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