1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Slabinfo: Tool to get reports about slabs
4 *
5 * (C) 2007 sgi, Christoph Lameter
6 * (C) 2011 Linux Foundation, Christoph Lameter
7 *
8 * Compile with:
9 *
10 * gcc -o slabinfo slabinfo.c
11 */
12 #include <stdio.h>
13 #include <stdlib.h>
14 #include <sys/types.h>
15 #include <dirent.h>
16 #include <strings.h>
17 #include <string.h>
18 #include <unistd.h>
19 #include <stdarg.h>
20 #include <getopt.h>
21 #include <regex.h>
22 #include <errno.h>
23
24 #define MAX_SLABS 2000
25 #define MAX_ALIASES 500
26 #define MAX_NODES 1024
27
28 struct slabinfo {
29 char *name;
30 int alias;
31 int refs;
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;
47 int numa[MAX_NODES];
48 int numa_partial[MAX_NODES];
49 } slabinfo[MAX_SLABS];
50
51 struct aliasinfo {
52 char *name;
53 char *ref;
54 struct slabinfo *slab;
55 } aliasinfo[MAX_ALIASES];
56
57 int slabs;
58 int actual_slabs;
59 int aliases;
60 int alias_targets;
61 int highest_node;
62
63 char buffer[4096];
64
65 int show_empty;
66 int show_report;
67 int show_alias;
68 int show_slab;
69 int skip_zero = 1;
70 int show_numa;
71 int show_track;
72 int show_first_alias;
73 int validate;
74 int shrink;
75 int show_inverted;
76 int show_single_ref;
77 int show_totals;
78 int sort_size;
79 int sort_active;
80 int set_debug;
81 int show_ops;
82 int sort_partial;
83 int show_activity;
84 int output_lines = -1;
85 int sort_loss;
86 int extended_totals;
87 int show_bytes;
88 int unreclaim_only;
89
90 /* Debug options */
91 int sanity;
92 int redzone;
93 int poison;
94 int tracking;
95 int tracing;
96
97 int page_size;
98
99 regex_t pattern;
100
fatal(const char * x,...)101 static void fatal(const char *x, ...)
102 {
103 va_list ap;
104
105 va_start(ap, x);
106 vfprintf(stderr, x, ap);
107 va_end(ap);
108 exit(EXIT_FAILURE);
109 }
110
usage(void)111 static void usage(void)
112 {
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"
139
140 "\n"
141 "-d | --debug Switch off all debug options\n"
142 "-da | --debug=a Switch on all debug options (--debug=FZPU)\n"
143
144 "\n"
145 "-d[afzput] | --debug=[afzput]\n"
146 " f | F Sanity Checks (SLAB_CONSISTENCY_CHECKS)\n"
147 " z | Z Redzoning\n"
148 " p | P Poisoning\n"
149 " u | U Tracking\n"
150 " t | T Tracing\n"
151
152 "\nSorting options (--Loss, --Size, --Partial) are mutually exclusive\n"
153 );
154 }
155
read_obj(const char * name)156 static unsigned long read_obj(const char *name)
157 {
158 size_t len;
159 FILE *f = fopen(name, "r");
160
161 if (!f) {
162 buffer[0] = 0;
163 if (errno == EACCES)
164 fatal("%s, Try using superuser\n", strerror(errno));
165 } else {
166 if (!fgets(buffer, sizeof(buffer), f))
167 buffer[0] = 0;
168 fclose(f);
169 len = strlen(buffer);
170
171 if (len > 0 && buffer[len - 1] == '\n')
172 buffer[len - 1] = 0;
173 }
174 return strlen(buffer);
175 }
176
177
178 /*
179 * Get the contents of an attribute
180 */
get_obj(const char * name)181 static unsigned long get_obj(const char *name)
182 {
183 if (!read_obj(name))
184 return 0;
185
186 return atol(buffer);
187 }
188
get_obj_and_str(const char * name,char ** x)189 static unsigned long get_obj_and_str(const char *name, char **x)
190 {
191 unsigned long result = 0;
192 char *p;
193
194 *x = NULL;
195
196 if (!read_obj(name)) {
197 x = NULL;
198 return 0;
199 }
200 result = strtoul(buffer, &p, 10);
201 while (*p == ' ')
202 p++;
203 if (*p)
204 *x = strdup(p);
205 return result;
206 }
207
set_obj(struct slabinfo * s,const char * name,int n)208 static void set_obj(struct slabinfo *s, const char *name, int n)
209 {
210 char x[100];
211 FILE *f;
212
213 snprintf(x, 100, "%s/%s", s->name, name);
214 f = fopen(x, "w");
215 if (!f)
216 fatal("Cannot write to %s\n", x);
217
218 fprintf(f, "%d\n", n);
219 fclose(f);
220 }
221
read_slab_obj(struct slabinfo * s,const char * name)222 static unsigned long read_slab_obj(struct slabinfo *s, const char *name)
223 {
224 char x[100];
225 FILE *f;
226 size_t l;
227
228 snprintf(x, 100, "%s/%s", s->name, name);
229 f = fopen(x, "r");
230 if (!f) {
231 buffer[0] = 0;
232 l = 0;
233 } else {
234 l = fread(buffer, 1, sizeof(buffer), f);
235 buffer[l] = 0;
236 fclose(f);
237 }
238 return l;
239 }
240
read_debug_slab_obj(struct slabinfo * s,const char * name)241 static unsigned long read_debug_slab_obj(struct slabinfo *s, const char *name)
242 {
243 char x[128];
244 FILE *f;
245 size_t l;
246
247 snprintf(x, 128, "/sys/kernel/debug/slab/%s/%s", s->name, name);
248 f = fopen(x, "r");
249 if (!f) {
250 buffer[0] = 0;
251 l = 0;
252 } else {
253 l = fread(buffer, 1, sizeof(buffer), f);
254 buffer[l] = 0;
255 fclose(f);
256 }
257 return l;
258 }
259
260 /*
261 * Put a size string together
262 */
store_size(char * buffer,unsigned long value)263 static int store_size(char *buffer, unsigned long value)
264 {
265 unsigned long divisor = 1;
266 char trailer = 0;
267 int n;
268
269 if (!show_bytes) {
270 if (value > 1000000000UL) {
271 divisor = 100000000UL;
272 trailer = 'G';
273 } else if (value > 1000000UL) {
274 divisor = 100000UL;
275 trailer = 'M';
276 } else if (value > 1000UL) {
