tools/perf/builtin-kmem.c

   1 #include "builtin.h"
   2 #include "perf.h"
   3
   4 #include "util/util.h"
   5 #include "util/cache.h"
   6 #include "util/symbol.h"
   7 #include "util/thread.h"
   8 #include "util/header.h"
   9 #include "util/session.h"
  10
  11 #include "util/parse-options.h"
  12 #include "util/trace-event.h"
  13
  14 #include "util/debug.h"
  15
  16 #include <linux/rbtree.h>
  17
  18 struct alloc_stat;
  19 typedef int (*sort_fn_t)(struct alloc_stat *, struct alloc_stat *);
  20
  21 static char const               *input_name = "perf.data";
  22
  23 static int                      alloc_flag;
  24 static int                      caller_flag;
  25
  26 static int                      alloc_lines = -1;
  27 static int                      caller_lines = -1;
  28
  29 static bool                     raw_ip;
  30
  31 static char                     default_sort_order[] = "frag,hit,bytes";
  32
  33 static int                      *cpunode_map;
  34 static int                      max_cpu_num;
  35
  36 struct alloc_stat {
  37         u64     call_site;
  38         u64     ptr;
  39         u64     bytes_req;
  40         u64     bytes_alloc;
  41         u32     hit;
  42         u32     pingpong;
  43
  44         short   alloc_cpu;
  45
  46         struct rb_node node;
  47 };
  48
  49 static struct rb_root root_alloc_stat;
  50 static struct rb_root root_alloc_sorted;
  51 static struct rb_root root_caller_stat;
  52 static struct rb_root root_caller_sorted;
  53
  54 static unsigned long total_requested, total_allocated;
  55 static unsigned long nr_allocs, nr_cross_allocs;
  56
  57 #define PATH_SYS_NODE   "/sys/devices/system/node"
  58
  59 static void init_cpunode_map(void)
  60 {
  61         FILE *fp;
  62         int i;
  63
  64         fp = fopen("/sys/devices/system/cpu/kernel_max", "r");
  65         if (!fp) {
  66                 max_cpu_num = 4096;
  67                 return;
  68         }
  69
  70         if (fscanf(fp, "%d", &max_cpu_num) < 1)
  71                 die("Failed to read 'kernel_max' from sysfs");
  72         max_cpu_num++;
  73
  74         cpunode_map = calloc(max_cpu_num, sizeof(int));
  75         if (!cpunode_map)
  76                 die("calloc");
  77         for (i = 0; i < max_cpu_num; i++)
  78                 cpunode_map[i] = -1;
  79         fclose(fp);
  80 }
  81
  82 static void setup_cpunode_map(void)
  83 {
  84         struct dirent *dent1, *dent2;
  85         DIR *dir1, *dir2;
  86         unsigned int cpu, mem;
  87         char buf[PATH_MAX];
  88
  89         init_cpunode_map();
  90
  91         dir1 = opendir(PATH_SYS_NODE);
  92         if (!dir1)
  93                 return;
  94
  95         while ((dent1 = readdir(dir1)) != NULL) {
  96                 if (dent1->d_type != DT_DIR ||
  97                     sscanf(dent1->d_name, "node%u", &mem) < 1)
  98                         continue;
  99
 100                 snprintf(buf, PATH_MAX, "%s/%s", PATH_SYS_NODE, dent1->d_name);
 101                 dir2 = opendir(buf);
 102                 if (!dir2)
 103                         continue;
 104                 while ((dent2 = readdir(dir2)) != NULL) {
 105                         if (dent2->d_type != DT_LNK ||
 106                             sscanf(dent2->d_name, "cpu%u", &cpu) < 1)
 107                                 continue;
 108                         cpunode_map[cpu] = mem;
 109                 }
 110         }
 111 }
 112
 113 static void insert_alloc_stat(unsigned long call_site, unsigned long ptr,
 114                               int bytes_req, int bytes_alloc, int cpu)
 115 {
 116         struct rb_node **node = &root_alloc_stat.rb_node;
 117         struct rb_node *parent = NULL;
 118         struct alloc_stat *data = NULL;
 119
 120         while (*node) {
 121                 parent = *node;
 122                 data = rb_entry(*node, struct alloc_stat, node);
 123
 124                 if (ptr > data->ptr)
 125                         node = &(*node)->rb_right;
 126                 else if (ptr < data->ptr)
 127                         node = &(*node)->rb_left;
 128                 else
 129                         break;
 130         }
 131
 132         if (data && data->ptr == ptr) {
 133                 data->hit++;
 134                 data->bytes_req += bytes_req;
 135                 data->bytes_alloc += bytes_alloc;
 136         } else {
 137                 data = malloc(sizeof(*data));
 138                 if (!data)
