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
];
59 int alias_targets
= 0;
71 int show_first_alias
= 0;
74 int show_inverted
= 0;
75 int show_single_ref
= 0;
81 int show_activity
= 0;
94 static void fatal(const char *x
, ...)
99 vfprintf(stderr
, x
, ap
);
104 static void usage(void)
106 printf("slabinfo 4/15/2011. (c) 2007 sgi/(c) 2011 Linux Foundation.\n\n"
107 "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
108 "-a|--aliases Show aliases\n"
109 "-A|--activity Most active slabs first\n"
110 "-d<options>|--debug=<options> Set/Clear Debug options\n"
111 "-D|--display-active Switch line format to activity\n"
112 "-e|--empty Show empty slabs\n"
113 "-f|--first-alias Show first alias\n"
114 "-h|--help Show usage information\n"
115 "-i|--inverted Inverted list\n"
116 "-l|--slabs Show slabs\n"
117 "-n|--numa Show NUMA information\n"
118 "-o|--ops Show kmem_cache_ops\n"
119 "-s|--shrink Shrink slabs\n"
120 "-r|--report Detailed report on single slabs\n"
121 "-S|--Size Sort by size\n"
122 "-t|--tracking Show alloc/free information\n"
123 "-T|--Totals Show summary information\n"
124 "-v|--validate Validate slabs\n"
125 "-z|--zero Include empty slabs\n"
126 "-1|--1ref Single reference\n"
127 "\nValid debug options (FZPUT may be combined)\n"
128 "a / A Switch on all debug options (=FZUP)\n"
129 "- Switch off all debug options\n"
130 "f / F Sanity Checks (SLAB_DEBUG_FREE)\n"
138 static unsigned long read_obj(const char *name
)
140 FILE *f
= fopen(name
, "r");
145 if (!fgets(buffer
, sizeof(buffer
), f
))
148 if (buffer
[strlen(buffer
)] == '\n')
149 buffer
[strlen(buffer
)] = 0;
151 return strlen(buffer
);
156 * Get the contents of an attribute
158 static unsigned long get_obj(const char *name
)
166 static unsigned long get_obj_and_str(const char *name
, char **x
)
168 unsigned long result
= 0;
173 if (!read_obj(name
)) {
177 result
= strtoul(buffer
, &p
, 10);
185 static void set_obj(struct slabinfo
*s
, const char *name
, int n
)
190 snprintf(x
, 100, "%s/%s", s
->name
, name
);
193 fatal("Cannot write to %s\n", x
);
195 fprintf(f
, "%d\n", n
);
199 static unsigned long read_slab_obj(struct slabinfo
*s
, const char *name
)
205 snprintf(x
, 100, "%s/%s", s
->name
, name
);
211 l
= fread(buffer
, 1, sizeof(buffer
), f
);
220 * Put a size string together
222 static int store_size(char *buffer
, unsigned long value
)
224 unsigned long divisor
= 1;
228 if (value
> 1000000000UL) {
229 divisor
= 100000000UL;
231 } else if (value
> 1000000UL) {
234 } else if (value
> 1000UL) {
240 n
= sprintf(buffer
, "%ld",value
);
247 memmove(buffer
+ n
- 2, buffer
+ n
- 3, 4);
254 static void decode_numa_list(int *numa
, char *t
)
259 memset(numa
, 0, MAX_NODES
* sizeof(int));
266 node
= strtoul(t
, &t
, 10);
269 nr
= strtoul(t
, &t
, 10);
271 if (node
> highest_node
)
279 static void slab_validate(struct slabinfo
*s
)
281 if (strcmp(s
->name
, "*") == 0)
284 set_obj(s
, "validate", 1);
287 static void slab_shrink(struct slabinfo
*s
)
289 if (strcmp(s
->name
, "*") == 0)
292 set_obj(s
, "shrink", 1);
297 static void first_line(void)
300 printf("Name Objects Alloc Free %%Fast Fallb O CmpX UL\n");
302 printf("Name Objects Objsize Space "
303 "Slabs/Part/Cpu O/S O %%Fr %%Ef Flg\n");
307 * Find the shortest alias of a slab
309 static struct aliasinfo
*find_one_alias(struct slabinfo
*find
)
312 struct aliasinfo
*best
= NULL
;
314 for(a
= aliasinfo
;a
< aliasinfo
+ aliases
; a
++) {
315 if (a
->slab
== find
&&
316 (!best
|| strlen(best
->name
) < strlen(a
->name
))) {
318 if (strncmp(a
->name
,"kmall", 5) == 0)
325 static unsigned long slab_size(struct slabinfo
*s
)
327 return s
->slabs
* (page_size
<< s
->order
);
330 static unsigned long slab_activity(struct slabinfo
*s
)
332 return s
->alloc_fastpath
+ s
->free_fastpath
+
333 s
->alloc_slowpath
+ s
->free_slowpath
;
336 static void slab_numa(struct slabinfo
