linux/tools/vm/slabinfo.c
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   1/*
   2 * Slabinfo: Tool to get reports about slabs
   3 *
   4 * (C) 2007 sgi, Christoph Lameter
   5 * (C) 2011 Linux Foundation, Christoph Lameter
   6 *
   7 * Compile with:
   8 *
   9 * gcc -o slabinfo slabinfo.c
  10 */
  11#include <stdio.h>
  12#include <stdlib.h>
  13#include <sys/types.h>
  14#include <dirent.h>
  15#include <strings.h>
  16#include <string.h>
  17#include <unistd.h>
  18#include <stdarg.h>
  19#include <getopt.h>
  20#include <regex.h>
  21#include <errno.h>
  22
  23#define MAX_SLABS 500
  24#define MAX_ALIASES 500
  25#define MAX_NODES 1024
  26
  27struct 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
  50struct aliasinfo {
  51        char *name;
  52        char *ref;
  53        struct slabinfo *slab;
  54} aliasinfo[MAX_ALIASES];
  55
  56int slabs = 0;
  57int actual_slabs = 0;
  58int aliases = 0;
  59int alias_targets = 0;
  60int highest_node = 0;
  61
  62char buffer[4096];
  63
  64int show_empty = 0;
  65int show_report = 0;
  66int show_alias = 0;
  67int show_slab = 0;
  68int skip_zero = 1;
  69int show_numa = 0;
  70int show_track = 0;
  71int show_first_alias = 0;
  72int validate = 0;
  73int shrink = 0;
  74int show_inverted = 0;
  75int show_single_ref = 0;
  76int show_totals = 0;
  77int sort_size = 0;
  78int sort_active = 0;
  79int set_debug = 0;
  80int show_ops = 0;
  81int show_activity = 0;
  82
  83/* Debug options */
  84int sanity = 0;
  85int redzone = 0;
  86int poison = 0;
  87int tracking = 0;
  88int tracing = 0;
  89
  90int page_size;
  91
  92regex_t pattern;
  93
  94static void fatal(const char *x, ...)
  95{
  96        va_list ap;
  97
  98        va_start(ap, x);
  99        vfprintf(stderr, x, ap);
 100        va_end(ap);
 101        exit(EXIT_FAILURE);
 102}
 103
 104static void usage(void)
 105{
 106        printf("slabinfo 4/15/2011. (c) 2007 sgi/(c) 2011 Linux Foundation.\n\n"
 107                "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
 108                "-a|--aliases           Show aliases\n"
 109                "-A|--activity          Most active slabs first\n"
 110                "-d<options>|--debug=<options> Set/Clear Debug options\n"
 111                "-D|--display-active    Switch line format to activity\n"
 112                "-e|--empty             Show empty slabs\n"
 113                "-f|--first-alias       Show first alias\n"
 114                "-h|--help              Show usage information\n"
 115                "-i|--inverted          Inverted list\n"
 116                "-l|--slabs             Show slabs\n"
 117                "-n|--numa              Show NUMA information\n"
 118                "-o|--ops               Show kmem_cache_ops\n"
 119                "-s|--shrink            Shrink slabs\n"
 120                "-r|--report            Detailed report on single slabs\n"
 121                "-S|--Size              Sort by size\n"
 122                "-t|--tracking          Show alloc/free information\n"
 123                "-T|--Totals            Show summary information\n"
 124                "-v|--validate          Validate slabs\n"
 125                "-z|--zero              Include empty slabs\n"
 126                "-1|--1ref              Single reference\n"
 127                "\nValid debug options (FZPUT may be combined)\n"
 128                "a / A          Switch on all debug options (=FZUP)\n"
 129                "-              Switch off all debug options\n"
 130                "f / F          Sanity Checks (SLAB_DEBUG_FREE)\n"
 131                "z / Z          Redzoning\n"
 132                "p / P          Poisoning\n"
 133                "u / U          Tracking\n"
 134                "t / T          Tracing\n"
 135        );
 136}
 137
 138static unsigned long read_obj(const char *name)
 139{
 140        FILE *f = fopen(name, "r");
 141
 142        if (!f)
 143                buffer[0] = 0;
 144        else {
 145                if (!fgets(buffer, sizeof(buffer), f))
 146                        buffer[0] = 0;
 147                fclose(f);
 148                if (buffer[strlen(buffer)] == '\n')
 149                        buffer[strlen(buffer)] = 0;
 150        }
 151        return strlen(buffer);
 152}
 153
 154
 155/*
 156 * Get the contents of an attribute
 157 */
 158static unsigned long get_obj(const char *name)
 159{
 160        if (!read_obj(name))
 161                return 0;
 162
 163        return atol(buffer);
 164}
 165
 166static unsigned long get_obj_and_str(const char *name, char **x)
 167{
 168        unsigned long result = 0;
 169        char *p;
 170
 171        *x = NULL;
 172
 173        if (!read_obj(name)) {
 174                x = NULL;
 175                return 0;
 176        }
 177        result = strtoul(buffer, &p, 10);
 178        while (*p == ' ')
 179                p++;
 180        if (*p)
 181                *x = strdup(p);
 182        return result;
 183}
 184
 185static void set_obj(struct slabinfo *s, const char *name, int n)
 186{
 187        char x[100];
 188        FILE *f;
 189
 190        snprintf(x, 100, "%s/%s", s->name, name);
 191        f = fopen(x, "w");
 192        if (!f)
 193                fatal("Cannot write to %s\n", x);
 194
 195        fprintf(f, "%d\n", n);
 196        fclose(f);
 197}
 198
 199static unsigned long read_slab_obj(struct slabinfo *s, const char *name)
 200{
 201        char x[100];
 202        FILE *f;
 203        size_t l;
 204
 205        snprintf(x, 100, "%s/%s", s->name, name);
 206        f = fopen(x, "r");
 207        if (!f) {
 208                buffer[0] = 0;
 209                l = 0;
 210        } else {
 211                l = fread(buffer, 1, sizeof(buffer), f);
 212                buffer[l] = 0;
 213                fclose(f);
 214        }
 215        return l;
 216}
 217
 218
 219/*
