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TOMOYO Linux Cross Reference
Linux/tools/vm/slabinfo.c

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  1 /*
  2  * Slabinfo: Tool to get reports about slabs
  3  *
  4  * (C) 2007 sgi, Christoph Lameter
  5  * (C) 2011 Linux Foundation, Christoph Lameter
  6  *
  7  * Compile with:
  8  *
  9  * gcc -o slabinfo slabinfo.c
 10  */
 11 #include <stdio.h>
 12 #include <stdlib.h>
 13 #include <sys/types.h>
 14 #include <dirent.h>
 15 #include <strings.h>
 16 #include <string.h>
 17 #include <unistd.h>
 18 #include <stdarg.h>
 19 #include <getopt.h>
 20 #include <regex.h>
 21 #include <errno.h>
 22 
 23 #define MAX_SLABS 500
 24 #define MAX_ALIASES 500
 25 #define MAX_NODES 1024
 26 
 27 struct slabinfo {
 28         char *name;
 29         int alias;
 30         int refs;
 31         int aliases, align, cache_dma, cpu_slabs, destroy_by_rcu;
 32         int hwcache_align, object_size, objs_per_slab;
 33         int sanity_checks, slab_size, store_user, trace;
 34         int order, poison, reclaim_account, red_zone;
 35         unsigned long partial, objects, slabs, objects_partial, objects_total;
 36         unsigned long alloc_fastpath, alloc_slowpath;
 37         unsigned long free_fastpath, free_slowpath;
 38         unsigned long free_frozen, free_add_partial, free_remove_partial;
 39         unsigned long alloc_from_partial, alloc_slab, free_slab, alloc_refill;
 40         unsigned long cpuslab_flush, deactivate_full, deactivate_empty;
 41         unsigned long deactivate_to_head, deactivate_to_tail;
 42         unsigned long deactivate_remote_frees, order_fallback;
 43         unsigned long cmpxchg_double_cpu_fail, cmpxchg_double_fail;
 44         unsigned long alloc_node_mismatch, deactivate_bypass;
 45         unsigned long cpu_partial_alloc, cpu_partial_free;
 46         int numa[MAX_NODES];
 47         int numa_partial[MAX_NODES];
 48 } slabinfo[MAX_SLABS];
 49 
 50 struct aliasinfo {
 51         char *name;
 52         char *ref;
 53         struct slabinfo *slab;
 54 } aliasinfo[MAX_ALIASES];
 55 
 56 int slabs;
 57 int actual_slabs;
 58 int aliases;
 59 int alias_targets;
 60 int highest_node;
 61 
 62 char buffer[4096];
 63 
 64 int show_empty;
 65 int show_report;
 66 int show_alias;
 67 int show_slab;
 68 int skip_zero = 1;
 69 int show_numa;
 70 int show_track;
 71 int show_first_alias;
 72 int validate;
 73 int shrink;
 74 int show_inverted;
 75 int show_single_ref;
 76 int show_totals;
 77 int sort_size;
 78 int sort_active;
 79 int set_debug;
 80 int show_ops;
 81 int show_activity;
 82 int output_lines = -1;
 83 int sort_loss;
 84 int extended_totals;
 85 int show_bytes;
 86 
 87 /* Debug options */
 88 int sanity;
 89 int redzone;
 90 int poison;
 91 int tracking;
 92 int tracing;
 93 
 94 int page_size;
 95 
 96 regex_t pattern;
 97 
 98 static void fatal(const char *x, ...)
 99 {
100         va_list ap;
101 
102         va_start(ap, x);
103         vfprintf(stderr, x, ap);
104         va_end(ap);
105         exit(EXIT_FAILURE);
106 }
107 
108 static void usage(void)
109 {
110         printf("slabinfo 4/15/2011. (c) 2007 sgi/(c) 2011 Linux Foundation.\n\n"
111                 "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
112                 "-a|--aliases           Show aliases\n"
113                 "-A|--activity          Most active slabs first\n"
114                 "-d<options>|--debug=<options> Set/Clear Debug options\n"
115                 "-D|--display-active    Switch line format to activity\n"
116                 "-e|--empty             Show empty slabs\n"
117                 "-f|--first-alias       Show first alias\n"
118                 "-h|--help              Show usage information\n"
119                 "-i|--inverted          Inverted list\n"
120                 "-l|--slabs             Show slabs\n"
121                 "-n|--numa              Show NUMA information\n"
122                 "-o|--ops               Show kmem_cache_ops\n"
123                 "-s|--shrink            Shrink slabs\n"
124                 "-r|--report            Detailed report on single slabs\n"
125                 "-S|--Size              Sort by size\n"
126                 "-t|--tracking          Show alloc/free information\n"
127                 "-T|--Totals            Show summary information\n"
128                 "-v|--validate          Validate slabs\n"
129                 "-z|--zero              Include empty slabs\n"
130                 "-1|--1ref              Single reference\n"
131                 "-N|--lines=K           Show the first K slabs\n"
132                 "-L|--Loss              Sort by loss\n"
133                 "-X|--Xtotals           Show extended summary information\n"
134                 "-B|--Bytes             Show size in bytes\n"
135                 "\nValid debug options (FZPUT may be combined)\n"
136                 "a / A          Switch on all debug options (=FZUP)\n"
137                 "-              Switch off all debug options\n"
138                 "f / F          Sanity Checks (SLAB_CONSISTENCY_CHECKS)\n"
139                 "z / Z          Redzoning\n"
140                 "p / P          Poisoning\n"
141                 "u / U          Tracking\n"
142                 "t / T          Tracing\n"
143         );
144 }
145 
146 static unsigned long read_obj(const char *name)
147 {
148         FILE *f = fopen(name, "r");
149 
150         if (!f)
151                 buffer[0] = 0;
152         else {
153                 if (!fgets(buffer, sizeof(buffer), f))
154                         buffer[0] = 0;
155                 fclose(f);
156                 if (buffer[strlen(buffer)] == '\n')
157                         buffer[strlen(buffer)] = 0;
158         }
159         return strlen(buffer);
160 }
161 
162 
163 /*
164  * Get the contents of an attribute
165  */
166 static unsigned long get_obj(const char *name)
167 {
168         if (!read_obj(name))
169                 return 0;
170 
171         return atol(buffer);
172 }
173 
174 static unsigned long get_obj_and_str(const char *name, char **x)
175 {
176         unsigned long result = 0;
177         char *p;
178 
179         *x = NULL;
180 
181         if (!read_obj(name)) {
182                 x = NULL;
183                 return 0;
184         }
185         result = strtoul(buffer, &p, 10);
186         while (*p == ' ')
187                 p++;
188         if (*p)
189                 *x = strdup(p);
190         return result;
191 }
192 
193 static void set_obj(struct slabinfo *s, const char *name, int n)
194 {
195         char x[100];
196         FILE *f;
197 
198         snprintf(x, 100, "%s/%s", s->name, name);
199         f = fopen(x, "w");
200         if (!f)
201                 fatal("Cannot write to %s\n", x);
202 
203         fprintf(f, "%d\n", n);
204         fclose(f);
205 }
206 
207 static unsigned long read_slab_obj(struct slabinfo *s, const char *name)
208 {
209         char x[100];
210         FILE *f;
211         size_t l;
212 
213         snprintf(x, 100, "%s/%s", s->name, name);
214         f = fopen(x, "r");
215         if (!f) {
216                 buffer[0] = 0;
217                 l = 0;
218         } else {
219                 l = fread(buffer, 1, sizeof(buffer), f);
220                 buffer[l] = 0;
221                 fclose(f);
