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];
84 int output_lines = -1;
101 static void fatal(const char *x, ...)
106 vfprintf(stderr, x, ap);
111 static void usage(void)
113 printf("slabinfo 4/15/2011. (c) 2007 sgi/(c) 2011 Linux Foundation.\n\n"
114 "slabinfo [-aABDefhilLnoPrsStTUvXz1] [N=K] [-dafzput] [slab-regexp]\n"
115 "-a|--aliases Show aliases\n"
116 "-A|--activity Most active slabs first\n"
117 "-B|--Bytes Show size in bytes\n"
118 "-D|--display-active Switch line format to activity\n"
119 "-e|--empty Show empty slabs\n"
120 "-f|--first-alias Show first alias\n"
121 "-h|--help Show usage information\n"
122 "-i|--inverted Inverted list\n"
123 "-l|--slabs Show slabs\n"
124 "-L|--Loss Sort by loss\n"
125 "-n|--numa Show NUMA information\n"
126 "-N|--lines=K Show the first K slabs\n"
127 "-o|--ops Show kmem_cache_ops\n"
128 "-P|--partial Sort by number of partial slabs\n"
129 "-r|--report Detailed report on single slabs\n"
130 "-s|--shrink Shrink slabs\n"
131 "-S|--Size Sort by size\n"
132 "-t|--tracking Show alloc/free information\n"
133 "-T|--Totals Show summary information\n"
134 "-U|--Unreclaim Show unreclaimable slabs only\n"
135 "-v|--validate Validate slabs\n"
136 "-X|--Xtotals Show extended summary information\n"
137 "-z|--zero Include empty slabs\n"
138 "-1|--1ref Single reference\n"
141 "-d | --debug Switch off all debug options\n"
142 "-da | --debug=a Switch on all debug options (--debug=FZPU)\n"
145 "-d[afzput] | --debug=[afzput]\n"
146 " f | F Sanity Checks (SLAB_CONSISTENCY_CHECKS)\n"
152 "\nSorting options (--Loss, --Size, --Partial) are mutually exclusive\n"
156 static unsigned long read_obj(const char *name)
158 FILE *f = fopen(name, "r");
163 if (!fgets(buffer, sizeof(buffer), f))
166 if (buffer[strlen(buffer)] == '\n')
167 buffer[strlen(buffer)] = 0;
169 return strlen(buffer);
174 * Get the contents of an attribute
176 static unsigned long get_obj(const char *name)
184 static unsigned long get_obj_and_str(const char *name, char **x)
186 unsigned long result = 0;
191 if (!read_obj(name)) {
195 result = strtoul(buffer, &p, 10);
203 static void set_obj(struct slabinfo *s, const char *name, int n)
208 snprintf(x, 100, "%s/%s", s->name, name);
211 fatal("Cannot write to %s\n", x);
213 fprintf(f, "%d\n", n);
217 static unsigned long read_slab_obj(struct slabinfo *s, const char *name)
223 snprintf(x, 100, "%s/%s", s->name, name);
229 l = fread(buffer, 1, sizeof(buffer), f);
238 * Put a size string together
240 static int store_size(char *buffer, unsigned long value)
242 unsigned long divisor = 1;
247 if (value > 1000000000UL) {
248 divisor = 100000000UL;
250 } else if (value > 1000000UL) {
253 } else if (value > 1000UL) {
260 n = sprintf(buffer, "%ld",value);
267 memmove(buffer + n - 2, buffer + n - 3, 4);
274 static void decode_numa_list(int *numa, char *t)
279 memset(numa, 0, MAX_NODES * sizeof(int));
286 node = strtoul(t, &t, 10);
289 nr = strtoul(t, &t, 10);
291 if (node > highest_node)
299 static void slab_validate(struct slabinfo *s)
301 if (strcmp(s->name, "*") == 0)
304 set_obj(s, "validate", 1);
307 static void slab_shrink(struct slabinfo *s)
309 if (strcmp(s->name, "*") == 0)
312 set_obj(s, "shrink", 1);
317 static void first_line(void)
320 printf("Name Objects Alloc Free"
321 " %%Fast Fallb O CmpX UL\n");
323 printf("Name Objects Objsize %s "
324 "Slabs/Part/Cpu O/S O %%Fr %%Ef Flg\n",
325 sort_loss ? " Loss" : "Space");
329 * Find the shortest alias of a slab
331 static struct aliasinfo *find_one_alias(struct slabinfo *find)
334 struct aliasinfo *best = NULL;
336 for(a = aliasinfo;a < aliasinfo + aliases; a++) {
337 if (a->slab == find &&
338 (!best || strlen(best->name) < strlen(a->name))) {
340 if (strncmp(a->name,"kmall", 5) == 0)
347 static unsigned long slab_size(struct slabinfo *s)
349 return s->slabs * (page_size << s->order);
352 static unsigned long slab_activity(struct slabinfo *s)