 220 * Put a size string together
 221 */
 222static int store_size(char *buffer, unsigned long value)
 223{
 224        unsigned long divisor = 1;
 225        char trailer = 0;
 226        int n;
 227
 228        if (value > 1000000000UL) {
 229                divisor = 100000000UL;
 230                trailer = 'G';
 231        } else if (value > 1000000UL) {
 232                divisor = 100000UL;
 233                trailer = 'M';
 234        } else if (value > 1000UL) {
 235                divisor = 100;
 236                trailer = 'K';
 237        }
 238
 239        value /= divisor;
 240        n = sprintf(buffer, "%ld",value);
 241        if (trailer) {
 242                buffer[n] = trailer;
 243                n++;
 244                buffer[n] = 0;
 245        }
 246        if (divisor != 1) {
 247                memmove(buffer + n - 2, buffer + n - 3, 4);
 248                buffer[n-2] = '.';
 249                n++;
 250        }
 251        return n;
 252}
 253
 254static void decode_numa_list(int *numa, char *t)
 255{
 256        int node;
 257        int nr;
 258
 259        memset(numa, 0, MAX_NODES * sizeof(int));
 260
 261        if (!t)
 262                return;
 263
 264        while (*t == 'N') {
 265                t++;
 266                node = strtoul(t, &t, 10);
 267                if (*t == '=') {
 268                        t++;
 269                        nr = strtoul(t, &t, 10);
 270                        numa[node] = nr;
 271                        if (node > highest_node)
 272                                highest_node = node;
 273                }
 274                while (*t == ' ')
 275                        t++;
 276        }
 277}
 278
 279static void slab_validate(struct slabinfo *s)
 280{
 281        if (strcmp(s->name, "*") == 0)
 282                return;
 283
 284        set_obj(s, "validate", 1);
 285}
 286
 287static void slab_shrink(struct slabinfo *s)
 288{
 289        if (strcmp(s->name, "*") == 0)
 290                return;
 291
 292        set_obj(s, "shrink", 1);
 293}
 294
 295int line = 0;
 296
 297static void first_line(void)
 298{
 299        if (show_activity)
 300                printf("Name                   Objects      Alloc       Free   %%Fast Fallb O CmpX   UL\n");
 301        else
 302                printf("Name                   Objects Objsize    Space "
 303                        "Slabs/Part/Cpu  O/S O %%Fr %%Ef Flg\n");
 304}
 305
 306/*
 307 * Find the shortest alias of a slab
 308 */
 309static struct aliasinfo *find_one_alias(struct slabinfo *find)
 310{
 311        struct aliasinfo *a;
 312        struct aliasinfo *best = NULL;
 313
 314        for(a = aliasinfo;a < aliasinfo + aliases; a++) {
 315                if (a->slab == find &&
 316                        (!best || strlen(best->name) < strlen(a->name))) {
 317                                best = a;
 318                                if (strncmp(a->name,"kmall", 5) == 0)
 319                                        return best;
 320                        }
 321        }
 322        return best;
 323}
 324
 325static unsigned long slab_size(struct slabinfo *s)
 326{
 327        return  s->slabs * (page_size << s->order);
 328}
 329
 330static unsigned long slab_activity(struct slabinfo *s)
 331{
 332        return  s->alloc_fastpath + s->free_fastpath +
 333                s->alloc_slowpath + s->free_slowpath;
 334}
 335
 336static void slab_numa(struct slabinfo *s, int mode)
 337{
 338        int node;
 339
 340        if (strcmp(s->name, "*") == 0)
 341                return;
 342
 343        if (!highest_node) {
 344                printf("\n%s: No NUMA information available.\n", s->name);
 345                return;
 346        }
 347
 348        if (skip_zero && !s->slabs)
 349                return;
 350
 351        if (!line) {
 352                printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
 353                for(node = 0; node <= highest_node; node++)
 354                        printf(" %4d", node);
 355                printf("\n----------------------");
 356                for(node = 0; node <= highest_node; node++)
 357                        printf("-----");
 358                printf("\n");
 359        }
 360        printf("%-21s ", mode ? "All slabs" : s->name);
 361        for(node = 0; node <= highest_node; node++) {
 362                char b[20];
 363
 364                store_size(b, s->numa[node]);
 365                printf(" %4s", b);
 366        }
 367        printf("\n");
 368        if (mode) {
 369                printf("%-21s ", "Partial slabs");
 370                for(node = 0; node <= highest_node; node++) {
 371                        char b[20];
 372
 373                        store_size(b, s->numa_partial[node]);
 374                        printf(" %4s", b);
 375                }
 376                printf("\n");
 377        }
 378        line++;
 379}
 380
 381static void show_tracking(struct slabinfo *s)
 382{
 383        printf("\n%s: Kernel object allocation\n", s->name);
 384        printf("-----------------------------------------------------------------------\n");
 385        if (read_slab_obj(s, "alloc_calls"))
 386                printf("%s", buffer);
 387        else
 388                printf("No Data\n");
 389
 390        printf("\n%s: Kernel object freeing\n", s->name);
 391        printf("------------------------------------------------------------------------\n");
 392        if (read_slab_obj(s, "free_calls"))
 393                printf("%s", buffer);
 394        else
 395                printf("No Data\n");
 396
 397}
 398
 399static void ops(struct slabinfo *s)
 400{
 401        if (strcmp(s->name, "*") == 0)
 402                return;
 403
 404        if (read_slab_obj(s, "ops")) {
 405                printf("\n%s: kmem_cache operations\n", s->name);