 139                         die("malloc");
 140                 data->ptr = ptr;
 141                 data->pingpong = 0;
 142                 data->hit = 1;
 143                 data->bytes_req = bytes_req;
 144                 data->bytes_alloc = bytes_alloc;
 145
 146                 rb_link_node(&data->node, parent, node);
 147                 rb_insert_color(&data->node, &root_alloc_stat);
 148         }
 149         data->call_site = call_site;
 150         data->alloc_cpu = cpu;
 151 }
 152
 153 static void insert_caller_stat(unsigned long call_site,
 154                               int bytes_req, int bytes_alloc)
 155 {
 156         struct rb_node **node = &root_caller_stat.rb_node;
 157         struct rb_node *parent = NULL;
 158         struct alloc_stat *data = NULL;
 159
 160         while (*node) {
 161                 parent = *node;
 162                 data = rb_entry(*node, struct alloc_stat, node);
 163
 164                 if (call_site > data->call_site)
 165                         node = &(*node)->rb_right;
 166                 else if (call_site < data->call_site)
 167                         node = &(*node)->rb_left;
 168                 else
 169                         break;
 170         }
 171
 172         if (data && data->call_site == call_site) {
 173                 data->hit++;
 174                 data->bytes_req += bytes_req;
 175                 data->bytes_alloc += bytes_alloc;
 176         } else {
 177                 data = malloc(sizeof(*data));
 178                 if (!data)
 179                         die("malloc");
 180                 data->call_site = call_site;
 181                 data->pingpong = 0;
 182                 data->hit = 1;
 183                 data->bytes_req = bytes_req;
 184                 data->bytes_alloc = bytes_alloc;
 185
 186                 rb_link_node(&data->node, parent, node);
 187                 rb_insert_color(&data->node, &root_caller_stat);
 188         }
 189 }
 190
 191 static void process_alloc_event(void *data,
 192                                 struct event *event,
 193                                 int cpu,
 194                                 u64 timestamp __used,
 195                                 struct thread *thread __used,
 196                                 int node)
 197 {
 198         unsigned long call_site;
 199         unsigned long ptr;
 200         int bytes_req;
 201         int bytes_alloc;
 202         int node1, node2;
 203
 204         ptr = raw_field_value(event, "ptr", data);
 205         call_site = raw_field_value(event, "call_site", data);
 206         bytes_req = raw_field_value(event, "bytes_req", data);
 207         bytes_alloc = raw_field_value(event, "bytes_alloc", data);
 208
 209         insert_alloc_stat(call_site, ptr, bytes_req, bytes_alloc, cpu);
 210         insert_caller_stat(call_site, bytes_req, bytes_alloc);
 211
 212         total_requested += bytes_req;
 213         total_allocated += bytes_alloc;
 214
 215         if (node) {
 216                 node1 = cpunode_map[cpu];
 217                 node2 = raw_field_value(event, "node", data);
 218                 if (node1 != node2)
 219                         nr_cross_allocs++;
 220         }
 221         nr_allocs++;
 222 }
 223
 224 static int ptr_cmp(struct alloc_stat *, struct alloc_stat *);
 225 static int callsite_cmp(struct alloc_stat *, struct alloc_stat *);
 226
 227 static struct alloc_stat *search_alloc_stat(unsigned long ptr,
 228                                             unsigned long call_site,
 229                                             struct rb_root *root,
 230                                             sort_fn_t sort_fn)
 231 {
 232         struct rb_node *node = root->rb_node;
 233         struct alloc_stat key = { .ptr = ptr, .call_site = call_site };
 234
 235         while (node) {
 236                 struct alloc_stat *data;
 237                 int cmp;
 238
 239                 data = rb_entry(node, struct alloc_stat, node);
 240
 241                 cmp = sort_fn(&key, data);
 242                 if (cmp < 0)
 243                         node = node->rb_left;
 244                 else if (cmp > 0)
 245                         node = node->rb_right;
 246                 else
 247                         return data;
 248         }
 249         return NULL;
 250 }
 251
 252 static void process_free_event(void *data,
 253                                struct event *event,
 254                                int cpu,
