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 #include "util/tool.h"
  11
  12 #include "util/parse-options.h"
  13 #include "util/trace-event.h"
  14
  15 #include "util/debug.h"
  16
  17 #include <linux/rbtree.h>
  18
  19 struct alloc_stat;
  20 typedef int (*sort_fn_t)(struct alloc_stat *, struct alloc_stat *);
  21
  22 static const char               *input_name;
  23
  24 static int                      alloc_flag;
  25 static int                      caller_flag;
  26
  27 static int                      alloc_lines = -1;
  28 static int                      caller_lines = -1;
  29
  30 static bool                     raw_ip;
  31
  32 static char                     default_sort_order[] = "frag,hit,bytes";
  33
  34 static int                      *cpunode_map;
  35 static int                      max_cpu_num;
  36
  37 struct alloc_stat {
  38         u64     call_site;
  39         u64     ptr;
  40         u64     bytes_req;
  41         u64     bytes_alloc;
  42         u32     hit;
  43         u32     pingpong;
  44
  45         short   alloc_cpu;
  46
  47         struct rb_node node;
  48 };
  49
  50 static struct rb_root root_alloc_stat;
  51 static struct rb_root root_alloc_sorted;
  52 static struct rb_root root_caller_stat;
  53 static struct rb_root root_caller_sorted;
  54
  55 static unsigned long total_requested, total_allocated;
  56 static unsigned long nr_allocs, nr_cross_allocs;
  57
  58 #define PATH_SYS_NODE   "/sys/devices/system/node"
  59
  60 static void init_cpunode_map(void)
  61 {
  62         FILE *fp;
  63         int i;
  64
  65         fp = fopen("/sys/devices/system/cpu/kernel_max", "r");
  66         if (!fp) {
  67                 max_cpu_num = 4096;
  68                 return;
  69         }
  70
  71         if (fscanf(fp, "%d", &max_cpu_num) < 1)
  72                 die("Failed to read 'kernel_max' from sysfs");
  73         max_cpu_num++;
  74
  75         cpunode_map = calloc(max_cpu_num, sizeof(int));
  76         if (!cpunode_map)
  77                 die("calloc");
  78         for (i = 0; i < max_cpu_num; i++)
  79                 cpunode_map[i] = -1;
  80         fclose(fp);
  81 }
  82
  83 static void setup_cpunode_map(void)
  84 {
  85         struct dirent *dent1, *dent2;
  86         DIR *dir1, *dir2;
  87         unsigned int cpu, mem;
  88         char buf[PATH_MAX];
  89
  90         init_cpunode_map();
  91
  92         dir1 = opendir(PATH_SYS_NODE);
  93         if (!dir1)
  94                 return;
  95
  96         while ((dent1 = readdir(dir1)) != NULL) {
  97                 if (dent1->d_type != DT_DIR ||
  98                     sscanf(dent1->d_name, "node%u", &mem) < 1)
  99                         continue;
 100
 101                 snprintf(buf, PATH_MAX, "%s/%s", PATH_SYS_NODE, dent1->d_name);
 102                 dir2 = opendir(buf);
 103                 if (!dir2)
 104                         continue;
 105                 while ((dent2 = readdir(dir2)) != NULL) {
 106                         if (dent2->d_type != DT_LNK ||
 107                             sscanf(dent2->d_name, "cpu%u", &cpu) < 1)
 108                                 continue;
 109                         cpunode_map[cpu] = mem;
 110                 }
 111                 closedir(dir2);
 112         }
 113         closedir(dir1);
 114 }
 115
 116 static void insert_alloc_stat(unsigned long call_site, unsigned long ptr,
 117                               int bytes_req, int bytes_alloc, int cpu)
 118 {
 119         struct rb_node **node = &root_alloc_stat.rb_node;
 120         struct rb_node *parent = NULL;
 121         struct alloc_stat *data = NULL;
 122
 123         while (*node) {
 124                 parent = *node;
 125                 data = rb_entry(*node, struct alloc_stat, node);
 126
 127                 if (ptr > data->ptr)
 128                         node = &(*node)->rb_right;
 129                 else if (ptr < data->ptr)
 130                         node = &(*node)->rb_left;
 131                 else
 132                         break;
 133         }
 134
 135         if (data && data->ptr == ptr) {
 136                 data->hit++;
 137                 data->bytes_req += bytes_req;
 138                 data->bytes_alloc += bytes_alloc;
 139         } else {
 140                 data = malloc(sizeof(*data));
 141                 if (!data)
 142                         die("malloc");
 143                 data->ptr = ptr;
 144                 data->pingpong = 0;
 145                 data->hit = 1;