 406                printf("--------------------------------------------\n");
 407                printf("%s", buffer);
 408        } else
 409                printf("\n%s has no kmem_cache operations\n", s->name);
 410}
 411
 412static const char *onoff(int x)
 413{
 414        if (x)
 415                return "On ";
 416        return "Off";
 417}
 418
 419static void slab_stats(struct slabinfo *s)
 420{
 421        unsigned long total_alloc;
 422        unsigned long total_free;
 423        unsigned long total;
 424
 425        if (!s->alloc_slab)
 426                return;
 427
 428        total_alloc = s->alloc_fastpath + s->alloc_slowpath;
 429        total_free = s->free_fastpath + s->free_slowpath;
 430
 431        if (!total_alloc)
 432                return;
 433
 434        printf("\n");
 435        printf("Slab Perf Counter       Alloc     Free %%Al %%Fr\n");
 436        printf("--------------------------------------------------\n");
 437        printf("Fastpath             %8lu %8lu %3lu %3lu\n",
 438                s->alloc_fastpath, s->free_fastpath,
 439                s->alloc_fastpath * 100 / total_alloc,
 440                total_free ? s->free_fastpath * 100 / total_free : 0);
 441        printf("Slowpath             %8lu %8lu %3lu %3lu\n",
 442                total_alloc - s->alloc_fastpath, s->free_slowpath,
 443                (total_alloc - s->alloc_fastpath) * 100 / total_alloc,
 444                total_free ? s->free_slowpath * 100 / total_free : 0);
 445        printf("Page Alloc           %8lu %8lu %3lu %3lu\n",
 446                s->alloc_slab, s->free_slab,
 447                s->alloc_slab * 100 / total_alloc,
 448                total_free ? s->free_slab * 100 / total_free : 0);
 449        printf("Add partial          %8lu %8lu %3lu %3lu\n",
 450                s->deactivate_to_head + s->deactivate_to_tail,
 451                s->free_add_partial,
 452                (s->deactivate_to_head + s->deactivate_to_tail) * 100 / total_alloc,
 453                total_free ? s->free_add_partial * 100 / total_free : 0);
 454        printf("Remove partial       %8lu %8lu %3lu %3lu\n",
 455                s->alloc_from_partial, s->free_remove_partial,
 456                s->alloc_from_partial * 100 / total_alloc,
 457                total_free ? s->free_remove_partial * 100 / total_free : 0);
 458
 459        printf("Cpu partial list     %8lu %8lu %3lu %3lu\n",
 460                s->cpu_partial_alloc, s->cpu_partial_free,
 461                s->cpu_partial_alloc * 100 / total_alloc,
 462                total_free ? s->cpu_partial_free * 100 / total_free : 0);
 463
 464        printf("RemoteObj/SlabFrozen %8lu %8lu %3lu %3lu\n",
 465                s->deactivate_remote_frees, s->free_frozen,
 466                s->deactivate_remote_frees * 100 / total_alloc,
 467                total_free ? s->free_frozen * 100 / total_free : 0);
 468
 469        printf("Total                %8lu %8lu\n\n", total_alloc, total_free);
 470
 471        if (s->cpuslab_flush)
 472                printf("Flushes %8lu\n", s->cpuslab_flush);
 473
 474        total = s->deactivate_full + s->deactivate_empty +
 475                        s->deactivate_to_head + s->deactivate_to_tail + s->deactivate_bypass;
 476
 477        if (total) {
 478                printf("\nSlab Deactivation             Ocurrences  %%\n");
 479                printf("-------------------------------------------------\n");
 480                printf("Slab full                     %7lu  %3lu%%\n",
 481                        s->deactivate_full, (s->deactivate_full * 100) / total);
 482                printf("Slab empty                    %7lu  %3lu%%\n",
 483                        s->deactivate_empty, (s->deactivate_empty * 100) / total);
 484                printf("Moved to head of partial list %7lu  %3lu%%\n",
 485                        s->deactivate_to_head, (s->deactivate_to_head * 100) / total);
 486                printf("Moved to tail of partial list %7lu  %3lu%%\n",
 487                        s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total);
 488                printf("Deactivation bypass           %7lu  %3lu%%\n",
 489                        s->deactivate_bypass, (s->deactivate_bypass * 100) / total);
 490                printf("Refilled from foreign frees   %7lu  %3lu%%\n",
 491                        s->alloc_refill, (s->alloc_refill * 100) / total);
 492                printf("Node mismatch                 %7lu  %3lu%%\n",
 493                        s->alloc_node_mismatch, (s->alloc_node_mismatch * 100) / total);
 494        }
 495
 496        if (s->cmpxchg_double_fail || s->cmpxchg_double_cpu_fail)
 497                printf("\nCmpxchg_double Looping\n------------------------\n");
 498                printf("Locked Cmpxchg Double redos   %lu\nUnlocked Cmpxchg Double redos %lu\n",
 499                        s->cmpxchg_double_fail, s->cmpxchg_double_cpu_fail);
 500}
 501
 502static void report(struct slabinfo *s)
 503{
 504        if (strcmp(s->name, "*") == 0)
 505                return;
 506
 507        printf("\nSlabcache: %-20s  Aliases: %2d Order : %2d Objects: %lu\n",
 508                s->name, s->aliases, s->order, s->objects);
 509        if (s->hwcache_align)
 510                printf("** Hardware cacheline aligned\n");
 511        if (s->cache_dma)
 512                printf("** Memory is allocated in a special DMA zone\n");
 513        if (s->destroy_by_rcu)
 514                printf("** Slabs are destroyed via RCU\n");
 515        if (s->reclaim_account)
 516                printf("** Reclaim accounting active\n");
 517
 518        printf("\nSizes (bytes)     Slabs              Debug                Memory\n");
 519        printf("------------------------------------------------------------------------\n");
 520        printf("Object : %7d  Total  : %7ld   Sanity Checks : %s  Total: %7ld\n",