 255                                u64 timestamp __used,
 256                                struct thread *thread __used)
 257 {
 258         unsigned long ptr;
 259         struct alloc_stat *s_alloc, *s_caller;
 260
 261         ptr = raw_field_value(event, "ptr", data);
 262
 263         s_alloc = search_alloc_stat(ptr, 0, &root_alloc_stat, ptr_cmp);
 264         if (!s_alloc)
 265                 return;
 266
 267         if (cpu != s_alloc->alloc_cpu) {
 268                 s_alloc->pingpong++;
 269
 270                 s_caller = search_alloc_stat(0, s_alloc->call_site,
 271                                              &root_caller_stat, callsite_cmp);
 272                 assert(s_caller);
 273                 s_caller->pingpong++;
 274         }
 275         s_alloc->alloc_cpu = -1;
 276 }
 277
 278 static void
 279 process_raw_event(event_t *raw_event __used, void *data,
 280                   int cpu, u64 timestamp, struct thread *thread)
 281 {
 282         struct event *event;
 283         int type;
 284
 285         type = trace_parse_common_type(data);
 286         event = trace_find_event(type);
 287
 288         if (!strcmp(event->name, "kmalloc") ||
 289             !strcmp(event->name, "kmem_cache_alloc")) {
 290                 process_alloc_event(data, event, cpu, timestamp, thread, 0);
 291                 return;
 292         }
 293
 294         if (!strcmp(event->name, "kmalloc_node") ||
 295             !strcmp(event->name, "kmem_cache_alloc_node")) {
 296                 process_alloc_event(data, event, cpu, timestamp, thread, 1);
 297                 return;
 298         }
 299
 300         if (!strcmp(event->name, "kfree") ||
 301             !strcmp(event->name, "kmem_cache_free")) {
 302                 process_free_event(data, event, cpu, timestamp, thread);
 303                 return;
 304         }
 305 }
 306
 307 static int process_sample_event(event_t *event, struct sample_data *sample,
 308                                 struct perf_session *session)
 309 {
 310         struct thread *thread = perf_session__findnew(session, event->ip.pid);
 311
 312         if (thread == NULL) {
 313                 pr_debug("problem processing %d event, skipping it.\n",
 314                          event->header.type);
 315                 return -1;
 316         }
 317
 318         dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
 319
 320         process_raw_event(event, sample->raw_data, sample->cpu,
 321                           sample->time, thread);
 322
 323         return 0;
 324 }
 325
 326 static struct perf_event_ops event_ops = {
 327         .sample                 = process_sample_event,
 328         .comm                   = event__process_comm,
 329         .ordered_samples        = true,
 330 };
 331
 332 static double fragmentation(unsigned long n_req, unsigned long n_alloc)
 333 {
 334         if (n_alloc == 0)
 335                 return 0.0;
 336         else
 337                 return 100.0 - (100.0 * n_req / n_alloc);
 338 }
 339
 340 static void __print_result(struct rb_root *root, struct perf_session *session,
 341                            int n_lines, int is_caller)
 342 {
 343         struct rb_node *next;
 344         struct machine *machine;
 345
 346         printf("%.102s\n", graph_dotted_line);
 347         printf(" %-34s |",  is_caller ? "Callsite": "Alloc Ptr");
 348         printf(" Total_alloc/Per | Total_req/Per   | Hit      | Ping-pong | Frag\n");
 349         printf("%.102s\n", graph_dotted_line);
 350
 351         next = rb_first(root);
 352
 353         machine = perf_session__find_host_machine(session);
 354         if (!machine) {
 355                 pr_err("__print_result: couldn't find kernel information\n");
 356                 return;
 357         }
 358         while (next && n_lines--) {
 359                 struct alloc_stat *data = rb_entry(next, struct alloc_stat,
 360                                                    node);
 361                 struct symbol *sym = NULL;
 362                 struct map *map;
 363                 char buf[BUFSIZ];
 364                 u64 addr;
 365
 366                 if (is_caller) {
 367                         addr = data->call_site;
 368                         if (!raw_ip)
 369                                 sym = machine__find_kernel_function(machine, addr, &map, NULL);
 370                 } else
 371                         addr = data->ptr;
 372
 373                 if (sym != NULL)
 374                         snprintf(buf, sizeof(buf), "%s+%" PRIx64 "", sym->name,