354 return s->alloc_fastpath + s->free_fastpath +
355 s->alloc_slowpath + s->free_slowpath;
358 static unsigned long slab_waste(struct slabinfo *s)
360 return slab_size(s) - s->objects * s->object_size;
363 static void slab_numa(struct slabinfo *s, int mode)
367 if (strcmp(s->name, "*") == 0)
371 printf("\n%s: No NUMA information available.\n", s->name);
375 if (skip_zero && !s->slabs)
379 printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
380 for(node = 0; node <= highest_node; node++)
381 printf(" %4d", node);
382 printf("\n----------------------");
383 for(node = 0; node <= highest_node; node++)
387 printf("%-21s ", mode ? "All slabs" : s->name);
388 for(node = 0; node <= highest_node; node++) {
391 store_size(b, s->numa[node]);
396 printf("%-21s ", "Partial slabs");
397 for(node = 0; node <= highest_node; node++) {
400 store_size(b, s->numa_partial[node]);
408 static void show_tracking(struct slabinfo *s)
410 printf("\n%s: Kernel object allocation\n", s->name);
411 printf("-----------------------------------------------------------------------\n");
412 if (read_slab_obj(s, "alloc_calls"))
413 printf("%s", buffer);
417 printf("\n%s: Kernel object freeing\n", s->name);
418 printf("------------------------------------------------------------------------\n");
419 if (read_slab_obj(s, "free_calls"))
420 printf("%s", buffer);
426 static void ops(struct slabinfo *s)
428 if (strcmp(s->name, "*") == 0)
431 if (read_slab_obj(s, "ops")) {
432 printf("\n%s: kmem_cache operations\n", s->name);
433 printf("--------------------------------------------\n");
434 printf("%s", buffer);
436 printf("\n%s has no kmem_cache operations\n", s->name);
439 static const char *onoff(int x)
446 static void slab_stats(struct slabinfo *s)
448 unsigned long total_alloc;
449 unsigned long total_free;
455 total_alloc = s->alloc_fastpath + s->alloc_slowpath;
456 total_free = s->free_fastpath + s->free_slowpath;
462 printf("Slab Perf Counter Alloc Free %%Al %%Fr\n");
463 printf("--------------------------------------------------\n");
464 printf("Fastpath %8lu %8lu %3lu %3lu\n",
465 s->alloc_fastpath, s->free_fastpath,
466 s->alloc_fastpath * 100 / total_alloc,
467 total_free ? s->free_fastpath * 100 / total_free : 0);
468 printf("Slowpath %8lu %8lu %3lu %3lu\n",
469 total_alloc - s->alloc_fastpath, s->free_slowpath,
470 (total_alloc - s->alloc_fastpath) * 100 / total_alloc,
471 total_free ? s->free_slowpath * 100 / total_free : 0);
472 printf("Page Alloc %8lu %8lu %3lu %3lu\n",
473 s->alloc_slab, s->free_slab,
474 s->alloc_slab * 100 / total_alloc,
475 total_free ? s->free_slab * 100 / total_free : 0);
476 printf("Add partial %8lu %8lu %3lu %3lu\n",
477 s->deactivate_to_head + s->deactivate_to_tail,
479 (s->deactivate_to_head + s->deactivate_to_tail) * 100 / total_alloc,
480 total_free ? s->free_add_partial * 100 / total_free : 0);
481 printf("Remove partial %8lu %8lu %3lu %3lu\n",
482 s->alloc_from_partial, s->free_remove_partial,
483 s->alloc_from_partial * 100 / total_alloc,
484 total_free ? s->free_remove_partial * 100 / total_free : 0);
486 printf("Cpu partial list %8lu %8lu %3lu %3lu\n",
487 s->cpu_partial_alloc, s->cpu_partial_free,
488 s->cpu_partial_alloc * 100 / total_alloc,
489 total_free ? s->cpu_partial_free * 100 / total_free : 0);
491 printf("RemoteObj/SlabFrozen %8lu %8lu %3lu %3lu\n",
492 s->deactivate_remote_frees, s->free_frozen,
493 s->deactivate_remote_frees * 100 / total_alloc,
494 total_free ? s->free_frozen * 100 / total_free : 0);
496 printf("Total %8lu %8lu\n\n", total_alloc, total_free);
498 if (s->cpuslab_flush)
499 printf("Flushes %8lu\n", s->cpuslab_flush);
501 total = s->deactivate_full + s->deactivate_empty +
502 s->deactivate_to_head + s->deactivate_to_tail + s->deactivate_bypass;
505 printf("\nSlab Deactivation Occurrences %%\n");
506 printf("-------------------------------------------------\n");
507 printf("Slab full %7lu %3lu%%\n",