*s
, int mode
)
340 if (strcmp(s
->name
, "*") == 0)
344 printf("\n%s: No NUMA information available.\n", s
->name
);
348 if (skip_zero
&& !s
->slabs
)
352 printf("\n%-21s:", mode
? "NUMA nodes" : "Slab");
353 for(node
= 0; node
<= highest_node
; node
++)
354 printf(" %4d", node
);
355 printf("\n----------------------");
356 for(node
= 0; node
<= highest_node
; node
++)
360 printf("%-21s ", mode
? "All slabs" : s
->name
);
361 for(node
= 0; node
<= highest_node
; node
++) {
364 store_size(b
, s
->numa
[node
]);
369 printf("%-21s ", "Partial slabs");
370 for(node
= 0; node
<= highest_node
; node
++) {
373 store_size(b
, s
->numa_partial
[node
]);
381 static void show_tracking(struct slabinfo
*s
)
383 printf("\n%s: Kernel object allocation\n", s
->name
);
384 printf("-----------------------------------------------------------------------\n");
385 if (read_slab_obj(s
, "alloc_calls"))
386 printf("%s", buffer
);
390 printf("\n%s: Kernel object freeing\n", s
->name
);
391 printf("------------------------------------------------------------------------\n");
392 if (read_slab_obj(s
, "free_calls"))
393 printf("%s", buffer
);
399 static void ops(struct slabinfo
*s
)
401 if (strcmp(s
->name
, "*") == 0)
404 if (read_slab_obj(s
, "ops")) {
405 printf("\n%s: kmem_cache operations\n", s
->name
);
406 printf("--------------------------------------------\n");
407 printf("%s", buffer
);
409 printf("\n%s has no kmem_cache operations\n", s
->name
);
412 static const char *onoff(int x
)
419 static void slab_stats(struct slabinfo
*s
)
421 unsigned long total_alloc
;
422 unsigned long total_free
;
428 total_alloc
= s
->alloc_fastpath
+ s
->alloc_slowpath
;
429 total_free
= s
->free_fastpath
+ s
->free_slowpath
;
435 printf("Slab Perf Counter Alloc Free %%Al %%Fr\n");
436 printf("--------------------------------------------------\n");
437 printf("Fastpath %8lu %8lu %3lu %3lu\n",
438 s
->alloc_fastpath
, s
->free_fastpath
,
439 s
->alloc_fastpath
* 100 / total_alloc
,
440 s
->free_fastpath
* 100 / total_free
);
441 printf("Slowpath %8lu %8lu %3lu %3lu\n",
442 total_alloc
- s
->alloc_fastpath
, s
->free_slowpath
,
443 (total_alloc
- s
->alloc_fastpath
) * 100 / total_alloc
,
444 s
->free_slowpath
* 100 / total_free
);
445 printf("Page Alloc %8lu %8lu %3lu %3lu\n",
446 s
->alloc_slab
, s
->free_slab
,
447 s
->alloc_slab
* 100 / total_alloc
,
448 s
->free_slab
* 100 / total_free
);
449 printf("Add partial %8lu %8lu %3lu %3lu\n",
450 s
->deactivate_to_head
+ s
->deactivate_to_tail
,
452 (s
->deactivate_to_head
+ s
->deactivate_to_tail
) * 100 / total_alloc
,
453 s
->free_add_partial
* 100 / total_free
);
454 printf("Remove partial %8lu %8lu %3lu %3lu\n",
455 s
->alloc_from_partial
, s
->free_remove_partial
,
456 s
->alloc_from_partial
* 100 / total_alloc
,
457 s
->free_remove_partial
* 100 / total_free
);
459 printf("Cpu partial list %8lu %8lu %3lu %3lu\n",
460 s
->cpu_partial_alloc
, s
->cpu_partial_free
,
461 s
->cpu_partial_alloc
* 100 / total_alloc
,
462 s
->cpu_partial_free
* 100 / total_free
);
464 printf("RemoteObj/SlabFrozen %8lu %8lu %3lu %3lu\n",
465 s
->deactivate_remote_frees
, s
->free_frozen
,
466 s
->deactivate_remote_frees
* 100 / total_alloc
,
467 s
->free_frozen
* 100 / total_free
);
469 printf("Total %8lu %8lu\n\n", total_alloc
, total_free
);
471 if (s
->cpuslab_flush
)
472 printf("Flushes %8lu\n", s
->cpuslab_flush
);
474 total
= s
->deactivate_full
+ s
->deactivate_empty
+
475 s
->deactivate_to_head
+ s
->deactivate_to_tail
+ s
->deactivate_bypass
;
478 printf("\nSlab Deactivation Ocurrences %%\n");
479 printf("-------------------------------------------------\n");
480 printf("Slab full %7lu %3lu%%\n",
481 s
->deactivate_full
, (s
->deactivate_full
* 100) / total
);
482 printf("Slab empty %7lu %3lu%%\n",
483 s
->deactivate_empty
, (s
->deactivate_empty
