / total);
516 if (s->cmpxchg_double_fail || s->cmpxchg_double_cpu_fail) {
517 printf("\nCmpxchg_double Looping\n------------------------\n");
518 printf("Locked Cmpxchg Double redos %lu\nUnlocked Cmpxchg Double redos %lu\n",
519 s->cmpxchg_double_fail, s->cmpxchg_double_cpu_fail);
523 static void report(struct slabinfo *s)
525 if (strcmp(s->name, "*") == 0)
528 printf("\nSlabcache: %-15s Aliases: %2d Order : %2d Objects: %lu\n",
529 s->name, s->aliases, s->order, s->objects);
530 if (s->hwcache_align)
531 printf("** Hardware cacheline aligned\n");
533 printf("** Memory is allocated in a special DMA zone\n");
534 if (s->destroy_by_rcu)
535 printf("** Slabs are destroyed via RCU\n");
536 if (s->reclaim_account)
537 printf("** Reclaim accounting active\n");
539 printf("\nSizes (bytes) Slabs Debug Memory\n");
540 printf("------------------------------------------------------------------------\n");
541 printf("Object : %7d Total : %7ld Sanity Checks : %s Total: %7ld\n",
542 s->object_size, s->slabs, onoff(s->sanity_checks),
543 s->slabs * (page_size << s->order));
544 printf("SlabObj: %7d Full : %7ld Redzoning : %s Used : %7ld\n",
545 s->slab_size, s->slabs - s->partial - s->cpu_slabs,
546 onoff(s->red_zone), s->objects * s->object_size);
547 printf("SlabSiz: %7d Partial: %7ld Poisoning : %s Loss : %7ld\n",
548 page_size << s->order, s->partial, onoff(s->poison),
549 s->slabs * (page_size << s->order) - s->objects * s->object_size);
550 printf("Loss : %7d CpuSlab: %7d Tracking : %s Lalig: %7ld\n",
551 s->slab_size - s->object_size, s->cpu_slabs, onoff(s->store_user),
552 (s->slab_size - s->object_size) * s->objects);
553 printf("Align : %7d Objects: %7d Tracing : %s Lpadd: %7ld\n",
554 s->align, s->objs_per_slab, onoff(s->trace),
555 ((page_size << s->order) - s->objs_per_slab * s->slab_size) *
564 static void slabcache(struct slabinfo *s)
571 if (strcmp(s->name, "*") == 0)
574 if (unreclaim_only && s->reclaim_account)
577 if (actual_slabs == 1) {
582 if (skip_zero && !show_empty && !s->slabs)
585 if (show_empty && s->slabs)
589 store_size(size_str, slab_size(s));
591 store_size(size_str, slab_waste(s));
592 snprintf(dist_str, 40, "%lu/%lu/%d", s->slabs - s->cpu_slabs,
593 s->partial, s->cpu_slabs);
602 if (s->hwcache_align)
606 if (s->reclaim_account)
610 if (s->sanity_checks)
619 unsigned long total_alloc;
620 unsigned long total_free;
622 total_alloc = s->alloc_fastpath + s->alloc_slowpath;
623 total_free = s->free_fastpath + s->free_slowpath;
625 printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d %4ld %4ld\n",
627 total_alloc, total_free,
628 total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,
629 total_free ? (s->free_fastpath * 100 / total_free) : 0,
630 s->order_fallback, s->order, s->cmpxchg_double_fail,
631 s->cmpxchg_double_cpu_fail);
633 printf("%-21s %8ld %7d %15s %14s %4d %1d %3ld %3ld %s\n",
634 s->name, s->objects, s->object_size, size_str, dist_str,
635 s->objs_per_slab, s->order,
636 s->slabs ? (s->partial * 100) / s->slabs : 100,
637 s->slabs ? (s->objects * s->object_size * 100) /
638 (s->slabs * (page_size << s->order)) : 100,
644 * Analyze debug options. Return false if something is amiss.