508 s->deactivate_full, (s->deactivate_full * 100) / total);
509 printf("Slab empty %7lu %3lu%%\n",
510 s->deactivate_empty, (s->deactivate_empty * 100) / total);
511 printf("Moved to head of partial list %7lu %3lu%%\n",
512 s->deactivate_to_head, (s->deactivate_to_head * 100) / total);
513 printf("Moved to tail of partial list %7lu %3lu%%\n",
514 s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total);
515 printf("Deactivation bypass %7lu %3lu%%\n",
516 s->deactivate_bypass, (s->deactivate_bypass * 100) / total);
517 printf("Refilled from foreign frees %7lu %3lu%%\n",
518 s->alloc_refill, (s->alloc_refill * 100) / total);
519 printf("Node mismatch %7lu %3lu%%\n",
520 s->alloc_node_mismatch, (s->alloc_node_mismatch * 100) / total);
523 if (s->cmpxchg_double_fail || s->cmpxchg_double_cpu_fail) {
524 printf("\nCmpxchg_double Looping\n------------------------\n");
525 printf("Locked Cmpxchg Double redos %lu\nUnlocked Cmpxchg Double redos %lu\n",
526 s->cmpxchg_double_fail, s->cmpxchg_double_cpu_fail);
530 static void report(struct slabinfo *s)
532 if (strcmp(s->name, "*") == 0)
535 printf("\nSlabcache: %-15s Aliases: %2d Order : %2d Objects: %lu\n",
536 s->name, s->aliases, s->order, s->objects);
537 if (s->hwcache_align)
538 printf("** Hardware cacheline aligned\n");
540 printf("** Memory is allocated in a special DMA zone\n");
541 if (s->destroy_by_rcu)
542 printf("** Slabs are destroyed via RCU\n");
543 if (s->reclaim_account)
544 printf("** Reclaim accounting active\n");
546 printf("\nSizes (bytes) Slabs Debug Memory\n");
547 printf("------------------------------------------------------------------------\n");
548 printf("Object : %7d Total : %7ld Sanity Checks : %s Total: %7ld\n",
549 s->object_size, s->slabs, onoff(s->sanity_checks),
550 s->slabs * (page_size << s->order));
551 printf("SlabObj: %7d Full : %7ld Redzoning : %s Used : %7ld\n",
552 s->slab_size, s->slabs - s->partial - s->cpu_slabs,
553 onoff(s->red_zone), s->objects * s->object_size);
554 printf("SlabSiz: %7d Partial: %7ld Poisoning : %s Loss : %7ld\n",
555 page_size << s->order, s->partial, onoff(s->poison),
556 s->slabs * (page_size << s->order) - s->objects * s->object_size);
557 printf("Loss : %7d CpuSlab: %7d Tracking : %s Lalig: %7ld\n",
558 s->slab_size - s->object_size, s->cpu_slabs, onoff(s->store_user),
559 (s->slab_size - s->object_size) * s->objects);
560 printf("Align : %7d Objects: %7d Tracing : %s Lpadd: %7ld\n",
561 s->align, s->objs_per_slab, onoff(s->trace),
562 ((page_size << s->order) - s->objs_per_slab * s->slab_size) *
571 static void slabcache(struct slabinfo *s)
578 if (strcmp(s->name, "*") == 0)
581 if (unreclaim_only && s->reclaim_account)
584 if (actual_slabs == 1) {
589 if (skip_zero && !show_empty && !s->slabs)
592 if (show_empty && s->slabs)
596 store_size(size_str, slab_size(s));
598 store_size(size_str, slab_waste(s));
599 snprintf(dist_str, 40, "%lu/%lu/%d", s->slabs - s->cpu_slabs,
600 s->partial, s->cpu_slabs);
609 if (s->hwcache_align)
613 if (s->reclaim_account)
617 if (s->sanity_checks)
626 unsigned long total_alloc;
627 unsigned long total_free;
629 total_alloc = s->alloc_fastpath + s->alloc_slowpath;
630 total_free = s->free_fastpath + s->free_slowpath;
632 printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d %4ld %4ld\n",
634 total_alloc, total_free,
635 total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,
636 total_free ? (s->free_fastpath * 100 / total_free) : 0,
637 s->order_fallback, s->order, s->cmpxchg_double_fail,
638 s->cmpxchg_double_cpu_fail);
640 printf("%-21s %8ld %7d %15s %14s %4d %1d %3ld %3ld %s\n",
641 s->name, s->objects, s->object_size, size_str, dist_str,
642 s->objs_per_slab, s->order,
643 s->slabs ? (s->partial * 100) / s->slabs : 100,
644 s->slabs ? (s->objects * s->object_size * 100) /
645 (s->slabs * (page_size << s->order)) : 100,
651 * Analyze debug options. Return false if something is amiss.
