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 500
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 show_activity;
83 int output_lines = -1;
84 int sort_loss;
85 int extended_totals;
86 int show_bytes;
87
88 /* Debug options */
89 int sanity;
90 int redzone;
91 int poison;
92 int tracking;
93 int tracing;
94
95 int page_size;
96
97 regex_t pattern;
98
fatal(const char * x,...)99 static void fatal(const char *x, ...)
100 {
101 va_list ap;
102
103 va_start(ap, x);
104 vfprintf(stderr, x, ap);
105 va_end(ap);
106 exit(EXIT_FAILURE);
107 }
108
usage(void)109 static void usage(void)
110 {
111 printf("slabinfo 4/15/2011. (c) 2007 sgi/(c) 2011 Linux Foundation.\n\n"
112 "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
113 "-a|--aliases Show aliases\n"
114 "-A|--activity Most active slabs first\n"
115 "-d<options>|--debug=<options> Set/Clear Debug options\n"
116 "-D|--display-active Switch line format to activity\n"
117 "-e|--empty Show empty slabs\n"
118 "-f|--first-alias Show first alias\n"
119 "-h|--help Show usage information\n"
120 "-i|--inverted Inverted list\n"
121 "-l|--slabs Show slabs\n"
122 "-n|--numa Show NUMA information\n"
123 "-o|--ops Show kmem_cache_ops\n"
124 "-s|--shrink Shrink slabs\n"
125 "-r|--report Detailed report on single slabs\n"
126 "-S|--Size Sort by size\n"
127 "-t|--tracking Show alloc/free information\n"
128 "-T|--Totals Show summary information\n"
129 "-v|--validate Validate slabs\n"
130 "-z|--zero Include empty slabs\n"
131 "-1|--1ref Single reference\n"
132 "-N|--lines=K Show the first K slabs\n"
133 "-L|--Loss Sort by loss\n"
134 "-X|--Xtotals Show extended summary information\n"
135 "-B|--Bytes Show size in bytes\n"
136 "\nValid debug options (FZPUT may be combined)\n"
137 "a / A Switch on all debug options (=FZUP)\n"
138 "- Switch off all debug options\n"
139 "f / F Sanity Checks (SLAB_CONSISTENCY_CHECKS)\n"
140 "z / Z Redzoning\n"
141 "p / P Poisoning\n"
142 "u / U Tracking\n"
143 "t / T Tracing\n"
144 );
145 }
146
read_obj(const char * name)147 static unsigned long read_obj(const char *name)
148 {
149 FILE *f = fopen(name, "r");
150
151 if (!f)
152 buffer[0] = 0;
153 else {
154 if (!fgets(buffer, sizeof(buffer), f))
155 buffer[0] = 0;
156 fclose(f);
157 if (buffer[strlen(buffer)] == '\n')
158 buffer[strlen(buffer)] = 0;
159 }
160 return strlen(buffer);
161 }
162
163
164 /*
165 * Get the contents of an attribute
166 */
get_obj(const char * name)167 static unsigned long get_obj(const char *name)
168 {
169 if (!read_obj(name))
170 return 0;
171
172 return atol(buffer);
173 }
174
get_obj_and_str(const char * name,char ** x)175 static unsigned long get_obj_and_str(const char *name, char **x)
176 {
177 unsigned long result = 0;
178 char *p;
179
180 *x = NULL;
181
182 if (!read_obj(name)) {
183 x = NULL;
184 return 0;
185 }
186 result = strtoul(buffer, &p, 10);
187 while (*p == ' ')
188 p++;
189 if (*p)
190 *x = strdup(p);
191 return result;
192 }
193
set_obj(struct slabinfo * s,const char * name,int n)194 static void set_obj(struct slabinfo *s, const char *name, int n)
195 {
196 char x[100];
197 FILE *f;
198
199 snprintf(x, 100, "%s/%s", s->name, name);
200 f = fopen(x, "w");
201 if (!f)
202 fatal("Cannot write to %s\n", x);
203
204 fprintf(f, "%d\n", n);
205 fclose(f);
206 }
207
read_slab_obj(struct slabinfo * s,const char * name)208 static unsigned long read_slab_obj(struct slabinfo *s, const char *name)
209 {
210 char x[100];
211 FILE *f;
212 size_t l;
213
214 snprintf(x, 100, "%s/%s", s->name, name);
215 f = fopen(x, "r");
216 if (!f) {
217 buffer[0] = 0;
218 l = 0;
219 } else {
220 l = fread(buffer, 1, sizeof(buffer), f);
221 buffer[l] = 0;
222 fclose(f);
223 }
224 return l;
225 }
226
227
228 /*
229 * Put a size string together
230 */
store_size(char * buffer,unsigned long value)231 static int store_size(char *buffer, unsigned long value)
232 {
233 unsigned long divisor = 1;
234 char trailer = 0;
235 int n;
236
237 if (!show_bytes) {
238 if (value > 1000000000UL) {
239 divisor = 100000000UL;
240 trailer = 'G';
241 } else if (value > 1000000UL) {
242 divisor = 100000UL;
243 trailer = 'M';
244 } else if (value > 1000UL) {
245 divisor = 100;
246 trailer = 'K';
247 }
248 }
249
250 value /= divisor;
251 n = sprintf(buffer, "%ld",value);
252 if (trailer) {
253 buffer[n] = trailer;
254 n++;
255 buffer[n] = 0;
256 }
257 if (divisor != 1) {
258 memmove(buffer + n - 2, buffer + n - 3, 4);
259 buffer[n-2] = '.';
260 n++;
261 }
262 return n;
263 }
264
decode_numa_list(int * numa,char * t)265 static void decode_numa_list(int *numa, char *t)
266 {
267 int node;
268 int nr;
269
270 memset(numa, 0, MAX_NODES * sizeof(int));
271
272 if (!t)
273 return;
274
275 while (*t == 'N') {
276 t++;
277 node = strtoul(t, &t, 10);
278 if (*t == '=') {
279 t++;
280 nr = strtoul(t, &t, 10);
281 numa[node] = nr;
282 if (node > highest_node)
283 highest_node = node;
284 }
285 while (*t == ' ')
286 t++;
287 }
288 }
289
slab_validate(struct slabinfo * s)290 static void slab_validate(struct slabinfo *s)
291 {
292 if (strcmp(s->name, "*") == 0)
293 return;
294
295 set_obj(s, "validate", 1);
296 }
297
slab_shrink(struct slabinfo * s)298 static void slab_shrink(struct slabinfo *s)
299 {
300 if (strcmp(s->name, "*") == 0)
301 return;
302
303 set_obj(s, "shrink", 1);
304 }
305
306 int line = 0;
307