 521                        s->object_size, s->slabs, onoff(s->sanity_checks),
 522                        s->slabs * (page_size << s->order));
 523        printf("SlabObj: %7d  Full   : %7ld   Redzoning     : %s  Used : %7ld\n",
 524                        s->slab_size, s->slabs - s->partial - s->cpu_slabs,
 525                        onoff(s->red_zone), s->objects * s->object_size);
 526        printf("SlabSiz: %7d  Partial: %7ld   Poisoning     : %s  Loss : %7ld\n",
 527                        page_size << s->order, s->partial, onoff(s->poison),
 528                        s->slabs * (page_size << s->order) - s->objects * s->object_size);
 529        printf("Loss   : %7d  CpuSlab: %7d   Tracking      : %s  Lalig: %7ld\n",
 530                        s->slab_size - s->object_size, s->cpu_slabs, onoff(s->store_user),
 531                        (s->slab_size - s->object_size) * s->objects);
 532        printf("Align  : %7d  Objects: %7d   Tracing       : %s  Lpadd: %7ld\n",
 533                        s->align, s->objs_per_slab, onoff(s->trace),
 534                        ((page_size << s->order) - s->objs_per_slab * s->slab_size) *
 535                        s->slabs);
 536
 537        ops(s);
 538        show_tracking(s);
 539        slab_numa(s, 1);
 540        slab_stats(s);
 541}
 542
 543static void slabcache(struct slabinfo *s)
 544{
 545        char size_str[20];
 546        char dist_str[40];
 547        char flags[20];
 548        char *p = flags;
 549
 550        if (strcmp(s->name, "*") == 0)
 551                return;
 552
 553        if (actual_slabs == 1) {
 554                report(s);
 555                return;
 556        }
 557
 558        if (skip_zero && !show_empty && !s->slabs)
 559                return;
 560
 561        if (show_empty && s->slabs)
 562                return;
 563
 564        store_size(size_str, slab_size(s));
 565        snprintf(dist_str, 40, "%lu/%lu/%d", s->slabs - s->cpu_slabs,
 566                                                s->partial, s->cpu_slabs);
 567
 568        if (!line++)
 569                first_line();
 570
 571        if (s->aliases)
 572                *p++ = '*';
 573        if (s->cache_dma)
 574                *p++ = 'd';
 575        if (s->hwcache_align)
 576                *p++ = 'A';
 577        if (s->poison)
 578                *p++ = 'P';
 579        if (s->reclaim_account)
 580                *p++ = 'a';
 581        if (s->red_zone)
 582                *p++ = 'Z';
 583        if (s->sanity_checks)
 584                *p++ = 'F';
 585        if (s->store_user)
 586                *p++ = 'U';
 587        if (s->trace)
 588                *p++ = 'T';
 589
 590        *p = 0;
 591        if (show_activity) {
 592                unsigned long total_alloc;
 593                unsigned long total_free;
 594
 595                total_alloc = s->alloc_fastpath + s->alloc_slowpath;
 596                total_free = s->free_fastpath + s->free_slowpath;
 597
 598                printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d %4ld %4ld\n",
 599                        s->name, s->objects,
 600                        total_alloc, total_free,
 601                        total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,
 602                        total_free ? (s->free_fastpath * 100 / total_free) : 0,
 603                        s->order_fallback, s->order, s->cmpxchg_double_fail,
 604                        s->cmpxchg_double_cpu_fail);
 605        }
 606        else
 607                printf("%-21s %8ld %7d %8s %14s %4d %1d %3ld %3ld %s\n",
 608                        s->name, s->objects, s->object_size, size_str, dist_str,
 609                        s->objs_per_slab, s->order,
 610                        s->slabs ? (s->partial * 100) / s->slabs : 100,
 611                        s->slabs ? (s->objects * s->object_size * 100) /
 612                                (s->slabs * (page_size << s->order)) : 100,
 613                        flags);
 614}
 615
 616/*
 617 * Analyze debug options. Return false if something is amiss.
 618 */
 619static int debug_opt_scan(char *opt)
 620{
 621        if (!opt || !opt[0] || strcmp(opt, "-") == 0)
 622                return 1;
 623
 624        if (strcasecmp(opt, "a") == 0) {
 625                sanity = 1;
 626                poison = 1;
 627                redzone = 1;
 628                tracking = 1;
 629                return 1;
 630        }
 631
 632        for ( ; *opt; opt++)
 633                switch (*opt) {
 634                case 'F' : case 'f':
 635                        if (sanity)
 636                                return 0;
 637                        sanity = 1;
 638                        break;
 639                case 'P' : case 'p':
 640                        if (poison)
 641                                return 0;
 642                        poison = 1;
 643                        break;
 644
 645                case 'Z' : case 'z':
 646                        if (redzone)
 647                                return 0;
 648                        redzone = 1;
 649                        break;
 650
 651                case 'U' : case 'u':
 652                        if (tracking)
 653                                return 0;
 654                        tracking = 1;
 655                        break;
 656
 657                case 'T' : case 't':
 658                        if (tracing)
 659                                return 0;
 660                        tracing = 1;
 661                        break;
 662                default:
 663                        return 0;
 664                }
 665        return 1;
 666}
 667
 668static int slab_empty(struct slabinfo *s)
 669{
 670        if (s->objects > 0)
 671                return 0;
 672
 673        /*
 674         * We may still have slabs even if there are no objects. Shrinking will
 675         * remove them.