653 static int debug_opt_scan(char *opt)
655 if (!opt || !opt[0] || strcmp(opt, "-") == 0)
658 if (strcasecmp(opt, "a") == 0) {
702 static int slab_empty(struct slabinfo *s)
708 * We may still have slabs even if there are no objects. Shrinking will
712 set_obj(s, "shrink", 1);
717 static void slab_debug(struct slabinfo *s)
719 if (strcmp(s->name, "*") == 0)
722 if (sanity && !s->sanity_checks) {
723 set_obj(s, "sanity", 1);
725 if (!sanity && s->sanity_checks) {
727 set_obj(s, "sanity", 0);
729 fprintf(stderr, "%s not empty cannot disable sanity checks\n", s->name);
731 if (redzone && !s->red_zone) {
733 set_obj(s, "red_zone", 1);
735 fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
737 if (!redzone && s->red_zone) {
739 set_obj(s, "red_zone", 0);
741 fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
743 if (poison && !s->poison) {
745 set_obj(s, "poison", 1);
747 fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
749 if (!poison && s->poison) {
751 set_obj(s, "poison", 0);
753 fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
755 if (tracking && !s->store_user) {
757 set_obj(s, "store_user", 1);
759 fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
761 if (!tracking && s->store_user) {
763 set_obj(s, "store_user", 0);
765 fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
767 if (tracing && !s->trace) {
769 set_obj(s, "trace", 1);
771 fprintf(stderr, "%s can only enable trace for one slab at a time\n", s->name);
773 if (!tracing && s->trace)
774 set_obj(s, "trace", 1);
777 static void totals(void)
782 char b1[20], b2[20], b3[20], b4[20];
783 unsigned long long max = 1ULL << 63;
786 unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
788 /* Number of partial slabs in a slabcache */
789 unsigned long long min_partial = max, max_partial = 0,
790 avg_partial, total_partial = 0;
792 /* Number of slabs in a slab cache */
793 unsigned long long min_slabs = max, max_slabs = 0,
794 avg_slabs, total_slabs = 0;
796 /* Size of the whole slab */
797 unsigned long long min_size = max, max_size = 0,
798 avg_size, total_size = 0;
800 /* Bytes used for object storage in a slab */
801 unsigned long long min_used = max, max_used = 0,
802 avg_used, total_used = 0;
804 /* Waste: Bytes used for alignment and padding */
805 unsigned long long min_waste = max, max_waste = 0,
806 avg_waste, total_waste = 0;
807 /* Number of objects in a slab */
808 unsigned long long min_objects = max, max_objects = 0,
809 avg_objects, total_objects = 0;
810 /* Waste per object */
811 unsigned long long min_objwaste = max,
812 max_objwaste = 0, avg_objwaste,
815 /* Memory per object */
816 unsigned long long min_memobj = max,
817 max_memobj = 0, avg_memobj,
820 /* Percentage of partial slabs per slab */
821 unsigned long min_ppart = 100, max_ppart = 0,
822 avg_ppart, total_ppart = 0;
824 /* Number of objects in partial slabs */
825 unsigned long min_partobj = max, max_partobj = 0,
826 avg_partobj, total_partobj = 0;
828 /* Percentage of partial objects of all objects in a slab */
829 unsigned long min_ppartobj = 100, max_ppartobj = 0,
830 avg_ppartobj, total_ppartobj = 0;
833 for (s = slabinfo; s < slabinfo + slabs; s++) {
834 unsigned long long size;
836 unsigned long long wasted;
837 unsigned long long objwaste;
838 unsigned long percentage_partial_slabs;
839 unsigned long percentage_partial_objs;
841 if (!s->slabs || !s->objects)
847 used = s->objects * s->object_size;
848 wasted = size - used;
849 objwaste = s->slab_size - s->object_size;