first_line(void)308 static void first_line(void)
309 {
310 if (show_activity)
311 printf("Name Objects Alloc Free"
312 " %%Fast Fallb O CmpX UL\n");
313 else
314 printf("Name Objects Objsize %s "
315 "Slabs/Part/Cpu O/S O %%Fr %%Ef Flg\n",
316 sort_loss ? " Loss" : "Space");
317 }
318
319 /*
320 * Find the shortest alias of a slab
321 */
find_one_alias(struct slabinfo * find)322 static struct aliasinfo *find_one_alias(struct slabinfo *find)
323 {
324 struct aliasinfo *a;
325 struct aliasinfo *best = NULL;
326
327 for(a = aliasinfo;a < aliasinfo + aliases; a++) {
328 if (a->slab == find &&
329 (!best || strlen(best->name) < strlen(a->name))) {
330 best = a;
331 if (strncmp(a->name,"kmall", 5) == 0)
332 return best;
333 }
334 }
335 return best;
336 }
337
slab_size(struct slabinfo * s)338 static unsigned long slab_size(struct slabinfo *s)
339 {
340 return s->slabs * (page_size << s->order);
341 }
342
slab_activity(struct slabinfo * s)343 static unsigned long slab_activity(struct slabinfo *s)
344 {
345 return s->alloc_fastpath + s->free_fastpath +
346 s->alloc_slowpath + s->free_slowpath;
347 }
348
slab_waste(struct slabinfo * s)349 static unsigned long slab_waste(struct slabinfo *s)
350 {
351 return slab_size(s) - s->objects * s->object_size;
352 }
353
slab_numa(struct slabinfo * s,int mode)354 static void slab_numa(struct slabinfo *s, int mode)
355 {
356 int node;
357
358 if (strcmp(s->name, "*") == 0)
359 return;
360
361 if (!highest_node) {
362 printf("\n%s: No NUMA information available.\n", s->name);
363 return;
364 }
365
366 if (skip_zero && !s->slabs)
367 return;
368
369 if (!line) {
370 printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
371 for(node = 0; node <= highest_node; node++)
372 printf(" %4d", node);
373 printf("\n----------------------");
374 for(node = 0; node <= highest_node; node++)
375 printf("-----");
376 printf("\n");
377 }
378 printf("%-21s ", mode ? "All slabs" : s->name);
379 for(node = 0; node <= highest_node; node++) {
380 char b[20];
381
382 store_size(b, s->numa[node]);
383 printf(" %4s", b);
384 }
385 printf("\n");
386 if (mode) {
387 printf("%-21s ", "Partial slabs");
388 for(node = 0; node <= highest_node; node++) {
389 char b[20];
390
391 store_size(b, s->numa_partial[node]);
392 printf(" %4s", b);
393 }
394 printf("\n");
395 }
396 line++;
397 }
398
show_tracking(struct slabinfo * s)399 static void show_tracking(struct slabinfo *s)
400 {
401 printf("\n%s: Kernel object allocation\n", s->name);
402 printf("-----------------------------------------------------------------------\n");
403 if (read_slab_obj(s, "alloc_calls"))
404 printf("%s", buffer);
405 else
406 printf("No Data\n");
407
408 printf("\n%s: Kernel object freeing\n", s->name);
409 printf("------------------------------------------------------------------------\n");
410 if (read_slab_obj(s, "free_calls"))
411 printf("%s", buffer);
412 else
413 printf("No Data\n");
414
415 }
416
ops(struct slabinfo * s)417 static void ops(struct slabinfo *s)
418 {
419 if (strcmp(s->name, "*") == 0)
420 return;
421
422 if (read_slab_obj(s, "ops")) {
423 printf("\n%s: kmem_cache operations\n", s->name);
424 printf("--------------------------------------------\n");
425 printf("%s", buffer);
426 } else
427 printf("\n%s has no kmem_cache operations\n", s->name);
428 }
429
onoff(int x)430 static const char *onoff(int x)
431 {
432 if (x)
433 return "On ";
434 return "Off";
435 }
436
slab_stats(struct slabinfo * s)437 static void slab_stats(struct slabinfo *s)
438 {
439 unsigned long total_alloc;
440 unsigned long total_free;
441 unsigned long total;
442
443 if (!s->alloc_slab)
444 return;
445
446 total_alloc = s->alloc_fastpath + s->alloc_slowpath;
447 total_free = s->free_fastpath + s->free_slowpath;
448
449 if (!total_alloc)
450 return;
451
452 printf("\n");
453 printf("Slab Perf Counter Alloc Free %%Al %%Fr\n");
454 printf("--------------------------------------------------\n");
455 printf("Fastpath %8lu %8lu %3lu %3lu\n",
456 s->alloc_fastpath, s->free_fastpath,
457 s->alloc_fastpath * 100 / total_alloc,
458 total_free ? s->free_fastpath * 100 / total_free : 0);
459 printf("Slowpath %8lu %8lu %3lu %3lu\n",
460 total_alloc - s->alloc_fastpath, s->free_slowpath,
461 (total_alloc - s->alloc_fastpath) * 100 / total_alloc,
462 total_free ? s->free_slowpath * 100 / total_free : 0);
463 printf("Page Alloc %8lu %8lu %3lu %3lu\n",
464 s->alloc_slab, s->free_slab,
465 s->alloc_slab * 100 / total_alloc,
466 total_free ? s->free_slab * 100 / total_free : 0);
467 printf("Add partial %8lu %8lu %3lu %3lu\n",
468 s->deactivate_to_head + s->deactivate_to_tail,
469 s->free_add_partial,
470 (s->deactivate_to_head + s->deactivate_to_tail) * 100 / total_alloc,
471 total_free ? s->free_add_partial * 100 / total_free : 0);
472 printf("Remove partial %8lu %8lu %3lu %3lu\n",
473 s->alloc_from_partial, s->free_remove_partial,
474 s->alloc_from_partial * 100 / total_alloc,
475 total_free ? s->free_remove_partial * 100 / total_free : 0);
476
477 printf("Cpu partial list %8lu %8lu %3lu %3lu\n",
478 s->cpu_partial_alloc, s->cpu_partial_free,
479 s->cpu_partial_alloc * 100 / total_alloc,
480 total_free ? s->cpu_partial_free * 100 / total_free : 0);
481
482 printf("RemoteObj/SlabFrozen %8lu %8lu %3lu %3lu\n",
483 s->deactivate_remote_frees, s->free_frozen,