646 static int debug_opt_scan(char *opt)
648 if (!opt || !opt[0] || strcmp(opt, "-") == 0)
651 if (strcasecmp(opt, "a") == 0) {
695 static int slab_empty(struct slabinfo *s)
701 * We may still have slabs even if there are no objects. Shrinking will
705 set_obj(s, "shrink", 1);
710 static void slab_debug(struct slabinfo *s)
712 if (strcmp(s->name, "*") == 0)
715 if (sanity && !s->sanity_checks) {
716 set_obj(s, "sanity", 1);
718 if (!sanity && s->sanity_checks) {
720 set_obj(s, "sanity", 0);
722 fprintf(stderr, "%s not empty cannot disable sanity checks\n", s->name);
724 if (redzone && !s->red_zone) {
726 set_obj(s, "red_zone", 1);
728 fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
730 if (!redzone && s->red_zone) {
732 set_obj(s, "red_zone", 0);
734 fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
736 if (poison && !s->poison) {
738 set_obj(s, "poison", 1);
740 fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
742 if (!poison && s->poison) {
744 set_obj(s, "poison", 0);
746 fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
748 if (tracking && !s->store_user) {
750 set_obj(s, "store_user", 1);
752 fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
754 if (!tracking && s->store_user) {
756 set_obj(s, "store_user", 0);
758 fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
760 if (tracing && !s->trace) {
762 set_obj(s, "trace", 1);
764 fprintf(stderr, "%s can only enable trace for one slab at a time\n", s->name);
766 if (!tracing && s->trace)
767 set_obj(s, "trace", 1);
770 static void totals(void)
775 char b1[20], b2[20], b3[20], b4[20];
776 unsigned long long max = 1ULL << 63;
779 unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
781 /* Number of partial slabs in a slabcache */
782 unsigned long long min_partial = max, max_partial = 0,
783 avg_partial, total_partial = 0;
785 /* Number of slabs in a slab cache */
786 unsigned long long min_slabs = max, max_slabs = 0,
787 avg_slabs, total_slabs = 0;
789 /* Size of the whole slab */
790 unsigned long long min_size = max, max_size = 0,
791 avg_size, total_size = 0;
793 /* Bytes used for object storage in a slab */
794 unsigned long long min_used = max, max_used = 0,
795 avg_used, total_used = 0;
797 /* Waste: Bytes used for alignment and padding */
798 unsigned long long min_waste = max, max_waste = 0,
799 avg_waste, total_waste = 0;
800 /* Number of objects in a slab */
801 unsigned long long min_objects = max, max_objects = 0,
802 avg_objects, total_objects = 0;
803 /* Waste per object */
804 unsigned long long min_objwaste = max,
805 max_objwaste = 0, avg_objwaste,
808 /* Memory per object */
809 unsigned long long min_memobj = max,
810 max_memobj = 0, avg_memobj,
813 /* Percentage of partial slabs per slab */
814 unsigned long min_ppart = 100, max_ppart = 0,
815 avg_ppart, total_ppart = 0;
817 /* Number of objects in partial slabs */
818 unsigned long min_partobj = max, max_partobj = 0,
819 avg_partobj, total_partobj = 0;
821 /* Percentage of partial objects of all objects in a slab */
822 unsigned long min_ppartobj = 100, max_ppartobj = 0,
823 avg_ppartobj, total_ppartobj = 0;
826 for (s = slabinfo; s < slabinfo + slabs; s++) {
827 unsigned long long size;
829 unsigned long long wasted;
830 unsigned long long objwaste;
831 unsigned long percentage_partial_slabs;
832 unsigned long percentage_partial_objs;
834 if (!s->slabs || !s->objects)
