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