222         }
223         return l;
224 }
225 
226 
227 /*
228  * Put a size string together
229  */
230 static int store_size(char *buffer, unsigned long value)
231 {
232         unsigned long divisor = 1;
233         char trailer = 0;
234         int n;
235 
236         if (!show_bytes) {
237                 if (value > 1000000000UL) {
238                         divisor = 100000000UL;
239                         trailer = 'G';
240                 } else if (value > 1000000UL) {
241                         divisor = 100000UL;
242                         trailer = 'M';
243                 } else if (value > 1000UL) {
244                         divisor = 100;
245                         trailer = 'K';
246                 }
247         }
248 
249         value /= divisor;
250         n = sprintf(buffer, "%ld",value);
251         if (trailer) {
252                 buffer[n] = trailer;
253                 n++;
254                 buffer[n] = 0;
255         }
256         if (divisor != 1) {
257                 memmove(buffer + n - 2, buffer + n - 3, 4);
258                 buffer[n-2] = '.';
259                 n++;
260         }
261         return n;
262 }
263 
264 static void decode_numa_list(int *numa, char *t)
265 {
266         int node;
267         int nr;
268 
269         memset(numa, 0, MAX_NODES * sizeof(int));
270 
271         if (!t)
272                 return;
273 
274         while (*t == 'N') {
275                 t++;
276                 node = strtoul(t, &t, 10);
277                 if (*t == '=') {
278                         t++;
279                         nr = strtoul(t, &t, 10);
280                         numa[node] = nr;
281                         if (node > highest_node)
282                                 highest_node = node;
283                 }
284                 while (*t == ' ')
285                         t++;
286         }
287 }
288 
289 static void slab_validate(struct slabinfo *s)
290 {
291         if (strcmp(s->name, "*") == 0)
292                 return;
293 
294         set_obj(s, "validate", 1);
295 }
296 
297 static void slab_shrink(struct slabinfo *s)
298 {
299         if (strcmp(s->name, "*") == 0)
300                 return;
301 
302         set_obj(s, "shrink", 1);
303 }
304 
305 int line = 0;
306 
307 static void first_line(void)
308 {
309         if (show_activity)
310                 printf("Name                   Objects      Alloc       Free"
311                         "   %%Fast Fallb O CmpX   UL\n");
312         else
313                 printf("Name                   Objects Objsize           %s "
314                         "Slabs/Part/Cpu  O/S O %%Fr %%Ef Flg\n",
315                         sort_loss ? " Loss" : "Space");
316 }
317 
318 /*
319  * Find the shortest alias of a slab
320  */
321 static struct aliasinfo *find_one_alias(struct slabinfo *find)
322 {
323         struct aliasinfo *a;
324         struct aliasinfo *best = NULL;
325 
326         for(a = aliasinfo;a < aliasinfo + aliases; a++) {
327                 if (a->slab == find &&
328                         (!best || strlen(best->name) < strlen(a->name))) {
329                                 best = a;
330                                 if (strncmp(a->name,"kmall", 5) == 0)
331                                         return best;
332                         }
333         }
334         return best;
335 }
336 
337 static unsigned long slab_size(struct slabinfo *s)
338 {
339         return  s->slabs * (page_size << s->order);
340 }
341 
342 static unsigned long slab_activity(struct slabinfo *s)
343 {
344         return  s->alloc_fastpath + s->free_fastpath +
345                 s->alloc_slowpath + s->free_slowpath;
346 }
347 
348 static unsigned long slab_waste(struct slabinfo *s)
349 {
350         return  slab_size(s) - s->objects * s->object_size;
351 }
352 
353 static void slab_numa(struct slabinfo *s, int mode)
354 {
355         int node;
356 
357         if (strcmp(s->name, "*") == 0)
358                 return;
359 
360         if (!highest_node) {
361                 printf("\n%s: No NUMA information available.\n", s->name);
362                 return;
363         }
364 
365         if (skip_zero && !s->slabs)
366                 return;
367 
368         if (!line) {
369                 printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
370                 for(node = 0; node <= highest_node; node++)
371                         printf(" %4d", node);
372                 printf("\n----------------------");
373                 for(node = 0; node <= highest_node; node++)
374                         printf("-----");
375                 printf("\n");
376         }
377         printf("%-21s ", mode ? "All slabs" : s->name);
378         for(node = 0; node <= highest_node; node++) {
379                 char b[20];
380 
381                 store_size(b, s->numa[node]);
382                 printf(" %4s", b);
383         }
384         printf("\n");
385         if (mode) {
386                 printf("%-21s ", "Partial slabs");
387                 for(node = 0; node <= highest_node; node++) {
388                         char b[20];
389 
390                         store_size(b, s->numa_partial[node]);
391                         printf(" %4s", b);
392                 }
393                 printf("\n");
394         }
395         line++;
396 }
397 
398 static void show_tracking(struct slabinfo *s)
399 {
400         printf("\n%s: Kernel object allocation\n", s->name);
401         printf("-----------------------------------------------------------------------\n");
402         if (read_slab_obj(s, "alloc_calls"))
403                 printf("%s", buffer);
404         else
405                 printf("No Data\n");
406 
407         printf("\n%s: Kernel object freeing\n", s->name);
408         printf("------------------------------------------------------------------------\n");
409         if (read_slab_obj(s, "free_calls"))
410                 printf("%s", buffer);
411         else
412                 printf("No Data\n");
413 
414 }
415 
416 static void ops(struct slabinfo *s)
417 {
418         if (strcmp(s->name, "*") == 0)
419                 return;
420 
421         if (read_slab_obj(s, "ops")) {
422                 printf("\n%s: kmem_cache operations\n", s->name);
423                 printf("--------------------------------------------\n");
424                 printf("%s", buffer);
425         } else
426                 printf("\n%s has no kmem_cache operations\n", s->name);
427 }
428 
429 static const char *onoff(int x)
430 {
431         if (x)
432                 return "On ";
433         return "Off";
434 }
435 
436 static void slab_stats(struct slabinfo *s)
437 {
438         unsigned long total_alloc;
439         unsigned long total_free;
440         unsigned long total;
441 
442         if (!s->alloc_slab)
443                 return;
444 
445         total_alloc = s->alloc_fastpath + s->alloc_slowpath;
446         total_free = s->free_fastpath + s->free_slowpath;
447 
448         if (!total_alloc)
449                 return;
450 
451         printf("\n");
452         printf("Slab Perf Counter       Alloc     Free %%Al %%Fr\n");
453         printf("--------------------------------------------------\n");
454         printf("Fastpath             %8lu %8lu %3lu %3lu\n",
455                 s->alloc_fastpath, s->free_fastpath,