484 s->deactivate_remote_frees * 100 / total_alloc,
485 total_free ? s->free_frozen * 100 / total_free : 0);
486
487 printf("Total %8lu %8lu\n\n", total_alloc, total_free);
488
489 if (s->cpuslab_flush)
490 printf("Flushes %8lu\n", s->cpuslab_flush);
491
492 total = s->deactivate_full + s->deactivate_empty +
493 s->deactivate_to_head + s->deactivate_to_tail + s->deactivate_bypass;
494
495 if (total) {
496 printf("\nSlab Deactivation Occurrences %%\n");
497 printf("-------------------------------------------------\n");
498 printf("Slab full %7lu %3lu%%\n",
499 s->deactivate_full, (s->deactivate_full * 100) / total);
500 printf("Slab empty %7lu %3lu%%\n",
501 s->deactivate_empty, (s->deactivate_empty * 100) / total);
502 printf("Moved to head of partial list %7lu %3lu%%\n",
503 s->deactivate_to_head, (s->deactivate_to_head * 100) / total);
504 printf("Moved to tail of partial list %7lu %3lu%%\n",
505 s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total);
506 printf("Deactivation bypass %7lu %3lu%%\n",
507 s->deactivate_bypass, (s->deactivate_bypass * 100) / total);
508 printf("Refilled from foreign frees %7lu %3lu%%\n",
509 s->alloc_refill, (s->alloc_refill * 100) / total);
510 printf("Node mismatch %7lu %3lu%%\n",
511 s->alloc_node_mismatch, (s->alloc_node_mismatch * 100) / total);
512 }
513
514 if (s->cmpxchg_double_fail || s->cmpxchg_double_cpu_fail) {
515 printf("\nCmpxchg_double Looping\n------------------------\n");
516 printf("Locked Cmpxchg Double redos %lu\nUnlocked Cmpxchg Double redos %lu\n",
517 s->cmpxchg_double_fail, s->cmpxchg_double_cpu_fail);
518 }
519 }
520
report(struct slabinfo * s)521 static void report(struct slabinfo *s)
522 {
523 if (strcmp(s->name, "*") == 0)
524 return;
525
526 printf("\nSlabcache: %-15s Aliases: %2d Order : %2d Objects: %lu\n",
527 s->name, s->aliases, s->order, s->objects);
528 if (s->hwcache_align)
529 printf("** Hardware cacheline aligned\n");
530 if (s->cache_dma)
531 printf("** Memory is allocated in a special DMA zone\n");
532 if (s->destroy_by_rcu)
533 printf("** Slabs are destroyed via RCU\n");
534 if (s->reclaim_account)
535 printf("** Reclaim accounting active\n");
536
537 printf("\nSizes (bytes) Slabs Debug Memory\n");
538 printf("------------------------------------------------------------------------\n");
539 printf("Object : %7d Total : %7ld Sanity Checks : %s Total: %7ld\n",
540 s->object_size, s->slabs, onoff(s->sanity_checks),
541 s->slabs * (page_size << s->order));
542 printf("SlabObj: %7d Full : %7ld Redzoning : %s Used : %7ld\n",
543 s->slab_size, s->slabs - s->partial - s->cpu_slabs,
544 onoff(s->red_zone), s->objects * s->object_size);
545 printf("SlabSiz: %7d Partial: %7ld Poisoning : %s Loss : %7ld\n",
546 page_size << s->order, s->partial, onoff(s->poison),
547 s->slabs * (page_size << s->order) - s->objects * s->object_size);
548 printf("Loss : %7d CpuSlab: %7d Tracking : %s Lalig: %7ld\n",
549 s->slab_size - s->object_size, s->cpu_slabs, onoff(s->store_user),
550 (s->slab_size - s->object_size) * s->objects);
551 printf("Align : %7d Objects: %7d Tracing : %s Lpadd: %7ld\n",
552 s->align, s->objs_per_slab, onoff(s->trace),
553 ((page_size << s->order) - s->objs_per_slab * s->slab_size) *
554 s->slabs);
555
556 ops(s);
557 show_tracking(s);
558 slab_numa(s, 1);
559 slab_stats(s);
560 }
561
slabcache(struct slabinfo * s)562 static void slabcache(struct slabinfo *s)
563 {
564 char size_str[20];
565 char dist_str[40];
566 char flags[20];
567 char *p = flags;
568
569 if (strcmp(s->name, "*") == 0)
570 return;
571
572 if (actual_slabs == 1) {
573 report(s);
574 return;
575 }
576
577 if (skip_zero && !show_empty && !s->slabs)
578 return;
579
580 if (show_empty && s->slabs)
581 return;
582
583 if (sort_loss == 0)
584 store_size(size_str, slab_size(s));
585 else
586 store_size(size_str, slab_waste(s));
587 snprintf(dist_str, 40, "%lu/%lu/%d", s->slabs - s->cpu_slabs,
588 s->partial, s->cpu_slabs);
589
590 if (!line++)
591 first_line();
592
593 if (s->aliases)
594 *p++ = '*';
595 if (s->cache_dma)
596 *p++ = 'd';
597 if (s->hwcache_align)
598 *p++ = 'A';
599 if (s->poison)
600 *p++ = 'P';
601 if (s->reclaim_account)
602 *p++ = 'a';
603 if (s->red_zone)
604 *p++ = 'Z';
605 if (s->sanity_checks)
606 *p++ = 'F';
607 if (s->store_user)
608 *p++ = 'U';
609 if (s->trace)
610 *p++ = 'T';
611
612 *p = 0;
613 if (show_activity) {
614 unsigned long total_alloc;
615 unsigned long total_free;
616
617 total_alloc = s->alloc_fastpath + s->alloc_slowpath;
618 total_free = s->free_fastpath + s->free_slowpath;
619
620 printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d %4ld %4ld\n",
621 s->name, s->objects,
622 total_alloc, total_free,
623 total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,
624 total_free ? (s->free_fastpath * 100 / total_free) : 0,
625 s->order_fallback, s->order, s->cmpxchg_double_fail,
626 s->cmpxchg_double_cpu_fail);
627 } else {
628 printf("%-21s %8ld %7d %15s %14s %4d %1d %3ld %3ld %s\n",
629 s->name, s->objects, s->object_size, size_str, dist_str,
630 s->objs_per_slab, s->order,
631 s->slabs ? (s->partial * 100) / s->slabs : 100,
632 s->slabs ? (s->objects * s->object_size * 100) /
633 (s->slabs * (page_size << s->order)) : 100,
634 flags);
635 }
636 }
637
638 /*
639 * Analyze debug options. Return false if something is amiss.