277 divisor = 100;
278 trailer = 'K';
279 }
280 }
281
282 value /= divisor;
283 n = sprintf(buffer, "%ld",value);
284 if (trailer) {
285 buffer[n] = trailer;
286 n++;
287 buffer[n] = 0;
288 }
289 if (divisor != 1) {
290 memmove(buffer + n - 2, buffer + n - 3, 4);
291 buffer[n-2] = '.';
292 n++;
293 }
294 return n;
295 }
296
decode_numa_list(int * numa,char * t)297 static void decode_numa_list(int *numa, char *t)
298 {
299 int node;
300 int nr;
301
302 memset(numa, 0, MAX_NODES * sizeof(int));
303
304 if (!t)
305 return;
306
307 while (*t == 'N') {
308 t++;
309 node = strtoul(t, &t, 10);
310 if (*t == '=') {
311 t++;
312 nr = strtoul(t, &t, 10);
313 numa[node] = nr;
314 if (node > highest_node)
315 highest_node = node;
316 }
317 while (*t == ' ')
318 t++;
319 }
320 }
321
slab_validate(struct slabinfo * s)322 static void slab_validate(struct slabinfo *s)
323 {
324 if (strcmp(s->name, "*") == 0)
325 return;
326
327 set_obj(s, "validate", 1);
328 }
329
slab_shrink(struct slabinfo * s)330 static void slab_shrink(struct slabinfo *s)
331 {
332 if (strcmp(s->name, "*") == 0)
333 return;
334
335 set_obj(s, "shrink", 1);
336 }
337
338 int line = 0;
339
first_line(void)340 static void first_line(void)
341 {
342 if (show_activity)
343 printf("Name Objects Alloc Free"
344 " %%Fast Fallb O CmpX UL\n");
345 else
346 printf("Name Objects Objsize %s "
347 "Slabs/Part/Cpu O/S O %%Fr %%Ef Flg\n",
348 sort_loss ? " Loss" : "Space");
349 }
350
351 /*
352 * Find the shortest alias of a slab
353 */
find_one_alias(struct slabinfo * find)354 static struct aliasinfo *find_one_alias(struct slabinfo *find)
355 {
356 struct aliasinfo *a;
357 struct aliasinfo *best = NULL;
358
359 for(a = aliasinfo;a < aliasinfo + aliases; a++) {
360 if (a->slab == find &&
361 (!best || strlen(best->name) < strlen(a->name))) {
362 best = a;
363 if (strncmp(a->name,"kmall", 5) == 0)
364 return best;
365 }
366 }
367 return best;
368 }
369
slab_size(struct slabinfo * s)370 static unsigned long slab_size(struct slabinfo *s)
371 {
372 return s->slabs * (page_size << s->order);
373 }
374
slab_activity(struct slabinfo * s)375 static unsigned long slab_activity(struct slabinfo *s)
376 {
377 return s->alloc_fastpath + s->free_fastpath +
378 s->alloc_slowpath + s->free_slowpath;
379 }
380
slab_waste(struct slabinfo * s)381 static unsigned long slab_waste(struct slabinfo *s)
382 {
383 return slab_size(s) - s->objects * s->object_size;
384 }
385
slab_numa(struct slabinfo * s,int mode)386 static void slab_numa(struct slabinfo *s, int mode)
387 {
388 int node;
389
390 if (strcmp(s->name, "*") == 0)
391 return;
392
393 if (!highest_node) {
394 printf("\n%s: No NUMA information available.\n", s->name);
395 return;
396 }
397
398 if (skip_zero && !s->slabs)
399 return;
400
401 if (!line) {
402 printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
403 for(node = 0; node <= highest_node; node++)
404 printf(" %4d", node);
405 printf("\n----------------------");
406 for(node = 0; node <= highest_node; node++)
407 printf("-----");
408 printf("\n");
409 }
410 printf("%-21s ", mode ? "All slabs" : s->name);
411 for(node = 0; node <= highest_node; node++) {
412 char b[20];
413
414 store_size(b, s->numa[node]);
415 printf(" %4s", b);
416 }
417 printf("\n");
418 if (mode) {
419 printf("%-21s ", "Partial slabs");
420 for(node = 0; node <= highest_node; node++) {
421 char b[20];
422
423 store_size(b, s->numa_partial[node]);
424 printf(" %4s", b);
425 }
426 printf("\n");
427 }
428 line++;
429 }
430
show_tracking(struct slabinfo * s)431 static void show_tracking(struct slabinfo *s)
432 {
433 printf("\n%s: Kernel object allocation\n", s->name);
434 printf("-----------------------------------------------------------------------\n");
435 if (read_debug_slab_obj(s, "alloc_traces"))
436 printf("%s", buffer);
437 else if (read_slab_obj(s, "alloc_calls"))
438 printf("%s", buffer);
439 else
440 printf("No Data\n");
441
442 printf("\n%s: Kernel object freeing\n", s->name);
443 printf("------------------------------------------------------------------------\n");
444 if (read_debug_slab_obj(s, "free_traces"))
445 printf("%s", buffer);
446 else if (read_slab_obj(s, "free_calls"))
447 printf("%s", buffer);
448 else
449 printf("No Data\n");
450
451 }
452
ops(struct slabinfo * s)453 static void ops(struct slabinfo *s)
454 {
455 if (strcmp(s->name, "*") == 0)
456 return;
457
458 if (read_slab_obj(s, "ops")) {
459 printf("\n%s: kmem_cache operations\n", s->name);
460 printf("--------------------------------------------\n");
461 printf("%s", buffer);
462 } else
463 printf("\n%s has no kmem_cache operations\n", s->name);
464 }
465
onoff(int x)466 static const char *onoff(int x)
467 {
468 if (x)
469 return "On ";
470 return "Off";
471 }
472
slab_stats(struct slabinfo * s)473 static void slab_stats(struct slabinfo *s)
474 {
475 unsigned long total_alloc;
476 unsigned long total_free;
477 unsigned long total;
478
479 if (!s->alloc_slab)
480 return;
481
482 total_alloc = s->alloc_fastpath + s->alloc_slowpath;
483 total_free = s->free_fastpath + s->free_slowpath;
484
485 if (!total_alloc)
