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-rw-r--r--Documentation/vm/slabinfo.c943
1 files changed, 943 insertions, 0 deletions
diff --git a/Documentation/vm/slabinfo.c b/Documentation/vm/slabinfo.c
new file mode 100644
index 000000000000..41710ccf3a29
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+++ b/Documentation/vm/slabinfo.c
@@ -0,0 +1,943 @@
1/*
2 * Slabinfo: Tool to get reports about slabs
3 *
4 * (C) 2007 sgi, Christoph Lameter <clameter@sgi.com>
5 *
6 * Compile by:
7 *
8 * gcc -o slabinfo slabinfo.c
9 */
10#include <stdio.h>
11#include <stdlib.h>
12#include <sys/types.h>
13#include <dirent.h>
14#include <string.h>
15#include <unistd.h>
16#include <stdarg.h>
17#include <getopt.h>
18#include <regex.h>
19
20#define MAX_SLABS 500
21#define MAX_ALIASES 500
22#define MAX_NODES 1024
23
24struct slabinfo {
25 char *name;
26 int alias;
27 int refs;
28 int aliases, align, cache_dma, cpu_slabs, destroy_by_rcu;
29 int hwcache_align, object_size, objs_per_slab;
30 int sanity_checks, slab_size, store_user, trace;
31 int order, poison, reclaim_account, red_zone;
32 unsigned long partial, objects, slabs;
33 int numa[MAX_NODES];
34 int numa_partial[MAX_NODES];
35} slabinfo[MAX_SLABS];
36
37struct aliasinfo {
38 char *name;
39 char *ref;
40 struct slabinfo *slab;
41} aliasinfo[MAX_ALIASES];
42
43int slabs = 0;
44int aliases = 0;
45int alias_targets = 0;
46int highest_node = 0;
47
48char buffer[4096];
49
50int show_alias = 0;
51int show_slab = 0;
52int skip_zero = 1;
53int show_numa = 0;
54int show_track = 0;
55int show_first_alias = 0;
56int validate = 0;
57int shrink = 0;
58int show_inverted = 0;
59int show_single_ref = 0;
60int show_totals = 0;
61int sort_size = 0;
62
63int page_size;
64
65regex_t pattern;
66
67void fatal(const char *x, ...)
68{
69 va_list ap;
70
71 va_start(ap, x);
72 vfprintf(stderr, x, ap);
73 va_end(ap);
74 exit(1);
75}
76
77void usage(void)
78{
79 printf("slabinfo [-ahnpvtsz] [slab-regexp]\n"
80 "-a|--aliases Show aliases\n"
81 "-h|--help Show usage information\n"
82 "-n|--numa Show NUMA information\n"
83 "-s|--shrink Shrink slabs\n"
84 "-v|--validate Validate slabs\n"
85 "-t|--tracking Show alloc/free information\n"
86 "-T|--Totals Show summary information\n"
87 "-l|--slabs Show slabs\n"
88 "-S|--Size Sort by size\n"
89 "-z|--zero Include empty slabs\n"
90 "-f|--first-alias Show first alias\n"
91 "-i|--inverted Inverted list\n"
92 "-1|--1ref Single reference\n"
93 );
94}
95
96unsigned long read_obj(char *name)
97{
98 FILE *f = fopen(name, "r");
99
100 if (!f)
101 buffer[0] = 0;
102 else {
103 if (!fgets(buffer,sizeof(buffer), f))
104 buffer[0] = 0;
105 fclose(f);
106 if (buffer[strlen(buffer)] == '\n')
107 buffer[strlen(buffer)] = 0;
108 }
109 return strlen(buffer);
110}
111
112
113/*
114 * Get the contents of an attribute
115 */
116unsigned long get_obj(char *name)
117{
118 if (!read_obj(name))
119 return 0;
120
121 return atol(buffer);
122}
123
124unsigned long get_obj_and_str(char *name, char **x)
125{
126 unsigned long result = 0;
127 char *p;
128
129 *x = NULL;
130
131 if (!read_obj(name)) {
132 x = NULL;
133 return 0;
134 }
135 result = strtoul(buffer, &p, 10);
136 while (*p == ' ')
137 p++;
138 if (*p)
139 *x = strdup(p);
140 return result;
141}
142
143void set_obj(struct slabinfo *s, char *name, int n)
144{
145 char x[100];
146