 146                 data->bytes_req = bytes_req;
 147                 data->bytes_alloc = bytes_alloc;
 148
 149                 rb_link_node(&data->node, parent, node);
 150                 rb_insert_color(&data->node, &root_alloc_stat);
 151         }
 152         data->call_site = call_site;
 153         data->alloc_cpu = cpu;
 154 }
 155
 156 static void insert_caller_stat(unsigned long call_site,
 157                               int bytes_req, int bytes_alloc)
 158 {
 159         struct rb_node **node = &root_caller_stat.rb_node;
 160         struct rb_node *parent = NULL;
 161         struct alloc_stat *data = NULL;
 162
 163         while (*node) {
 164                 parent = *node;
 165                 data = rb_entry(*node, struct alloc_stat, node);
 166
 167                 if (call_site > data->call_site)
 168                         node = &(*node)->rb_right;
 169                 else if (call_site < data->call_site)
 170                         node = &(*node)->rb_left;
 171                 else
 172                         break;
 173         }
 174
 175         if (data && data->call_site == call_site) {
 176                 data->hit++;
 177                 data->bytes_req += bytes_req;
 178                 data->bytes_alloc += bytes_alloc;
 179         } else {
 180                 data = malloc(sizeof(*data));
 181                 if (!data)
 182                         die("malloc");
 183                 data->call_site = call_site;
 184                 data->pingpong = 0;
 185                 data->hit = 1;
 186                 data->bytes_req = bytes_req;
 187                 data->bytes_alloc = bytes_alloc;
 188
 189                 rb_link_node(&data->node, parent, node);
 190                 rb_insert_color(&data->node, &root_caller_stat);
 191         }
 192 }
 193
 194 static void process_alloc_event(void *data,
 195                                 struct event_format *event,
 196                                 int cpu,
 197                                 u64 timestamp __used,
 198                                 struct thread *thread __used,
 199                                 int node)
 200 {
 201         unsigned long call_site;
 202         unsigned long ptr;
 203         int bytes_req;
 204         int bytes_alloc;
 205         int node1, node2;
 206
 207         ptr = raw_field_value(event, "ptr", data);
 208         call_site = raw_field_value(event, "call_site", data);
 209         bytes_req = raw_field_value(event, "bytes_req", data);
 210         bytes_alloc = raw_field_value(event, "bytes_alloc", data);
 211
 212         insert_alloc_stat(call_site, ptr, bytes_req, bytes_alloc, cpu);
 213         insert_caller_stat(call_site, bytes_req, bytes_alloc);
 214
 215         total_requested += bytes_req;
 216         total_allocated += bytes_alloc;
 217
 218         if (node) {
 219                 node1 = cpunode_map[cpu];
 220                 node2 = raw_field_value(event, "node", data);
 221                 if (node1 != node2)
 222                         nr_cross_allocs++;
 223         }
 224         nr_allocs++;
 225 }
 226
 227 static int ptr_cmp(struct alloc_stat *, struct alloc_stat *);
 228 static int callsite_cmp(struct alloc_stat *, struct alloc_stat *);
 229
 230 static struct alloc_stat *search_alloc_stat(unsigned long ptr,
 231                                             unsigned long call_site,
 232                                             struct rb_root *root,
 233                                             sort_fn_t sort_fn)
 234 {
 235         struct rb_node *node = root->rb_node;
 236         struct alloc_stat key = { .ptr = ptr, .call_site = call_site };
 237
 238         while (node) {
 239                 struct alloc_stat *data;
 240                 int cmp;
 241
 242                 data = rb_entry(node, struct alloc_stat, node);
 243
 244                 cmp = sort_fn(&key, data);
 245                 if (cmp < 0)
 246                         node = node->rb_left;
 247                 else if (cmp > 0)
 248                         node = node->rb_right;
 249                 else
 250                         return data;
 251         }
 252         return NULL;
 253 }
 254
 255 static void process_free_event(void *data,
 256                                struct event_format *event,
 257                                int cpu,
 258                                u64 timestamp __used,
 259                                struct thread *thread __used)
 260 {
 261         unsigned long ptr;