486 return;
487
488 printf("\n");
489 printf("Slab Perf Counter Alloc Free %%Al %%Fr\n");
490 printf("--------------------------------------------------\n");
491 printf("Fastpath %8lu %8lu %3lu %3lu\n",
492 s->alloc_fastpath, s->free_fastpath,
493 s->alloc_fastpath * 100 / total_alloc,
494 total_free ? s->free_fastpath * 100 / total_free : 0);
495 printf("Slowpath %8lu %8lu %3lu %3lu\n",
496 total_alloc - s->alloc_fastpath, s->free_slowpath,
497 (total_alloc - s->alloc_fastpath) * 100 / total_alloc,
498 total_free ? s->free_slowpath * 100 / total_free : 0);
499 printf("Page Alloc %8lu %8lu %3lu %3lu\n",
500 s->alloc_slab, s->free_slab,
501 s->alloc_slab * 100 / total_alloc,
502 total_free ? s->free_slab * 100 / total_free : 0);
503 printf("Add partial %8lu %8lu %3lu %3lu\n",
504 s->deactivate_to_head + s->deactivate_to_tail,
505 s->free_add_partial,
506 (s->deactivate_to_head + s->deactivate_to_tail) * 100 / total_alloc,
507 total_free ? s->free_add_partial * 100 / total_free : 0);
508 printf("Remove partial %8lu %8lu %3lu %3lu\n",
509 s->alloc_from_partial, s->free_remove_partial,
510 s->alloc_from_partial * 100 / total_alloc,
511 total_free ? s->free_remove_partial * 100 / total_free : 0);
512
513 printf("Cpu partial list %8lu %8lu %3lu %3lu\n",
514 s->cpu_partial_alloc, s->cpu_partial_free,
515 s->cpu_partial_alloc * 100 / total_alloc,
516 total_free ? s->cpu_partial_free * 100 / total_free : 0);
517
518 printf("RemoteObj/SlabFrozen %8lu %8lu %3lu %3lu\n",
519 s->deactivate_remote_frees, s->free_frozen,
520 s->deactivate_remote_frees * 100 / total_alloc,
521 total_free ? s->free_frozen * 100 / total_free : 0);
522
523 printf("Total %8lu %8lu\n\n", total_alloc, total_free);
524
525 if (s->cpuslab_flush)
526 printf("Flushes %8lu\n", s->cpuslab_flush);
527
528 total = s->deactivate_full + s->deactivate_empty +
529 s->deactivate_to_head + s->deactivate_to_tail + s->deactivate_bypass;
530
531 if (total) {
532 printf("\nSlab Deactivation Occurrences %%\n");
533 printf("-------------------------------------------------\n");
534 printf("Slab full %7lu %3lu%%\n",
535 s->deactivate_full, (s->deactivate_full * 100) / total);
536 printf("Slab empty %7lu %3lu%%\n",
537 s->deactivate_empty, (s->deactivate_empty * 100) / total);
538 printf("Moved to head of partial list %7lu %3lu%%\n",
539 s->deactivate_to_head, (s->deactivate_to_head * 100) / total);
540 printf("Moved to tail of partial list %7lu %3lu%%\n",
541 s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total);
542 printf("Deactivation bypass %7lu %3lu%%\n",
543 s->deactivate_bypass, (s->deactivate_bypass * 100) / total);
544 printf("Refilled from foreign frees %7lu %3lu%%\n",
545 s->alloc_refill, (s->alloc_refill * 100) / total);
546 printf("Node mismatch %7lu %3lu%%\n",
547 s->alloc_node_mismatch, (s->alloc_node_mismatch * 100) / total);
548 }
549
550 if (s->cmpxchg_double_fail || s->cmpxchg_double_cpu_fail) {
551 printf("\nCmpxchg_double Looping\n------------------------\n");
552 printf("Locked Cmpxchg Double redos %lu\nUnlocked Cmpxchg Double redos %lu\n",
553 s->cmpxchg_double_fail, s->cmpxchg_double_cpu_fail);
554 }
555 }
556
report(struct slabinfo * s)557 static void report(struct slabinfo *s)
558 {
559 if (strcmp(s->name, "*") == 0)
560 return;
561
562 printf("\nSlabcache: %-15s Aliases: %2d Order : %2d Objects: %lu\n",
563 s->name, s->aliases, s->order, s->objects);
564 if (s->hwcache_align)
565 printf("** Hardware cacheline aligned\n");
566 if (s->cache_dma)
567 printf("** Memory is allocated in a special DMA zone\n");
568 if (s->destroy_by_rcu)
569 printf("** Slabs are destroyed via RCU\n");
570 if (s->reclaim_account)
571 printf("** Reclaim accounting active\n");
572
573 printf("\nSizes (bytes) Slabs Debug Memory\n");
574 printf("------------------------------------------------------------------------\n");
575 printf("Object : %7d Total : %7ld Sanity Checks : %s Total: %7ld\n",
576 s->object_size, s->slabs, onoff(s->sanity_checks),
577 s->slabs * (page_size << s->order));
578 printf("SlabObj: %7d Full : %7ld Redzoning : %s Used : %7ld\n",
579 s->slab_size, s->slabs - s->partial - s->cpu_slabs,
580 onoff(s->red_zone), s->objects * s->object_size);
581 printf("SlabSiz: %7d Partial: %7ld Poisoning : %s Loss : %7ld\n",
582 page_size << s->order, s->partial, onoff(s->poison),
583 s->slabs * (page_size << s->order) - s->objects * s->object_size);
584 printf("Loss : %7d CpuSlab: %7d Tracking : %s Lalig: %7ld\n",
585 s->slab_size - s->object_size, s->cpu_slabs, onoff(s->store_user),
586 (s->slab_size - s->object_size) * s->objects);
587 printf("Align : %7d Objects: %7d Tracing : %s Lpadd: %7ld\n",
588 s->align, s->objs_per_slab, onoff(s->trace),
589 ((page_size << s->order) - s->objs_per_slab * s->slab_size) *
590 s->slabs);
591
592 ops(s);
593 show_tracking(s);
594 slab_numa(s, 1);
595 slab_stats(s);
596 }
597
slabcache(struct slabinfo * s)598 static void slabcache(struct slabinfo *s)
599 {
600 char size_str[20];
601 char dist_str[40];
602 char flags[20];
603 char *p = flags;
604
605 if (strcmp(s->name, "*") == 0)
606 return;
607