147 sprintf(x, "%s/%s", s->name, name);
148
149 FILE *f = fopen(x, "w");
150
151 if (!f)
152 fatal("Cannot write to %s\n", x);
153
154 fprintf(f, "%d\n", n);
155 fclose(f);
156}
157
158/*
159 * Put a size string together
160 */
161int store_size(char *buffer, unsigned long value)
162{
163 unsigned long divisor = 1;
164 char trailer = 0;
165 int n;
166
167 if (value > 1000000000UL) {
168 divisor = 100000000UL;
169 trailer = 'G';
170 } else if (value > 1000000UL) {
171 divisor = 100000UL;
172 trailer = 'M';
173 } else if (value > 1000UL) {
174 divisor = 100;
175 trailer = 'K';
176 }
177
178 value /= divisor;
179 n = sprintf(buffer, "%ld",value);
180 if (trailer) {
181 buffer[n] = trailer;
182 n++;
183 buffer[n] = 0;
184 }
185 if (divisor != 1) {
186 memmove(buffer + n - 2, buffer + n - 3, 4);
187 buffer[n-2] = '.';
188 n++;
189 }
190 return n;
191}
192
193void decode_numa_list(int *numa, char *t)
194{
195 int node;
196 int nr;
197
198 memset(numa, 0, MAX_NODES * sizeof(int));
199
200 while (*t == 'N') {
201 t++;
202 node = strtoul(t, &t, 10);
203 if (*t == '=') {
204 t++;
205 nr = strtoul(t, &t, 10);
206 numa[node] = nr;
207 if (node > highest_node)
208 highest_node = node;
209 }
210 while (*t == ' ')
211 t++;
212 }
213}
214
215void slab_validate(struct slabinfo *s)
216{
217 set_obj(s, "validate", 1);
218}
219
220void slab_shrink(struct slabinfo *s)
221{
222 set_obj(s, "shrink", 1);
223}
224
225int line = 0;
226
227void first_line(void)
228{
229 printf("Name Objects Objsize Space "
230 "Slabs/Part/Cpu O/S O %%Fr %%Ef Flg\n");
231}
232
233/*
234 * Find the shortest alias of a slab
235 */
236struct aliasinfo *find_one_alias(struct slabinfo *find)
237{
238 struct aliasinfo *a;
239 struct aliasinfo *best = NULL;
240
241 for(a = aliasinfo;a < aliasinfo + aliases; a++) {
242 if (a->slab == find &&
243 (!best || strlen(best->name) < strlen(a->name))) {
244 best = a;
245 if (strncmp(a->name,"kmall", 5) == 0)
246 return best;
247 }
248 }
249 if (best)
250 return best;
251 fatal("Cannot find alias for %s\n", find->name);
252 return NULL;
253}
254
255unsigned long slab_size(struct slabinfo *s)
256{
257 return s->slabs * (page_size << s->order);
258}
259
260
261void slabcache(struct slabinfo *s)
262{
263 char size_str[20];
264 char dist_str[40];
265 char flags[20];
266 char *p = flags;
267
268 if (skip_zero && !s->slabs)
269 return;
270
271 store_size(size_str, slab_size(s));
272 sprintf(dist_str,"%lu/%lu/%d", s->slabs, s->partial, s->cpu_slabs);
273
274 if (!line++)
275 first_line();
276
277 if (s->aliases)
278 *p++ = '*';
279 if (s->cache_dma)
280 *p++ = 'd';
281 if (s->hwcache_align)
282 *p++ = 'A';
283 if (s->poison)
284 *p++ = 'P';
285 if (s->reclaim_account)
286 *p++ = 'a';
287 if (s->red_zone)
288 *p++ = 'Z';
289 if (s->sanity_checks)
290 *p++ = 'F';
291 if (s->store_user)
292 *p++ = 'U';
293 if (s->trace)
294 *p++ = 'T';
295
296 *p = 0;
297 printf("%-21s %8ld %7d %8s %14s %4d %1d %3ld %3ld %s\n",
298 s->name, s->objects, s->object_size, size_str, dist_str,
299 s->objs_per_slab, s->order,
300 s->slabs ? (s->partial * 100) / s->slabs : 100,
301 s->slabs ? (s->objects * s->object_size * 100) /
302 (s->slabs * (page_size << s->order)) : 100,
303 flags);
304}
305
306void slab_numa(struct slabinfo *s)
307{
308 int node;
309
310 if (!highest_node)
311 fatal("No NUMA information available.\n");
312