 262         struct alloc_stat *s_alloc, *s_caller;
 263
 264         ptr = raw_field_value(event, "ptr", data);
 265
 266         s_alloc = search_alloc_stat(ptr, 0, &root_alloc_stat, ptr_cmp);
 267         if (!s_alloc)
 268                 return;
 269
 270         if (cpu != s_alloc->alloc_cpu) {
 271                 s_alloc->pingpong++;
 272
 273                 s_caller = search_alloc_stat(0, s_alloc->call_site,
 274                                              &root_caller_stat, callsite_cmp);
 275                 assert(s_caller);
 276                 s_caller->pingpong++;
 277         }
 278         s_alloc->alloc_cpu = -1;
 279 }
 280
 281 static void process_raw_event(union perf_event *raw_event __used, void *data,
 282                               int cpu, u64 timestamp, struct thread *thread)
 283 {
 284         struct event_format *event;
 285         int type;
 286
 287         type = trace_parse_common_type(data);
 288         event = trace_find_event(type);
 289
 290         if (!strcmp(event->name, "kmalloc") ||
 291             !strcmp(event->name, "kmem_cache_alloc")) {
 292                 process_alloc_event(data, event, cpu, timestamp, thread, 0);
 293                 return;
 294         }
 295
 296         if (!strcmp(event->name, "kmalloc_node") ||
 297             !strcmp(event->name, "kmem_cache_alloc_node")) {
 298                 process_alloc_event(data, event, cpu, timestamp, thread, 1);
 299                 return;
 300         }
 301
 302         if (!strcmp(event->name, "kfree") ||
 303             !strcmp(event->name, "kmem_cache_free")) {
 304                 process_free_event(data, event, cpu, timestamp, thread);
 305                 return;
 306         }
 307 }
 308
 309 static int process_sample_event(struct perf_tool *tool __used,
 310                                 union perf_event *event,
 311                                 struct perf_sample *sample,
 312                                 struct perf_evsel *evsel __used,
 313                                 struct machine *machine)
 314 {
 315         struct thread *thread = machine__findnew_thread(machine, event->ip.pid);
 316
 317         if (thread == NULL) {
 318                 pr_debug("problem processing %d event, skipping it.\n",
 319                          event->header.type);
 320                 return -1;
 321         }
 322
 323         dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
 324
 325         process_raw_event(event, sample->raw_data, sample->cpu,
 326                           sample->time, thread);
 327
 328         return 0;
 329 }
 330
 331 static struct perf_tool perf_kmem = {
 332         .sample                 = process_sample_event,
 333         .comm                   = perf_event__process_comm,
 334         .ordered_samples        = true,
 335 };
 336
 337 static double fragmentation(unsigned long n_req, unsigned long n_alloc)
 338 {
 339         if (n_alloc == 0)
 340                 return 0.0;
 341         else
 342                 return 100.0 - (100.0 * n_req / n_alloc);
 343 }
 344
 345 static void __print_result(struct rb_root *root, struct perf_session *session,
 346                            int n_lines, int is_caller)
 347 {
 348         struct rb_node *next;
 349         struct machine *machine;
 350
 351         printf("%.102s\n", graph_dotted_line);
 352         printf(" %-34s |",  is_caller ? "Callsite": "Alloc Ptr");
 353         printf(" Total_alloc/Per | Total_req/Per   | Hit      | Ping-pong | Frag\n");
 354         printf("%.102s\n", graph_dotted_line);
 355
 356         next = rb_first(root);
 357
 358         machine = perf_session__find_host_machine(session);
 359         if (!machine) {
 360                 pr_err("__print_result: couldn't find kernel information\n");
 361                 return;
 362         }
 363         while (next && n_lines--) {
 364                 struct alloc_stat *data = rb_entry(next, struct alloc_stat,
 365                                                    node);
 366                 struct symbol *sym = NULL;
 367                 struct map *map;
 368                 char buf[BUFSIZ];
 369                 u64 addr;
 370
 371                 if (is_caller) {
 372                         addr = data->call_site;
 373                         if (!raw_ip)
 374                                 sym = machine__find_kernel_function(machine, addr, &map, NULL);
 375                 } else
 376                         addr = data->ptr;
 377
 378                 if (sym != NULL)