456                 s->alloc_fastpath * 100 / total_alloc,
457                 total_free ? s->free_fastpath * 100 / total_free : 0);
458         printf("Slowpath             %8lu %8lu %3lu %3lu\n",
459                 total_alloc - s->alloc_fastpath, s->free_slowpath,
460                 (total_alloc - s->alloc_fastpath) * 100 / total_alloc,
461                 total_free ? s->free_slowpath * 100 / total_free : 0);
462         printf("Page Alloc           %8lu %8lu %3lu %3lu\n",
463                 s->alloc_slab, s->free_slab,
464                 s->alloc_slab * 100 / total_alloc,
465                 total_free ? s->free_slab * 100 / total_free : 0);
466         printf("Add partial          %8lu %8lu %3lu %3lu\n",
467                 s->deactivate_to_head + s->deactivate_to_tail,
468                 s->free_add_partial,
469                 (s->deactivate_to_head + s->deactivate_to_tail) * 100 / total_alloc,
470                 total_free ? s->free_add_partial * 100 / total_free : 0);
471         printf("Remove partial       %8lu %8lu %3lu %3lu\n",
472                 s->alloc_from_partial, s->free_remove_partial,
473                 s->alloc_from_partial * 100 / total_alloc,
474                 total_free ? s->free_remove_partial * 100 / total_free : 0);
475 
476         printf("Cpu partial list     %8lu %8lu %3lu %3lu\n",
477                 s->cpu_partial_alloc, s->cpu_partial_free,
478                 s->cpu_partial_alloc * 100 / total_alloc,
479                 total_free ? s->cpu_partial_free * 100 / total_free : 0);
480 
481         printf("RemoteObj/SlabFrozen %8lu %8lu %3lu %3lu\n",
482                 s->deactivate_remote_frees, s->free_frozen,
483                 s->deactivate_remote_frees * 100 / total_alloc,
484                 total_free ? s->free_frozen * 100 / total_free : 0);
485 
486         printf("Total                %8lu %8lu\n\n", total_alloc, total_free);
487 
488         if (s->cpuslab_flush)
489                 printf("Flushes %8lu\n", s->cpuslab_flush);
490 
491         total = s->deactivate_full + s->deactivate_empty +
492                         s->deactivate_to_head + s->deactivate_to_tail + s->deactivate_bypass;
493 
494         if (total) {
495                 printf("\nSlab Deactivation             Occurrences %%\n");
496                 printf("-------------------------------------------------\n");
497                 printf("Slab full                     %7lu  %3lu%%\n",
498                         s->deactivate_full, (s->deactivate_full * 100) / total);
499                 printf("Slab empty                    %7lu  %3lu%%\n",
500                         s->deactivate_empty, (s->deactivate_empty * 100) / total);
501                 printf("Moved to head of partial list %7lu  %3lu%%\n",
502                         s->deactivate_to_head, (s->deactivate_to_head * 100) / total);
503                 printf("Moved to tail of partial list %7lu  %3lu%%\n",
504                         s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total);
505                 printf("Deactivation bypass           %7lu  %3lu%%\n",
506                         s->deactivate_bypass, (s->deactivate_bypass * 100) / total);
507                 printf("Refilled from foreign frees   %7lu  %3lu%%\n",
508                         s->alloc_refill, (s->alloc_refill * 100) / total);
509                 printf("Node mismatch                 %7lu  %3lu%%\n",
510                         s->alloc_node_mismatch, (s->alloc_node_mismatch * 100) / total);
511         }
512 
513         if (s->cmpxchg_double_fail || s->cmpxchg_double_cpu_fail) {
514                 printf("\nCmpxchg_double Looping\n------------------------\n");
515                 printf("Locked Cmpxchg Double redos   %lu\nUnlocked Cmpxchg Double redos %lu\n",
516                         s->cmpxchg_double_fail, s->cmpxchg_double_cpu_fail);
517         }
518 }
519 
520 static void report(struct slabinfo *s)
521 {
522         if (strcmp(s->name, "*") == 0)
523                 return;
524 
525         printf("\nSlabcache: %-15s  Aliases: %2d Order : %2d Objects: %lu\n",
526                 s->name, s->aliases, s->order, s->objects);
527         if (s->hwcache_align)
528                 printf("** Hardware cacheline aligned\n");
529         if (s->cache_dma)
530                 printf("** Memory is allocated in a special DMA zone\n");
531         if (s->destroy_by_rcu)
532                 printf("** Slabs are destroyed via RCU\n");
533         if (s->reclaim_account)
534                 printf("** Reclaim accounting active\n");
535 
536         printf("\nSizes (bytes)     Slabs              Debug                Memory\n");
537         printf("------------------------------------------------------------------------\n");
538         printf("Object : %7d  Total  : %7ld   Sanity Checks : %s  Total: %7ld\n",
539                         s->object_size, s->slabs, onoff(s->sanity_checks),
540                         s->slabs * (page_size << s->order));
541         printf("SlabObj: %7d  Full   : %7ld   Redzoning     : %s  Used : %7ld\n",
542                         s->slab_size, s->slabs - s->partial - s->cpu_slabs,
543                         onoff(s->red_zone), s->objects * s->object_size);
544         printf("SlabSiz: %7d  Partial: %7ld   Poisoning     : %s  Loss : %7ld\n",
545                         page_size << s->order, s->partial, onoff(s->poison),
546                         s->slabs * (page_size << s->order) - s->objects * s->object_size);
547         printf("Loss   : %7d  CpuSlab: %7d   Tracking      : %s  Lalig: %7ld\n",
548                         s->slab_size - s->object_size, s->cpu_slabs, onoff(s->store_user),
549                         (s->slab_size - s->object_size) * s->objects);
550         printf("Align  : %7d  Objects: %7d   Tracing       : %s  Lpadd: %7ld\n",
551                         s->align, s->objs_per_slab, onoff(s->trace),
552                         ((page_size << s->order) - s->objs_per_slab * s->slab_size) *
553                         s->slabs);
554 
555         ops(s);
556         show_tracking(s);
557         slab_numa(s, 1);
558         slab_stats(s);
559 }
560 
561 static void slabcache(struct slabinfo *s)
562 {
563         char size_str[20];
564         char dist_str[40];
565         char flags[20];
566         char *p = flags;
567 
568         if (strcmp(s->name, "*") == 0)
569                 return;
570 
571         if (actual_slabs == 1) {
572                 report(s);
573                 return;
574         }
575 
576         if (skip_zero && !show_empty && !s->slabs)
577                 return;
578 
579         if (show_empty && s->slabs)
580                 return;
581 
582         if (sort_loss == 0)
583                 store_size(size_str, slab_size(s));
584         else
585                 store_size(size_str, slab_waste(s));
586         snprintf(dist_str, 40, "%lu/%lu/%d", s->slabs - s->cpu_slabs,
587                                                 s->partial, s->cpu_slabs);
588 
589         if (!line++)
590                 first_line();
591 
592         if (s->aliases)
593                 *p++ = '*';
594         if (s->cache_dma)
595                 *p++ = 'd';
596         if (s->hwcache_align)
597                 *p++ = 'A';
598         if (s->poison)
599                 *p++ = 'P';