851 percentage_partial_slabs = s->partial * 100 / s->slabs;
852 if (percentage_partial_slabs > 100)
853 percentage_partial_slabs = 100;
855 percentage_partial_objs = s->objects_partial * 100
858 if (percentage_partial_objs > 100)
859 percentage_partial_objs = 100;
861 if (s->object_size < min_objsize)
862 min_objsize = s->object_size;
863 if (s->partial < min_partial)
864 min_partial = s->partial;
865 if (s->slabs < min_slabs)
866 min_slabs = s->slabs;
869 if (wasted < min_waste)
871 if (objwaste < min_objwaste)
872 min_objwaste = objwaste;
873 if (s->objects < min_objects)
874 min_objects = s->objects;
877 if (s->objects_partial < min_partobj)
878 min_partobj = s->objects_partial;
879 if (percentage_partial_slabs < min_ppart)
880 min_ppart = percentage_partial_slabs;
881 if (percentage_partial_objs < min_ppartobj)
882 min_ppartobj = percentage_partial_objs;
883 if (s->slab_size < min_memobj)
884 min_memobj = s->slab_size;
886 if (s->object_size > max_objsize)
887 max_objsize = s->object_size;
888 if (s->partial > max_partial)
889 max_partial = s->partial;
890 if (s->slabs > max_slabs)
891 max_slabs = s->slabs;
894 if (wasted > max_waste)
896 if (objwaste > max_objwaste)
897 max_objwaste = objwaste;
898 if (s->objects > max_objects)
899 max_objects = s->objects;
902 if (s->objects_partial > max_partobj)
903 max_partobj = s->objects_partial;
904 if (percentage_partial_slabs > max_ppart)
905 max_ppart = percentage_partial_slabs;
906 if (percentage_partial_objs > max_ppartobj)
907 max_ppartobj = percentage_partial_objs;
908 if (s->slab_size > max_memobj)
909 max_memobj = s->slab_size;
911 total_partial += s->partial;
912 total_slabs += s->slabs;
914 total_waste += wasted;
916 total_objects += s->objects;
918 total_partobj += s->objects_partial;
919 total_ppart += percentage_partial_slabs;
920 total_ppartobj += percentage_partial_objs;
922 total_objwaste += s->objects * objwaste;
923 total_objsize += s->objects * s->slab_size;
926 if (!total_objects) {
927 printf("No objects\n");
931 printf("No slabs\n");
935 /* Per slab averages */
936 avg_partial = total_partial / used_slabs;
937 avg_slabs = total_slabs / used_slabs;
938 avg_size = total_size / used_slabs;
939 avg_waste = total_waste / used_slabs;
941 avg_objects = total_objects / used_slabs;
942 avg_used = total_used / used_slabs;
943 avg_partobj = total_partobj / used_slabs;
944 avg_ppart = total_ppart / used_slabs;
945 avg_ppartobj = total_ppartobj / used_slabs;
947 /* Per object object sizes */
948 avg_objsize = total_used / total_objects;
949 avg_objwaste = total_objwaste / total_objects;
950 avg_partobj = total_partobj * 100 / total_objects;
951 avg_memobj = total_objsize / total_objects;
953 printf("Slabcache Totals\n");
954 printf("----------------\n");
955 printf("Slabcaches : %15d Aliases : %11d->%-3d Active: %3d\n",
956 slabs, aliases, alias_targets, used_slabs);
958 store_size(b1, total_size);store_size(b2, total_waste);
959 store_size(b3, total_waste * 100 / total_used);
960 printf("Memory used: %15s # Loss : %15s MRatio:%6s%%\n", b1, b2, b3);
962 store_size(b1, total_objects);store_size(b2, total_partobj);
963 store_size(b3, total_partobj * 100 / total_objects);
964 printf("# Objects : %15s # PartObj: %15s ORatio:%6s%%\n", b1, b2, b3);
967 printf("Per Cache Average "
969 printf("---------------------------------------"
970 "-------------------------------------\n");
972 store_size(b1, avg_objects);store_size(b2, min_objects);
973 store_size(b3, max_objects);store_size(b4, total_objects);