640 */
debug_opt_scan(char * opt)641 static int debug_opt_scan(char *opt)
642 {
643 if (!opt || !opt[0] || strcmp(opt, "-") == 0)
644 return 1;
645
646 if (strcasecmp(opt, "a") == 0) {
647 sanity = 1;
648 poison = 1;
649 redzone = 1;
650 tracking = 1;
651 return 1;
652 }
653
654 for ( ; *opt; opt++)
655 switch (*opt) {
656 case 'F' : case 'f':
657 if (sanity)
658 return 0;
659 sanity = 1;
660 break;
661 case 'P' : case 'p':
662 if (poison)
663 return 0;
664 poison = 1;
665 break;
666
667 case 'Z' : case 'z':
668 if (redzone)
669 return 0;
670 redzone = 1;
671 break;
672
673 case 'U' : case 'u':
674 if (tracking)
675 return 0;
676 tracking = 1;
677 break;
678
679 case 'T' : case 't':
680 if (tracing)
681 return 0;
682 tracing = 1;
683 break;
684 default:
685 return 0;
686 }
687 return 1;
688 }
689
slab_empty(struct slabinfo * s)690 static int slab_empty(struct slabinfo *s)
691 {
692 if (s->objects > 0)
693 return 0;
694
695 /*
696 * We may still have slabs even if there are no objects. Shrinking will
697 * remove them.
698 */
699 if (s->slabs != 0)
700 set_obj(s, "shrink", 1);
701
702 return 1;
703 }
704
slab_debug(struct slabinfo * s)705 static void slab_debug(struct slabinfo *s)
706 {
707 if (strcmp(s->name, "*") == 0)
708 return;
709
710 if (sanity && !s->sanity_checks) {
711 set_obj(s, "sanity", 1);
712 }
713 if (!sanity && s->sanity_checks) {
714 if (slab_empty(s))
715 set_obj(s, "sanity", 0);
716 else
717 fprintf(stderr, "%s not empty cannot disable sanity checks\n", s->name);
718 }
719 if (redzone && !s->red_zone) {
720 if (slab_empty(s))
721 set_obj(s, "red_zone", 1);
722 else
723 fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
724 }
725 if (!redzone && s->red_zone) {
726 if (slab_empty(s))
727 set_obj(s, "red_zone", 0);
728 else
729 fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
730 }
731 if (poison && !s->poison) {
732 if (slab_empty(s))
733 set_obj(s, "poison", 1);
734 else
735 fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
736 }
737 if (!poison && s->poison) {
738 if (slab_empty(s))
739 set_obj(s, "poison", 0);
740 else
741 fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
742 }
743 if (tracking && !s->store_user) {
744 if (slab_empty(s))
745 set_obj(s, "store_user", 1);
746 else
747 fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
748 }
749 if (!tracking && s->store_user) {
750 if (slab_empty(s))
751 set_obj(s, "store_user", 0);
752 else
753 fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
754 }
755 if (tracing && !s->trace) {
756 if (slabs == 1)
757 set_obj(s, "trace", 1);
758 else
759 fprintf(stderr, "%s can only enable trace for one slab at a time\n", s->name);
760 }
761 if (!tracing && s->trace)
762 set_obj(s, "trace", 1);
763 }
764
totals(void)765 static void totals(void)
766 {
767 struct slabinfo *s;
768
769 int used_slabs = 0;
770 char b1[20], b2[20], b3[20], b4[20];
771 unsigned long long max = 1ULL << 63;
772
773 /* Object size */
774 unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
775
776 /* Number of partial slabs in a slabcache */
777 unsigned long long min_partial = max, max_partial = 0,
778 avg_partial, total_partial = 0;
779
780 /* Number of slabs in a slab cache */
781 unsigned long long min_slabs = max, max_slabs = 0,
782 avg_slabs, total_slabs = 0;
783
784 /* Size of the whole slab */
785 unsigned long long min_size = max, max_size = 0,
786 avg_size, total_size = 0;
787
788 /* Bytes used for object storage in a slab */
789 unsigned long long min_used = max, max_used = 0,
790 avg_used, total_used = 0;
791
792 /* Waste: Bytes used for alignment and padding */
793 unsigned long long min_waste = max, max_waste = 0,
794 avg_waste, total_waste = 0;
795 /* Number of objects in a slab */
796 unsigned long long min_objects = max, max_objects = 0,
797 avg_objects, total_objects = 0;
798 /* Waste per object */
799 unsigned long long min_objwaste = max,
800 max_objwaste = 0, avg_objwaste,
801 total_objwaste = 0;
802
803 /* Memory per object */
804 unsigned long long min_memobj = max,
805 max_memobj = 0, avg_memobj,
806 total_objsize = 0;
807
808 /* Percentage of partial slabs per slab */
809 unsigned long min_ppart = 100, max_ppart = 0,
810 avg_ppart, total_ppart = 0;
811
812 /* Number of objects in partial slabs */
813 unsigned long min_partobj = max, max_partobj = 0,
814 avg_partobj, total_partobj = 0;
815
816 /* Percentage of partial objects of all objects in a slab */
817 unsigned long min_ppartobj = 100, max_ppartobj = 0,
818 avg_ppartobj, total_ppartobj = 0;
819
820
821 for (s = slabinfo; s < slabinfo + slabs; s++) {
822 unsigned long long size;
