| 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 | |
| 83 | /* Debug options */ |
| 84 | int sanity = 0; |
| 85 | int redzone = 0; |
| 86 | int poison = 0; |
| 87 | int tracking = 0; |
| 88 | int tracing = 0; |
| 89 | |
| 90 | int page_size; |
| 91 | |
| 92 | regex_t pattern; |
| 93 | |
| 94 | static 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 | |
| 104 | static 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 | |
| 138 | static 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 | */ |
| 158 | static unsigned long get_obj(const char *name) |
| 159 | { |
| 160 | if (!read_obj(name)) |
| 161 | return 0; |
| 162 | |
| 163 | return atol(buffer); |
| 164 | } |
| 165 | |
| 166 | static 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 | |
| 185 | static 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 | |
| 199 | static 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 | */ |
| 222 | static 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 | |
| 254 | static 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 | |
| 279 | static void slab_validate(struct slabinfo *s) |
| 280 | { |
| 281 | if (strcmp(s->name, "*") == 0) |
| 282 | return; |
| 283 | |
| 284 | set_obj(s, "validate", 1); |
| 285 | } |
| 286 | |
| 287 | static void slab_shrink(struct slabinfo *s) |
| 288 | { |
| 289 | if (strcmp(s->name, "*") == 0) |
| 290 | return; |
| 291 | |
| 292 | set_obj(s, "shrink", 1); |
| 293 | } |
| 294 | |
| 295 | int line = 0; |
| 296 | |
| 297 | static 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 | */ |
| 309 | static 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 | |
| 325 | static unsigned long slab_size(struct slabinfo *s) |
| 326 | { |
| 327 | return s->slabs * (page_size << s->order); |
| 328 | } |
| 329 | |
| 330 | static 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 | |
| 336 | static 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 | |
| 381 | static 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 | |
| 399 | static 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 | |
| 412 | static const char *onoff(int x) |
| 413 | { |
| 414 | if (x) |
| 415 | return "On "; |
| 416 | return "Off"; |
| 417 | } |
| 418 | |
| 419 | static 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 | s->free_fastpath * 100 / total_free); |
| 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 | s->free_slowpath * 100 / total_free); |
| 445 | printf("Page Alloc %8lu %8lu %3lu %3lu\n", |
| 446 | s->alloc_slab, s->free_slab, |
| 447 | s->alloc_slab * 100 / total_alloc, |
| 448 | s->free_slab * 100 / total_free); |
| 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 | s->free_add_partial * 100 / total_free); |
| 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 | s->free_remove_partial * 100 / total_free); |
| 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 | s->cpu_partial_free * 100 / total_free); |
| 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 | s->free_frozen * 100 / total_free); |
| 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 | |
| 502 | static 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 | |
| 543 | static 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 | */ |
| 619 | static 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 | |
| 668 | static 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 | |
| 683 | static 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 | |
| 743 | static 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 | |
| 1002 | static 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 | |
| 1031 | static 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 | |
| 1056 | static 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 | |
| 1074 | static 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 | |
| 1105 | static 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 | |
| 1128 | static int slab_mismatch(char *slab) |
| 1129 | { |
| 1130 | return regexec(&pattern, slab, 0, NULL, 0); |
| 1131 | } |
| 1132 | |
| 1133 | static 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 | |
| 1241 | static 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 | |
| 1270 | struct 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 | |
| 1291 | int 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 | } |