 676         */
 677        if (s->slabs != 0)
 678                set_obj(s, "shrink", 1);
 679
 680        return 1;
 681}
 682
 683static void slab_debug(struct slabinfo *s)
 684{
 685        if (strcmp(s->name, "*") == 0)
 686                return;
 687
 688        if (sanity && !s->sanity_checks) {
 689                set_obj(s, "sanity", 1);
 690        }
 691        if (!sanity && s->sanity_checks) {
 692                if (slab_empty(s))
 693                        set_obj(s, "sanity", 0);
 694                else
 695                        fprintf(stderr, "%s not empty cannot disable sanity checks\n", s->name);
 696        }
 697        if (redzone && !s->red_zone) {
 698                if (slab_empty(s))
 699                        set_obj(s, "red_zone", 1);
 700                else
 701                        fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
 702        }
 703        if (!redzone && s->red_zone) {
 704                if (slab_empty(s))
 705                        set_obj(s, "red_zone", 0);
 706                else
 707                        fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
 708        }
 709        if (poison && !s->poison) {
 710                if (slab_empty(s))
 711                        set_obj(s, "poison", 1);
 712                else
 713                        fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
 714        }
 715        if (!poison && s->poison) {
 716                if (slab_empty(s))
 717                        set_obj(s, "poison", 0);
 718                else
 719                        fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
 720        }
 721        if (tracking && !s->store_user) {
 722                if (slab_empty(s))
 723                        set_obj(s, "store_user", 1);
 724                else
 725                        fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
 726        }
 727        if (!tracking && s->store_user) {
 728                if (slab_empty(s))
 729                        set_obj(s, "store_user", 0);
 730                else
 731                        fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
 732        }
 733        if (tracing && !s->trace) {
 734                if (slabs == 1)
 735                        set_obj(s, "trace", 1);
 736                else
 737                        fprintf(stderr, "%s can only enable trace for one slab at a time\n", s->name);
 738        }
 739        if (!tracing && s->trace)
 740                set_obj(s, "trace", 1);
 741}
 742
 743static void totals(void)
 744{
 745        struct slabinfo *s;
 746
 747        int used_slabs = 0;
 748        char b1[20], b2[20], b3[20], b4[20];
 749        unsigned long long max = 1ULL << 63;
 750
 751        /* Object size */
 752        unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
 753
 754        /* Number of partial slabs in a slabcache */
 755        unsigned long long min_partial = max, max_partial = 0,
 756                                avg_partial, total_partial = 0;
 757
 758        /* Number of slabs in a slab cache */
 759        unsigned long long min_slabs = max, max_slabs = 0,
 760                                avg_slabs, total_slabs = 0;
 761
 762        /* Size of the whole slab */
 763        unsigned long long min_size = max, max_size = 0,
 764                                avg_size, total_size = 0;
 765
 766        /* Bytes used for object storage in a slab */
 767        unsigned long long min_used = max, max_used = 0,
 768                                avg_used, total_used = 0;
 769
 770        /* Waste: Bytes used for alignment and padding */
 771        unsigned long long min_waste = max, max_waste = 0,
 772                                avg_waste, total_waste = 0;
 773        /* Number of objects in a slab */
 774        unsigned long long min_objects = max, max_objects = 0,
 775                                avg_objects, total_objects = 0;
 776        /* Waste per object */
 777        unsigned long long min_objwaste = max,
 778                                max_objwaste = 0, avg_objwaste,
 779                                total_objwaste = 0;
 780
 781        /* Memory per object */
 782        unsigned long long min_memobj = max,
 783                                max_memobj = 0, avg_memobj,
 784                                total_objsize = 0;
 785
 786        /* Percentage of partial slabs per slab */
 787        unsigned long min_ppart = 100, max_ppart = 0,
 788                                avg_ppart, total_ppart = 0;
 789
 790        /* Number of objects in partial slabs */
 791        unsigned long min_partobj = max, max_partobj = 0,
 792                                avg_partobj, total_partobj = 0;
 793
 794        /* Percentage of partial objects of all objects in a slab */
 795        unsigned long min_ppartobj = 100, max_ppartobj = 0,
 796                                avg_ppartobj, total_ppartobj = 0;
 797
 798
 799        for (s = slabinfo; s < slabinfo + slabs; s++) {
 800                unsigned long long size;
 801                unsigned long used;
 802                unsigned long long wasted;
 803                unsigned long long objwaste;
 804                unsigned long percentage_partial_slabs;
 805                unsigned long percentage_partial_objs;
 806
 807                if (!s->slabs || !s->objects)
 808                        continue;
 809
 810                used_slabs++;
 811
 812                size = slab_size(s);
 813                used = s->objects * s->object_size;
 814                wasted = size - used;
 815                objwaste = s->slab_size - s->object_size;
 816
 817                percentage_partial_slabs = s->partial * 100 / s->slabs;
 818                if (percentage_partial_slabs > 100)
 819                        percentage_partial_slabs = 100;
 820
 821                percentage_partial_objs = s->objects_partial * 100
 822                                                        / s->objects;
 823
 824                if (percentage_partial_objs > 100)
 825                        percentage_partial_objs = 100;
 826
 827                if (s->object_size < min_objsize)
 828                        min_objsize = s->object_size;
 829                if (s->partial < min_partial)
 830                        min_partial = s->partial;
 831                if (s->slabs < min_slabs)
 832                        min_slabs = s->slabs;
 833                if (size < min_size)
 834                        min_size = size;
 835                if (wasted < min_waste)
 836                        min_waste = wasted;
 837                if (objwaste < min_objwaste)
 838                        min_objwaste = objwaste;
 839                if (s->objects < min_objects)
 840                        min_objects = s->objects;
 841                if (used < min_used)
 842                        min_used = used;
 843                if (s->objects_partial < min_partobj)
 844                        min_partobj = s->objects_partial;
 845                if (percentage_partial_slabs < min_ppart)
 846                        min_ppart = percentage_partial_slabs;
 847                if (percentage_partial_objs < min_ppartobj)
 848                        min_ppartobj = percentage_partial_objs;
 849                if (s->slab_size < min_memobj)
 850                        min_memobj = s->slab_size;
 851
 852                if (s->object_size > max_objsize)
 853                        max_objsize = s->object_size;
 854                if (s->partial > max_partial)