840 used = s->objects * s->object_size;
841 wasted = size - used;
842 objwaste = s->slab_size - s->object_size;
844 percentage_partial_slabs = s->partial * 100 / s->slabs;
845 if (percentage_partial_slabs > 100)
846 percentage_partial_slabs = 100;
848 percentage_partial_objs = s->objects_partial * 100
851 if (percentage_partial_objs > 100)
852 percentage_partial_objs = 100;
854 if (s->object_size < min_objsize)
855 min_objsize = s->object_size;
856 if (s->partial < min_partial)
857 min_partial = s->partial;
858 if (s->slabs < min_slabs)
859 min_slabs = s->slabs;
862 if (wasted < min_waste)
864 if (objwaste < min_objwaste)
865 min_objwaste = objwaste;
866 if (s->objects < min_objects)
867 min_objects = s->objects;
870 if (s->objects_partial < min_partobj)
871 min_partobj = s->objects_partial;
872 if (percentage_partial_slabs < min_ppart)
873 min_ppart = percentage_partial_slabs;
874 if (percentage_partial_objs < min_ppartobj)
875 min_ppartobj = percentage_partial_objs;
876 if (s->slab_size < min_memobj)
877 min_memobj = s->slab_size;
879 if (s->object_size > max_objsize)
880 max_objsize = s->object_size;
881 if (s->partial > max_partial)
882 max_partial = s->partial;
883 if (s->slabs > max_slabs)
884 max_slabs = s->slabs;
887 if (wasted > max_waste)
889 if (objwaste > max_objwaste)
890 max_objwaste = objwaste;
891 if (s->objects > max_objects)
892 max_objects = s->objects;
895 if (s->objects_partial > max_partobj)
896 max_partobj = s->objects_partial;
897 if (percentage_partial_slabs > max_ppart)
898 max_ppart = percentage_partial_slabs;
899 if (percentage_partial_objs > max_ppartobj)
900 max_ppartobj = percentage_partial_objs;
901 if (s->slab_size > max_memobj)
902 max_memobj = s->slab_size;
904 total_partial += s->partial;
905 total_slabs += s->slabs;
907 total_waste += wasted;
909 total_objects += s->objects;
911 total_partobj += s->objects_partial;
912 total_ppart += percentage_partial_slabs;
913 total_ppartobj += percentage_partial_objs;
915 total_objwaste += s->objects * objwaste;
916 total_objsize += s->objects * s->slab_size;
919 if (!total_objects) {
920 printf("No objects\n");
924 printf("No slabs\n");
928 /* Per slab averages */
929 avg_partial = total_partial / used_slabs;
930 avg_slabs = total_slabs / used_slabs;
931 avg_size = total_size / used_slabs;
932 avg_waste = total_waste / used_slabs;
934 avg_objects = total_objects / used_slabs;
935 avg_used = total_used / used_slabs;
936 avg_partobj = total_partobj / used_slabs;
937 avg_ppart = total_ppart / used_slabs;
938 avg_ppartobj = total_ppartobj / used_slabs;
940 /* Per object object sizes */
941 avg_objsize = total_used / total_objects;
942 avg_objwaste = total_objwaste / total_objects;
943 avg_partobj = total_partobj * 100 / total_objects;
944 avg_memobj = total_objsize / total_objects;
946 printf("Slabcache Totals\n");
947 printf("----------------\n");
948 printf("Slabcaches : %15d Aliases : %11d->%-3d Active: %3d\n",
949 slabs, aliases, alias_targets, used_slabs);
951 store_size(b1, total_size);store_size(b2, total_waste);
952 store_size(b3, total_waste * 100 / total_used);
953 printf("Memory used: %15s # Loss : %15s MRatio:%6s%%\n", b1, b2, b3);
955 store_size(b1, total_objects);store_size(b2, total_partobj);
956 store_size(b3, total_partobj * 100 / total_objects);
957 printf("# Objects : %15s # PartObj: %15s ORatio:%6s%%\n", b1, b2, b3);