823 unsigned long used;
824 unsigned long long wasted;
825 unsigned long long objwaste;
826 unsigned long percentage_partial_slabs;
827 unsigned long percentage_partial_objs;
828
829 if (!s->slabs || !s->objects)
830 continue;
831
832 used_slabs++;
833
834 size = slab_size(s);
835 used = s->objects * s->object_size;
836 wasted = size - used;
837 objwaste = s->slab_size - s->object_size;
838
839 percentage_partial_slabs = s->partial * 100 / s->slabs;
840 if (percentage_partial_slabs > 100)
841 percentage_partial_slabs = 100;
842
843 percentage_partial_objs = s->objects_partial * 100
844 / s->objects;
845
846 if (percentage_partial_objs > 100)
847 percentage_partial_objs = 100;
848
849 if (s->object_size < min_objsize)
850 min_objsize = s->object_size;
851 if (s->partial < min_partial)
852 min_partial = s->partial;
853 if (s->slabs < min_slabs)
854 min_slabs = s->slabs;
855 if (size < min_size)
856 min_size = size;
857 if (wasted < min_waste)
858 min_waste = wasted;
859 if (objwaste < min_objwaste)
860 min_objwaste = objwaste;
861 if (s->objects < min_objects)
862 min_objects = s->objects;
863 if (used < min_used)
864 min_used = used;
865 if (s->objects_partial < min_partobj)
866 min_partobj = s->objects_partial;
867 if (percentage_partial_slabs < min_ppart)
868 min_ppart = percentage_partial_slabs;
869 if (percentage_partial_objs < min_ppartobj)
870 min_ppartobj = percentage_partial_objs;
871 if (s->slab_size < min_memobj)
872 min_memobj = s->slab_size;
873
874 if (s->object_size > max_objsize)
875 max_objsize = s->object_size;
876 if (s->partial > max_partial)
877 max_partial = s->partial;
878 if (s->slabs > max_slabs)
879 max_slabs = s->slabs;
880 if (size > max_size)
881 max_size = size;
882 if (wasted > max_waste)
883 max_waste = wasted;
884 if (objwaste > max_objwaste)
885 max_objwaste = objwaste;
886 if (s->objects > max_objects)
887 max_objects = s->objects;
888 if (used > max_used)
889 max_used = used;
890 if (s->objects_partial > max_partobj)
891 max_partobj = s->objects_partial;
892 if (percentage_partial_slabs > max_ppart)
893 max_ppart = percentage_partial_slabs;
894 if (percentage_partial_objs > max_ppartobj)
895 max_ppartobj = percentage_partial_objs;
896 if (s->slab_size > max_memobj)
897 max_memobj = s->slab_size;
898
899 total_partial += s->partial;
900 total_slabs += s->slabs;
901 total_size += size;
902 total_waste += wasted;
903
904 total_objects += s->objects;
905 total_used += used;
906 total_partobj += s->objects_partial;
907 total_ppart += percentage_partial_slabs;
908 total_ppartobj += percentage_partial_objs;
909
910 total_objwaste += s->objects * objwaste;
911 total_objsize += s->objects * s->slab_size;
912 }
913
914 if (!total_objects) {
915 printf("No objects\n");
916 return;
917 }
918 if (!used_slabs) {
919 printf("No slabs\n");
920 return;
921 }
922
923 /* Per slab averages */
924 avg_partial = total_partial / used_slabs;
925 avg_slabs = total_slabs / used_slabs;
926 avg_size = total_size / used_slabs;
927 avg_waste = total_waste / used_slabs;
928
929 avg_objects = total_objects / used_slabs;
930 avg_used = total_used / used_slabs;
931 avg_partobj = total_partobj / used_slabs;
932 avg_ppart = total_ppart / used_slabs;
933 avg_ppartobj = total_ppartobj / used_slabs;
934
935 /* Per object object sizes */
936 avg_objsize = total_used / total_objects;
937 avg_objwaste = total_objwaste / total_objects;
938 avg_partobj = total_partobj * 100 / total_objects;
939 avg_memobj = total_objsize / total_objects;
940
941 printf("Slabcache Totals\n");
942 printf("----------------\n");
943 printf("Slabcaches : %15d Aliases : %11d->%-3d Active: %3d\n",
944 slabs, aliases, alias_targets, used_slabs);
945
946 store_size(b1, total_size);store_size(b2, total_waste);
947 store_size(b3, total_waste * 100 / total_used);
948 printf("Memory used: %15s # Loss : %15s MRatio:%6s%%\n", b1, b2, b3);
949
950 store_size(b1, total_objects);store_size(b2, total_partobj);
951 store_size(b3, total_partobj * 100 / total_objects);
952 printf("# Objects : %15s # PartObj: %15s ORatio:%6s%%\n", b1, b2, b3);
953
954 printf("\n");
955 printf("Per Cache Average "
956 "Min Max Total\n");
957 printf("---------------------------------------"
958 "-------------------------------------\n");
959
960 store_size(b1, avg_objects);store_size(b2, min_objects);
961 store_size(b3, max_objects);store_size(b4, total_objects);
962 printf("#Objects %15s %15s %15s %15s\n",
963 b1, b2, b3, b4);
964
965 store_size(b1, avg_slabs);store_size(b2, min_slabs);
966 store_size(b3, max_slabs);store_size(b4, total_slabs);
967 printf("#Slabs %15s %15s %15s %15s\n",