 855                        max_partial = s->partial;
 856                if (s->slabs > max_slabs)
 857                        max_slabs = s->slabs;
 858                if (size > max_size)
 859                        max_size = size;
 860                if (wasted > max_waste)
 861                        max_waste = wasted;
 862                if (objwaste > max_objwaste)
 863                        max_objwaste = objwaste;
 864                if (s->objects > max_objects)
 865                        max_objects = s->objects;
 866                if (used > max_used)
 867                        max_used = used;
 868                if (s->objects_partial > max_partobj)
 869                        max_partobj = s->objects_partial;
 870                if (percentage_partial_slabs > max_ppart)
 871                        max_ppart = percentage_partial_slabs;
 872                if (percentage_partial_objs > max_ppartobj)
 873                        max_ppartobj = percentage_partial_objs;
 874                if (s->slab_size > max_memobj)
 875                        max_memobj = s->slab_size;
 876
 877                total_partial += s->partial;
 878                total_slabs += s->slabs;
 879                total_size += size;
 880                total_waste += wasted;
 881
 882                total_objects += s->objects;
 883                total_used += used;
 884                total_partobj += s->objects_partial;
 885                total_ppart += percentage_partial_slabs;
 886                total_ppartobj += percentage_partial_objs;
 887
 888                total_objwaste += s->objects * objwaste;
 889                total_objsize += s->objects * s->slab_size;
 890        }
 891
 892        if (!total_objects) {
 893                printf("No objects\n");
 894                return;
 895        }
 896        if (!used_slabs) {
 897                printf("No slabs\n");
 898                return;
 899        }
 900
 901        /* Per slab averages */
 902        avg_partial = total_partial / used_slabs;
 903        avg_slabs = total_slabs / used_slabs;
 904        avg_size = total_size / used_slabs;
 905        avg_waste = total_waste / used_slabs;
 906
 907        avg_objects = total_objects / used_slabs;
 908        avg_used = total_used / used_slabs;
 909        avg_partobj = total_partobj / used_slabs;
 910        avg_ppart = total_ppart / used_slabs;
 911        avg_ppartobj = total_ppartobj / used_slabs;
 912
 913        /* Per object object sizes */
 914        avg_objsize = total_used / total_objects;
 915        avg_objwaste = total_objwaste / total_objects;
 916        avg_partobj = total_partobj * 100 / total_objects;
 917        avg_memobj = total_objsize / total_objects;
 918
 919        printf("Slabcache Totals\n");
 920        printf("----------------\n");
 921        printf("Slabcaches : %3d      Aliases  : %3d->%-3d Active: %3d\n",
 922                        slabs, aliases, alias_targets, used_slabs);
 923
 924        store_size(b1, total_size);store_size(b2, total_waste);
 925        store_size(b3, total_waste * 100 / total_used);
 926        printf("Memory used: %6s   # Loss   : %6s   MRatio:%6s%%\n", b1, b2, b3);
 927
 928        store_size(b1, total_objects);store_size(b2, total_partobj);
 929        store_size(b3, total_partobj * 100 / total_objects);
 930        printf("# Objects  : %6s   # PartObj: %6s   ORatio:%6s%%\n", b1, b2, b3);
 931
 932        printf("\n");
 933        printf("Per Cache    Average         Min         Max       Total\n");
 934        printf("---------------------------------------------------------\n");
 935
 936        store_size(b1, avg_objects);store_size(b2, min_objects);
 937        store_size(b3, max_objects);store_size(b4, total_objects);
 938        printf("#Objects  %10s  %10s  %10s  %10s\n",
 939                        b1,     b2,     b3,     b4);
 940
 941        store_size(b1, avg_slabs);store_size(b2, min_slabs);
 942        store_size(b3, max_slabs);store_size(b4, total_slabs);
 943        printf("#Slabs    %10s  %10s  %10s  %10s\n",
 944                        b1,     b2,     b3,     b4);
 945
 946        store_size(b1, avg_partial);store_size(b2, min_partial);
 947        store_size(b3, max_partial);store_size(b4, total_partial);
 948        printf("#PartSlab %10s  %10s  %10s  %10s\n",
 949                        b1,     b2,     b3,     b4);
 950        store_size(b1, avg_ppart);store_size(b2, min_ppart);
 951        store_size(b3, max_ppart);
 952        store_size(b4, total_partial * 100  / total_slabs);
 953        printf("%%PartSlab%10s%% %10s%% %10s%% %10s%%\n",
 954                        b1,     b2,     b3,     b4);
 955
 956        store_size(b1, avg_partobj);store_size(b2, min_partobj);
 957        store_size(b3, max_partobj);
 958        store_size(b4, total_partobj);
 959        printf("PartObjs  %10s  %10s  %10s  %10s\n",
 960                        b1,     b2,     b3,     b4);
 961
 962        store_size(b1, avg_ppartobj);store_size(b2, min_ppartobj);
 963        store_size(b3, max_ppartobj);
 964        store_size(b4, total_partobj * 100 / total_objects);
 965        printf("%% PartObj%10s%% %10s%% %10s%% %10s%%\n",
 966                        b1,     b2,     b3,     b4);
 967
 968        store_size(b1, avg_size);store_size(b2, min_size);
 969        store_size(b3, max_size);store_size(b4, total_size);
 970        printf("Memory    %10s  %10s  %10s  %10s\n",
 971                        b1,     b2,     b3,     b4);
 972
 973        store_size(b1, avg_used);store_size(b2, min_used);
 974        store_size(b3, max_used);store_size(b4, total_used);
 975        printf("Used      %10s  %10s  %10s  %10s\n",
 976                        b1,     b2,     b3,     b4);
 977
 978        store_size(b1, avg_waste);store_size(b2, min_waste);
 979        store_size(b3, max_waste);store_size(b4, total_waste);
 980        printf("Loss      %10s  %10s  %10s  %10s\n",
 981                        b1,     b2,     b3,     b4);
 982
 983        printf("\n");
 984        printf("Per Object   Average         Min         Max\n");
 985        printf("---------------------------------------------\n");
 986
 987        store_size(b1, avg_memobj);store_size(b2, min_memobj);
 988        store_size(b3, max_memobj);
 989        printf("Memory    %10s  %10s  %10s\n",
 990                        b1,     b2,     b3);
 991        store_size(b1, avg_objsize);store_size(b2, min_objsize);
 992        store_size(b3, max_objsize);
 993        printf("User      %10s  %10s  %10s\n",
 994                        b1,     b2,     b3);
 995
 996        store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
 997        store_size(b3, max_objwaste);
 998        printf("Loss      %10s  %10s  %10s\n",
 999                        b1,     b2,     b3);
1000}
1001
1002static void sort_slabs(void)
1003{
1004        struct slabinfo *s1,*s2;
1005
1006        for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
1007                for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
1008                        int result;
1009
1010                        if (sort_size)
1011                                result = slab_size(s1) < slab_size(s2);
1012                        else if (sort_active)
1013                                result = slab_activity(s1) < slab_activity(s2);
1014                        else
1015                                result = strcasecmp(s1->name, s2->name);
1016
1017                        if (show_inverted)
1018                                result = -result;
1019