608 if (unreclaim_only && s->reclaim_account)
609 return;
610
611 if (actual_slabs == 1) {
612 report(s);
613 return;
614 }
615
616 if (skip_zero && !show_empty && !s->slabs)
617 return;
618
619 if (show_empty && s->slabs)
620 return;
621
622 if (sort_loss == 0)
623 store_size(size_str, slab_size(s));
624 else
625 store_size(size_str, slab_waste(s));
626 snprintf(dist_str, 40, "%lu/%lu/%d", s->slabs - s->cpu_slabs,
627 s->partial, s->cpu_slabs);
628
629 if (!line++)
630 first_line();
631
632 if (s->aliases)
633 *p++ = '*';
634 if (s->cache_dma)
635 *p++ = 'd';
636 if (s->hwcache_align)
637 *p++ = 'A';
638 if (s->poison)
639 *p++ = 'P';
640 if (s->reclaim_account)
641 *p++ = 'a';
642 if (s->red_zone)
643 *p++ = 'Z';
644 if (s->sanity_checks)
645 *p++ = 'F';
646 if (s->store_user)
647 *p++ = 'U';
648 if (s->trace)
649 *p++ = 'T';
650
651 *p = 0;
652 if (show_activity) {
653 unsigned long total_alloc;
654 unsigned long total_free;
655
656 total_alloc = s->alloc_fastpath + s->alloc_slowpath;
657 total_free = s->free_fastpath + s->free_slowpath;
658
659 printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d %4ld %4ld\n",
660 s->name, s->objects,
661 total_alloc, total_free,
662 total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,
663 total_free ? (s->free_fastpath * 100 / total_free) : 0,
664 s->order_fallback, s->order, s->cmpxchg_double_fail,
665 s->cmpxchg_double_cpu_fail);
666 } else {
667 printf("%-21s %8ld %7d %15s %14s %4d %1d %3ld %3ld %s\n",
668 s->name, s->objects, s->object_size, size_str, dist_str,
669 s->objs_per_slab, s->order,
670 s->slabs ? (s->partial * 100) / s->slabs : 100,
671 s->slabs ? (s->objects * s->object_size * 100) /
672 (s->slabs * (page_size << s->order)) : 100,
673 flags);
674 }
675 }
676
677 /*
678 * Analyze debug options. Return false if something is amiss.
679 */
debug_opt_scan(char * opt)680 static int debug_opt_scan(char *opt)
681 {
682 if (!opt || !opt[0] || strcmp(opt, "-") == 0)
683 return 1;
684
685 if (strcasecmp(opt, "a") == 0) {
686 sanity = 1;
687 poison = 1;
688 redzone = 1;
689 tracking = 1;
690 return 1;
691 }
692
693 for ( ; *opt; opt++)
694 switch (*opt) {
695 case 'F' : case 'f':
696 if (sanity)
697 return 0;
698 sanity = 1;
699 break;
700 case 'P' : case 'p':
701 if (poison)
702 return 0;
703 poison = 1;
704 break;
705
706 case 'Z' : case 'z':
707 if (redzone)
708 return 0;
709 redzone = 1;
710 break;
711
712 case 'U' : case 'u':
713 if (tracking)
714 return 0;
715 tracking = 1;
716 break;
717
718 case 'T' : case 't':
719 if (tracing)
720 return 0;
721 tracing = 1;
722 break;
723 default:
724 return 0;
725 }
726 return 1;
727 }
728
slab_empty(struct slabinfo * s)729 static int slab_empty(struct slabinfo *s)
730 {
731 if (s->objects > 0)
732 return 0;
733
734 /*
735 * We may still have slabs even if there are no objects. Shrinking will
736 * remove them.
737 */
738 if (s->slabs != 0)
739 set_obj(s, "shrink", 1);
740
741 return 1;
742 }
743
slab_debug(struct slabinfo * s)744 static void slab_debug(struct slabinfo *s)
745 {
746 if (strcmp(s->name, "*") == 0)
747 return;
748
749 if (sanity && !s->sanity_checks) {
750 set_obj(s, "sanity_checks", 1);
751 }
752 if (!sanity && s->sanity_checks) {
753 if (slab_empty(s))
754 set_obj(s, "sanity_checks", 0);
755 else
756 fprintf(stderr, "%s not empty cannot disable sanity checks\n", s->name);
757 }
758 if (redzone && !s->red_zone) {
759 if (slab_empty(s))
760 set_obj(s, "red_zone", 1);
761 else
762 fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
763 }
764 if (!redzone && s->red_zone) {
765 if (slab_empty(s))
766 set_obj(s, "red_zone", 0);
767 else
768 fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
769 }
770 if (poison && !s->poison) {
771 if (slab_empty(s))
772 set_obj(s, "poison", 1);
773 else
774 fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
775 }
776 if (!poison && s->poison) {
777 if (slab_empty(s))
778 set_obj(s, "poison", 0);
779 else
780 fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
781 }
782 if (tracking && !s->store_user) {
783 if (slab_empty(s))
784 set_obj(s, "store_user", 1);
785 else
786 fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
787 }
788 if (!tracking && s->store_user) {
789 if (slab_empty(s))
790 set_obj(s, "store_user", 0);
791 else
792 fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
793 }
794 if (tracing && !s->trace) {
795 if (slabs == 1)
796 set_obj(s, "trace", 1);
797 else
798 fprintf(stderr, "%s can only enable trace for one slab at a time\n", s->name);
799 }
800 if (!tracing && s->trace)
801 set_obj(s, "trace", 1);
802 }
803
totals(void)804 static void totals(void)
805 {
806 struct slabinfo *s;
807
808 int used_slabs = 0;
809 char b1[20], b2[20], b3[20], b4[20];
810 unsigned long long max = 1ULL << 63;
811
812 /* Object size */
813 unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
814
815 /* Number of partial slabs in a slabcache */
816 unsigned long long min_partial = max, max_partial = 0,
817 avg_partial, total_partial = 0;
818
819 /* Number of slabs in a slab cache */
820 unsigned long long min_slabs = max, max_slabs = 0,
821 avg_slabs, total_slabs = 0;