600         if (s->reclaim_account)
601                 *p++ = 'a';
602         if (s->red_zone)
603                 *p++ = 'Z';
604         if (s->sanity_checks)
605                 *p++ = 'F';
606         if (s->store_user)
607                 *p++ = 'U';
608         if (s->trace)
609                 *p++ = 'T';
610 
611         *p = 0;
612         if (show_activity) {
613                 unsigned long total_alloc;
614                 unsigned long total_free;
615 
616                 total_alloc = s->alloc_fastpath + s->alloc_slowpath;
617                 total_free = s->free_fastpath + s->free_slowpath;
618 
619                 printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d %4ld %4ld\n",
620                         s->name, s->objects,
621                         total_alloc, total_free,
622                         total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,
623                         total_free ? (s->free_fastpath * 100 / total_free) : 0,
624                         s->order_fallback, s->order, s->cmpxchg_double_fail,
625                         s->cmpxchg_double_cpu_fail);
626         } else {
627                 printf("%-21s %8ld %7d %15s %14s %4d %1d %3ld %3ld %s\n",
628                         s->name, s->objects, s->object_size, size_str, dist_str,
629                         s->objs_per_slab, s->order,
630                         s->slabs ? (s->partial * 100) / s->slabs : 100,
631                         s->slabs ? (s->objects * s->object_size * 100) /
632                                 (s->slabs * (page_size << s->order)) : 100,
633                         flags);
634         }
635 }
636 
637 /*
638  * Analyze debug options. Return false if something is amiss.
639  */
640 static int debug_opt_scan(char *opt)
641 {
642         if (!opt || !opt[0] || strcmp(opt, "-") == 0)
643                 return 1;
644 
645         if (strcasecmp(opt, "a") == 0) {
646                 sanity = 1;
647                 poison = 1;
648                 redzone = 1;
649                 tracking = 1;
650                 return 1;
651         }
652 
653         for ( ; *opt; opt++)
654                 switch (*opt) {
655                 case 'F' : case 'f':
656                         if (sanity)
657                                 return 0;
658                         sanity = 1;
659                         break;
660                 case 'P' : case 'p':
661                         if (poison)
662                                 return 0;
663                         poison = 1;
664                         break;
665 
666                 case 'Z' : case 'z':
667                         if (redzone)
668                                 return 0;
669                         redzone = 1;
670                         break;
671 
672                 case 'U' : case 'u':
673                         if (tracking)
674                                 return 0;
675                         tracking = 1;
676                         break;
677 
678                 case 'T' : case 't':
679                         if (tracing)
680                                 return 0;
681                         tracing = 1;
682                         break;
683                 default:
684                         return 0;
685                 }
686         return 1;
687 }
688 
689 static int slab_empty(struct slabinfo *s)
690 {
691         if (s->objects > 0)
692                 return 0;
693 
694         /*
695          * We may still have slabs even if there are no objects. Shrinking will
696          * remove them.
697          */
698         if (s->slabs != 0)
699                 set_obj(s, "shrink", 1);
700 
701         return 1;
702 }
703 
704 static void slab_debug(struct slabinfo *s)
705 {
706         if (strcmp(s->name, "*") == 0)
707                 return;
708 
709         if (sanity && !s->sanity_checks) {
710                 set_obj(s, "sanity", 1);
711         }
712         if (!sanity && s->sanity_checks) {
713                 if (slab_empty(s))
714                         set_obj(s, "sanity", 0);
715                 else
716                         fprintf(stderr, "%s not empty cannot disable sanity checks\n", s->name);
717         }
718         if (redzone && !s->red_zone) {
719                 if (slab_empty(s))
720                         set_obj(s, "red_zone", 1);
721                 else
722                         fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
723         }
724         if (!redzone && s->red_zone) {
725                 if (slab_empty(s))
726                         set_obj(s, "red_zone", 0);
727                 else
728                         fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
729         }
730         if (poison && !s->poison) {
731                 if (slab_empty(s))
732                         set_obj(s, "poison", 1);
733                 else
734                         fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
735         }
736         if (!poison && s->poison) {
737                 if (slab_empty(s))
738                         set_obj(s, "poison", 0);
739                 else
740                         fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
741         }
742         if (tracking && !s->store_user) {
743                 if (slab_empty(s))
744                         set_obj(s, "store_user", 1);
745                 else
746                         fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
747         }
748         if (!tracking && s->store_user) {
749                 if (slab_empty(s))
750                         set_obj(s, "store_user", 0);
751                 else
752                         fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
753         }
754         if (tracing && !s->trace) {
755                 if (slabs == 1)
756                         set_obj(s, "trace", 1);
757                 else
758                         fprintf(stderr, "%s can only enable trace for one slab at a time\n", s->name);
759         }
760         if (!tracing && s->trace)
761                 set_obj(s, "trace", 1);
762 }
763 
764 static void totals(void)
765 {
766         struct slabinfo *s;
767 
768         int used_slabs = 0;
769         char b1[20], b2[20], b3[20], b4[20];
770         unsigned long long max = 1ULL << 63;
771 
772         /* Object size */
773         unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
774 
775         /* Number of partial slabs in a slabcache */
776         unsigned long long min_partial = max, max_partial = 0,
777                                 avg_partial, total_partial = 0;
778 
779         /* Number of slabs in a slab cache */
780         unsigned long long min_slabs = max, max_slabs = 0,
781                                 avg_slabs, total_slabs = 0;
782 
783         /* Size of the whole slab */
784         unsigned long long min_size = max, max_size = 0,
785                                 avg_size, total_size = 0;
786 
787         /* Bytes used for object storage in a slab */
788         unsigned long long min_used = max, max_used = 0,
789                                 avg_used, total_used = 0;
790 
791         /* Waste: Bytes used for alignment and padding */
792         unsigned long long min_waste = max, max_waste = 0,
793                                 avg_waste, total_waste = 0;
