]>
git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - tools/vm/slabinfo.c
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 int hwcache_align
, object_size
, objs_per_slab
;
34 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
) {