822
823 /* Size of the whole slab */
824 unsigned long long min_size = max, max_size = 0,
825 avg_size, total_size = 0;
826
827 /* Bytes used for object storage in a slab */
828 unsigned long long min_used = max, max_used = 0,
829 avg_used, total_used = 0;
830
831 /* Waste: Bytes used for alignment and padding */
832 unsigned long long min_waste = max, max_waste = 0,
833 avg_waste, total_waste = 0;
834 /* Number of objects in a slab */
835 unsigned long long min_objects = max, max_objects = 0,
836 avg_objects, total_objects = 0;
837 /* Waste per object */
838 unsigned long long min_objwaste = max,
839 max_objwaste = 0, avg_objwaste,
840 total_objwaste = 0;
841
842 /* Memory per object */
843 unsigned long long min_memobj = max,
844 max_memobj = 0, avg_memobj,
845 total_objsize = 0;
846
847 /* Percentage of partial slabs per slab */
848 unsigned long min_ppart = 100, max_ppart = 0,
849 avg_ppart, total_ppart = 0;
850
851 /* Number of objects in partial slabs */
852 unsigned long min_partobj = max, max_partobj = 0,
853 avg_partobj, total_partobj = 0;
854
855 /* Percentage of partial objects of all objects in a slab */
856 unsigned long min_ppartobj = 100, max_ppartobj = 0,
857 avg_ppartobj, total_ppartobj = 0;
858
859
860 for (s = slabinfo; s < slabinfo + slabs; s++) {
861 unsigned long long size;
862 unsigned long used;
863 unsigned long long wasted;
864 unsigned long long objwaste;
865 unsigned long percentage_partial_slabs;
866 unsigned long percentage_partial_objs;
867
868 if (!s->slabs || !s->objects)
869 continue;
870
871 used_slabs++;
872
873 size = slab_size(s);
874 used = s->objects * s->object_size;
875 wasted = size - used;
876 objwaste = s->slab_size - s->object_size;
877
878 percentage_partial_slabs = s->partial * 100 / s->slabs;
879 if (percentage_partial_slabs > 100)
880 percentage_partial_slabs = 100;
881
882 percentage_partial_objs = s->objects_partial * 100
883 / s->objects;
884
885 if (percentage_partial_objs > 100)
886 percentage_partial_objs = 100;
887
888 if (s->object_size < min_objsize)
889 min_objsize = s->object_size;
890 if (s->partial < min_partial)
891 min_partial = s->partial;
892 if (s->slabs < min_slabs)
893 min_slabs = s->slabs;
894 if (size < min_size)
895 min_size = size;
896 if (wasted < min_waste)
897 min_waste = wasted;
898 if (objwaste < min_objwaste)
899 min_objwaste = objwaste;
900 if (s->objects < min_objects)
901 min_objects = s->objects;
902 if (used < min_used)
903 min_used = used;
904 if (s->objects_partial < min_partobj)
905 min_partobj = s->objects_partial;
906 if (percentage_partial_slabs < min_ppart)
907 min_ppart = percentage_partial_slabs;
908 if (percentage_partial_objs < min_ppartobj)
909 min_ppartobj = percentage_partial_objs;
910 if (s->slab_size < min_memobj)
911 min_memobj = s->slab_size;
912
913 if (s->object_size > max_objsize)
914 max_objsize = s->object_size;
915 if (s->partial > max_partial)
916 max_partial = s->partial;
917 if (s->slabs > max_slabs)
918 max_slabs = s->slabs;
919 if (size > max_size)
920 max_size = size;
921 if (wasted > max_waste)
922 max_waste = wasted;
923 if (objwaste > max_objwaste)
924 max_objwaste = objwaste;
925 if (s->objects > max_objects)
926 max_objects = s->objects;
927 if (used > max_used)
928 max_used = used;
929 if (s->objects_partial > max_partobj)
930 max_partobj = s->objects_partial;
931 if (percentage_partial_slabs > max_ppart)
932 max_ppart = percentage_partial_slabs;
933 if (percentage_partial_objs > max_ppartobj)
934 max_ppartobj = percentage_partial_objs;
935 if (s->slab_size > max_memobj)
936 max_memobj = s->slab_size;
937
938 total_partial += s->partial;
939 total_slabs += s->slabs;
940 total_size += size;
941 total_waste += wasted;
942
943 total_objects += s->objects;
944 total_used += used;
945 total_partobj += s->objects_partial;
946 total_ppart += percentage_partial_slabs;
947 total_ppartobj += percentage_partial_objs;
948
949 total_objwaste += s->objects * objwaste;
950 total_objsize += s->objects * s->slab_size;
951 }
952
953 if (!total_objects) {
954 printf("No objects\n");
955 return;
956 }
957 if (!used_slabs) {
958 printf("No slabs\n");
959 return;
960 }
961
962 /* Per slab averages */
963 avg_partial = total_partial / used_slabs;
964 avg_slabs = total_slabs / used_slabs;
965 avg_size = total_size / used_slabs;
966 avg_waste = total_waste / used_slabs;
967
968 avg_objects = total_objects / used_slabs;
969 avg_used = total_used / used_slabs;
970 avg_partobj = total_partobj / used_slabs;
971 avg_ppart = total_ppart / used_slabs;
972 avg_ppartobj = total_ppartobj / used_slabs;
973
974 /* Per object object sizes */
975 avg_objsize = total_used / total_objects;
976 avg_objwaste = total_objwaste / total_objects;
977 avg_partobj = total_partobj * 100 / total_objects;
978 avg_memobj = total_objsize / total_objects;
979
980 printf("Slabcache Totals\n");
981 printf("----------------\n");
982 printf("Slabcaches : %15d Aliases : %11d->%-3d Active: %3d\n",
983 slabs, aliases, alias_targets, used_slabs);
984
985 store_size(b1, total_size);store_size(b2, total_waste);
986 store_size(b3, total_waste * 100 / total_used);