313 if (skip_zero && !s->slabs)
314 return;
315
316 if (!line) {
317 printf("\nSlab Node ");
318 for(node = 0; node <= highest_node; node++)
319 printf(" %4d", node);
320 printf("\n----------------------");
321 for(node = 0; node <= highest_node; node++)
322 printf("-----");
323 printf("\n");
324 }
325 printf("%-21s ", s->name);
326 for(node = 0; node <= highest_node; node++) {
327 char b[20];
328
329 store_size(b, s->numa[node]);
330 printf(" %4s", b);
331 }
332 printf("\n");
333 line++;
334}
335
336void show_tracking(struct slabinfo *s)
337{
338 printf("\n%s: Calls to allocate a slab object\n", s->name);
339 printf("---------------------------------------------------\n");
340 if (read_obj("alloc_calls"))
341 printf(buffer);
342
343 printf("%s: Calls to free a slab object\n", s->name);
344 printf("-----------------------------------------------\n");
345 if (read_obj("free_calls"))
346 printf(buffer);
347
348}
349
350void totals(void)
351{
352 struct slabinfo *s;
353
354 int used_slabs = 0;
355 char b1[20], b2[20], b3[20], b4[20];
356 unsigned long long max = 1ULL << 63;
357
358 /* Object size */
359 unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
360
361 /* Number of partial slabs in a slabcache */
362 unsigned long long min_partial = max, max_partial = 0,
363 avg_partial, total_partial = 0;
364
365 /* Number of slabs in a slab cache */
366 unsigned long long min_slabs = max, max_slabs = 0,
367 avg_slabs, total_slabs = 0;
368
369 /* Size of the whole slab */
370 unsigned long long min_size = max, max_size = 0,
371 avg_size, total_size = 0;
372
373 /* Bytes used for object storage in a slab */
374 unsigned long long min_used = max, max_used = 0,
375 avg_used, total_used = 0;
376
377 /* Waste: Bytes used for alignment and padding */
378 unsigned long long min_waste = max, max_waste = 0,
379 avg_waste, total_waste = 0;
380 /* Number of objects in a slab */
381 unsigned long long min_objects = max, max_objects = 0,
382 avg_objects, total_objects = 0;
383 /* Waste per object */
384 unsigned long long min_objwaste = max,
385 max_objwaste = 0, avg_objwaste,
386 total_objwaste = 0;
387
388 /* Memory per object */
389 unsigned long long min_memobj = max,
390 max_memobj = 0, avg_memobj,
391 total_objsize = 0;
392
393 /* Percentage of partial slabs per slab */
394 unsigned long min_ppart = 100, max_ppart = 0,
395 avg_ppart, total_ppart = 0;
396
397 /* Number of objects in partial slabs */
398 unsigned long min_partobj = max, max_partobj = 0,
399 avg_partobj, total_partobj = 0;
400
401 /* Percentage of partial objects of all objects in a slab */
402 unsigned long min_ppartobj = 100, max_ppartobj = 0,
403 avg_ppartobj, total_ppartobj = 0;
404
405
406 for (s = slabinfo; s < slabinfo + slabs; s++) {
407 unsigned long long size;
408 unsigned long used;
409 unsigned long long wasted;
410 unsigned long long objwaste;
411 long long objects_in_partial_slabs;
412 unsigned long percentage_partial_slabs;
413 unsigned long percentage_partial_objs;
414
415 if (!s->slabs || !s->objects)
416 continue;
417
418 used_slabs++;
419
420 size = slab_size(s);
421 used = s->objects * s->object_size;
422 wasted = size - used;
423 objwaste = s->slab_size - s->object_size;
424
425 objects_in_partial_slabs = s->objects -
426 (s->slabs - s->partial - s ->cpu_slabs) *
427 s->objs_per_slab;
428
429 if (objects_in_partial_slabs < 0)