 375                                  addr - map->unmap_ip(map, sym->start));
 376                 else
 377                         snprintf(buf, sizeof(buf), "%#" PRIx64 "", addr);
 378                 printf(" %-34s |", buf);
 379
 380                 printf(" %9llu/%-5lu | %9llu/%-5lu | %8lu | %8lu | %6.3f%%\n",
 381                        (unsigned long long)data->bytes_alloc,
 382                        (unsigned long)data->bytes_alloc / data->hit,
 383                        (unsigned long long)data->bytes_req,
 384                        (unsigned long)data->bytes_req / data->hit,
 385                        (unsigned long)data->hit,
 386                        (unsigned long)data->pingpong,
 387                        fragmentation(data->bytes_req, data->bytes_alloc));
 388
 389                 next = rb_next(next);
 390         }
 391
 392         if (n_lines == -1)
 393                 printf(" ...                                | ...             | ...             | ...    | ...      | ...   \n");
 394
 395         printf("%.102s\n", graph_dotted_line);
 396 }
 397
 398 static void print_summary(void)
 399 {
 400         printf("\nSUMMARY\n=======\n");
 401         printf("Total bytes requested: %lu\n", total_requested);
 402         printf("Total bytes allocated: %lu\n", total_allocated);
 403         printf("Total bytes wasted on internal fragmentation: %lu\n",
 404                total_allocated - total_requested);
 405         printf("Internal fragmentation: %f%%\n",
 406                fragmentation(total_requested, total_allocated));
 407         printf("Cross CPU allocations: %lu/%lu\n", nr_cross_allocs, nr_allocs);
 408 }
 409
 410 static void print_result(struct perf_session *session)
 411 {
 412         if (caller_flag)
 413                 __print_result(&root_caller_sorted, session, caller_lines, 1);
 414         if (alloc_flag)
 415                 __print_result(&root_alloc_sorted, session, alloc_lines, 0);
 416         print_summary();
 417 }
 418
 419 struct sort_dimension {
 420         const char              name[20];
 421         sort_fn_t               cmp;
 422         struct list_head        list;
 423 };
 424
 425 static LIST_HEAD(caller_sort);
 426 static LIST_HEAD(alloc_sort);
 427
 428 static void sort_insert(struct rb_root *root, struct alloc_stat *data,
 429                         struct list_head *sort_list)
 430 {
 431         struct rb_node **new = &(root->rb_node);
 432         struct rb_node *parent = NULL;
 433         struct sort_dimension *sort;
 434
 435         while (*new) {
 436                 struct alloc_stat *this;
 437                 int cmp = 0;
 438
 439                 this = rb_entry(*new, struct alloc_stat, node);
 440                 parent = *new;
 441
 442                 list_for_each_entry(sort, sort_list, list) {
 443                         cmp = sort->cmp(data, this);
 444                         if (cmp)
 445                                 break;
 446                 }
 447
 448                 if (cmp > 0)
 449                         new = &((*new)->rb_left);
 450                 else
 451                         new = &((*new)->rb_right);
 452         }
 453
 454         rb_link_node(&data->node, parent, new);
 455         rb_insert_color(&data->node, root);
 456 }
 457
 458 static void __sort_result(struct rb_root *root, struct rb_root *root_sorted,
 459                           struct list_head *sort_list)
 460 {
 461         struct rb_node *node;
 462         struct alloc_stat *data;
 463
 464         for (;;) {
 465                 node = rb_first(root);
 466                 if (!node)
 467                         break;
 468
 469                 rb_erase(node, root);
 470                 data = rb_entry(node, struct alloc_stat, node);
 471                 sort_insert(root_sorted, data, sort_list);
 472         }
 473 }
 474
 475 static void sort_result(void)
 476 {
 477         __sort_result(&root_alloc_stat, &root_alloc_sorted, &alloc_sort);
 478         __sort_result(&root_caller_stat, &root_caller_sorted, &caller_sort);
 479 }
 480
 481 static int __cmd_kmem(void)
 482 {
 483         int err = -EINVAL;
 484         struct perf_session *session = perf_session__new(input_name, O_RDONLY,
 485                                                          0, false, &event_ops);
 486         if (session == NULL)
 487                 return -ENOMEM;
 488
 489         if (perf_session__create_kernel_maps(session) < 0)
 490                 goto out_delete;