794         /* Number of objects in a slab */
795         unsigned long long min_objects = max, max_objects = 0,
796                                 avg_objects, total_objects = 0;
797         /* Waste per object */
798         unsigned long long min_objwaste = max,
799                                 max_objwaste = 0, avg_objwaste,
800                                 total_objwaste = 0;
801 
802         /* Memory per object */
803         unsigned long long min_memobj = max,
804                                 max_memobj = 0, avg_memobj,
805                                 total_objsize = 0;
806 
807         /* Percentage of partial slabs per slab */
808         unsigned long min_ppart = 100, max_ppart = 0,
809                                 avg_ppart, total_ppart = 0;
810 
811         /* Number of objects in partial slabs */
812         unsigned long min_partobj = max, max_partobj = 0,
813                                 avg_partobj, total_partobj = 0;
814 
815         /* Percentage of partial objects of all objects in a slab */
816         unsigned long min_ppartobj = 100, max_ppartobj = 0,
817                                 avg_ppartobj, total_ppartobj = 0;
818 
819 
820         for (s = slabinfo; s < slabinfo + slabs; s++) {
821                 unsigned long long size;
822                 unsigned long used;
823                 unsigned long long wasted;
824                 unsigned long long objwaste;
825                 unsigned long percentage_partial_slabs;
826                 unsigned long percentage_partial_objs;
827 
828                 if (!s->slabs || !s->objects)
829                         continue;
830 
831                 used_slabs++;
832 
833                 size = slab_size(s);
834                 used = s->objects * s->object_size;
835                 wasted = size - used;
836                 objwaste = s->slab_size - s->object_size;
837 
838                 percentage_partial_slabs = s->partial * 100 / s->slabs;
839                 if (percentage_partial_slabs > 100)
840                         percentage_partial_slabs = 100;
841 
842                 percentage_partial_objs = s->objects_partial * 100
843                                                         / s->objects;
844 
845                 if (percentage_partial_objs > 100)
846                         percentage_partial_objs = 100;
847 
848                 if (s->object_size < min_objsize)
849                         min_objsize = s->object_size;
850                 if (s->partial < min_partial)
851                         min_partial = s->partial;
852                 if (s->slabs < min_slabs)
853                         min_slabs = s->slabs;
854                 if (size < min_size)
855                         min_size = size;
856                 if (wasted < min_waste)
857                         min_waste = wasted;
858                 if (objwaste < min_objwaste)
859                         min_objwaste = objwaste;
860                 if (s->objects < min_objects)
861                         min_objects = s->objects;
862                 if (used < min_used)
863                         min_used = used;
864                 if (s->objects_partial < min_partobj)
865                         min_partobj = s->objects_partial;
866                 if (percentage_partial_slabs < min_ppart)
867                         min_ppart = percentage_partial_slabs;
868                 if (percentage_partial_objs < min_ppartobj)
869                         min_ppartobj = percentage_partial_objs;
870                 if (s->slab_size < min_memobj)
871                         min_memobj = s->slab_size;
872 
873                 if (s->object_size > max_objsize)
874                         max_objsize = s->object_size;
875                 if (s->partial > max_partial)
876                         max_partial = s->partial;
877                 if (s->slabs > max_slabs)
878                         max_slabs = s->slabs;
879                 if (size > max_size)
880                         max_size = size;
881                 if (wasted > max_waste)
882                         max_waste = wasted;
883                 if (objwaste > max_objwaste)
884                         max_objwaste = objwaste;
885                 if (s->objects > max_objects)
886                         max_objects = s->objects;
887                 if (used > max_used)
888                         max_used = used;
889                 if (s->objects_partial > max_partobj)
890                         max_partobj = s->objects_partial;
891                 if (percentage_partial_slabs > max_ppart)
892                         max_ppart = percentage_partial_slabs;
893                 if (percentage_partial_objs > max_ppartobj)
894                         max_ppartobj = percentage_partial_objs;
895                 if (s->slab_size > max_memobj)
896                         max_memobj = s->slab_size;
897 
898                 total_partial += s->partial;
899                 total_slabs += s->slabs;
900                 total_size += size;
901                 total_waste += wasted;
902 
903                 total_objects += s->objects;
904                 total_used += used;
905                 total_partobj += s->objects_partial;
906                 total_ppart += percentage_partial_slabs;
907                 total_ppartobj += percentage_partial_objs;
908 
909                 total_objwaste += s->objects * objwaste;
910                 total_objsize += s->objects * s->slab_size;
911         }
912 
913         if (!total_objects) {
914                 printf("No objects\n");
915                 return;
916         }
917         if (!used_slabs) {
918                 printf("No slabs\n");
919                 return;
920         }
921 
922         /* Per slab averages */
923         avg_partial = total_partial / used_slabs;
924         avg_slabs = total_slabs / used_slabs;
925         avg_size = total_size / used_slabs;
926         avg_waste = total_waste / used_slabs;
927 
928         avg_objects = total_objects / used_slabs;
929         avg_used = total_used / used_slabs;
930         avg_partobj = total_partobj / used_slabs;
931         avg_ppart = total_ppart / used_slabs;
932         avg_ppartobj = total_ppartobj / used_slabs;
933 
934         /* Per object object sizes */
935         avg_objsize = total_used / total_objects;
936         avg_objwaste = total_objwaste / total_objects;
937         avg_partobj = total_partobj * 100 / total_objects;
938         avg_memobj = total_objsize / total_objects;
939 
940         printf("Slabcache Totals\n");
941         printf("----------------\n");
942         printf("Slabcaches : %15d   Aliases  : %11d->%-3d  Active:    %3d\n",
943                         slabs, aliases, alias_targets, used_slabs);
944 
945         store_size(b1, total_size);store_size(b2, total_waste);
946         store_size(b3, total_waste * 100 / total_used);
947         printf("Memory used: %15s   # Loss   : %15s   MRatio:%6s%%\n", b1, b2, b3);
948 
949         store_size(b1, total_objects);store_size(b2, total_partobj);
950         store_size(b3, total_partobj * 100 / total_objects);
951         printf("# Objects  : %15s   # PartObj: %15s   ORatio:%6s%%\n", b1, b2, b3);
952 
953         printf("\n");
954         printf("Per Cache         Average              "