960 printf("Per Cache Average "
962 printf("---------------------------------------"
963 "-------------------------------------\n");
965 store_size(b1, avg_objects);store_size(b2, min_objects);
966 store_size(b3, max_objects);store_size(b4, total_objects);
967 printf("#Objects %15s %15s %15s %15s\n",
970 store_size(b1, avg_slabs);store_size(b2, min_slabs);
971 store_size(b3, max_slabs);store_size(b4, total_slabs);
972 printf("#Slabs %15s %15s %15s %15s\n",
975 store_size(b1, avg_partial);store_size(b2, min_partial);
976 store_size(b3, max_partial);store_size(b4, total_partial);
977 printf("#PartSlab %15s %15s %15s %15s\n",
979 store_size(b1, avg_ppart);store_size(b2, min_ppart);
980 store_size(b3, max_ppart);
981 store_size(b4, total_partial * 100 / total_slabs);
982 printf("%%PartSlab%15s%% %15s%% %15s%% %15s%%\n",
985 store_size(b1, avg_partobj);store_size(b2, min_partobj);
986 store_size(b3, max_partobj);
987 store_size(b4, total_partobj);
988 printf("PartObjs %15s %15s %15s %15s\n",
991 store_size(b1, avg_ppartobj);store_size(b2, min_ppartobj);
992 store_size(b3, max_ppartobj);
993 store_size(b4, total_partobj * 100 / total_objects);
994 printf("%% PartObj%15s%% %15s%% %15s%% %15s%%\n",
997 store_size(b1, avg_size);store_size(b2, min_size);
998 store_size(b3, max_size);store_size(b4, total_size);
999 printf("Memory %15s %15s %15s %15s\n",
1002 store_size(b1, avg_used);store_size(b2, min_used);
1003 store_size(b3, max_used);store_size(b4, total_used);
1004 printf("Used %15s %15s %15s %15s\n",
1007 store_size(b1, avg_waste);store_size(b2, min_waste);
1008 store_size(b3, max_waste);store_size(b4, total_waste);
1009 printf("Loss %15s %15s %15s %15s\n",
1013 printf("Per Object Average "
1015 printf("---------------------------------------"
1016 "--------------------\n");
1018 store_size(b1, avg_memobj);store_size(b2, min_memobj);
1019 store_size(b3, max_memobj);
1020 printf("Memory %15s %15s %15s\n",
1022 store_size(b1, avg_objsize);store_size(b2, min_objsize);
1023 store_size(b3, max_objsize);
1024 printf("User %15s %15s %15s\n",
1027 store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
1028 store_size(b3, max_objwaste);
1029 printf("Loss %15s %15s %15s\n",
1033 static void sort_slabs(void)
1035 struct slabinfo *s1,*s2;
1037 for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
1038 for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
1042 result = slab_size(s1) < slab_size(s2);
1043 else if (sort_active)
1044 result = slab_activity(s1) < slab_activity(s2);
1046 result = slab_waste(s1) < slab_waste(s2);
1048 result = strcasecmp(s1->name, s2->name);
1056 memcpy(&t, s1, sizeof(struct slabinfo));
1057 memcpy(s1, s2, sizeof(struct slabinfo));
1058 memcpy(s2, &t, sizeof(struct slabinfo));
1064 static void sort_aliases(void)
1066 struct aliasinfo *a1,*a2;
1068 for (a1 = aliasinfo; a1 < aliasinfo + aliases; a1++) {
1069 for (a2 = a1 + 1; a2 < aliasinfo + aliases; a2++) {
1074 if (show_alias && !show_inverted) {
1078 if (strcasecmp(n1, n2) > 0) {
1081 memcpy(&t, a1, sizeof(struct aliasinfo));
1082 memcpy(a1, a2, sizeof(struct aliasinfo));
1083 memcpy(a2, &t, sizeof(struct aliasinfo));
1089 static void link_slabs(void)
1091 struct aliasinfo *a;
1094 for (a = aliasinfo; a < aliasinfo + aliases; a++) {
1096 for (s = slabinfo; s < slabinfo + slabs; s++)
1097 if (strcmp(a->ref, s->name) == 0) {
1102 if (s == slabinfo + slabs)