430 objects_in_partial_slabs = 0;
431
432 percentage_partial_slabs = s->partial * 100 / s->slabs;
433 if (percentage_partial_slabs > 100)
434 percentage_partial_slabs = 100;
435
436 percentage_partial_objs = objects_in_partial_slabs * 100
437 / s->objects;
438
439 if (percentage_partial_objs > 100)
440 percentage_partial_objs = 100;
441
442 if (s->object_size < min_objsize)
443 min_objsize = s->object_size;
444 if (s->partial < min_partial)
445 min_partial = s->partial;
446 if (s->slabs < min_slabs)
447 min_slabs = s->slabs;
448 if (size < min_size)
449 min_size = size;
450 if (wasted < min_waste)
451 min_waste = wasted;
452 if (objwaste < min_objwaste)
453 min_objwaste = objwaste;
454 if (s->objects < min_objects)
455 min_objects = s->objects;
456 if (used < min_used)
457 min_used = used;
458 if (objects_in_partial_slabs < min_partobj)
459 min_partobj = objects_in_partial_slabs;
460 if (percentage_partial_slabs < min_ppart)
461 min_ppart = percentage_partial_slabs;
462 if (percentage_partial_objs < min_ppartobj)
463 min_ppartobj = percentage_partial_objs;
464 if (s->slab_size < min_memobj)
465 min_memobj = s->slab_size;
466
467 if (s->object_size > max_objsize)
468 max_objsize = s->object_size;
469 if (s->partial > max_partial)
470 max_partial = s->partial;
471 if (s->slabs > max_slabs)
472 max_slabs = s->slabs;
473 if (size > max_size)
474 max_size = size;
475 if (wasted > max_waste)
476 max_waste = wasted;
477 if (objwaste > max_objwaste)
478 max_objwaste = objwaste;
479 if (s->objects > max_objects)
480 max_objects = s->objects;
481 if (used > max_used)
482 max_used = used;
483 if (objects_in_partial_slabs > max_partobj)
484 max_partobj = objects_in_partial_slabs;
485 if (percentage_partial_slabs > max_ppart)
486 max_ppart = percentage_partial_slabs;
487 if (percentage_partial_objs > max_ppartobj)
488 max_ppartobj = percentage_partial_objs;
489 if (s->slab_size > max_memobj)
490 max_memobj = s->slab_size;
491
492 total_partial += s->partial;
493 total_slabs += s->slabs;
494 total_size += size;
495 total_waste += wasted;
496
497 total_objects += s->objects;
498 total_used += used;
499 total_partobj += objects_in_partial_slabs;
500 total_ppart += percentage_partial_slabs;
501 total_ppartobj += percentage_partial_objs;
502
503 total_objwaste += s->objects * objwaste;
504 total_objsize += s->objects * s->slab_size;
505 }
506
507 if (!total_objects) {
508 printf("No objects\n");
509 return;
510 }
511 if (!used_slabs) {
512 printf("No slabs\n");
513 return;
514 }
515
516 /* Per slab averages */
517 avg_partial = total_partial / used_slabs;
518 avg_slabs = total_slabs / used_slabs;
519 avg_size = total_size / used_slabs;
520 avg_waste = total_waste / used_slabs;
521
522 avg_objects = total_objects / used_slabs;
523 avg_used = total_used / used_slabs;
524 avg_partobj = total_partobj / used_slabs;
525 avg_ppart = total_ppart / used_slabs;
526 avg_ppartobj = total_ppartobj / used_slabs;
527
528 /* Per object object sizes */
529 avg_objsize = total_used / total_objects;
530 avg_objwaste = total_objwaste / total_objects;
531 avg_partobj = total_partobj * 100 / total_objects;
532 avg_memobj = total_objsize / total_objects;
533
534 printf("Slabcache Totals\n");
535 printf("----------------\n");
536 printf("Slabcaches : %3d Aliases : %3d->%-3d Active: %3d\n",
537 slabs, aliases, alias_targets, used_slabs);