* 100) / total
);
484 printf("Moved to head of partial list %7lu %3lu%%\n",
485 s
->deactivate_to_head
, (s
->deactivate_to_head
* 100) / total
);
486 printf("Moved to tail of partial list %7lu %3lu%%\n",
487 s
->deactivate_to_tail
, (s
->deactivate_to_tail
* 100) / total
);
488 printf("Deactivation bypass %7lu %3lu%%\n",
489 s
->deactivate_bypass
, (s
->deactivate_bypass
* 100) / total
);
490 printf("Refilled from foreign frees %7lu %3lu%%\n",
491 s
->alloc_refill
, (s
->alloc_refill
* 100) / total
);
492 printf("Node mismatch %7lu %3lu%%\n",
493 s
->alloc_node_mismatch
, (s
->alloc_node_mismatch
* 100) / total
);
496 if (s
->cmpxchg_double_fail
|| s
->cmpxchg_double_cpu_fail
)
497 printf("\nCmpxchg_double Looping\n------------------------\n");
498 printf("Locked Cmpxchg Double redos %lu\nUnlocked Cmpxchg Double redos %lu\n",
499 s
->cmpxchg_double_fail
, s
->cmpxchg_double_cpu_fail
);
502 static void report(struct slabinfo
*s
)
504 if (strcmp(s
->name
, "*") == 0)
507 printf("\nSlabcache: %-20s Aliases: %2d Order : %2d Objects: %lu\n",
508 s
->name
, s
->aliases
, s
->order
, s
->objects
);
509 if (s
->hwcache_align
)
510 printf("** Hardware cacheline aligned\n");
512 printf("** Memory is allocated in a special DMA zone\n");
513 if (s
->destroy_by_rcu
)
514 printf("** Slabs are destroyed via RCU\n");
515 if (s
->reclaim_account
)
516 printf("** Reclaim accounting active\n");
518 printf("\nSizes (bytes) Slabs Debug Memory\n");
519 printf("------------------------------------------------------------------------\n");
520 printf("Object : %7d Total : %7ld Sanity Checks : %s Total: %7ld\n",
521 s
->object_size
, s
->slabs
, onoff(s
->sanity_checks
),
522 s
->slabs
* (page_size
<< s
->order
));
523 printf("SlabObj: %7d Full : %7ld Redzoning : %s Used : %7ld\n",
524 s
->slab_size
, s
->slabs
- s
->partial
- s
->cpu_slabs
,
525 onoff(s
->red_zone
), s
->objects
* s
->object_size
);
526 printf("SlabSiz: %7d Partial: %7ld Poisoning : %s Loss : %7ld\n",
527 page_size
<< s
->order
, s
->partial
, onoff(s
->poison
),
528 s
->slabs
* (page_size
<< s
->order
) - s
->objects
* s
->object_size
);
529 printf("Loss : %7d CpuSlab: %7d Tracking : %s Lalig: %7ld\n",
530 s
->slab_size
- s
->object_size
, s
->cpu_slabs
, onoff(s
->store_user
),
531 (s
->slab_size
- s
->object_size
) * s
->objects
);
532 printf("Align : %7d Objects: %7d Tracing : %s Lpadd: %7ld\n",
533 s
->align
, s
->objs_per_slab
, onoff(s
->trace
),
534 ((page_size
<< s
->order
) - s
->objs_per_slab
* s
->slab_size
) *
543 static void slabcache(struct slabinfo
*s
)
550 if (strcmp(s
->name
, "*") == 0)
553 if (actual_slabs
== 1) {
558 if (skip_zero
&& !show_empty
&& !s
->slabs
)
561 if (show_empty
&& s
->slabs
)
564 store_size(size_str
, slab_size(s
));
565 snprintf(dist_str
, 40, "%lu/%lu/%d", s
->slabs
- s
->cpu_slabs
,
566 s
->partial
, s
->cpu_slabs
);
575 if (s
->hwcache_align
)
579 if (s
->reclaim_account
)
583 if (s
->sanity_checks
)
592 unsigned long total_alloc
;
593 unsigned long total_free
;
595 total_alloc
= s
->alloc_fastpath
+ s
->alloc_slowpath
;
596 total_free
= s
->free_fastpath
+ s
->free_slowpath
;
598 printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d %4ld %4ld\n",
600 total_alloc
, total_free
,
601 total_alloc
? (s
->alloc_fastpath
* 100 / total_alloc
) : 0,
602 total_free
? (s
->free_fastpath
* 100 / total_free
) : 0,
603 s
->order_fallback
, s
->order
, s
->cmpxchg_double_fail
,
604 s
->cmpxchg_double_cpu_fail
);
607 printf("%-21s %8ld %7d %8s %14s %4d %1d %3ld %3ld %s\n",
608 s
->name
, s
->objects
, s
->object_size
, size_str
, dist_str
,
609 s
->objs_per_slab
, s
->order
,
610 s
->slabs
? (s
->partial
* 100) / s
->slabs
: 100,
611 s
->slabs
? (s
->objects
* s
->object_size
* 100) /
612 (s
->slabs
* (page_size
<< s
->order
)) : 100,
617 * Analyze debug options. Return false if something is amiss.