968 b1, b2, b3, b4);
969
970 store_size(b1, avg_partial);store_size(b2, min_partial);
971 store_size(b3, max_partial);store_size(b4, total_partial);
972 printf("#PartSlab %15s %15s %15s %15s\n",
973 b1, b2, b3, b4);
974 store_size(b1, avg_ppart);store_size(b2, min_ppart);
975 store_size(b3, max_ppart);
976 store_size(b4, total_partial * 100 / total_slabs);
977 printf("%%PartSlab%15s%% %15s%% %15s%% %15s%%\n",
978 b1, b2, b3, b4);
979
980 store_size(b1, avg_partobj);store_size(b2, min_partobj);
981 store_size(b3, max_partobj);
982 store_size(b4, total_partobj);
983 printf("PartObjs %15s %15s %15s %15s\n",
984 b1, b2, b3, b4);
985
986 store_size(b1, avg_ppartobj);store_size(b2, min_ppartobj);
987 store_size(b3, max_ppartobj);
988 store_size(b4, total_partobj * 100 / total_objects);
989 printf("%% PartObj%15s%% %15s%% %15s%% %15s%%\n",
990 b1, b2, b3, b4);
991
992 store_size(b1, avg_size);store_size(b2, min_size);
993 store_size(b3, max_size);store_size(b4, total_size);
994 printf("Memory %15s %15s %15s %15s\n",
995 b1, b2, b3, b4);
996
997 store_size(b1, avg_used);store_size(b2, min_used);
998 store_size(b3, max_used);store_size(b4, total_used);
999 printf("Used %15s %15s %15s %15s\n",
1000 b1, b2, b3, b4);
1001
1002 store_size(b1, avg_waste);store_size(b2, min_waste);
1003 store_size(b3, max_waste);store_size(b4, total_waste);
1004 printf("Loss %15s %15s %15s %15s\n",
1005 b1, b2, b3, b4);
1006
1007 printf("\n");
1008 printf("Per Object Average "
1009 "Min Max\n");
1010 printf("---------------------------------------"
1011 "--------------------\n");
1012
1013 store_size(b1, avg_memobj);store_size(b2, min_memobj);
1014 store_size(b3, max_memobj);
1015 printf("Memory %15s %15s %15s\n",
1016 b1, b2, b3);
1017 store_size(b1, avg_objsize);store_size(b2, min_objsize);
1018 store_size(b3, max_objsize);
1019 printf("User %15s %15s %15s\n",
1020 b1, b2, b3);
1021
1022 store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
1023 store_size(b3, max_objwaste);
1024 printf("Loss %15s %15s %15s\n",
1025 b1, b2, b3);
1026 }
1027
sort_slabs(void)1028 static void sort_slabs(void)
1029 {
1030 struct slabinfo *s1,*s2;
1031
1032 for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
1033 for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
1034 int result;
1035
1036 if (sort_size)
1037 result = slab_size(s1) < slab_size(s2);
1038 else if (sort_active)
1039 result = slab_activity(s1) < slab_activity(s2);
1040 else if (sort_loss)
1041 result = slab_waste(s1) < slab_waste(s2);
1042 else
1043 result = strcasecmp(s1->name, s2->name);
1044
1045 if (show_inverted)
1046 result = -result;
1047
1048 if (result > 0) {
1049 struct slabinfo t;
1050
1051 memcpy(&t, s1, sizeof(struct slabinfo));
1052 memcpy(s1, s2, sizeof(struct slabinfo));
1053 memcpy(s2, &t, sizeof(struct slabinfo));
1054 }
1055 }
1056 }
1057 }
1058
sort_aliases(void)1059 static void sort_aliases(void)
1060 {
1061 struct aliasinfo *a1,*a2;
1062
1063 for (a1 = aliasinfo; a1 < aliasinfo + aliases; a1++) {
1064 for (a2 = a1 + 1; a2 < aliasinfo + aliases; a2++) {
1065 char *n1, *n2;
1066
1067 n1 = a1->name;
1068 n2 = a2->name;
1069 if (show_alias && !show_inverted) {
1070 n1 = a1->ref;
1071 n2 = a2->ref;
1072 }
1073 if (strcasecmp(n1, n2) > 0) {
1074 struct aliasinfo t;
1075
1076 memcpy(&t, a1, sizeof(struct aliasinfo));
1077 memcpy(a1, a2, sizeof(struct aliasinfo));
1078 memcpy(a2, &t, sizeof(struct aliasinfo));
1079 }
1080 }
1081 }
1082 }
1083
link_slabs(void)1084 static void link_slabs(void)
1085 {
1086 struct aliasinfo *a;
1087 struct slabinfo *s;
1088
1089 for (a = aliasinfo; a < aliasinfo + aliases; a++) {
1090
1091 for (s = slabinfo; s < slabinfo + slabs; s++)
1092 if (strcmp(a->ref, s->name) == 0) {
1093 a->slab = s;
1094 s->refs++;
1095 break;
1096 }
1097 if (s == slabinfo + slabs)
1098 fatal("Unresolved alias %s\n", a->ref);
1099 }
1100 }
1101
alias(void)1102 static void alias(void)
1103 {
1104 struct aliasinfo *a;
1105 char *active = NULL;
1106
1107 sort_aliases();
1108 link_slabs();
1109
1110 for(a = aliasinfo; a < aliasinfo + aliases; a++) {
1111
1112 if (!show_single_ref && a->slab->refs == 1)
1113 continue;
1114
1115 if (!show_inverted) {
1116 if (active) {
1117 if (strcmp(a->slab->name, active) == 0) {
1118 printf(" %s", a->name);
1119 continue;
1120 }
1121 }
1122 printf("\n%-12s <- %s", a->slab->name, a->name);
1123 active = a->slab->name;
1124 }
1125 else
1126 printf("%-15s -> %s\n", a->name, a->slab->name);
1127 }
1128 if (active)
1129 printf("\n");
1130 }
1131
1132
rename_slabs(void)1133 static void rename_slabs(void)
1134 {
