tools/vm/slabinfo.c

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