619 static int debug_opt_scan(char *opt
)
621 if (!opt
|| !opt
[0] || strcmp(opt
, "-") == 0)
624 if (strcasecmp(opt
, "a") == 0) {
668 static int slab_empty(struct slabinfo
*s
)
674 * We may still have slabs even if there are no objects. Shrinking will
678 set_obj(s
, "shrink", 1);
683 static void slab_debug(struct slabinfo
*s
)
685 if (strcmp(s
->name
, "*") == 0)
688 if (sanity
&& !s
->sanity_checks
) {
689 set_obj(s
, "sanity", 1);
691 if (!sanity
&& s
->sanity_checks
) {
693 set_obj(s
, "sanity", 0);
695 fprintf(stderr
, "%s not empty cannot disable sanity checks\n", s
->name
);
697 if (redzone
&& !s
->red_zone
) {
699 set_obj(s
, "red_zone", 1);
701 fprintf(stderr
, "%s not empty cannot enable redzoning\n", s
->name
);
703 if (!redzone
&& s
->red_zone
) {
705 set_obj(s
, "red_zone", 0);
707 fprintf(stderr
, "%s not empty cannot disable redzoning\n", s
->name
);
709 if (poison
&& !s
->poison
) {
711 set_obj(s
, "poison", 1);
713 fprintf(stderr
, "%s not empty cannot enable poisoning\n", s
->name
);
715 if (!poison
&& s
->poison
) {
717 set_obj(s
, "poison", 0);
719 fprintf(stderr
, "%s not empty cannot disable poisoning\n", s
->name
);
721 if (tracking
&& !s
->store_user
) {
723 set_obj(s
, "store_user", 1);
725 fprintf(stderr
, "%s not empty cannot enable tracking\n", s
->name
);
727 if (!tracking
&& s
->store_user
) {
729 set_obj(s
, "store_user", 0);
731 fprintf(stderr
, "%s not empty cannot disable tracking\n", s
->name
);
733 if (tracing
&& !s
->trace
) {
735 set_obj(s
, "trace", 1);
737 fprintf(stderr
, "%s can only enable trace for one slab at a time\n", s
->name
);
739 if (!tracing
&& s
->trace
)
740 set_obj(s
, "trace", 1);
743 static void totals(void)
748 char b1
[20], b2
[20], b3
[20], b4
[20];
749 unsigned long long max
= 1ULL << 63;
752 unsigned long long min_objsize
= max
, max_objsize
= 0, avg_objsize
;
754 /* Number of partial slabs in a slabcache */
755 unsigned long long min_partial
= max
, max_partial
= 0,
756 avg_partial
, total_partial
= 0;
758 /* Number of slabs in a slab cache */
759 unsigned long long min_slabs
= max
, max_slabs
= 0,
760 avg_slabs
, total_slabs
= 0;
762 /* Size of the whole slab */
763 unsigned long long min_size
= max
, max_size
= 0,
764 avg_size
, total_size
= 0;
766 /* Bytes used for object storage in a slab */
767 unsigned long long min_used
= max
, max_used
= 0,
768 avg_used
, total_used
= 0;
770 /* Waste: Bytes used for alignment and padding */
771 unsigned long long min_waste
= max
, max_waste
= 0,
772 avg_waste
, total_waste
= 0;
773 /* Number of objects in a slab */
774 unsigned long long min_objects
= max
, max_objects
= 0,
775 avg_objects
, total_objects
= 0;
776 /* Waste per object */
777 unsigned long long min_objwaste
= max
,
778 max_objwaste
= 0, avg_objwaste
,
781 /* Memory per object */
782 unsigned long long min_memobj
= max
,
783 max_memobj
= 0, avg_memobj
,
786 /* Percentage of partial slabs per slab */
787 unsigned long min_ppart
= 100, max_ppart
= 0,
788 avg_ppart
, total_ppart
= 0;
790 /* Number of objects in partial slabs */
791 unsigned long min_partobj
= max
, max_partobj
= 0,
792 avg_partobj
, total_partobj
= 0;
794 /* Percentage of partial objects of all objects in a slab */
795 unsigned long min_ppartobj
= 100, max_ppartobj
= 0,
796 avg_ppartobj
, total_ppartobj
= 0;
799 for (s
= slabinfo