 379                         snprintf(buf, sizeof(buf), "%s+%" PRIx64 "", sym->name,
 380                                  addr - map->unmap_ip(map, sym->start));
 381                 else
 382                         snprintf(buf, sizeof(buf), "%#" PRIx64 "", addr);
 383                 printf(" %-34s |", buf);
 384
 385                 printf(" %9llu/%-5lu | %9llu/%-5lu | %8lu | %8lu | %6.3f%%\n",
 386                        (unsigned long long)data->bytes_alloc,
 387                        (unsigned long)data->bytes_alloc / data->hit,
 388                        (unsigned long long)data->bytes_req,
 389                        (unsigned long)data->bytes_req / data->hit,
 390                        (unsigned long)data->hit,
 391                        (unsigned long)data->pingpong,
 392                        fragmentation(data->bytes_req, data->bytes_alloc));
 393
 394                 next = rb_next(next);
 395         }
 396
 397         if (n_lines == -1)
 398                 printf(" ...                                | ...             | ...             | ...    | ...      | ...   \n");
 399
 400         printf("%.102s\n", graph_dotted_line);
 401 }
 402
 403 static void print_summary(void)
 404 {
 405         printf("\nSUMMARY\n=======\n");
 406         printf("Total bytes requested: %lu\n", total_requested);
 407         printf("Total bytes allocated: %lu\n", total_allocated);
 408         printf("Total bytes wasted on internal fragmentation: %lu\n",
 409                total_allocated - total_requested);
 410         printf("Internal fragmentation: %f%%\n",
 411                fragmentation(total_requested, total_allocated));
 412         printf("Cross CPU allocations: %lu/%lu\n", nr_cross_allocs, nr_allocs);
 413 }
 414
 415 static void print_result(struct perf_session *session)
 416 {
 417         if (caller_flag)
 418                 __print_result(&root_caller_sorted, session, caller_lines, 1);
 419         if (alloc_flag)
 420                 __print_result(&root_alloc_sorted, session, alloc_lines, 0);
 421         print_summary();
 422 }
 423
 424 struct sort_dimension {
 425         const char              name[20];
 426         sort_fn_t               cmp;
 427         struct list_head        list;
 428 };
 429
 430 static LIST_HEAD(caller_sort);
 431 static LIST_HEAD(alloc_sort);
 432
 433 static void sort_insert(struct rb_root *root, struct alloc_stat *data,
 434                         struct list_head *sort_list)
 435 {
 436         struct rb_node **new = &(root->rb_node);
 437         struct rb_node *parent = NULL;
 438         struct sort_dimension *sort;
 439
 440         while (*new) {
 441                 struct alloc_stat *this;
 442                 int cmp = 0;
 443
 444                 this = rb_entry(*new, struct alloc_stat, node);
 445                 parent = *new;
 446
 447                 list_for_each_entry(sort, sort_list, list) {
 448                         cmp = sort->cmp(data, this);
 449                         if (cmp)
 450                                 break;
 451                 }
 452
 453                 if (cmp > 0)
 454                         new = &((*new)->rb_left);
 455                 else
 456                         new = &((*new)->rb_right);
 457         }
 458
 459         rb_link_node(&data->node, parent, new);
 460         rb_insert_color(&data->node, root);
 461 }
 462
 463 static void __sort_result(struct rb_root *root, struct rb_root *root_sorted,
 464                           struct list_head *sort_list)
 465 {
 466         struct rb_node *node;
 467         struct alloc_stat *data;
 468
 469         for (;;) {
 470                 node = rb_first(root);
 471                 if (!node)
 472                         break;
 473
 474                 rb_erase(node, root);
 475                 data = rb_entry(node, struct alloc_stat, node);
 476                 sort_insert(root_sorted, data, sort_list);
 477         }
 478 }
 479
 480 static void sort_result(void)
 481 {
 482         __sort_result(&root_alloc_stat, &root_alloc_sorted, &alloc_sort);
 483         __sort_result(&root_caller_stat, &root_caller_sorted, &caller_sort);
 484 }
 485
 486 static int __cmd_kmem(void)
 487 {
 488         int err = -EINVAL;
 489         struct perf_session *session = perf_session__new(input_name, O_RDONLY,
 490                                                          0, false, &perf_kmem);
 491         if (session == NULL)
 492                 return -ENOMEM;
 493
 494         if (perf_session__create_kernel_maps(session) < 0)
 495                 goto out_delete;
