tools/vm/slabinfo.c

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