tools/perf/builtin-kmem.c

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