 496
 497         if (!perf_session__has_traces(session, "kmem record"))
 498                 goto out_delete;
 499
 500         setup_pager();
 501         err = perf_session__process_events(session, &perf_kmem);
 502         if (err != 0)
 503                 goto out_delete;
 504         sort_result();
 505         print_result(session);
 506 out_delete:
 507         perf_session__delete(session);
 508         return err;
 509 }
 510
 511 static const char * const kmem_usage[] = {
 512         "perf kmem [<options>] {record|stat}",
 513         NULL
 514 };
 515
 516 static int ptr_cmp(struct alloc_stat *l, struct alloc_stat *r)
 517 {
 518         if (l->ptr < r->ptr)
 519                 return -1;
 520         else if (l->ptr > r->ptr)
 521                 return 1;
 522         return 0;
 523 }
 524
 525 static struct sort_dimension ptr_sort_dimension = {
 526         .name   = "ptr",
 527         .cmp    = ptr_cmp,
 528 };
 529
 530 static int callsite_cmp(struct alloc_stat *l, struct alloc_stat *r)
 531 {
 532         if (l->call_site < r->call_site)
 533                 return -1;
 534         else if (l->call_site > r->call_site)
 535                 return 1;
 536         return 0;
 537 }
 538
 539 static struct sort_dimension callsite_sort_dimension = {
 540         .name   = "callsite",
 541         .cmp    = callsite_cmp,
 542 };
 543
 544 static int hit_cmp(struct alloc_stat *l, struct alloc_stat *r)
 545 {
 546         if (l->hit < r->hit)
 547                 return -1;
 548         else if (l->hit > r->hit)
 549                 return 1;
 550         return 0;
 551 }
 552
 553 static struct sort_dimension hit_sort_dimension = {
 554         .name   = "hit",
 555         .cmp    = hit_cmp,
 556 };
 557
 558 static int bytes_cmp(struct alloc_stat *l, struct alloc_stat *r)
 559 {
 560         if (l->bytes_alloc < r->bytes_alloc)
 561                 return -1;
 562         else if (l->bytes_alloc > r->bytes_alloc)
 563                 return 1;
 564         return 0;
 565 }
 566
 567 static struct sort_dimension bytes_sort_dimension = {
 568         .name   = "bytes",
 569         .cmp    = bytes_cmp,
 570 };
 571
 572 static int frag_cmp(struct alloc_stat *l, struct alloc_stat *r)
 573 {
 574         double x, y;
 575
 576         x = fragmentation(l->bytes_req, l->bytes_alloc);
 577         y = fragmentation(r->bytes_req, r->bytes_alloc);
 578
 579         if (x < y)
 580                 return -1;
 581         else if (x > y)
 582                 return 1;
 583         return 0;
 584 }
 585
 586 static struct sort_dimension frag_sort_dimension = {
 587         .name   = "frag",
 588         .cmp    = frag_cmp,
 589 };
 590
 591 static int pingpong_cmp(struct alloc_stat *l, struct alloc_stat *r)
 592 {
 593         if (l->pingpong < r->pingpong)
 594                 return -1;
 595         else if (l->pingpong > r->pingpong)
 596                 return 1;
 597         return 0;
 598 }
 599
 600 static struct sort_dimension pingpong_sort_dimension = {
 601         .name   = "pingpong",
 602         .cmp    = pingpong_cmp,
 603 };
 604
 605 static struct sort_dimension *avail_sorts[] = {
 606         &ptr_sort_dimension,
 607         &callsite_sort_dimension,
 608         &hit_sort_dimension,
 609         &bytes_sort_dimension,
 610         &frag_sort_dimension,
 611         &pingpong_sort_dimension,
 612 };
 613
 614 #define NUM_AVAIL_SORTS \
 615         (int)(sizeof(avail_sorts) / sizeof(struct sort_dimension *))
 616
 617 static int sort_dimension__add(const char *tok, struct list_head *list)
 618 {
 619         struct sort_dimension *sort;
 620         int i;
 621
 622         for (i = 0; i < NUM_AVAIL_SORTS; i++) {
 623                 if (!strcmp(avail_sorts[i]->name, tok)) {
 624                         sort = malloc(sizeof(*sort));
 625                         if (!sort)
 626                                 die("malloc");
 627                         memcpy(sort, avail_sorts[i], sizeof(*sort));
 628                         list_add_tail(&sort->list, list);
 629                         return 0;
 630                 }
 631         }
 632
 633         return -1;
 634 }
 635
 636 static int setup_sorting(struct list_head *sort_list, const char *arg)
 637 {
 638         char *tok;
 639         char *str = strdup(arg);
 640
 641         if (!str)
 642                 die("strdup");
 643
 644         while (true) {
 645                 tok = strsep(&str, ",");
 646                 if (!tok)
 647                         break;