1135 struct slabinfo *s;
1136 struct aliasinfo *a;
1137
1138 for (s = slabinfo; s < slabinfo + slabs; s++) {
1139 if (*s->name != ':')
1140 continue;
1141
1142 if (s->refs > 1 && !show_first_alias)
1143 continue;
1144
1145 a = find_one_alias(s);
1146
1147 if (a)
1148 s->name = a->name;
1149 else {
1150 s->name = "*";
1151 actual_slabs--;
1152 }
1153 }
1154 }
1155
slab_mismatch(char * slab)1156 static int slab_mismatch(char *slab)
1157 {
1158 return regexec(&pattern, slab, 0, NULL, 0);
1159 }
1160
read_slab_dir(void)1161 static void read_slab_dir(void)
1162 {
1163 DIR *dir;
1164 struct dirent *de;
1165 struct slabinfo *slab = slabinfo;
1166 struct aliasinfo *alias = aliasinfo;
1167 char *p;
1168 char *t;
1169 int count;
1170
1171 if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
1172 fatal("SYSFS support for SLUB not active\n");
1173
1174 dir = opendir(".");
1175 while ((de = readdir(dir))) {
1176 if (de->d_name[0] == '.' ||
1177 (de->d_name[0] != ':' && slab_mismatch(de->d_name)))
1178 continue;
1179 switch (de->d_type) {
1180 case DT_LNK:
1181 alias->name = strdup(de->d_name);
1182 count = readlink(de->d_name, buffer, sizeof(buffer)-1);
1183
1184 if (count < 0)
1185 fatal("Cannot read symlink %s\n", de->d_name);
1186
1187 buffer[count] = 0;
1188 p = buffer + count;
1189 while (p > buffer && p[-1] != '/')
1190 p--;
1191 alias->ref = strdup(p);
1192 alias++;
1193 break;
1194 case DT_DIR:
1195 if (chdir(de->d_name))
1196 fatal("Unable to access slab %s\n", slab->name);
1197 slab->name = strdup(de->d_name);
1198 slab->alias = 0;
1199 slab->refs = 0;
1200 slab->aliases = get_obj("aliases");
1201 slab->align = get_obj("align");
1202 slab->cache_dma = get_obj("cache_dma");
1203 slab->cpu_slabs = get_obj("cpu_slabs");
1204 slab->destroy_by_rcu = get_obj("destroy_by_rcu");
1205 slab->hwcache_align = get_obj("hwcache_align");
1206 slab->object_size = get_obj("object_size");
1207 slab->objects = get_obj("objects");
1208 slab->objects_partial = get_obj("objects_partial");
1209 slab->objects_total = get_obj("objects_total");
1210 slab->objs_per_slab = get_obj("objs_per_slab");
1211 slab->order = get_obj("order");
1212 slab->partial = get_obj("partial");
1213 slab->partial = get_obj_and_str("partial", &t);
1214 decode_numa_list(slab->numa_partial, t);
1215 free(t);
1216 slab->poison = get_obj("poison");
1217 slab->reclaim_account = get_obj("reclaim_account");
1218 slab->red_zone = get_obj("red_zone");
1219 slab->sanity_checks = get_obj("sanity_checks");
1220 slab->slab_size = get_obj("slab_size");
1221 slab->slabs = get_obj_and_str("slabs", &t);
1222 decode_numa_list(slab->numa, t);
1223 free(t);
1224 slab->store_user = get_obj("store_user");
1225 slab->trace = get_obj("trace");
1226 slab->alloc_fastpath = get_obj("alloc_fastpath");
1227 slab->alloc_slowpath = get_obj("alloc_slowpath");
1228 slab->free_fastpath = get_obj("free_fastpath");
1229 slab->free_slowpath = get_obj("free_slowpath");
1230 slab->free_frozen= get_obj("free_frozen");
1231 slab->free_add_partial = get_obj("free_add_partial");
1232 slab->free_remove_partial = get_obj("free_remove_partial");
1233 slab->alloc_from_partial = get_obj("alloc_from_partial");
1234 slab->alloc_slab = get_obj("alloc_slab");
1235 slab->alloc_refill = get_obj("alloc_refill");
1236 slab->free_slab = get_obj("free_slab");
1237 slab->cpuslab_flush = get_obj("cpuslab_flush");
1238 slab->deactivate_full = get_obj("deactivate_full");
1239 slab->deactivate_empty = get_obj("deactivate_empty");
1240 slab->deactivate_to_head = get_obj("deactivate_to_head");
1241 slab->deactivate_to_tail = get_obj("deactivate_to_tail");
1242 slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
1243 slab->order_fallback = get_obj("order_fallback");
1244 slab->cmpxchg_double_cpu_fail = get_obj("cmpxchg_double_cpu_fail");
1245 slab->cmpxchg_double_fail = get_obj("cmpxchg_double_fail");
1246 slab->cpu_partial_alloc = get_obj("cpu_partial_alloc");
1247 slab->cpu_partial_free = get_obj("cpu_partial_free");
1248 slab->alloc_node_mismatch = get_obj("alloc_node_mismatch");
1249 slab->deactivate_bypass = get_obj("deactivate_bypass");
1250 chdir("..");
1251 if (slab->name[0] == ':')
1252 alias_targets++;
1253 slab++;
1254 break;
1255 default :
1256 fatal("Unknown file type %lx\n", de->d_type);
1257 }
1258 }
1259 closedir(dir);
1260 slabs = slab - slabinfo;
1261 actual_slabs = slabs;
1262 aliases = alias - aliasinfo;
1263 if (slabs > MAX_SLABS)
1264 fatal("Too many slabs\n");
1265 if (aliases > MAX_ALIASES)
1266 fatal("Too many aliases\n");
1267 }
1268
output_slabs(void)1269 static void output_slabs(void)
1270 {