974 printf("#Objects %15s %15s %15s %15s\n",
977 store_size(b1, avg_slabs);store_size(b2, min_slabs);
978 store_size(b3, max_slabs);store_size(b4, total_slabs);
979 printf("#Slabs %15s %15s %15s %15s\n",
982 store_size(b1, avg_partial);store_size(b2, min_partial);
983 store_size(b3, max_partial);store_size(b4, total_partial);
984 printf("#PartSlab %15s %15s %15s %15s\n",
986 store_size(b1, avg_ppart);store_size(b2, min_ppart);
987 store_size(b3, max_ppart);
988 store_size(b4, total_partial * 100 / total_slabs);
989 printf("%%PartSlab%15s%% %15s%% %15s%% %15s%%\n",
992 store_size(b1, avg_partobj);store_size(b2, min_partobj);
993 store_size(b3, max_partobj);
994 store_size(b4, total_partobj);
995 printf("PartObjs %15s %15s %15s %15s\n",
998 store_size(b1, avg_ppartobj);store_size(b2, min_ppartobj);
999 store_size(b3, max_ppartobj);
1000 store_size(b4, total_partobj * 100 / total_objects);
1001 printf("%% PartObj%15s%% %15s%% %15s%% %15s%%\n",
1004 store_size(b1, avg_size);store_size(b2, min_size);
1005 store_size(b3, max_size);store_size(b4, total_size);
1006 printf("Memory %15s %15s %15s %15s\n",
1009 store_size(b1, avg_used);store_size(b2, min_used);
1010 store_size(b3, max_used);store_size(b4, total_used);
1011 printf("Used %15s %15s %15s %15s\n",
1014 store_size(b1, avg_waste);store_size(b2, min_waste);
1015 store_size(b3, max_waste);store_size(b4, total_waste);
1016 printf("Loss %15s %15s %15s %15s\n",
1020 printf("Per Object Average "
1022 printf("---------------------------------------"
1023 "--------------------\n");
1025 store_size(b1, avg_memobj);store_size(b2, min_memobj);
1026 store_size(b3, max_memobj);
1027 printf("Memory %15s %15s %15s\n",
1029 store_size(b1, avg_objsize);store_size(b2, min_objsize);
1030 store_size(b3, max_objsize);
1031 printf("User %15s %15s %15s\n",
1034 store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
1035 store_size(b3, max_objwaste);
1036 printf("Loss %15s %15s %15s\n",
1040 static void sort_slabs(void)
1042 struct slabinfo *s1,*s2;
1044 for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
1045 for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
1049 result = slab_size(s1) < slab_size(s2);
1050 else if (sort_active)
1051 result = slab_activity(s1) < slab_activity(s2);
1053 result = slab_waste(s1) < slab_waste(s2);
1054 else if (sort_partial)
1055 result = s1->partial < s2->partial;
1057 result = strcasecmp(s1->name, s2->name);
1065 memcpy(&t, s1, sizeof(struct slabinfo));
1066 memcpy(s1, s2, sizeof(struct slabinfo));
1067 memcpy(s2, &t, sizeof(struct slabinfo));
1073 static void sort_aliases(void)
1075 struct aliasinfo *a1,*a2;
1077 for (a1 = aliasinfo; a1 < aliasinfo + aliases; a1++) {
1078 for (a2 = a1 + 1; a2 < aliasinfo + aliases; a2++) {
1083 if (show_alias && !show_inverted) {
1087 if (strcasecmp(n1, n2) > 0) {
1090 memcpy(&t, a1, sizeof(struct aliasinfo));
1091 memcpy(a1, a2, sizeof(struct aliasinfo));
1092 memcpy(a2, &t, sizeof(struct aliasinfo));
1098 static void link_slabs(void)
1100 struct aliasinfo *a;
1103 for (a = aliasinfo; a < aliasinfo + aliases; a++) {
1105 for (s = slabinfo; s < slabinfo + slabs; s++)
1106 if (strcmp(a->ref, s->name) == 0) {
1111 if (s == slabinfo + slabs)
1112 fatal("Unresolved alias %s\n", a->ref);
1116 static void alias(void)
1118 struct aliasinfo *a;
1119 char *active = NULL;
1124 for(a = aliasinfo; a < aliasinfo + aliases; a++) {
1126 if (!show_single_ref && a->slab->refs == 1)
1129 if (!show_inverted) {