 648                 if (sort_dimension__add(tok, sort_list) < 0) {
 649                         error("Unknown --sort key: '%s'", tok);
 650                         free(str);
 651                         return -1;
 652                 }
 653         }
 654
 655         free(str);
 656         return 0;
 657 }
 658
 659 static int parse_sort_opt(const struct option *opt __used,
 660                           const char *arg, int unset __used)
 661 {
 662         if (!arg)
 663                 return -1;
 664
 665         if (caller_flag > alloc_flag)
 666                 return setup_sorting(&caller_sort, arg);
 667         else
 668                 return setup_sorting(&alloc_sort, arg);
 669
 670         return 0;
 671 }
 672
 673 static int parse_caller_opt(const struct option *opt __used,
 674                           const char *arg __used, int unset __used)
 675 {
 676         caller_flag = (alloc_flag + 1);
 677         return 0;
 678 }
 679
 680 static int parse_alloc_opt(const struct option *opt __used,
 681                           const char *arg __used, int unset __used)
 682 {
 683         alloc_flag = (caller_flag + 1);
 684         return 0;
 685 }
 686
 687 static int parse_line_opt(const struct option *opt __used,
 688                           const char *arg, int unset __used)
 689 {
 690         int lines;
 691
 692         if (!arg)
 693                 return -1;
 694
 695         lines = strtoul(arg, NULL, 10);
 696
 697         if (caller_flag > alloc_flag)
 698                 caller_lines = lines;
 699         else
 700                 alloc_lines = lines;
 701
 702         return 0;
 703 }
 704
 705 static const struct option kmem_options[] = {
 706         OPT_STRING('i', "input", &input_name, "file",
 707                    "input file name"),
 708         OPT_CALLBACK_NOOPT(0, "caller", NULL, NULL,
 709                            "show per-callsite statistics",
 710                            parse_caller_opt),
 711         OPT_CALLBACK_NOOPT(0, "alloc", NULL, NULL,
 712                            "show per-allocation statistics",
 713                            parse_alloc_opt),
 714         OPT_CALLBACK('s', "sort", NULL, "key[,key2...]",
 715                      "sort by keys: ptr, call_site, bytes, hit, pingpong, frag",
 716                      parse_sort_opt),
 717         OPT_CALLBACK('l', "line", NULL, "num",
 718                      "show n lines",
 719                      parse_line_opt),
 720         OPT_BOOLEAN(0, "raw-ip", &raw_ip, "show raw ip instead of symbol"),
 721         OPT_END()
 722 };
 723
 724 static const char *record_args[] = {
 725         "record",
 726         "-a",
 727         "-R",
 728         "-f",
 729         "-c", "1",
 730         "-e", "kmem:kmalloc",
 731         "-e", "kmem:kmalloc_node",
 732         "-e", "kmem:kfree",
 733         "-e", "kmem:kmem_cache_alloc",
 734         "-e", "kmem:kmem_cache_alloc_node",
 735         "-e", "kmem:kmem_cache_free",
 736 };
 737
 738 static int __cmd_record(int argc, const char **argv)
 739 {
 740         unsigned int rec_argc, i, j;
 741         const char **rec_argv;
 742
 743         rec_argc = ARRAY_SIZE(record_args) + argc - 1;
 744         rec_argv = calloc(rec_argc + 1, sizeof(char *));
 745
 746         if (rec_argv == NULL)
 747                 return -ENOMEM;
 748
 749         for (i = 0; i < ARRAY_SIZE(record_args); i++)
 750                 rec_argv[i] = strdup(record_args[i]);
 751
 752         for (j = 1; j < (unsigned int)argc; j++, i++)
 753                 rec_argv[i] = argv[j];
 754
 755         return cmd_record(i, rec_argv, NULL);
 756 }
 757
 758 int cmd_kmem(int argc, const char **argv, const char *prefix __used)
 759 {
 760         argc = parse_options(argc, argv, kmem_options, kmem_usage, 0);
 761
 762         if (!argc)
 763                 usage_with_options(kmem_usage, kmem_options);
 764
 765         symbol__init();
 766
 767         if (!strncmp(argv[0], "rec", 3)) {
 768                 return __cmd_record(argc, argv);
 769         } else if (!strcmp(argv[0], "stat")) {
 770                 setup_cpunode_map();
 771
 772                 if (list_empty(&caller_sort))
 773                         setup_sorting(&caller_sort, default_sort_order);
 774                 if (list_empty(&alloc_sort))
 775                         setup_sorting(&alloc_sort, default_sort_order);
 776
 777                 return __cmd_kmem();
 778         } else
 779                 usage_with_options(kmem_usage, kmem_options);
 780
 781         return 0;
 782 }
 783