 491
 492         if (!perf_session__has_traces(session, "kmem record"))
 493                 goto out_delete;
 494
 495         setup_pager();
 496         err = perf_session__process_events(session, &event_ops);
 497         if (err != 0)
 498                 goto out_delete;
 499         sort_result();
 500         print_result(session);
 501 out_delete:
 502         perf_session__delete(session);
 503         return err;
 504 }
 505
 506 static const char * const kmem_usage[] = {
 507         "perf kmem [<options>] {record|stat}",
 508         NULL
 509 };
 510
 511 static int ptr_cmp(struct alloc_stat *l, struct alloc_stat *r)
 512 {
 513         if (l->ptr < r->ptr)
 514                 return -1;
 515         else if (l->ptr > r->ptr)
 516                 return 1;
 517         return 0;
 518 }
 519
 520 static struct sort_dimension ptr_sort_dimension = {
 521         .name   = "ptr",
 522         .cmp    = ptr_cmp,
 523 };
 524
 525 static int callsite_cmp(struct alloc_stat *l, struct alloc_stat *r)
 526 {
 527         if (l->call_site < r->call_site)
 528                 return -1;
 529         else if (l->call_site > r->call_site)
 530                 return 1;
 531         return 0;
 532 }
 533
 534 static struct sort_dimension callsite_sort_dimension = {
 535         .name   = "callsite",
 536         .cmp    = callsite_cmp,
 537 };
 538
 539 static int hit_cmp(struct alloc_stat *l, struct alloc_stat *r)
 540 {
 541         if (l->hit < r->hit)
 542                 return -1;
 543         else if (l->hit > r->hit)
 544                 return 1;
 545         return 0;
 546 }
 547
 548 static struct sort_dimension hit_sort_dimension = {
 549         .name   = "hit",
 550         .cmp    = hit_cmp,
 551 };
 552
 553 static int bytes_cmp(struct alloc_stat *l, struct alloc_stat *r)
 554 {
 555         if (l->bytes_alloc < r->bytes_alloc)
 556                 return -1;
 557         else if (l->bytes_alloc > r->bytes_alloc)
 558                 return 1;
 559         return 0;
 560 }
 561
 562 static struct sort_dimension bytes_sort_dimension = {
 563         .name   = "bytes",
 564         .cmp    = bytes_cmp,
 565 };
 566
 567 static int frag_cmp(struct alloc_stat *l, struct alloc_stat *r)
 568 {
 569         double x, y;
 570
 571         x = fragmentation(l->bytes_req, l->bytes_alloc);
 572         y = fragmentation(r->bytes_req, r->bytes_alloc);
 573
 574         if (x < y)
 575                 return -1;
 576         else if (x > y)
 577                 return 1;
 578         return 0;
 579 }
 580
 581 static struct sort_dimension frag_sort_dimension = {
 582         .name   = "frag",
 583         .cmp    = frag_cmp,
 584 };
 585
 586 static int pingpong_cmp(struct alloc_stat *l, struct alloc_stat *r)
 587 {
 588         if (l->pingpong < r->pingpong)
 589                 return -1;
 590         else if (l->pingpong > r->pingpong)
 591                 return 1;
 592         return 0;
 593 }
 594
 595 static struct sort_dimension pingpong_sort_dimension = {
 596         .name   = "pingpong",
 597         .cmp    = pingpong_cmp,
 598 };
 599
 600 static struct sort_dimension *avail_sorts[] = {
 601         &ptr_sort_dimension,
 602         &callsite_sort_dimension,
 603         &hit_sort_dimension,
 604         &bytes_sort_dimension,
 605         &frag_sort_dimension,
 606         &pingpong_sort_dimension,
 607 };
 608
 609 #define NUM_AVAIL_SORTS \
 610         (int)(sizeof(avail_sorts) / sizeof(struct sort_dimension *))
 611
 612 static int sort_dimension__add(const char *tok, struct list_head *list)
 613 {
 614         struct sort_dimension *sort;
 615         int i;
 616
 617         for (i = 0; i < NUM_AVAIL_SORTS; i++) {
 618                 if (!strcmp(avail_sorts[i]->name, tok)) {
 619                         sort = malloc(sizeof(*sort));
 620                         if (!sort)
 621                                 die("malloc");
 622                         memcpy(sort, avail_sorts[i], sizeof(*sort));
 623                         list_add_tail(&sort->list, list);
 624                         return 0;
 625                 }
 626         }
 627
 628         return -1;
 629 }
 630
 631 static int setup_sorting(struct list_head *sort_list, const char *arg)
 632 {
 633         char *tok;
 634         char *str = strdup(arg);
 635
 636         if (!str)
 637                 die("strdup");
 638
 639         while (true) {
 640                 tok = strsep(&str, ",");
 641                 if (!tok)
 642                         break;