987 printf("Memory used: %15s # Loss : %15s MRatio:%6s%%\n", b1, b2, b3);
988
989 store_size(b1, total_objects);store_size(b2, total_partobj);
990 store_size(b3, total_partobj * 100 / total_objects);
991 printf("# Objects : %15s # PartObj: %15s ORatio:%6s%%\n", b1, b2, b3);
992
993 printf("\n");
994 printf("Per Cache Average "
995 "Min Max Total\n");
996 printf("---------------------------------------"
997 "-------------------------------------\n");
998
999 store_size(b1, avg_objects);store_size(b2, min_objects);
1000 store_size(b3, max_objects);store_size(b4, total_objects);
1001 printf("#Objects %15s %15s %15s %15s\n",
1002 b1, b2, b3, b4);
1003
1004 store_size(b1, avg_slabs);store_size(b2, min_slabs);
1005 store_size(b3, max_slabs);store_size(b4, total_slabs);
1006 printf("#Slabs %15s %15s %15s %15s\n",
1007 b1, b2, b3, b4);
1008
1009 store_size(b1, avg_partial);store_size(b2, min_partial);
1010 store_size(b3, max_partial);store_size(b4, total_partial);
1011 printf("#PartSlab %15s %15s %15s %15s\n",
1012 b1, b2, b3, b4);
1013 store_size(b1, avg_ppart);store_size(b2, min_ppart);
1014 store_size(b3, max_ppart);
1015 store_size(b4, total_partial * 100 / total_slabs);
1016 printf("%%PartSlab%15s%% %15s%% %15s%% %15s%%\n",
1017 b1, b2, b3, b4);
1018
1019 store_size(b1, avg_partobj);store_size(b2, min_partobj);
1020 store_size(b3, max_partobj);
1021 store_size(b4, total_partobj);
1022 printf("PartObjs %15s %15s %15s %15s\n",
1023 b1, b2, b3, b4);
1024
1025 store_size(b1, avg_ppartobj);store_size(b2, min_ppartobj);
1026 store_size(b3, max_ppartobj);
1027 store_size(b4, total_partobj * 100 / total_objects);
1028 printf("%% PartObj%15s%% %15s%% %15s%% %15s%%\n",
1029 b1, b2, b3, b4);
1030
1031 store_size(b1, avg_size);store_size(b2, min_size);
1032 store_size(b3, max_size);store_size(b4, total_size);
1033 printf("Memory %15s %15s %15s %15s\n",
1034 b1, b2, b3, b4);
1035
1036 store_size(b1, avg_used);store_size(b2, min_used);
1037 store_size(b3, max_used);store_size(b4, total_used);
1038 printf("Used %15s %15s %15s %15s\n",
1039 b1, b2, b3, b4);
1040
1041 store_size(b1, avg_waste);store_size(b2, min_waste);
1042 store_size(b3, max_waste);store_size(b4, total_waste);
1043 printf("Loss %15s %15s %15s %15s\n",
1044 b1, b2, b3, b4);
1045
1046 printf("\n");
1047 printf("Per Object Average "
1048 "Min Max\n");
1049 printf("---------------------------------------"
1050 "--------------------\n");
1051
1052 store_size(b1, avg_memobj);store_size(b2, min_memobj);
1053 store_size(b3, max_memobj);
1054 printf("Memory %15s %15s %15s\n",
1055 b1, b2, b3);
1056 store_size(b1, avg_objsize);store_size(b2, min_objsize);
1057 store_size(b3, max_objsize);
1058 printf("User %15s %15s %15s\n",
1059 b1, b2, b3);
1060
1061 store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
1062 store_size(b3, max_objwaste);
1063 printf("Loss %15s %15s %15s\n",
1064 b1, b2, b3);
1065 }
1066
sort_slabs(void)1067 static void sort_slabs(void)
1068 {
1069 struct slabinfo *s1,*s2;
1070
1071 for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
1072 for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
1073 int result;
1074
1075 if (sort_size) {
1076 if (slab_size(s1) == slab_size(s2))
1077 result = strcasecmp(s1->name, s2->name);
1078 else
1079 result = slab_size(s1) < slab_size(s2);
1080 } else if (sort_active) {
1081 if (slab_activity(s1) == slab_activity(s2))
1082 result = strcasecmp(s1->name, s2->name);
1083 else
1084 result = slab_activity(s1) < slab_activity(s2);
1085 } else if (sort_loss) {
1086 if (slab_waste(s1) == slab_waste(s2))
1087 result = strcasecmp(s1->name, s2->name);
1088 else
1089 result = slab_waste(s1) < slab_waste(s2);
1090 } else if (sort_partial) {
1091 if (s1->partial == s2->partial)
1092 result = strcasecmp(s1->name, s2->name);
1093 else
1094 result = s1->partial < s2->partial;
1095 } else
1096 result = strcasecmp(s1->name, s2->name);
1097
1098 if (show_inverted)
1099 result = -result;
1100
1101 if (result > 0) {
1102 struct slabinfo t;
1103
1104 memcpy(&t, s1, sizeof(struct slabinfo));
1105 memcpy(s1, s2, sizeof(struct slabinfo));
1106 memcpy(s2, &t, sizeof(struct slabinfo));
1107 }
1108 }
1109 }
1110 }
1111
sort_aliases(void)1112 static void sort_aliases(void)
1113 {
1114 struct aliasinfo *a1,*a2;
1115
1116 for (a1 = aliasinfo; a1 < aliasinfo + aliases; a1++) {
1117 for (a2 = a1 + 1; a2 < aliasinfo + aliases; a2++) {
1118 char *n1, *n2;
1119
1120 n1 = a1->name;
1121 n2 = a2->name;
1122 if (show_alias && !show_inverted) {
1123 n1 = a1->ref;
1124 n2 = a2->ref;
1125 }
1126 if (strcasecmp(n1, n2) > 0) {
1127 struct aliasinfo t;
1128
1129 memcpy(&t, a1, sizeof(struct aliasinfo));
1130 memcpy(a1, a2, sizeof(struct aliasinfo));
1131 memcpy(a2, &t, sizeof(struct aliasinfo));
1132 }
1133 }
1134 }
1135 }
1136
link_slabs(void)1137 static void link_slabs(void)
1138 {
1139 struct aliasinfo *a;
1140 struct slabinfo *s;
1141
1142 for (a = aliasinfo; a < aliasinfo + aliases; a++) {
1143
1144 for (s = slabinfo; s < slabinfo + slabs; s++)
1145 if (strcmp(a->ref, s->name) == 0) {
1146 a->slab = s;
1147 s->refs++;