; s
< slabinfo
+ slabs
; s
++) {
800 unsigned long long size
;
802 unsigned long long wasted
;
803 unsigned long long objwaste
;
804 unsigned long percentage_partial_slabs
;
805 unsigned long percentage_partial_objs
;
807 if (!s
->slabs
|| !s
->objects
)
813 used
= s
->objects
* s
->object_size
;
814 wasted
= size
- used
;
815 objwaste
= s
->slab_size
- s
->object_size
;
817 percentage_partial_slabs
= s
->partial
* 100 / s
->slabs
;
818 if (percentage_partial_slabs
> 100)
819 percentage_partial_slabs
= 100;
821 percentage_partial_objs
= s
->objects_partial
* 100
824 if (percentage_partial_objs
> 100)
825 percentage_partial_objs
= 100;
827 if (s
->object_size
< min_objsize
)
828 min_objsize
= s
->object_size
;
829 if (s
->partial
< min_partial
)
830 min_partial
= s
->partial
;
831 if (s
->slabs
< min_slabs
)
832 min_slabs
= s
->slabs
;
835 if (wasted
< min_waste
)
837 if (objwaste
< min_objwaste
)
838 min_objwaste
= objwaste
;
839 if (s
->objects
< min_objects
)
840 min_objects
= s
->objects
;
843 if (s
->objects_partial
< min_partobj
)
844 min_partobj
= s
->objects_partial
;
845 if (percentage_partial_slabs
< min_ppart
)
846 min_ppart
= percentage_partial_slabs
;
847 if (percentage_partial_objs
< min_ppartobj
)
848 min_ppartobj
= percentage_partial_objs
;
849 if (s
->slab_size
< min_memobj
)
850 min_memobj
= s
->slab_size
;
852 if (s
->object_size
> max_objsize
)
853 max_objsize
= s
->object_size
;
854 if (s
->partial
> max_partial
)
855 max_partial
= s
->partial
;
856 if (s
->slabs
> max_slabs
)
857 max_slabs
= s
->slabs
;
860 if (wasted
> max_waste
)
862 if (objwaste
> max_objwaste
)
863 max_objwaste
= objwaste
;
864 if (s
->objects
> max_objects
)
865 max_objects
= s
->objects
;
868 if (s
->objects_partial
> max_partobj
)
869 max_partobj
= s
->objects_partial
;
870 if (percentage_partial_slabs
> max_ppart
)
871 max_ppart
= percentage_partial_slabs
;
872 if (percentage_partial_objs
> max_ppartobj
)
873 max_ppartobj
= percentage_partial_objs
;
874 if (s
->slab_size
> max_memobj
)
875 max_memobj
= s
->slab_size
;
877 total_partial
+= s
->partial
;
878 total_slabs
+= s
->slabs
;
880 total_waste
+= wasted
;
882 total_objects
+= s
->objects
;
884 total_partobj
+= s
->objects_partial
;
885 total_ppart
+= percentage_partial_slabs
;
886 total_ppartobj
+= percentage_partial_objs
;
888 total_objwaste
+= s
->objects
* objwaste
;
889 total_objsize
+= s
->objects
* s
->slab_size
;
892 if (!total_objects
) {
893 printf("No objects\n");
897 printf("No slabs\n");
901 /* Per slab averages */
902 avg_partial
= total_partial
/ used_slabs
;
903 avg_slabs
= total_slabs
/ used_slabs
;
904 avg_size
= total_size
/ used_slabs
;
905 avg_waste
= total_waste
/ used_slabs
;
907 avg_objects
= total_objects
/ used_slabs
;
908 avg_used
= total_used
/ used_slabs
;
909 avg_partobj
= total_partobj
/ used_slabs
;
910 avg_ppart
= total_ppart
/ used_slabs
;
911 avg_ppartobj
= total_ppartobj
/ used_slabs
;
913 /* Per object object sizes */
914 avg_objsize
= total_used
/ total_objects
;
915 avg_objwaste
= total_objwaste
/ total_objects
;
916 avg_partobj
= total_partobj
* 100 / total_objects
;
917 avg_memobj
= total_objsize
/ total_objects
;
919 printf("Slabcache Totals\n");
920 printf("----------------\n");
921 printf("Slabcaches : %3d Aliases : %3d->%-3d Active: %3d\n",
922 slabs
, aliases