 643                 if (sort_dimension__add(tok, sort_list) < 0) {
 644                         error("Unknown --sort key: '%s'", tok);
 645                         return -1;
 646                 }
 647         }
 648
 649         free(str);
 650         return 0;
 651 }
 652
 653 static int parse_sort_opt(const struct option *opt __used,
 654                           const char *arg, int unset __used)
 655 {
 656         if (!arg)
 657                 return -1;
 658
 659         if (caller_flag > alloc_flag)
 660                 return setup_sorting(&caller_sort, arg);
 661         else
 662                 return setup_sorting(&alloc_sort, arg);
 663
 664         return 0;
 665 }
 666
 667 static int parse_caller_opt(const struct option *opt __used,
 668                           const char *arg __used, int unset __used)
 669 {
 670         caller_flag = (alloc_flag + 1);
 671         return 0;
 672 }
 673
 674 static int parse_alloc_opt(const struct option *opt __used,
 675                           const char *arg __used, int unset __used)
 676 {
 677         alloc_flag = (caller_flag + 1);
 678         return 0;
 679 }
 680
 681 static int parse_line_opt(const struct option *opt __used,
 682                           const char *arg, int unset __used)
 683 {
 684         int lines;
 685
 686         if (!arg)
 687                 return -1;
 688
 689         lines = strtoul(arg, NULL, 10);
 690
 691         if (caller_flag > alloc_flag)
 692                 caller_lines = lines;
 693         else
 694                 alloc_lines = lines;
 695
 696         return 0;
 697 }
 698
 699 static const struct option kmem_options[] = {
 700         OPT_STRING('i', "input", &input_name, "file",
 701                    "input file name"),
 702         OPT_CALLBACK_NOOPT(0, "caller", NULL, NULL,
 703                            "show per-callsite statistics",
 704                            parse_caller_opt),
 705         OPT_CALLBACK_NOOPT(0, "alloc", NULL, NULL,
 706                            "show per-allocation statistics",
 707                            parse_alloc_opt),
 708         OPT_CALLBACK('s', "sort", NULL, "key[,key2...]",
 709                      "sort by keys: ptr, call_site, bytes, hit, pingpong, frag",
 710                      parse_sort_opt),
 711         OPT_CALLBACK('l', "line", NULL, "num",
 712                      "show n lines",
 713                      parse_line_opt),
 714         OPT_BOOLEAN(0, "raw-ip", &raw_ip, "show raw ip instead of symbol"),
 715         OPT_END()
 716 };
 717
 718 static const char *record_args[] = {
 719         "record",
 720         "-a",
 721         "-R",
 722         "-f",
 723         "-c", "1",
 724         "-e", "kmem:kmalloc",
 725         "-e", "kmem:kmalloc_node",
 726         "-e", "kmem:kfree",
 727         "-e", "kmem:kmem_cache_alloc",
 728         "-e", "kmem:kmem_cache_alloc_node",
 729         "-e", "kmem:kmem_cache_free",
 730 };
 731
 732 static int __cmd_record(int argc, const char **argv)
 733 {
 734         unsigned int rec_argc, i, j;
 735         const char **rec_argv;
 736
 737         rec_argc = ARRAY_SIZE(record_args) + argc - 1;
 738         rec_argv = calloc(rec_argc + 1, sizeof(char *));
 739
 740         if (rec_argv == NULL)
 741                 return -ENOMEM;
 742
 743         for (i = 0; i < ARRAY_SIZE(record_args); i++)
 744                 rec_argv[i] = strdup(record_args[i]);
 745
 746         for (j = 1; j < (unsigned int)argc; j++, i++)
 747                 rec_argv[i] = argv[j];
 748
 749         return cmd_record(i, rec_argv, NULL);
 750 }
 751
 752 int cmd_kmem(int argc, const char **argv, const char *prefix __used)
 753 {
 754         argc = parse_options(argc, argv, kmem_options, kmem_usage, 0);
 755
 756         if (!argc)
 757                 usage_with_options(kmem_usage, kmem_options);
 758
 759         symbol__init();
 760
 761         if (!strncmp(argv[0], "rec", 3)) {
 762                 return __cmd_record(argc, argv);
 763         } else if (!strcmp(argv[0], "stat")) {
 764                 setup_cpunode_map();
 765
 766                 if (list_empty(&caller_sort))
 767                         setup_sorting(&caller_sort, default_sort_order);
 768                 if (list_empty(&alloc_sort))
 769                         setup_sorting(&alloc_sort, default_sort_order);
 770
 771                 return __cmd_kmem();
 772         } else
 773                 usage_with_options(kmem_usage, kmem_options);
 774
 775         return 0;
 776 }
 777