1148 break;
1149 }
1150 if (s == slabinfo + slabs)
1151 fatal("Unresolved alias %s\n", a->ref);
1152 }
1153 }
1154
alias(void)1155 static void alias(void)
1156 {
1157 struct aliasinfo *a;
1158 char *active = NULL;
1159
1160 sort_aliases();
1161 link_slabs();
1162
1163 for(a = aliasinfo; a < aliasinfo + aliases; a++) {
1164
1165 if (!show_single_ref && a->slab->refs == 1)
1166 continue;
1167
1168 if (!show_inverted) {
1169 if (active) {
1170 if (strcmp(a->slab->name, active) == 0) {
1171 printf(" %s", a->name);
1172 continue;
1173 }
1174 }
1175 printf("\n%-12s <- %s", a->slab->name, a->name);
1176 active = a->slab->name;
1177 }
1178 else
1179 printf("%-15s -> %s\n", a->name, a->slab->name);
1180 }
1181 if (active)
1182 printf("\n");
1183 }
1184
1185
rename_slabs(void)1186 static void rename_slabs(void)
1187 {
1188 struct slabinfo *s;
1189 struct aliasinfo *a;
1190
1191 for (s = slabinfo; s < slabinfo + slabs; s++) {
1192 if (*s->name != ':')
1193 continue;
1194
1195 if (s->refs > 1 && !show_first_alias)
1196 continue;
1197
1198 a = find_one_alias(s);
1199
1200 if (a)
1201 s->name = a->name;
1202 else {
1203 s->name = "*";
1204 actual_slabs--;
1205 }
1206 }
1207 }
1208
slab_mismatch(char * slab)1209 static int slab_mismatch(char *slab)
1210 {
1211 return regexec(&pattern, slab, 0, NULL, 0);
1212 }
1213
read_slab_dir(void)1214 static void read_slab_dir(void)
1215 {
1216 DIR *dir;
1217 struct dirent *de;
1218 struct slabinfo *slab = slabinfo;
1219 struct aliasinfo *alias = aliasinfo;
1220 char *p;
1221 char *t;
1222 int count;
1223
1224 if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
1225 fatal("SYSFS support for SLUB not active\n");
1226
1227 dir = opendir(".");
1228 while ((de = readdir(dir))) {
1229 if (de->d_name[0] == '.' ||
1230 (de->d_name[0] != ':' && slab_mismatch(de->d_name)))
1231 continue;
1232 switch (de->d_type) {
1233 case DT_LNK:
1234 if (alias - aliasinfo == MAX_ALIASES)
1235 fatal("Too many aliases\n");
1236 alias->name = strdup(de->d_name);
1237 count = readlink(de->d_name, buffer, sizeof(buffer)-1);
1238
1239 if (count < 0)
1240 fatal("Cannot read symlink %s\n", de->d_name);
1241
1242 buffer[count] = 0;
1243 p = buffer + count;
1244 while (p > buffer && p[-1] != '/')
1245 p--;
1246 alias->ref = strdup(p);
1247 alias++;
1248 break;
1249 case DT_DIR:
1250 if (slab - slabinfo == MAX_SLABS)
1251 fatal("Too many slabs\n");
1252 if (chdir(de->d_name))
1253 fatal("Unable to access slab %s\n", slab->name);
1254 slab->name = strdup(de->d_name);
1255 slab->alias = 0;
1256 slab->refs = 0;
1257 slab->aliases = get_obj("aliases");
1258 slab->align = get_obj("align");
1259 slab->cache_dma = get_obj("cache_dma");
1260 slab->cpu_slabs = get_obj("cpu_slabs");
1261 slab->destroy_by_rcu = get_obj("destroy_by_rcu");
1262 slab->hwcache_align = get_obj("hwcache_align");
1263 slab->object_size = get_obj("object_size");
1264 slab->objects = get_obj("objects");
1265 slab->objects_partial = get_obj("objects_partial");
1266 slab->objects_total = get_obj("objects_total");
1267 slab->objs_per_slab = get_obj("objs_per_slab");
1268 slab->order = get_obj("order");
1269 slab->partial = get_obj("partial");
1270 slab->partial = get_obj_and_str("partial", &t);
1271 decode_numa_list(slab->numa_partial, t);
1272 free(t);
1273 slab->poison = get_obj("poison");
1274 slab->reclaim_account = get_obj("reclaim_account");
1275 slab->red_zone = get_obj("red_zone");
1276 slab->sanity_checks = get_obj("sanity_checks");
1277 slab->slab_size = get_obj("slab_size");
1278 slab->slabs = get_obj_and_str("slabs", &t);
1279 decode_numa_list(slab->numa, t);
1280 free(t);
1281 slab->store_user = get_obj("store_user");
1282 slab->trace = get_obj("trace");
1283 slab->alloc_fastpath = get_obj("alloc_fastpath");
1284 slab->alloc_slowpath = get_obj("alloc_slowpath");
1285 slab->free_fastpath = get_obj("free_fastpath");
1286 slab->free_slowpath = get_obj("free_slowpath");
1287 slab->free_frozen= get_obj("free_frozen");
1288 slab->free_add_partial = get_obj("free_add_partial");
1289 slab->free_remove_partial = get_obj("free_remove_partial");
1290 slab->alloc_from_partial = get_obj("alloc_from_partial");
1291 slab->alloc_slab = get_obj("alloc_slab");
1292 slab->alloc_refill = get_obj("alloc_refill");
1293 slab->free_slab = get_obj("free_slab");
1294 slab->cpuslab_flush = get_obj("cpuslab_flush");
1295 slab->deactivate_full = get_obj("deactivate_full");
1296 slab->deactivate_empty = get_obj("deactivate_empty");
1297 slab->deactivate_to_head = get_obj("deactivate_to_head");
1298 slab->deactivate_to_tail = get_obj("deactivate_to_tail");
1299 slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
1300 slab->order_fallback = get_obj("order_fallback");
1301 slab->cmpxchg_double_cpu_fail = get_obj("cmpxchg_double_cpu_fail");
1302 slab->cmpxchg_double_fail = get_obj("cmpxchg_double_fail");
1303 slab->cpu_partial_alloc = get_obj("cpu_partial_alloc");
1304 slab->cpu_partial_free = get_obj("cpu_partial_free");
1305 slab->alloc_node_mismatch = get_obj("alloc_node_mismatch");
1306 slab->deactivate_bypass = get_obj("deactivate_bypass");
1307 if (chdir(".."))