, alias_targets
, used_slabs
);
924 store_size(b1
, total_size
);store_size(b2
, total_waste
);
925 store_size(b3
, total_waste
* 100 / total_used
);
926 printf("Memory used: %6s # Loss : %6s MRatio:%6s%%\n", b1
, b2
, b3
);
928 store_size(b1
, total_objects
);store_size(b2
, total_partobj
);
929 store_size(b3
, total_partobj
* 100 / total_objects
);
930 printf("# Objects : %6s # PartObj: %6s ORatio:%6s%%\n", b1
, b2
, b3
);
933 printf("Per Cache Average Min Max Total\n");
934 printf("---------------------------------------------------------\n");
936 store_size(b1
, avg_objects
);store_size(b2
, min_objects
);
937 store_size(b3
, max_objects
);store_size(b4
, total_objects
);
938 printf("#Objects %10s %10s %10s %10s\n",
941 store_size(b1
, avg_slabs
);store_size(b2
, min_slabs
);
942 store_size(b3
, max_slabs
);store_size(b4
, total_slabs
);
943 printf("#Slabs %10s %10s %10s %10s\n",
946 store_size(b1
, avg_partial
);store_size(b2
, min_partial
);
947 store_size(b3
, max_partial
);store_size(b4
, total_partial
);
948 printf("#PartSlab %10s %10s %10s %10s\n",
950 store_size(b1
, avg_ppart
);store_size(b2
, min_ppart
);
951 store_size(b3
, max_ppart
);
952 store_size(b4
, total_partial
* 100 / total_slabs
);
953 printf("%%PartSlab%10s%% %10s%% %10s%% %10s%%\n",
956 store_size(b1
, avg_partobj
);store_size(b2
, min_partobj
);
957 store_size(b3
, max_partobj
);
958 store_size(b4
, total_partobj
);
959 printf("PartObjs %10s %10s %10s %10s\n",
962 store_size(b1
, avg_ppartobj
);store_size(b2
, min_ppartobj
);
963 store_size(b3
, max_ppartobj
);
964 store_size(b4
, total_partobj
* 100 / total_objects
);
965 printf("%% PartObj%10s%% %10s%% %10s%% %10s%%\n",
968 store_size(b1
, avg_size
);store_size(b2
, min_size
);
969 store_size(b3
, max_size
);store_size(b4
, total_size
);
970 printf("Memory %10s %10s %10s %10s\n",
973 store_size(b1
, avg_used
);store_size(b2
, min_used
);
974 store_size(b3
, max_used
);store_size(b4
, total_used
);
975 printf("Used %10s %10s %10s %10s\n",
978 store_size(b1
, avg_waste
);store_size(b2
, min_waste
);
979 store_size(b3
, max_waste
);store_size(b4
, total_waste
);
980 printf("Loss %10s %10s %10s %10s\n",
984 printf("Per Object Average Min Max\n");
985 printf("---------------------------------------------\n");
987 store_size(b1
, avg_memobj
);store_size(b2
, min_memobj
);
988 store_size(b3
, max_memobj
);
989 printf("Memory %10s %10s %10s\n",
991 store_size(b1
, avg_objsize
);store_size(b2
, min_objsize
);
992 store_size(b3
, max_objsize
);
993 printf("User %10s %10s %10s\n",
996 store_size(b1
, avg_objwaste
);store_size(b2
, min_objwaste
);
997 store_size(b3
, max_objwaste
);
998 printf("Loss %10s %10s %10s\n",
1002 static void sort_slabs(void)
1004 struct slabinfo
*s1
,*s2
;
1006 for (s1
= slabinfo
; s1
< slabinfo
+ slabs
; s1
++) {
1007 for (s2
= s1
+ 1; s2
< slabinfo
+ slabs
; s2
++) {
1011 result
= slab_size(s1
) < slab_size(s2
);
1012 else if (sort_active
)
1013 result
= slab_activity(s1
) < slab_activity(s2
);
1015 result
= strcasecmp(s1
->name
, s2
->name
);
1023 memcpy(&t
, s1
, sizeof(struct slabinfo
));
1024 memcpy(s1
, s2
, sizeof(struct slabinfo
));
1025 memcpy(s2
, &t
, sizeof(struct slabinfo
));
1031 static void sort_aliases(void)
1033 struct aliasinfo
*a1
,*a2
;
1035 for (a1
= aliasinfo
; a1
< aliasinfo
+ aliases
; a1
++) {