1131 if (strcmp(a->slab->name, active) == 0) {
1132 printf(" %s", a->name);
1136 printf("\n%-12s <- %s", a->slab->name, a->name);
1137 active = a->slab->name;
1140 printf("%-15s -> %s\n", a->name, a->slab->name);
1147 static void rename_slabs(void)
1150 struct aliasinfo *a;
1152 for (s = slabinfo; s < slabinfo + slabs; s++) {
1153 if (*s->name != ':')
1156 if (s->refs > 1 && !show_first_alias)
1159 a = find_one_alias(s);
1170 static int slab_mismatch(char *slab)
1172 return regexec(&pattern, slab, 0, NULL, 0);
1175 static void read_slab_dir(void)
1179 struct slabinfo *slab = slabinfo;
1180 struct aliasinfo *alias = aliasinfo;
1185 if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
1186 fatal("SYSFS support for SLUB not active\n");
1189 while ((de = readdir(dir))) {
1190 if (de->d_name[0] == '.' ||
1191 (de->d_name[0] != ':' && slab_mismatch(de->d_name)))
1193 switch (de->d_type) {
1195 alias->name = strdup(de->d_name);
1196 count = readlink(de->d_name, buffer, sizeof(buffer)-1);
1199 fatal("Cannot read symlink %s\n", de->d_name);
1203 while (p > buffer && p[-1] != '/')
1205 alias->ref = strdup(p);
1209 if (chdir(de->d_name))
1210 fatal("Unable to access slab %s\n", slab->name);
1211 slab->name = strdup(de->d_name);
1214 slab->aliases = get_obj("aliases");
1215 slab->align = get_obj("align");
1216 slab->cache_dma = get_obj("cache_dma");
1217 slab->cpu_slabs = get_obj("cpu_slabs");
1218 slab->destroy_by_rcu = get_obj("destroy_by_rcu");
1219 slab->hwcache_align = get_obj("hwcache_align");
1220 slab->object_size = get_obj("object_size");
1221 slab->objects = get_obj("objects");
1222 slab->objects_partial = get_obj("objects_partial");
1223 slab->objects_total = get_obj("objects_total");
1224 slab->objs_per_slab = get_obj("objs_per_slab");
1225 slab->order = get_obj("order");
1226 slab->partial = get_obj("partial");
1227 slab->partial = get_obj_and_str("partial", &t);
1228 decode_numa_list(slab->numa_partial, t);
1230 slab->poison = get_obj("poison");
1231 slab->reclaim_account = get_obj("reclaim_account");
1232 slab->red_zone = get_obj("red_zone");
1233 slab->sanity_checks = get_obj("sanity_checks");
1234 slab->slab_size = get_obj("slab_size");
1235 slab->slabs = get_obj_and_str("slabs", &t);
1236 decode_numa_list(slab->numa, t);
1238 slab->store_user = get_obj("store_user");
1239 slab->trace = get_obj("trace");
1240 slab->alloc_fastpath = get_obj("alloc_fastpath");
1241 slab->alloc_slowpath = get_obj("alloc_slowpath");
1242 slab->free_fastpath = get_obj("free_fastpath");
1243 slab->free_slowpath = get_obj("free_slowpath");
1244 slab->free_frozen= get_obj("free_frozen");
1245 slab->free_add_partial = get_obj("free_add_partial");
1246 slab->free_remove_partial = get_obj("free_remove_partial");
1247 slab->alloc_from_partial = get_obj("alloc_from_partial");
1248 slab->alloc_slab = get_obj("alloc_slab");
1249 slab->alloc_refill = get_obj("alloc_refill");
1250 slab->free_slab = get_obj("free_slab");
1251 slab->cpuslab_flush = get_obj("cpuslab_flush");
1252 slab->deactivate_full = get_obj("deactivate_full");
1253 slab->deactivate_empty = get_obj("deactivate_empty");
1254 slab->deactivate_to_head = get_obj("deactivate_to_head");
1255 slab->deactivate_to_tail = get_obj("deactivate_to_tail");
1256 slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
1257 slab->order_fallback = get_obj("order_fallback");
1258 slab->cmpxchg_double_cpu_fail = get_obj("cmpxchg_double_cpu_fail");
1259 slab->cmpxchg_double_fail = get_obj("cmpxchg_double_fail");