1103 fatal("Unresolved alias %s\n", a->ref);
1107 static void alias(void)
1109 struct aliasinfo *a;
1110 char *active = NULL;
1115 for(a = aliasinfo; a < aliasinfo + aliases; a++) {
1117 if (!show_single_ref && a->slab->refs == 1)
1120 if (!show_inverted) {
1122 if (strcmp(a->slab->name, active) == 0) {
1123 printf(" %s", a->name);
1127 printf("\n%-12s <- %s", a->slab->name, a->name);
1128 active = a->slab->name;
1131 printf("%-15s -> %s\n", a->name, a->slab->name);
1138 static void rename_slabs(void)
1141 struct aliasinfo *a;
1143 for (s = slabinfo; s < slabinfo + slabs; s++) {
1144 if (*s->name != ':')
1147 if (s->refs > 1 && !show_first_alias)
1150 a = find_one_alias(s);
1161 static int slab_mismatch(char *slab)
1163 return regexec(&pattern, slab, 0, NULL, 0);
1166 static void read_slab_dir(void)
1170 struct slabinfo *slab = slabinfo;
1171 struct aliasinfo *alias = aliasinfo;
1176 if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
1177 fatal("SYSFS support for SLUB not active\n");
1180 while ((de = readdir(dir))) {
1181 if (de->d_name[0] == '.' ||
1182 (de->d_name[0] != ':' && slab_mismatch(de->d_name)))
1184 switch (de->d_type) {
1186 alias->name = strdup(de->d_name);
1187 count = readlink(de->d_name, buffer, sizeof(buffer)-1);
1190 fatal("Cannot read symlink %s\n", de->d_name);
1194 while (p > buffer && p[-1] != '/')
1196 alias->ref = strdup(p);
1200 if (chdir(de->d_name))
1201 fatal("Unable to access slab %s\n", slab->name);
1202 slab->name = strdup(de->d_name);
1205 slab->aliases = get_obj("aliases");
1206 slab->align = get_obj("align");
1207 slab->cache_dma = get_obj("cache_dma");
1208 slab->cpu_slabs = get_obj("cpu_slabs");
1209 slab->destroy_by_rcu = get_obj("destroy_by_rcu");
1210 slab->hwcache_align = get_obj("hwcache_align");
1211 slab->object_size = get_obj("object_size");
1212 slab->objects = get_obj("objects");
1213 slab->objects_partial = get_obj("objects_partial");
1214 slab->objects_total = get_obj("objects_total");
1215 slab->objs_per_slab = get_obj("objs_per_slab");
1216 slab->order = get_obj("order");
1217 slab->partial = get_obj("partial");
1218 slab->partial = get_obj_and_str("partial", &t);
1219 decode_numa_list(slab->numa_partial, t);
1221 slab->poison = get_obj("poison");
1222 slab->reclaim_account = get_obj("reclaim_account");
1223 slab->red_zone = get_obj("red_zone");
1224 slab->sanity_checks = get_obj("sanity_checks");
1225 slab->slab_size = get_obj("slab_size");
1226 slab->slabs = get_obj_and_str("slabs", &t);
1227 decode_numa_list(slab->numa, t);
1229 slab->store_user = get_obj("store_user");
1230 slab->trace = get_obj("trace");
1231 slab->alloc_fastpath = get_obj("alloc_fastpath");
1232 slab->alloc_slowpath = get_obj("alloc_slowpath");
1233 slab->free_fastpath = get_obj("free_fastpath");
1234 slab->free_slowpath = get_obj("free_slowpath");
1235 slab->free_frozen= get_obj("free_frozen");
1236 slab->free_add_partial = get_obj("free_add_partial");
1237 slab->free_remove_partial = get_obj("free_remove_partial");
1238 slab->alloc_from_partial = get_obj("alloc_from_partial");
1239 slab->alloc_slab = get_obj("alloc_slab");
1240 slab->alloc_refill = get_obj("alloc_refill");
1241 slab->free_slab = get_obj("free_slab");
1242 slab->cpuslab_flush = get_obj("cpuslab_flush");
1243 slab->deactivate_full = get_obj("deactivate_full");
1244 slab->deactivate_empty = get_obj("deactivate_empty");