1036 for (a2
= a1
+ 1; a2
< aliasinfo
+ aliases
; a2
++) {
1041 if (show_alias
&& !show_inverted
) {
1045 if (strcasecmp(n1
, n2
) > 0) {
1048 memcpy(&t
, a1
, sizeof(struct aliasinfo
));
1049 memcpy(a1
, a2
, sizeof(struct aliasinfo
));
1050 memcpy(a2
, &t
, sizeof(struct aliasinfo
));
1056 static void link_slabs(void)
1058 struct aliasinfo
*a
;
1061 for (a
= aliasinfo
; a
< aliasinfo
+ aliases
; a
++) {
1063 for (s
= slabinfo
; s
< slabinfo
+ slabs
; s
++)
1064 if (strcmp(a
->ref
, s
->name
) == 0) {
1069 if (s
== slabinfo
+ slabs
)
1070 fatal("Unresolved alias %s\n", a
->ref
);
1074 static void alias(void)
1076 struct aliasinfo
*a
;
1077 char *active
= NULL
;
1082 for(a
= aliasinfo
; a
< aliasinfo
+ aliases
; a
++) {
1084 if (!show_single_ref
&& a
->slab
->refs
== 1)
1087 if (!show_inverted
) {
1089 if (strcmp(a
->slab
->name
, active
) == 0) {
1090 printf(" %s", a
->name
);
1094 printf("\n%-12s <- %s", a
->slab
->name
, a
->name
);
1095 active
= a
->slab
->name
;
1098 printf("%-20s -> %s\n", a
->name
, a
->slab
->name
);
1105 static void rename_slabs(void)
1108 struct aliasinfo
*a
;
1110 for (s
= slabinfo
; s
< slabinfo
+ slabs
; s
++) {
1111 if (*s
->name
!= ':')
1114 if (s
->refs
> 1 && !show_first_alias
)
1117 a
= find_one_alias(s
);
1128 static int slab_mismatch(char *slab
)
1130 return regexec(&pattern
, slab
, 0, NULL
, 0);
1133 static void read_slab_dir(void)
1137 struct slabinfo
*slab
= slabinfo
;
1138 struct aliasinfo
*alias
= aliasinfo
;
1143 if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
1144 fatal("SYSFS support for SLUB not active\n");
1147 while ((de
= readdir(dir
))) {
1148 if (de
->d_name
[0] == '.' ||
1149 (de
->d_name
[0] != ':' && slab_mismatch(de
->d_name
)))
1151 switch (de
->d_type
) {
1153 alias
->name
= strdup(de
->d_name
);
1154 count
= readlink(de
->d_name
, buffer
, sizeof(buffer
)-1);
1157 fatal("Cannot read symlink %s\n", de
->d_name
);
1161 while (p
> buffer
&& p
[-1] != '/')
1163 alias
->ref
= strdup(p
);
1167 if (chdir(de
->d_name
))
1168 fatal("Unable to access slab %s\n", slab
->name
);
1169 slab
->name
= strdup(de
->d_name
);
1172 slab
->aliases
= get_obj("aliases");
1173 slab
->align
= get_obj("align");
1174 slab
->cache_dma
= get_obj("cache_dma");
1175 slab
->cpu_slabs
= get_obj("cpu_slabs");
1176 slab
->destroy_by_rcu
= get_obj("destroy_by_rcu");
1177 slab
->hwcache_align
= get_obj("hwcache_align");
1178 slab
->object_size
= get_obj("object_size");
1179 slab
->objects
= get_obj("objects");
1180 slab
->objects_partial
= get_obj("objects_partial");
1181 slab
->objects_total
= get_obj("objects_total");
1182 slab
->objs_per_slab
= get_obj("objs_per_slab");
1183 slab
->order
= get_obj("order");
1184 slab
->partial
= get_obj("partial");
1185 slab
->partial
= get_obj_and_str("partial", &t
);
1186 decode_numa_list(slab
->numa_partial
, t
);
1188 slab
->poison
= get_obj("poison");
1189 slab
->reclaim_account
= get_obj("reclaim_account");
1190 slab
->red_zone
= get_obj("red_zone");
1191 slab
->sanity_checks
= get_obj("sanity_checks");
1192 slab
->slab_size
= get_obj("slab_size");
1193 slab
->slabs
= get_obj_and_str("slabs", &t
);
1194 decode_numa_list(slab
->numa
, t
);
1196 slab
->store_user
= get_obj("store_user");
1197 slab
->trace
= get_obj("trace");
1198 slab
->alloc_fastpath
= get_obj("alloc_fastpath");
1199 slab