955                 "Min              Max            Total\n");
956         printf("---------------------------------------"
957                 "-------------------------------------\n");
958 
959         store_size(b1, avg_objects);store_size(b2, min_objects);
960         store_size(b3, max_objects);store_size(b4, total_objects);
961         printf("#Objects  %15s  %15s  %15s  %15s\n",
962                         b1,     b2,     b3,     b4);
963 
964         store_size(b1, avg_slabs);store_size(b2, min_slabs);
965         store_size(b3, max_slabs);store_size(b4, total_slabs);
966         printf("#Slabs    %15s  %15s  %15s  %15s\n",
967                         b1,     b2,     b3,     b4);
968 
969         store_size(b1, avg_partial);store_size(b2, min_partial);
970         store_size(b3, max_partial);store_size(b4, total_partial);
971         printf("#PartSlab %15s  %15s  %15s  %15s\n",
972                         b1,     b2,     b3,     b4);
973         store_size(b1, avg_ppart);store_size(b2, min_ppart);
974         store_size(b3, max_ppart);
975         store_size(b4, total_partial * 100  / total_slabs);
976         printf("%%PartSlab%15s%% %15s%% %15s%% %15s%%\n",
977                         b1,     b2,     b3,     b4);
978 
979         store_size(b1, avg_partobj);store_size(b2, min_partobj);
980         store_size(b3, max_partobj);
981         store_size(b4, total_partobj);
982         printf("PartObjs  %15s  %15s  %15s  %15s\n",
983                         b1,     b2,     b3,     b4);
984 
985         store_size(b1, avg_ppartobj);store_size(b2, min_ppartobj);
986         store_size(b3, max_ppartobj);
987         store_size(b4, total_partobj * 100 / total_objects);
988         printf("%% PartObj%15s%% %15s%% %15s%% %15s%%\n",
989                         b1,     b2,     b3,     b4);
990 
991         store_size(b1, avg_size);store_size(b2, min_size);
992         store_size(b3, max_size);store_size(b4, total_size);
993         printf("Memory    %15s  %15s  %15s  %15s\n",
994                         b1,     b2,     b3,     b4);
995 
996         store_size(b1, avg_used);store_size(b2, min_used);
997         store_size(b3, max_used);store_size(b4, total_used);
998         printf("Used      %15s  %15s  %15s  %15s\n",
999                         b1,     b2,     b3,     b4);
1000 
1001         store_size(b1, avg_waste);store_size(b2, min_waste);
1002         store_size(b3, max_waste);store_size(b4, total_waste);
1003         printf("Loss      %15s  %15s  %15s  %15s\n",
1004                         b1,     b2,     b3,     b4);
1005 
1006         printf("\n");
1007         printf("Per Object        Average              "
1008                 "Min              Max\n");
1009         printf("---------------------------------------"
1010                 "--------------------\n");
1011 
1012         store_size(b1, avg_memobj);store_size(b2, min_memobj);
1013         store_size(b3, max_memobj);
1014         printf("Memory    %15s  %15s  %15s\n",
1015                         b1,     b2,     b3);
1016         store_size(b1, avg_objsize);store_size(b2, min_objsize);
1017         store_size(b3, max_objsize);
1018         printf("User      %15s  %15s  %15s\n",
1019                         b1,     b2,     b3);
1020 
1021         store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
1022         store_size(b3, max_objwaste);
1023         printf("Loss      %15s  %15s  %15s\n",
1024                         b1,     b2,     b3);
1025 }
1026 
1027 static void sort_slabs(void)
1028 {
1029         struct slabinfo *s1,*s2;
1030 
1031         for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
1032                 for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
1033                         int result;
1034 
1035                         if (sort_size)
1036                                 result = slab_size(s1) < slab_size(s2);
1037                         else if (sort_active)
1038                                 result = slab_activity(s1) < slab_activity(s2);
1039                         else if (sort_loss)
1040                                 result = slab_waste(s1) < slab_waste(s2);
1041                         else
1042                                 result = strcasecmp(s1->name, s2->name);
1043 
1044                         if (show_inverted)
1045                                 result = -result;
1046 
1047                         if (result > 0) {
1048                                 struct slabinfo t;
1049 
1050                                 memcpy(&t, s1, sizeof(struct slabinfo));
1051                                 memcpy(s1, s2, sizeof(struct slabinfo));
1052                                 memcpy(s2, &t, sizeof(struct slabinfo));
1053                         }
1054                 }
1055         }
1056 }
1057 
1058 static void sort_aliases(void)
1059 {
1060         struct aliasinfo *a1,*a2;
1061 
1062         for (a1 = aliasinfo; a1 < aliasinfo + aliases; a1++) {
1063                 for (a2 = a1 + 1; a2 < aliasinfo + aliases; a2++) {
1064                         char *n1, *n2;
1065 
1066                         n1 = a1->name;
1067                         n2 = a2->name;
1068                         if (show_alias && !show_inverted) {
1069                                 n1 = a1->ref;
1070                                 n2 = a2->ref;
1071                         }
1072                         if (strcasecmp(n1, n2) > 0) {
1073                                 struct aliasinfo t;
1074 
1075                                 memcpy(&t, a1, sizeof(struct aliasinfo));
1076                                 memcpy(a1, a2, sizeof(struct aliasinfo));
1077                                 memcpy(a2, &t, sizeof(struct aliasinfo));
1078                         }
1079                 }
1080         }
1081 }
1082 
1083 static void link_slabs(void)
1084 {
1085         struct aliasinfo *a;
1086         struct slabinfo *s;
1087 
1088         for (a = aliasinfo; a < aliasinfo + aliases; a++) {
1089 
1090                 for (s = slabinfo; s < slabinfo + slabs; s++)
1091                         if (strcmp(a->ref, s->name) == 0) {
1092                                 a->slab = s;
1093                                 s->refs++;
1094                                 break;
1095                         }
1096                 if (s == slabinfo + slabs)
1097                         fatal("Unresolved alias %s\n", a->ref);
1098         }
1099 }
1100 
1101 static void alias(void)
1102 {
1103         struct aliasinfo *a;
1104         char *active = NULL;
1105 
1106         sort_aliases();
1107         link_slabs();
1108 
1109         for(a = aliasinfo; a < aliasinfo + aliases; a++) {
1110 
1111                 if (!show_single_ref && a->slab->refs == 1)
1112                         continue;
1113 
1114                 if (!show_inverted) {
1115                         if (active) {
1116                                 if (strcmp(a->slab->name, active) == 0) {
1117                                         printf(" %s", a->name);
1118                                         continue;
1119                                 }
1120                         }
1121                         printf("\n%-12s <- %s", a->slab->name, a->name);
1122                         active = a->slab->name;
1123                 }
1124                 else
1125                         printf("%-15s -> %s\n", a->name, a->slab->name);