538
539 store_size(b1, total_size);store_size(b2, total_waste);
540 store_size(b3, total_waste * 100 / total_used);
541 printf("Memory used: %6s # Loss : %6s MRatio: %6s%%\n", b1, b2, b3);
542
543 store_size(b1, total_objects);store_size(b2, total_partobj);
544 store_size(b3, total_partobj * 100 / total_objects);
545 printf("# Objects : %6s # PartObj: %6s ORatio: %6s%%\n", b1, b2, b3);
546
547 printf("\n");
548 printf("Per Cache Average Min Max Total\n");
549 printf("---------------------------------------------------------\n");
550
551 store_size(b1, avg_objects);store_size(b2, min_objects);
552 store_size(b3, max_objects);store_size(b4, total_objects);
553 printf("#Objects %10s %10s %10s %10s\n",
554 b1, b2, b3, b4);
555
556 store_size(b1, avg_slabs);store_size(b2, min_slabs);
557 store_size(b3, max_slabs);store_size(b4, total_slabs);
558 printf("#Slabs %10s %10s %10s %10s\n",
559 b1, b2, b3, b4);
560
561 store_size(b1, avg_partial);store_size(b2, min_partial);
562 store_size(b3, max_partial);store_size(b4, total_partial);
563 printf("#PartSlab %10s %10s %10s %10s\n",
564 b1, b2, b3, b4);
565 store_size(b1, avg_ppart);store_size(b2, min_ppart);
566 store_size(b3, max_ppart);
567 store_size(b4, total_partial * 100 / total_slabs);
568 printf("%%PartSlab %10s%% %10s%% %10s%% %10s%%\n",
569 b1, b2, b3, b4);
570
571 store_size(b1, avg_partobj);store_size(b2, min_partobj);
572 store_size(b3, max_partobj);
573 store_size(b4, total_partobj);
574 printf("PartObjs %10s %10s %10s %10s\n",
575 b1, b2, b3, b4);
576
577 store_size(b1, avg_ppartobj);store_size(b2, min_ppartobj);
578 store_size(b3, max_ppartobj);
579 store_size(b4, total_partobj * 100 / total_objects);
580 printf("%% PartObj %10s%% %10s%% %10s%% %10s%%\n",
581 b1, b2, b3, b4);
582
583 store_size(b1, avg_size);store_size(b2, min_size);
584 store_size(b3, max_size);store_size(b4, total_size);
585 printf("Memory %10s %10s %10s %10s\n",
586 b1, b2, b3, b4);
587
588 store_size(b1, avg_used);store_size(b2, min_used);
589 store_size(b3, max_used);store_size(b4, total_used);
590 printf("Used %10s %10s %10s %10s\n",
591 b1, b2, b3, b4);
592
593 store_size(b1, avg_waste);store_size(b2, min_waste);
594 store_size(b3, max_waste);store_size(b4, total_waste);
595 printf("Loss %10s %10s %10s %10s\n",
596 b1, b2, b3, b4);
597
598 printf("\n");
599 printf("Per Object Average Min Max\n");
600 printf("---------------------------------------------\n");
601
602 store_size(b1, avg_memobj);store_size(b2, min_memobj);
603 store_size(b3, max_memobj);
604 printf("Memory %10s %10s %10s\n",
605 b1, b2, b3);
606 store_size(b1, avg_objsize);store_size(b2, min_objsize);
607 store_size(b3, max_objsize);
608 printf("User %10s %10s %10s\n",
609 b1, b2, b3);
610
611 store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
612 store_size(b3, max_objwaste);
613 printf("Loss %10s %10s %10s\n",
614 b1, b2, b3);
615}
616
617void sort_slabs(void)
618{
619 struct slabinfo *s1,*s2;
620
621 for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
622 for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
623 int result;
624
625 if (sort_size)
626 result = slab_size(s1) < slab_size(s2);
627 else
628 result = strcasecmp(s1->name, s2->name);
629
630 if (show_inverted)
631 result = -result;
632
633 if (result > 0) {
634 struct slabinfo t;
635