1260 slab->cpu_partial_alloc = get_obj("cpu_partial_alloc");
1261 slab->cpu_partial_free = get_obj("cpu_partial_free");
1262 slab->alloc_node_mismatch = get_obj("alloc_node_mismatch");
1263 slab->deactivate_bypass = get_obj("deactivate_bypass");
1265 if (slab->name[0] == ':')
1270 fatal("Unknown file type %lx\n", de->d_type);
1274 slabs = slab - slabinfo;
1275 actual_slabs = slabs;
1276 aliases = alias - aliasinfo;
1277 if (slabs > MAX_SLABS)
1278 fatal("Too many slabs\n");
1279 if (aliases > MAX_ALIASES)
1280 fatal("Too many aliases\n");
1283 static void output_slabs(void)
1285 struct slabinfo *slab;
1286 int lines = output_lines;
1288 for (slab = slabinfo; (slab < slabinfo + slabs) &&
1289 lines != 0; slab++) {
1299 else if (show_track)
1300 show_tracking(slab);
1302 slab_validate(slab);
1311 else if (show_report)
1316 static void _xtotals(char *heading, char *underline,
1317 int loss, int size, int partial)
1319 printf("%s%s", heading, underline);
1323 sort_partial = partial;
1328 static void xtotals(void)
1330 char *heading, *underline;
1337 heading = "\nSlabs sorted by size\n";
1338 underline = "--------------------\n";
1339 _xtotals(heading, underline, 0, 1, 0);
1341 heading = "\nSlabs sorted by loss\n";
1342 underline = "--------------------\n";
1343 _xtotals(heading, underline, 1, 0, 0);
1345 heading = "\nSlabs sorted by number of partial slabs\n";
1346 underline = "---------------------------------------\n";
1347 _xtotals(heading, underline, 0, 0, 1);
1352 struct option opts[] = {
1353 { "aliases", no_argument, NULL, 'a' },
1354 { "activity", no_argument, NULL, 'A' },
1355 { "Bytes", no_argument, NULL, 'B'},
1356 { "debug", optional_argument, NULL, 'd' },
1357 { "display-activity", no_argument, NULL, 'D' },
1358 { "empty", no_argument, NULL, 'e' },
1359 { "first-alias", no_argument, NULL, 'f' },
1360 { "help", no_argument, NULL, 'h' },
1361 { "inverted", no_argument, NULL, 'i'},
1362 { "slabs", no_argument, NULL, 'l' },
1363 { "Loss", no_argument, NULL, 'L'},
1364 { "numa", no_argument, NULL, 'n' },
1365 { "lines", required_argument, NULL, 'N'},
1366 { "ops", no_argument, NULL, 'o' },
1367 { "partial", no_argument, NULL, 'p'},
1368 { "report", no_argument, NULL, 'r' },
1369 { "shrink", no_argument, NULL, 's' },
1370 { "Size", no_argument, NULL, 'S'},
1371 { "tracking", no_argument, NULL, 't'},
1372 { "Totals", no_argument, NULL, 'T'},
1373 { "Unreclaim", no_argument, NULL, 'U'},
1374 { "validate", no_argument, NULL, 'v' },
1375 { "Xtotals", no_argument, NULL, 'X'},
1376 { "zero", no_argument, NULL, 'z' },
1377 { "1ref", no_argument, NULL, '1'},
1378 { NULL, 0, NULL, 0 }
1381 int main(int argc, char *argv[])
1385 char *pattern_source;
1387 page_size = getpagesize();
1389 while ((c = getopt_long(argc, argv, "aABd::DefhilLnN:oPrsStTUvXz1",
1403 if (!debug_opt_scan(optarg))
1404 fatal("Invalid debug option '%s'\n", optarg);
1413 show_first_alias = 1;
1432 output_lines = atoi(optarg);
1433 if (output_lines < 1)
1465 if (output_lines == -1)
1467 extended_totals = 1;
1474 show_single_ref = 1;
1477 fatal("%s: Invalid option '%c'\n", argv[0], optopt);
1481 if (!show_slab && !show_alias && !show_track && !show_report
1482 && !validate && !shrink && !set_debug && !show_ops)
1486 pattern_source = argv[optind];
1488 pattern_source = ".*";
1490 err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
1492 fatal("%s: Invalid pattern '%s' code %d\n",
1493 argv[0], pattern_source, err);
1497 } else if (extended_totals) {
1499 } else if (show_totals) {