1271 struct slabinfo *slab;
1272 int lines = output_lines;
1273
1274 for (slab = slabinfo; (slab < slabinfo + slabs) &&
1275 lines != 0; slab++) {
1276
1277 if (slab->alias)
1278 continue;
1279
1280 if (lines != -1)
1281 lines--;
1282
1283 if (show_numa)
1284 slab_numa(slab, 0);
1285 else if (show_track)
1286 show_tracking(slab);
1287 else if (validate)
1288 slab_validate(slab);
1289 else if (shrink)
1290 slab_shrink(slab);
1291 else if (set_debug)
1292 slab_debug(slab);
1293 else if (show_ops)
1294 ops(slab);
1295 else if (show_slab)
1296 slabcache(slab);
1297 else if (show_report)
1298 report(slab);
1299 }
1300 }
1301
xtotals(void)1302 static void xtotals(void)
1303 {
1304 totals();
1305
1306 link_slabs();
1307 rename_slabs();
1308
1309 printf("\nSlabs sorted by size\n");
1310 printf("--------------------\n");
1311 sort_loss = 0;
1312 sort_size = 1;
1313 sort_slabs();
1314 output_slabs();
1315
1316 printf("\nSlabs sorted by loss\n");
1317 printf("--------------------\n");
1318 line = 0;
1319 sort_loss = 1;
1320 sort_size = 0;
1321 sort_slabs();
1322 output_slabs();
1323 printf("\n");
1324 }
1325
1326 struct option opts[] = {
1327 { "aliases", no_argument, NULL, 'a' },
1328 { "activity", no_argument, NULL, 'A' },
1329 { "debug", optional_argument, NULL, 'd' },
1330 { "display-activity", no_argument, NULL, 'D' },
1331 { "empty", no_argument, NULL, 'e' },
1332 { "first-alias", no_argument, NULL, 'f' },
1333 { "help", no_argument, NULL, 'h' },
1334 { "inverted", no_argument, NULL, 'i'},
1335 { "slabs", no_argument, NULL, 'l' },
1336 { "numa", no_argument, NULL, 'n' },
1337 { "ops", no_argument, NULL, 'o' },
1338 { "shrink", no_argument, NULL, 's' },
1339 { "report", no_argument, NULL, 'r' },
1340 { "Size", no_argument, NULL, 'S'},
1341 { "tracking", no_argument, NULL, 't'},
1342 { "Totals", no_argument, NULL, 'T'},
1343 { "validate", no_argument, NULL, 'v' },
1344 { "zero", no_argument, NULL, 'z' },
1345 { "1ref", no_argument, NULL, '1'},
1346 { "lines", required_argument, NULL, 'N'},
1347 { "Loss", no_argument, NULL, 'L'},
1348 { "Xtotals", no_argument, NULL, 'X'},
1349 { "Bytes", no_argument, NULL, 'B'},
1350 { NULL, 0, NULL, 0 }
1351 };
1352
main(int argc,char * argv[])1353 int main(int argc, char *argv[])
1354 {
1355 int c;
1356 int err;
1357 char *pattern_source;
1358
1359 page_size = getpagesize();
1360
1361 while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTSN:LXB",
1362 opts, NULL)) != -1)
1363 switch (c) {
1364 case '1':
1365 show_single_ref = 1;
1366 break;
1367 case 'a':
1368 show_alias = 1;
1369 break;
1370 case 'A':
1371 sort_active = 1;
1372 break;
1373 case 'd':
1374 set_debug = 1;
1375 if (!debug_opt_scan(optarg))
1376 fatal("Invalid debug option '%s'\n", optarg);
1377 break;
1378 case 'D':
1379 show_activity = 1;
1380 break;
1381 case 'e':
1382 show_empty = 1;
1383 break;
1384 case 'f':
1385 show_first_alias = 1;
1386 break;
1387 case 'h':
1388 usage();
1389 return 0;
1390 case 'i':
1391 show_inverted = 1;
1392 break;
1393 case 'n':
1394 show_numa = 1;
1395 break;
1396 case 'o':
1397 show_ops = 1;
1398 break;
1399 case 'r':
1400 show_report = 1;
1401 break;
1402 case 's':
1403 shrink = 1;
1404 break;
1405 case 'l':
1406 show_slab = 1;
1407 break;
1408 case 't':
1409 show_track = 1;
1410 break;
1411 case 'v':
1412 validate = 1;
1413 break;
1414 case 'z':
1415 skip_zero = 0;
1416 break;
1417 case 'T':
1418 show_totals = 1;
1419 break;
1420 case 'S':
1421 sort_size = 1;
1422 break;
1423 case 'N':
1424 if (optarg) {
1425 output_lines = atoi(optarg);
1426 if (output_lines < 1)
1427 output_lines = 1;
1428 }
1429 break;
1430 case 'L':
1431 sort_loss = 1;
1432 break;
1433 case 'X':
1434 if (output_lines == -1)
1435 output_lines = 1;
1436 extended_totals = 1;
1437 show_bytes = 1;
1438 break;
1439 case 'B':
1440 show_bytes = 1;
1441 break;
1442 default:
1443 fatal("%s: Invalid option '%c'\n", argv[0], optopt);
1444
1445 }
1446
1447 if (!show_slab && !show_alias && !show_track && !show_report
1448 && !validate && !shrink && !set_debug && !show_ops)
1449 show_slab = 1;
1450
1451 if (argc > optind)
1452 pattern_source = argv[optind];
1453 else
1454 pattern_source = ".*";
1455
1456 err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
1457 if (err)
1458 fatal("%s: Invalid pattern '%s' code %d\n",
1459 argv[0], pattern_source, err);
1460 read_slab_dir();
1461 if (show_alias) {
1462 alias();
1463 } else if (extended_totals) {
1464 xtotals();
1465 } else if (show_totals) {
1466 totals();
1467 } else {
1468 link_slabs();
1469 rename_slabs();
1470 sort_slabs();
1471 output_slabs();
1472 }
1473 return 0;
1474 }
1475