1126         }
1127         if (active)
1128                 printf("\n");
1129 }
1130 
1131 
1132 static void rename_slabs(void)
1133 {
1134         struct slabinfo *s;
1135         struct aliasinfo *a;
1136 
1137         for (s = slabinfo; s < slabinfo + slabs; s++) {
1138                 if (*s->name != ':')
1139                         continue;
1140 
1141                 if (s->refs > 1 && !show_first_alias)
1142                         continue;
1143 
1144                 a = find_one_alias(s);
1145 
1146                 if (a)
1147                         s->name = a->name;
1148                 else {
1149                         s->name = "*";
1150                         actual_slabs--;
1151                 }
1152         }
1153 }
1154 
1155 static int slab_mismatch(char *slab)
1156 {
1157         return regexec(&pattern, slab, 0, NULL, 0);
1158 }
1159 
1160 static void read_slab_dir(void)
1161 {
1162         DIR *dir;
1163         struct dirent *de;
1164         struct slabinfo *slab = slabinfo;
1165         struct aliasinfo *alias = aliasinfo;
1166         char *p;
1167         char *t;
1168         int count;
1169 
1170         if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
1171                 fatal("SYSFS support for SLUB not active\n");
1172 
1173         dir = opendir(".");
1174         while ((de = readdir(dir))) {
1175                 if (de->d_name[0] == '.' ||
1176                         (de->d_name[0] != ':' && slab_mismatch(de->d_name)))
1177                                 continue;
1178                 switch (de->d_type) {
1179                    case DT_LNK:
1180                         alias->name = strdup(de->d_name);
1181                         count = readlink(de->d_name, buffer, sizeof(buffer)-1);
1182 
1183                         if (count < 0)
1184                                 fatal("Cannot read symlink %s\n", de->d_name);
1185 
1186                         buffer[count] = 0;
1187                         p = buffer + count;
1188                         while (p > buffer && p[-1] != '/')
1189                                 p--;
1190                         alias->ref = strdup(p);
1191                         alias++;
1192                         break;
1193                    case DT_DIR:
1194                         if (chdir(de->d_name))
1195                                 fatal("Unable to access slab %s\n", slab->name);
1196                         slab->name = strdup(de->d_name);
1197                         slab->alias = 0;
1198                         slab->refs = 0;
1199                         slab->aliases = get_obj("aliases");
1200                         slab->align = get_obj("align");
1201                         slab->cache_dma = get_obj("cache_dma");
1202                         slab->cpu_slabs = get_obj("cpu_slabs");
1203                         slab->destroy_by_rcu = get_obj("destroy_by_rcu");
1204                         slab->hwcache_align = get_obj("hwcache_align");
1205                         slab->object_size = get_obj("object_size");
1206                         slab->objects = get_obj("objects");
1207                         slab->objects_partial = get_obj("objects_partial");
1208                         slab->objects_total = get_obj("objects_total");
1209                         slab->objs_per_slab = get_obj("objs_per_slab");
1210                         slab->order = get_obj("order");
1211                         slab->partial = get_obj("partial");
1212                         slab->partial = get_obj_and_str("partial", &t);
1213                         decode_numa_list(slab->numa_partial, t);
1214                         free(t);
1215                         slab->poison = get_obj("poison");
1216                         slab->reclaim_account = get_obj("reclaim_account");
1217                         slab->red_zone = get_obj("red_zone");
1218                         slab->sanity_checks = get_obj("sanity_checks");
1219                         slab->slab_size = get_obj("slab_size");
1220                         slab->slabs = get_obj_and_str("slabs", &t);
1221                         decode_numa_list(slab->numa, t);
1222                         free(t);
1223                         slab->store_user = get_obj("store_user");
1224                         slab->trace = get_obj("trace");
1225                         slab->alloc_fastpath = get_obj("alloc_fastpath");
1226                         slab->alloc_slowpath = get_obj("alloc_slowpath");
1227                         slab->free_fastpath = get_obj("free_fastpath");
1228                         slab->free_slowpath = get_obj("free_slowpath");
1229                         slab->free_frozen= get_obj("free_frozen");
1230                         slab->free_add_partial = get_obj("free_add_partial");
1231                         slab->free_remove_partial = get_obj("free_remove_partial");
1232                         slab->alloc_from_partial = get_obj("alloc_from_partial");
1233                         slab->alloc_slab = get_obj("alloc_slab");
1234                         slab->alloc_refill = get_obj("alloc_refill");
1235                         slab->free_slab = get_obj("free_slab");
1236                         slab->cpuslab_flush = get_obj("cpuslab_flush");
1237                         slab->deactivate_full = get_obj("deactivate_full");
1238                         slab->deactivate_empty = get_obj("deactivate_empty");
1239                         slab->deactivate_to_head = get_obj("deactivate_to_head");
1240                         slab->deactivate_to_tail = get_obj("deactivate_to_tail");
1241                         slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
1242                         slab->order_fallback = get_obj("order_fallback");
1243                         slab->cmpxchg_double_cpu_fail = get_obj("cmpxchg_double_cpu_fail");
1244                         slab->cmpxchg_double_fail = get_obj("cmpxchg_double_fail");
1245                         slab->cpu_partial_alloc = get_obj("cpu_partial_alloc");
1246                         slab->cpu_partial_free = get_obj("cpu_partial_free");
1247                         slab->alloc_node_mismatch = get_obj("alloc_node_mismatch");
1248                         slab->deactivate_bypass = get_obj("deactivate_bypass");
1249                         chdir("..");
1250                         if (slab->name[0] == ':')
1251                                 alias_targets++;
1252                         slab++;
1253                         break;
1254                    default :
1255                         fatal("Unknown file type %lx\n", de->d_type);
1256                 }
1257         }
1258         closedir(dir);
1259         slabs = slab - slabinfo;
1260         actual_slabs = slabs;
1261         aliases = alias - aliasinfo;
1262         if (slabs > MAX_SLABS)
1263                 fatal("Too many slabs\n");
1264         if (aliases > MAX_ALIASES)
1265                 fatal("Too many aliases\n");
1266 }
1267 
1268 static void output_slabs(void)
1269 {
1270         struct slabinfo *slab;
1271         int lines = output_lines;
1272 
1273         for (slab = slabinfo; (slab < slabinfo + slabs) &&
1274                         lines != 0; slab++) {
1275 
1276                 if (slab->alias)
1277                         continue;