636 memcpy(&t, s1, sizeof(struct slabinfo));
637 memcpy(s1, s2, sizeof(struct slabinfo));
638 memcpy(s2, &t, sizeof(struct slabinfo));
639 }
640 }
641 }
642}
643
644void sort_aliases(void)
645{
646 struct aliasinfo *a1,*a2;
647
648 for (a1 = aliasinfo; a1 < aliasinfo + aliases; a1++) {
649 for (a2 = a1 + 1; a2 < aliasinfo + aliases; a2++) {
650 char *n1, *n2;
651
652 n1 = a1->name;
653 n2 = a2->name;
654 if (show_alias && !show_inverted) {
655 n1 = a1->ref;
656 n2 = a2->ref;
657 }
658 if (strcasecmp(n1, n2) > 0) {
659 struct aliasinfo t;
660
661 memcpy(&t, a1, sizeof(struct aliasinfo));
662 memcpy(a1, a2, sizeof(struct aliasinfo));
663 memcpy(a2, &t, sizeof(struct aliasinfo));
664 }
665 }
666 }
667}
668
669void link_slabs(void)
670{
671 struct aliasinfo *a;
672 struct slabinfo *s;
673
674 for (a = aliasinfo; a < aliasinfo + aliases; a++) {
675
676 for(s = slabinfo; s < slabinfo + slabs; s++)
677 if (strcmp(a->ref, s->name) == 0) {
678 a->slab = s;
679 s->refs++;
680 break;
681 }
682 if (s == slabinfo + slabs)
683 fatal("Unresolved alias %s\n", a->ref);
684 }
685}
686
687void alias(void)
688{
689 struct aliasinfo *a;
690 char *active = NULL;
691
692 sort_aliases();
693 link_slabs();
694
695 for(a = aliasinfo; a < aliasinfo + aliases; a++) {
696
697 if (!show_single_ref && a->slab->refs == 1)
698 continue;
699
700 if (!show_inverted) {
701 if (active) {
702 if (strcmp(a->slab->name, active) == 0) {
703 printf(" %s", a->name);
704 continue;
705 }
706 }
707 printf("\n%-20s <- %s", a->slab->name, a->name);
708 active = a->slab->name;
709 }
710 else
711 printf("%-20s -> %s\n", a->name, a->slab->name);
712 }
713 if (active)
714 printf("\n");
715}
716
717
718void rename_slabs(void)
719{
720 struct slabinfo *s;
721 struct aliasinfo *a;
722
723 for (s = slabinfo; s < slabinfo + slabs; s++) {
724 if (*s->name != ':')
725 continue;
726
727 if (s->refs > 1 && !show_first_alias)
728 continue;
729
730 a = find_one_alias(s);
731
732 s->name = a->name;
733 }
734}
735
736int slab_mismatch(char *slab)
737{
738 return regexec(&pattern, slab, 0, NULL, 0);
739}
740
741void read_slab_dir(void)
742{
743 DIR *dir;
744 struct dirent *de;
745 struct slabinfo *slab = slabinfo;
746 struct aliasinfo *alias = aliasinfo;
747 char *p;
748 char *t;
749 int count;
750
751 dir = opendir(".");
752 while ((de = readdir(dir))) {
753 if (de->d_name[0] == '.' ||
754 slab_mismatch(de->d_name))
755 continue;
756 switch (de->d_type) {
757 case DT_LNK:
758 alias->name = strdup(de->d_name);
759 count = readlink(de->d_name, buffer, sizeof(buffer));
760
761 if (count < 0)
762 fatal("Cannot read symlink %s\n", de->d_name);
763
764 buffer[count] = 0;
765 p = buffer + count;
766 while (p > buffer && p[-1] != '/')
767 p--;
768 alias->ref = strdup(p);
769 alias++;
770 break;
771 case DT_DIR:
772 if (chdir(de->d_name))
773 fatal("Unable to access slab %s\n", slab->name);
774 slab->name = strdup(de->d_name);
775 slab->alias = 0;
776 slab->refs = 0;
777 slab->aliases = get_obj("aliases");
778 slab->align = get_obj("align");
779 slab->cache_dma = get_obj("cache_dma");
780 slab->cpu_slabs = get_obj("cpu_slabs");
781 slab->destroy_by_rcu = get_obj("destroy_by_rcu");
782 slab->hwcache_align = get_obj("hwcache_align");
783 slab->object_size = get_obj("object_size");
784 slab->objects = get_obj("objects");
785 slab->objs_per_slab = get_obj("objs_per_slab");