1245 slab->deactivate_to_head = get_obj("deactivate_to_head");
1246 slab->deactivate_to_tail = get_obj("deactivate_to_tail");
1247 slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
1248 slab->order_fallback = get_obj("order_fallback");
1249 slab->cmpxchg_double_cpu_fail = get_obj("cmpxchg_double_cpu_fail");
1250 slab->cmpxchg_double_fail = get_obj("cmpxchg_double_fail");
1251 slab->cpu_partial_alloc = get_obj("cpu_partial_alloc");
1252 slab->cpu_partial_free = get_obj("cpu_partial_free");
1253 slab->alloc_node_mismatch = get_obj("alloc_node_mismatch");
1254 slab->deactivate_bypass = get_obj("deactivate_bypass");
1256 if (slab->name[0] == ':')
1261 fatal("Unknown file type %lx\n", de->d_type);
1265 slabs = slab - slabinfo;
1266 actual_slabs = slabs;
1267 aliases = alias - aliasinfo;
1268 if (slabs > MAX_SLABS)
1269 fatal("Too many slabs\n");
1270 if (aliases > MAX_ALIASES)
1271 fatal("Too many aliases\n");
1274 static void output_slabs(void)
1276 struct slabinfo *slab;
1277 int lines = output_lines;
1279 for (slab = slabinfo; (slab < slabinfo + slabs) &&
1280 lines != 0; slab++) {
1290 else if (show_track)
1291 show_tracking(slab);
1293 slab_validate(slab);
1302 else if (show_report)
1307 static void xtotals(void)
1314 printf("\nSlabs sorted by size\n");
1315 printf("--------------------\n");
1321 printf("\nSlabs sorted by loss\n");
1322 printf("--------------------\n");
1331 struct option opts[] = {
1332 { "aliases", no_argument, NULL, 'a' },
1333 { "activity", no_argument, NULL, 'A' },
1334 { "debug", optional_argument, NULL, 'd' },
1335 { "display-activity", no_argument, NULL, 'D' },
1336 { "empty", no_argument, NULL, 'e' },
1337 { "first-alias", no_argument, NULL, 'f' },
1338 { "help", no_argument, NULL, 'h' },
1339 { "inverted", no_argument, NULL, 'i'},
1340 { "slabs", no_argument, NULL, 'l' },
1341 { "numa", no_argument, NULL, 'n' },
1342 { "ops", no_argument, NULL, 'o' },
1343 { "shrink", no_argument, NULL, 's' },
1344 { "report", no_argument, NULL, 'r' },
1345 { "Size", no_argument, NULL, 'S'},
1346 { "tracking", no_argument, NULL, 't'},
1347 { "Totals", no_argument, NULL, 'T'},
1348 { "validate", no_argument, NULL, 'v' },
1349 { "zero", no_argument, NULL, 'z' },
1350 { "1ref", no_argument, NULL, '1'},
1351 { "lines", required_argument, NULL, 'N'},
1352 { "Loss", no_argument, NULL, 'L'},
1353 { "Xtotals", no_argument, NULL, 'X'},
1354 { "Bytes", no_argument, NULL, 'B'},
1355 { "Unreclaim", no_argument, NULL, 'U'},
1356 { NULL, 0, NULL, 0 }
1359 int main(int argc, char *argv[])
1363 char *pattern_source;
1365 page_size = getpagesize();
1367 while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTSN:LXBU",
1371 show_single_ref = 1;
1381 if (!debug_opt_scan(optarg))
1382 fatal("Invalid debug option '%s'\n", optarg);
1391 show_first_alias = 1;
1431 output_lines = atoi(optarg);
1432 if (output_lines < 1)
1440 if (output_lines == -1)
1442 extended_totals = 1;
1452 fatal("%s: Invalid option '%c'\n", argv[0], optopt);
1456 if (!show_slab && !show_alias && !show_track && !show_report
1457 && !validate && !shrink && !set_debug && !show_ops)
1461 pattern_source = argv[optind];
1463 pattern_source = ".*";
1465 err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
1467 fatal("%s: Invalid pattern '%s' code %d\n",
1468 argv[0], pattern_source, err);
1472 } else if (extended_totals) {
1474 } else if (show_totals) {