1020                        if (result > 0) {
1021                                struct slabinfo t;
1022
1023                                memcpy(&t, s1, sizeof(struct slabinfo));
1024                                memcpy(s1, s2, sizeof(struct slabinfo));
1025                                memcpy(s2, &t, sizeof(struct slabinfo));
1026                        }
1027                }
1028        }
1029}
1030
1031static void sort_aliases(void)
1032{
1033        struct aliasinfo *a1,*a2;
1034
1035        for (a1 = aliasinfo; a1 < aliasinfo + aliases; a1++) {
1036                for (a2 = a1 + 1; a2 < aliasinfo + aliases; a2++) {
1037                        char *n1, *n2;
1038
1039                        n1 = a1->name;
1040                        n2 = a2->name;
1041                        if (show_alias && !show_inverted) {
1042                                n1 = a1->ref;
1043                                n2 = a2->ref;
1044                        }
1045                        if (strcasecmp(n1, n2) > 0) {
1046                                struct aliasinfo t;
1047
1048                                memcpy(&t, a1, sizeof(struct aliasinfo));
1049                                memcpy(a1, a2, sizeof(struct aliasinfo));
1050                                memcpy(a2, &t, sizeof(struct aliasinfo));
1051                        }
1052                }
1053        }
1054}
1055
1056static void link_slabs(void)
1057{
1058        struct aliasinfo *a;
1059        struct slabinfo *s;
1060
1061        for (a = aliasinfo; a < aliasinfo + aliases; a++) {
1062
1063                for (s = slabinfo; s < slabinfo + slabs; s++)
1064                        if (strcmp(a->ref, s->name) == 0) {
1065                                a->slab = s;
1066                                s->refs++;
1067                                break;
1068                        }
1069                if (s == slabinfo + slabs)
1070                        fatal("Unresolved alias %s\n", a->ref);
1071        }
1072}
1073
1074static void alias(void)
1075{
1076        struct aliasinfo *a;
1077        char *active = NULL;
1078
1079        sort_aliases();
1080        link_slabs();
1081
1082        for(a = aliasinfo; a < aliasinfo + aliases; a++) {
1083
1084                if (!show_single_ref && a->slab->refs == 1)
1085                        continue;
1086
1087                if (!show_inverted) {
1088                        if (active) {
1089                                if (strcmp(a->slab->name, active) == 0) {
1090                                        printf(" %s", a->name);
1091                                        continue;
1092                                }
1093                        }
1094                        printf("\n%-12s <- %s", a->slab->name, a->name);
1095                        active = a->slab->name;
1096                }
1097                else
1098                        printf("%-20s -> %s\n", a->name, a->slab->name);
1099        }
1100        if (active)
1101                printf("\n");
1102}
1103
1104
1105static void rename_slabs(void)
1106{
1107        struct slabinfo *s;
1108        struct aliasinfo *a;
1109
1110        for (s = slabinfo; s < slabinfo + slabs; s++) {
1111                if (*s->name != ':')
1112                        continue;
1113
1114                if (s->refs > 1 && !show_first_alias)
1115                        continue;
1116
1117                a = find_one_alias(s);
1118
1119                if (a)
1120                        s->name = a->name;
1121                else {
1122                        s->name = "*";
1123                        actual_slabs--;
1124                }
1125        }
1126}
1127
1128static int slab_mismatch(char *slab)
1129{
1130        return regexec(&pattern, slab, 0, NULL, 0);
1131}
1132
1133static void read_slab_dir(void)
1134{
1135        DIR *dir;
1136        struct dirent *de;
1137        struct slabinfo *slab = slabinfo;
1138        struct aliasinfo *alias = aliasinfo;
1139        char *p;
1140        char *t;
1141        int count;
1142
1143        if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
1144                fatal("SYSFS support for SLUB not active\n");
1145
1146        dir = opendir(".");
1147        while ((de = readdir(dir))) {
1148                if (de->d_name[0] == '.' ||
1149                        (de->d_name[0] != ':' && slab_mismatch(de->d_name)))
1150                                continue;
1151                switch (de->d_type) {
1152                   case DT_LNK:
1153                        alias->name = strdup(de->d_name);
1154                        count = readlink(de->d_name, buffer, sizeof(buffer)-1);
1155
1156                        if (count < 0)
1157                                fatal("Cannot read symlink %s\n", de->d_name);
1158
1159                        buffer[count] = 0;
1160                        p = buffer + count;
1161                        while (p > buffer && p[-1] != '/')
1162                                p--;
1163                        alias->ref = strdup(p);
1164                        alias++;
1165                        break;
1166                   case DT_DIR:
1167                        if (chdir(de->d_name))
1168                                fatal("Unable to access slab %s\n", slab->name);
1169                        slab->name = strdup(de->d_name);
1170                        slab->alias = 0;
1171                        slab->refs = 0;
1172                        slab->aliases = get_obj("aliases");
1173                        slab->align = get_obj("align");
1174                        slab->cache_dma = get_obj("cache_dma");
1175                        slab->cpu_slabs = get_obj("cpu_slabs");
1176                        slab->destroy_by_rcu = get_obj("destroy_by_rcu");
1177                        slab->hwcache_align = get_obj("hwcache_align");
1178                        slab->object_size = get_obj("object_size");
1179                        slab->objects = get_obj("objects");
1180                        slab->objects_partial = get_obj("objects_partial");
1181                        slab->objects_total = get_obj("objects_total");
1182                        slab->objs_per_slab = get_obj("objs_per_slab");
1183                        slab->order = get_obj("order");
1184                        slab->partial = get_obj("partial");
1185                        slab->partial = get_obj_and_str("partial", &t);
1186                        decode_numa_list(slab->numa_partial, t);
1187                        free(t);
1188                        slab->poison = get_obj("poison");
1189                        slab->reclaim_account = get_obj("reclaim_account");
1190                        slab->red_zone = get_obj("red_zone");
1191                        slab->sanity_checks = get_obj("sanity_checks");
1192                        slab->slab_size = get_obj("slab_size");
1193                        slab->slabs = get_obj_and_str("slabs", &t);
1194                        decode_numa_list(slab->numa, t);
1195                        free(t);
1196                        slab->store_user = get_obj("store_user");
1197                        slab->trace = get_obj("trace");
1198                        slab->alloc_fastpath = get_obj("alloc_fastpath");
1199                        slab->alloc_slowpath = get_obj("alloc_slowpath");
1200                        slab->free_fastpath = get_obj("free_fastpath");
1201                        slab->free_slowpath = get_obj("free_slowpath");
1202                        slab->free_frozen= get_obj("free_frozen");