786 slab->order = get_obj("order");
787 slab->partial = get_obj("partial");
788 slab->partial = get_obj_and_str("partial", &t);
789 decode_numa_list(slab->numa_partial, t);
790 slab->poison = get_obj("poison");
791 slab->reclaim_account = get_obj("reclaim_account");
792 slab->red_zone = get_obj("red_zone");
793 slab->sanity_checks = get_obj("sanity_checks");
794 slab->slab_size = get_obj("slab_size");
795 slab->slabs = get_obj_and_str("slabs", &t);
796 decode_numa_list(slab->numa, t);
797 slab->store_user = get_obj("store_user");
798 slab->trace = get_obj("trace");
799 chdir("..");
800 if (slab->name[0] == ':')
801 alias_targets++;
802 slab++;
803 break;
804 default :
805 fatal("Unknown file type %lx\n", de->d_type);
806 }
807 }
808 closedir(dir);
809 slabs = slab - slabinfo;
810 aliases = alias - aliasinfo;
811 if (slabs > MAX_SLABS)
812 fatal("Too many slabs\n");
813 if (aliases > MAX_ALIASES)
814 fatal("Too many aliases\n");
815}
816
817void output_slabs(void)
818{
819 struct slabinfo *slab;
820
821 for (slab = slabinfo; slab < slabinfo + slabs; slab++) {
822
823 if (slab->alias)
824 continue;
825
826
827 if (show_numa)
828 slab_numa(slab);
829 else
830 if (show_track)
831 show_tracking(slab);
832 else
833 if (validate)
834 slab_validate(slab);
835 else
836 if (shrink)
837 slab_shrink(slab);
838 else {
839 if (show_slab)
840 slabcache(slab);
841 }
842 }
843}
844
845struct option opts[] = {
846 { "aliases", 0, NULL, 'a' },
847 { "slabs", 0, NULL, 'l' },
848 { "numa", 0, NULL, 'n' },
849 { "zero", 0, NULL, 'z' },
850 { "help", 0, NULL, 'h' },
851 { "validate", 0, NULL, 'v' },
852 { "first-alias", 0, NULL, 'f' },
853 { "shrink", 0, NULL, 's' },
854 { "track", 0, NULL, 't'},
855 { "inverted", 0, NULL, 'i'},
856 { "1ref", 0, NULL, '1'},
857 { NULL, 0, NULL, 0 }
858};
859
860int main(int argc, char *argv[])
861{
862 int c;
863 int err;
864 char *pattern_source;
865
866 page_size = getpagesize();
867 if (chdir("/sys/slab"))
868 fatal("This kernel does not have SLUB support.\n");
869
870 while ((c = getopt_long(argc, argv, "afhil1npstvzTS", opts, NULL)) != -1)
871 switch(c) {
872 case '1':
873 show_single_ref = 1;
874 break;
875 case 'a':
876 show_alias = 1;
877 break;
878 case 'f':
879 show_first_alias = 1;
880 break;
881 case 'h':
882 usage();
883 return 0;
884 case 'i':
885 show_inverted = 1;
886 break;
887 case 'n':
888 show_numa = 1;
889 break;
890 case 's':
891 shrink = 1;
892 break;
893 case 'l':
894 show_slab = 1;
895 break;
896 case 't':
897 show_track = 1;
898 break;
899 case 'v':
900 validate = 1;
901 break;
902 case 'z':
903 skip_zero = 0;
904 break;
905 case 'T':
906 show_totals = 1;
907 break;
908 case 'S':
909 sort_size = 1;
910 break;
911
912 default:
913 fatal("%s: Invalid option '%c'\n", argv[0], optopt);
914
915 }
916
917 if (!show_slab && !show_alias && !show_track
918 && !validate && !shrink)
919 show_slab = 1;
920
921 if (argc > optind)
922 pattern_source = argv[optind];
923 else
924 pattern_source = ".*";
925
926 err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
927 if (err)
928 fatal("%s: Invalid pattern '%s' code %d\n",
929 argv[0], pattern_source, err);
930 read_slab_dir();
931 if (show_alias)
932 alias();
933 else
934 if (show_totals)
935 totals();
936 else {
937 link_slabs();
938 rename_slabs();
939 sort_slabs();
940 output_slabs();
941 }
942 return 0;
943}