1278 
1279                 if (lines != -1)
1280                         lines--;
1281 
1282                 if (show_numa)
1283                         slab_numa(slab, 0);
1284                 else if (show_track)
1285                         show_tracking(slab);
1286                 else if (validate)
1287                         slab_validate(slab);
1288                 else if (shrink)
1289                         slab_shrink(slab);
1290                 else if (set_debug)
1291                         slab_debug(slab);
1292                 else if (show_ops)
1293                         ops(slab);
1294                 else if (show_slab)
1295                         slabcache(slab);
1296                 else if (show_report)
1297                         report(slab);
1298         }
1299 }
1300 
1301 static void xtotals(void)
1302 {
1303         totals();
1304 
1305         link_slabs();
1306         rename_slabs();
1307 
1308         printf("\nSlabs sorted by size\n");
1309         printf("--------------------\n");
1310         sort_loss = 0;
1311         sort_size = 1;
1312         sort_slabs();
1313         output_slabs();
1314 
1315         printf("\nSlabs sorted by loss\n");
1316         printf("--------------------\n");
1317         line = 0;
1318         sort_loss = 1;
1319         sort_size = 0;
1320         sort_slabs();
1321         output_slabs();
1322         printf("\n");
1323 }
1324 
1325 struct option opts[] = {
1326         { "aliases", no_argument, NULL, 'a' },
1327         { "activity", no_argument, NULL, 'A' },
1328         { "debug", optional_argument, NULL, 'd' },
1329         { "display-activity", no_argument, NULL, 'D' },
1330         { "empty", no_argument, NULL, 'e' },
1331         { "first-alias", no_argument, NULL, 'f' },
1332         { "help", no_argument, NULL, 'h' },
1333         { "inverted", no_argument, NULL, 'i'},
1334         { "slabs", no_argument, NULL, 'l' },
1335         { "numa", no_argument, NULL, 'n' },
1336         { "ops", no_argument, NULL, 'o' },
1337         { "shrink", no_argument, NULL, 's' },
1338         { "report", no_argument, NULL, 'r' },
1339         { "Size", no_argument, NULL, 'S'},
1340         { "tracking", no_argument, NULL, 't'},
1341         { "Totals", no_argument, NULL, 'T'},
1342         { "validate", no_argument, NULL, 'v' },
1343         { "zero", no_argument, NULL, 'z' },
1344         { "1ref", no_argument, NULL, '1'},
1345         { "lines", required_argument, NULL, 'N'},
1346         { "Loss", no_argument, NULL, 'L'},
1347         { "Xtotals", no_argument, NULL, 'X'},
1348         { "Bytes", no_argument, NULL, 'B'},
1349         { NULL, 0, NULL, 0 }
1350 };
1351 
1352 int main(int argc, char *argv[])
1353 {
1354         int c;
1355         int err;
1356         char *pattern_source;
1357 
1358         page_size = getpagesize();
1359 
1360         while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTSN:LXB",
1361                                                 opts, NULL)) != -1)
1362                 switch (c) {
1363                 case '1':
1364                         show_single_ref = 1;
1365                         break;
1366                 case 'a':
1367                         show_alias = 1;
1368                         break;
1369                 case 'A':
1370                         sort_active = 1;
1371                         break;
1372                 case 'd':
1373                         set_debug = 1;
1374                         if (!debug_opt_scan(optarg))
1375                                 fatal("Invalid debug option '%s'\n", optarg);
1376                         break;
1377                 case 'D':
1378                         show_activity = 1;
1379                         break;
1380                 case 'e':
1381                         show_empty = 1;
1382                         break;
1383                 case 'f':
1384                         show_first_alias = 1;
1385                         break;
1386                 case 'h':
1387                         usage();
1388                         return 0;
1389                 case 'i':
1390                         show_inverted = 1;
1391                         break;
1392                 case 'n':
1393                         show_numa = 1;
1394                         break;
1395                 case 'o':
1396                         show_ops = 1;
1397                         break;
1398                 case 'r':
1399                         show_report = 1;
1400                         break;
1401                 case 's':
1402                         shrink = 1;
1403                         break;
1404                 case 'l':
1405                         show_slab = 1;
1406                         break;
1407                 case 't':
1408                         show_track = 1;
1409                         break;
1410                 case 'v':
1411                         validate = 1;
1412                         break;
1413                 case 'z':
1414                         skip_zero = 0;
1415                         break;
1416                 case 'T':
1417                         show_totals = 1;
1418                         break;
1419                 case 'S':
1420                         sort_size = 1;
1421                         break;
1422                 case 'N':
1423                         if (optarg) {
1424                                 output_lines = atoi(optarg);
1425                                 if (output_lines < 1)
1426                                         output_lines = 1;
1427                         }
1428                         break;
1429                 case 'L':
1430                         sort_loss = 1;
1431                         break;
1432                 case 'X':
1433                         if (output_lines == -1)
1434                                 output_lines = 1;
1435                         extended_totals = 1;
1436                         show_bytes = 1;
1437                         break;
1438                 case 'B':
1439                         show_bytes = 1;
1440                         break;
1441                 default:
1442                         fatal("%s: Invalid option '%c'\n", argv[0], optopt);
1443 
1444         }
1445 
1446         if (!show_slab && !show_alias && !show_track && !show_report
1447                 && !validate && !shrink && !set_debug && !show_ops)
1448                         show_slab = 1;
1449 
1450         if (argc > optind)
1451                 pattern_source = argv[optind];
1452         else
1453                 pattern_source = ".*";
1454 
1455         err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
1456         if (err)
1457                 fatal("%s: Invalid pattern '%s' code %d\n",
1458                         argv[0], pattern_source, err);
1459         read_slab_dir();
1460         if (show_alias) {
1461                 alias();
1462         } else if (extended_totals) {
1463                 xtotals();
1464         } else if (show_totals) {
1465                 totals();
1466         } else {
1467                 link_slabs();
1468                 rename_slabs();
1469                 sort_slabs();
1470                 output_slabs();
1471         }
1472         return 0;
1473 }
1474 

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