->alloc_slowpath
= get_obj("alloc_slowpath");
1200 slab
->free_fastpath
= get_obj("free_fastpath");
1201 slab
->free_slowpath
= get_obj("free_slowpath");
1202 slab
->free_frozen
= get_obj("free_frozen");
1203 slab
->free_add_partial
= get_obj("free_add_partial");
1204 slab
->free_remove_partial
= get_obj("free_remove_partial");
1205 slab
->alloc_from_partial
= get_obj("alloc_from_partial");
1206 slab
->alloc_slab
= get_obj("alloc_slab");
1207 slab
->alloc_refill
= get_obj("alloc_refill");
1208 slab
->free_slab
= get_obj("free_slab");
1209 slab
->cpuslab_flush
= get_obj("cpuslab_flush");
1210 slab
->deactivate_full
= get_obj("deactivate_full");
1211 slab
->deactivate_empty
= get_obj("deactivate_empty");
1212 slab
->deactivate_to_head
= get_obj("deactivate_to_head");
1213 slab
->deactivate_to_tail
= get_obj("deactivate_to_tail");
1214 slab
->deactivate_remote_frees
= get_obj("deactivate_remote_frees");
1215 slab
->order_fallback
= get_obj("order_fallback");
1216 slab
->cmpxchg_double_cpu_fail
= get_obj("cmpxchg_double_cpu_fail");
1217 slab
->cmpxchg_double_fail
= get_obj("cmpxchg_double_fail");
1218 slab
->cpu_partial_alloc
= get_obj("cpu_partial_alloc");
1219 slab
->cpu_partial_free
= get_obj("cpu_partial_free");
1220 slab
->alloc_node_mismatch
= get_obj("alloc_node_mismatch");
1221 slab
->deactivate_bypass
= get_obj("deactivate_bypass");
1223 if (slab
->name
[0] == ':')
1228 fatal("Unknown file type %lx\n", de
->d_type
);
1232 slabs
= slab
- slabinfo
;
1233 actual_slabs
= slabs
;
1234 aliases
= alias
- aliasinfo
;
1235 if (slabs
> MAX_SLABS
)
1236 fatal("Too many slabs\n");
1237 if (aliases
> MAX_ALIASES
)
1238 fatal("Too many aliases\n");
1241 static void output_slabs(void)
1243 struct slabinfo
*slab
;
1245 for (slab
= slabinfo
; slab
< slabinfo
+ slabs
; slab
++) {
1253 else if (show_track
)
1254 show_tracking(slab
);
1256 slab_validate(slab
);
1265 else if (show_report
)
1270 struct option opts
[] = {
1271 { "aliases", 0, NULL
, 'a' },
1272 { "activity", 0, NULL
, 'A' },
1273 { "debug", 2, NULL
, 'd' },
1274 { "display-activity", 0, NULL
, 'D' },
1275 { "empty", 0, NULL
, 'e' },
1276 { "first-alias", 0, NULL
, 'f' },
1277 { "help", 0, NULL
, 'h' },
1278 { "inverted", 0, NULL
, 'i'},
1279 { "numa", 0, NULL
, 'n' },
1280 { "ops", 0, NULL
, 'o' },
1281 { "report", 0, NULL
, 'r' },
1282 { "shrink", 0, NULL
, 's' },
1283 { "slabs", 0, NULL
, 'l' },
1284 { "track", 0, NULL
, 't'},
1285 { "validate", 0, NULL
, 'v' },
1286 { "zero", 0, NULL
, 'z' },
1287 { "1ref", 0, NULL
, '1'},
1288 { NULL
, 0, NULL
, 0 }
1291 int main(int argc
, char *argv
[])
1295 char *pattern_source
;
1297 page_size
= getpagesize();
1299 while ((c
= getopt_long(argc
, argv
, "aAd::Defhil1noprstvzTS",
1303 show_single_ref
= 1;
1313 if (!debug_opt_scan(optarg
))
1314 fatal("Invalid debug option '%s'\n", optarg
);
1323 show_first_alias
= 1;
1363 fatal("%s: Invalid option '%c'\n", argv
[0], optopt
);
1367 if (!show_slab
&& !show_alias
&& !show_track
&& !show_report
1368 && !validate
&& !shrink
&& !set_debug
&& !show_ops
)
1372 pattern_source
= argv
[optind
];
1374 pattern_source
= ".*";
1376 err
= regcomp(&pattern
, pattern_source
, REG_ICASE
|REG_NOSUB
);
1378 fatal("%s: Invalid pattern '%s' code %d\n",
1379 argv
[0], pattern_source
, err
);
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