1203                        slab->free_add_partial = get_obj("free_add_partial");
1204                        slab->free_remove_partial = get_obj("free_remove_partial");
1205                        slab->alloc_from_partial = get_obj("alloc_from_partial");
1206                        slab->alloc_slab = get_obj("alloc_slab");
1207                        slab->alloc_refill = get_obj("alloc_refill");
1208                        slab->free_slab = get_obj("free_slab");
1209                        slab->cpuslab_flush = get_obj("cpuslab_flush");
1210                        slab->deactivate_full = get_obj("deactivate_full");
1211                        slab->deactivate_empty = get_obj("deactivate_empty");
1212                        slab->deactivate_to_head = get_obj("deactivate_to_head");
1213                        slab->deactivate_to_tail = get_obj("deactivate_to_tail");
1214                        slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
1215                        slab->order_fallback = get_obj("order_fallback");
1216                        slab->cmpxchg_double_cpu_fail = get_obj("cmpxchg_double_cpu_fail");
1217                        slab->cmpxchg_double_fail = get_obj("cmpxchg_double_fail");
1218                        slab->cpu_partial_alloc = get_obj("cpu_partial_alloc");
1219                        slab->cpu_partial_free = get_obj("cpu_partial_free");
1220                        slab->alloc_node_mismatch = get_obj("alloc_node_mismatch");
1221                        slab->deactivate_bypass = get_obj("deactivate_bypass");
1222                        chdir("..");
1223                        if (slab->name[0] == ':')
1224                                alias_targets++;
1225                        slab++;
1226                        break;
1227                   default :
1228                        fatal("Unknown file type %lx\n", de->d_type);
1229                }
1230        }
1231        closedir(dir);
1232        slabs = slab - slabinfo;
1233        actual_slabs = slabs;
1234        aliases = alias - aliasinfo;
1235        if (slabs > MAX_SLABS)
1236                fatal("Too many slabs\n");
1237        if (aliases > MAX_ALIASES)
1238                fatal("Too many aliases\n");
1239}
1240
1241static void output_slabs(void)
1242{
1243        struct slabinfo *slab;
1244
1245        for (slab = slabinfo; slab < slabinfo + slabs; slab++) {
1246
1247                if (slab->alias)
1248                        continue;
1249
1250
1251                if (show_numa)
1252                        slab_numa(slab, 0);
1253                else if (show_track)
1254                        show_tracking(slab);
1255                else if (validate)
1256                        slab_validate(slab);
1257                else if (shrink)
1258                        slab_shrink(slab);
1259                else if (set_debug)
1260                        slab_debug(slab);
1261                else if (show_ops)
1262                        ops(slab);
1263                else if (show_slab)
1264                        slabcache(slab);
1265                else if (show_report)
1266                        report(slab);
1267        }
1268}
1269
1270struct option opts[] = {
1271        { "aliases", 0, NULL, 'a' },
1272        { "activity", 0, NULL, 'A' },
1273        { "debug", 2, NULL, 'd' },
1274        { "display-activity", 0, NULL, 'D' },
1275        { "empty", 0, NULL, 'e' },
1276        { "first-alias", 0, NULL, 'f' },
1277        { "help", 0, NULL, 'h' },
1278        { "inverted", 0, NULL, 'i'},
1279        { "numa", 0, NULL, 'n' },
1280        { "ops", 0, NULL, 'o' },
1281        { "report", 0, NULL, 'r' },
1282        { "shrink", 0, NULL, 's' },
1283        { "slabs", 0, NULL, 'l' },
1284        { "track", 0, NULL, 't'},
1285        { "validate", 0, NULL, 'v' },
1286        { "zero", 0, NULL, 'z' },
1287        { "1ref", 0, NULL, '1'},
1288        { NULL, 0, NULL, 0 }
1289};
1290
1291int main(int argc, char *argv[])
1292{
1293        int c;
1294        int err;
1295        char *pattern_source;
1296
1297        page_size = getpagesize();
1298
1299        while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTS",
1300                                                opts, NULL)) != -1)
1301                switch (c) {
1302                case '1':
1303                        show_single_ref = 1;
1304                        break;
1305                case 'a':
1306                        show_alias = 1;
1307                        break;
1308                case 'A':
1309                        sort_active = 1;
1310                        break;
1311                case 'd':
1312                        set_debug = 1;
1313                        if (!debug_opt_scan(optarg))
1314                                fatal("Invalid debug option '%s'\n", optarg);
1315                        break;
1316                case 'D':
1317                        show_activity = 1;
1318                        break;
1319                case 'e':
1320                        show_empty = 1;
1321                        break;
1322                case 'f':
1323                        show_first_alias = 1;
1324                        break;
1325                case 'h':
1326                        usage();
1327                        return 0;
1328                case 'i':
1329                        show_inverted = 1;
1330                        break;
1331                case 'n':
1332                        show_numa = 1;
1333                        break;
1334                case 'o':
1335                        show_ops = 1;
1336                        break;
1337                case 'r':
1338                        show_report = 1;
1339                        break;
1340                case 's':
1341                        shrink = 1;
1342                        break;
1343                case 'l':
1344                        show_slab = 1;
1345                        break;
1346                case 't':
1347                        show_track = 1;
1348                        break;
1349                case 'v':
1350                        validate = 1;
1351                        break;
1352                case 'z':
1353                        skip_zero = 0;
1354                        break;
1355                case 'T':
1356                        show_totals = 1;
1357                        break;
1358                case 'S':
1359                        sort_size = 1;
1360                        break;
1361
1362                default:
1363                        fatal("%s: Invalid option '%c'\n", argv[0], optopt);
1364
1365        }
1366
1367        if (!show_slab && !show_alias && !show_track && !show_report
1368                && !validate && !shrink && !set_debug && !show_ops)
1369                        show_slab = 1;
1370
1371        if (argc > optind)
1372                pattern_source = argv[optind];
1373        else
1374                pattern_source = ".*";
1375
1376        err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
1377        if (err)
1378                fatal("%s: Invalid pattern '%s' code %d\n",
1379                        argv[0], pattern_source, err);
1380        read_slab_dir();
1381        if (show_alias)
1382                alias();
1383        else
1384        if (show_totals)
1385                totals();
1386        else {
1387                link_slabs();
1388                rename_slabs();
1389                sort_slabs();
1390                output_slabs();
1391        }
1392        return 0;
1393}
1394
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