1308 fatal("Unable to chdir from slab ../%s\n",
1309 slab->name);
1310 if (slab->name[0] == ':')
1311 alias_targets++;
1312 slab++;
1313 break;
1314 default :
1315 fatal("Unknown file type %lx\n", de->d_type);
1316 }
1317 }
1318 closedir(dir);
1319 slabs = slab - slabinfo;
1320 actual_slabs = slabs;
1321 aliases = alias - aliasinfo;
1322 }
1323
output_slabs(void)1324 static void output_slabs(void)
1325 {
1326 struct slabinfo *slab;
1327 int lines = output_lines;
1328
1329 for (slab = slabinfo; (slab < slabinfo + slabs) &&
1330 lines != 0; slab++) {
1331
1332 if (slab->alias)
1333 continue;
1334
1335 if (lines != -1)
1336 lines--;
1337
1338 if (show_numa)
1339 slab_numa(slab, 0);
1340 else if (show_track)
1341 show_tracking(slab);
1342 else if (validate)
1343 slab_validate(slab);
1344 else if (shrink)
1345 slab_shrink(slab);
1346 else if (set_debug)
1347 slab_debug(slab);
1348 else if (show_ops)
1349 ops(slab);
1350 else if (show_slab)
1351 slabcache(slab);
1352 else if (show_report)
1353 report(slab);
1354 }
1355 }
1356
_xtotals(char * heading,char * underline,int loss,int size,int partial)1357 static void _xtotals(char *heading, char *underline,
1358 int loss, int size, int partial)
1359 {
1360 printf("%s%s", heading, underline);
1361 line = 0;
1362 sort_loss = loss;
1363 sort_size = size;
1364 sort_partial = partial;
1365 sort_slabs();
1366 output_slabs();
1367 }
1368
xtotals(void)1369 static void xtotals(void)
1370 {
1371 char *heading, *underline;
1372
1373 totals();
1374
1375 link_slabs();
1376 rename_slabs();
1377
1378 heading = "\nSlabs sorted by size\n";
1379 underline = "--------------------\n";
1380 _xtotals(heading, underline, 0, 1, 0);
1381
1382 heading = "\nSlabs sorted by loss\n";
1383 underline = "--------------------\n";
1384 _xtotals(heading, underline, 1, 0, 0);
1385
1386 heading = "\nSlabs sorted by number of partial slabs\n";
1387 underline = "---------------------------------------\n";
1388 _xtotals(heading, underline, 0, 0, 1);
1389
1390 printf("\n");
1391 }
1392
1393 struct option opts[] = {
1394 { "aliases", no_argument, NULL, 'a' },
1395 { "activity", no_argument, NULL, 'A' },
1396 { "Bytes", no_argument, NULL, 'B'},
1397 { "debug", optional_argument, NULL, 'd' },
1398 { "display-activity", no_argument, NULL, 'D' },
1399 { "empty", no_argument, NULL, 'e' },
1400 { "first-alias", no_argument, NULL, 'f' },
1401 { "help", no_argument, NULL, 'h' },
1402 { "inverted", no_argument, NULL, 'i'},
1403 { "slabs", no_argument, NULL, 'l' },
1404 { "Loss", no_argument, NULL, 'L'},
1405 { "numa", no_argument, NULL, 'n' },
1406 { "lines", required_argument, NULL, 'N'},
1407 { "ops", no_argument, NULL, 'o' },
1408 { "partial", no_argument, NULL, 'p'},
1409 { "report", no_argument, NULL, 'r' },
1410 { "shrink", no_argument, NULL, 's' },
1411 { "Size", no_argument, NULL, 'S'},
1412 { "tracking", no_argument, NULL, 't'},
1413 { "Totals", no_argument, NULL, 'T'},
1414 { "Unreclaim", no_argument, NULL, 'U'},
1415 { "validate", no_argument, NULL, 'v' },
1416 { "Xtotals", no_argument, NULL, 'X'},
1417 { "zero", no_argument, NULL, 'z' },
1418 { "1ref", no_argument, NULL, '1'},
1419 { NULL, 0, NULL, 0 }
1420 };
1421
main(int argc,char * argv[])1422 int main(int argc, char *argv[])
1423 {
1424 int c;
1425 int err;
1426 char *pattern_source;
1427
1428 page_size = getpagesize();
1429
1430 while ((c = getopt_long(argc, argv, "aABd::DefhilLnN:oPrsStTUvXz1",
1431 opts, NULL)) != -1)
1432 switch (c) {
1433 case 'a':
1434 show_alias = 1;
1435 break;
1436 case 'A':
1437 sort_active = 1;
1438 break;
1439 case 'B':
1440 show_bytes = 1;
1441 break;
1442 case 'd':
1443 set_debug = 1;
1444 if (!debug_opt_scan(optarg))
1445 fatal("Invalid debug option '%s'\n", optarg);
1446 break;
1447 case 'D':
1448 show_activity = 1;
1449 break;
1450 case 'e':
1451 show_empty = 1;
1452 break;
1453 case 'f':
1454 show_first_alias = 1;
1455 break;
1456 case 'h':
1457 usage();
1458 return 0;
1459 case 'i':
1460 show_inverted = 1;
1461 break;
1462 case 'l':
1463 show_slab = 1;
1464 break;
1465 case 'L':
1466 sort_loss = 1;
1467 break;
1468 case 'n':
1469 show_numa = 1;
1470 break;
1471 case 'N':
1472 if (optarg) {
1473 output_lines = atoi(optarg);
1474 if (output_lines < 1)
1475 output_lines = 1;
1476 }
1477 break;
1478 case 'o':
1479 show_ops = 1;
1480 break;
1481 case 'r':
1482 show_report = 1;
1483 break;
1484 case 'P':
1485 sort_partial = 1;
1486 break;
1487 case 's':
1488 shrink = 1;
1489 break;
1490 case 'S':
1491 sort_size = 1;
1492 break;
1493 case 't':
1494 show_track = 1;
1495 break;
1496 case 'T':
1497 show_totals = 1;
1498 break;
1499 case 'U':
1500 unreclaim_only = 1;
1501 break;
1502 case 'v':
1503 validate = 1;
1504 break;
1505 case 'X':
1506 if (output_lines == -1)
1507 output_lines = 1;
1508 extended_totals = 1;
1509 show_bytes = 1;
1510 break;
1511 case 'z':
1512 skip_zero = 0;
1513 break;
1514 case '1':
1515 show_single_ref = 1;
1516 break;
1517 default:
1518 fatal("%s: Invalid option '%c'\n", argv[0], optopt);
1519
1520 }
1521
1522 if (!show_slab && !show_alias && !show_track && !show_report
1523 && !validate && !shrink && !set_debug && !show_ops)
1524 show_slab = 1;
1525
1526 if (argc > optind)
1527 pattern_source = argv[optind];
1528 else
1529 pattern_source = ".*";
1530
1531 err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
1532 if (err)
1533 fatal("%s: Invalid pattern '%s' code %d\n",
1534 argv[0], pattern_source, err);
1535 read_slab_dir();
1536 if (show_alias) {
1537 alias();
1538 } else if (extended_totals) {
1539 xtotals();
1540 } else if (show_totals) {
1541 totals();
1542 } else {
1543 link_slabs();
1544 rename_slabs();
1545 sort_slabs();
1546 output_slabs();
1547 }
1548 return 0;
1549 }
1550