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, event->ip.pid);
 309
 310         if (thread == NULL) {
 311                 pr_debug("problem processing %d event, skipping it.\n",
 312                          event->header.type);
 313                 return -1;
 314         }
 315
 316         dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
 317
 318         if (evsel->handler.func != NULL) {
 319                 tracepoint_handler f = evsel->handler.func;
 320                 return f(evsel, sample);
 321         }
 322
 323         return 0;
 324 }
 325
 326 static struct perf_tool perf_kmem = {
 327         .sample          = process_sample_event,
 328         .comm            = perf_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 = &session->machines.host;
 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         while (next && n_lines--) {
 354                 struct alloc_stat *data = rb_entry(next, struct alloc_stat,
 355                                                    node);
 356                 struct symbol *sym = NULL;
 357                 struct map *map;
 358                 char buf[BUFSIZ];
 359                 u64 addr;
 360
 361                 if (is_caller) {
 362                         addr = data->call_site;
 363                         if (!raw_ip)
 364                                 sym = machine__find_kernel_function(machine, addr, &map, NULL);
 365                 } else
 366                         addr = data->ptr;
 367
 368                 if (sym != NULL)
 369                         snprintf(buf, sizeof(buf), "%s+%" PRIx64 "", sym->name,
 370                                  addr - map->unmap_ip(map, sym->start));
 371                 else
 372                         snprintf(buf, sizeof(buf), "%#" PRIx64 "", addr);
 373                 printf(" %-34s |", buf);
 374
 375                 printf(" %9llu/%-5lu | %9llu/%-5lu | %8lu | %8lu | %6.3f%%\n",
 376                        (unsigned long long)data->bytes_alloc,
 377                        (unsigned long)data->bytes_alloc / data->hit,
 378                        (unsigned long long)data->bytes_req,
 379                        (unsigned long)data->bytes_req / data->hit,
 380                        (unsigned long)data->hit,
 381                        (unsigned long)data->pingpong,
 382                        fragmentation(data->bytes_req, data->bytes_alloc));
 383
 384                 next = rb_next(next);
 385         }
 386
 387         if (n_lines == -1)
 388                 printf(" ...                                | ...             | ...             | ...    | ...      | ...   \n");
 389
 390         printf("%.102s\n", graph_dotted_line);
 391 }
 392
 393 static void print_summary(void)
 394 {
 395         printf("\nSUMMARY\n=======\n");
 396         printf("Total bytes requested: %lu\n", total_requested);
 397         printf("Total bytes allocated: %lu\n", total_allocated);
 398         printf("Total bytes wasted on internal fragmentation: %lu\n",
 399                total_allocated - total_requested);
 400         printf("Internal fragmentation: %f%%\n",
 401                fragmentation(total_requested, total_allocated));
 402         printf("Cross CPU allocations: %lu/%lu\n", nr_cross_allocs, nr_allocs);
 403 }
 404
 405 static void print_result(struct perf_session *session)
 406 {
 407         if (caller_flag)
 408                 __print_result(&root_caller_sorted, session, caller_lines, 1);
 409         if (alloc_flag)
 410                 __print_result(&root_alloc_sorted, session, alloc_lines, 0);
 411         print_summary();
 412 }
 413
 414 struct sort_dimension {
 415         const char              name[20];
 416         sort_fn_t               cmp;
 417         struct list_head        list;
 418 };
 419
 420 static LIST_HEAD(caller_sort);
 421 static LIST_HEAD(alloc_sort);
 422
 423 static void sort_insert(struct rb_root *root, struct alloc_stat *data,
 424                         struct list_head *sort_list)
 425 {
 426         struct rb_node **new = &(root->rb_node);
 427         struct rb_node *parent = NULL;
 428         struct sort_dimension *sort;
 429
 430         while (*new) {
 431                 struct alloc_stat *this;
 432                 int cmp = 0;
 433
 434                 this = rb_entry(*new, struct alloc_stat, node);
 435                 parent = *new;
 436
 437                 list_for_each_entry(sort, sort_list, list) {
 438                         cmp = sort->cmp(data, this);
 439                         if (cmp)
 440                                 break;
 441                 }
 442
 443                 if (cmp > 0)
 444                         new = &((*new)->rb_left);
 445                 else
 446                         new = &((*new)->rb_right);
 447         }
 448
 449         rb_link_node(&data->node, parent, new);
 450         rb_insert_color(&data->node, root);
 451 }
 452
 453 static void __sort_result(struct rb_root *root, struct rb_root *root_sorted,
 454                           struct list_head *sort_list)
 455 {
 456         struct rb_node *node;
 457         struct alloc_stat *data;
 458
 459         for (;;) {
 460                 node = rb_first(root);
 461                 if (!node)
 462                         break;
 463
 464                 rb_erase(node, root);
 465                 data = rb_entry(node, struct alloc_stat, node);
 466                 sort_insert(root_sorted, data, sort_list);
 467         }
 468 }
 469
 470 static void sort_result(void)
 471 {
 472         __sort_result(&root_alloc_stat, &root_alloc_sorted, &alloc_sort);
 473         __sort_result(&root_caller_stat, &root_caller_sorted, &caller_sort);
 474 }
 475
 476 static int __cmd_kmem(void)
 477 {
 478         int err = -EINVAL;
 479         struct perf_session *session;
 480         const struct perf_evsel_str_handler kmem_tracepoints[] = {
 481                 { "kmem:kmalloc",               perf_evsel__process_alloc_event, },
 482                 { "kmem:kmem_cache_alloc",      perf_evsel__process_alloc_event, },
 483                 { "kmem:kmalloc_node",          perf_evsel__process_alloc_node_event, },
 484                 { "kmem:kmem_cache_alloc_node", perf_evsel__process_alloc_node_event, },
 485                 { "kmem:kfree",                 perf_evsel__process_free_event, },
 486                 { "kmem:kmem_cache_free",       perf_evsel__process_free_event, },
 487         };
 488
 489         session = perf_session__new(input_name, O_RDONLY, 0, false, &perf_kmem);
 490         if (session == NULL)
 491                 return -ENOMEM;
 492
 493         if (perf_session__create_kernel_maps(session) < 0)
 494                 goto out_delete;
 495
 496         if (!perf_session__has_traces(session, "kmem record"))
 497                 goto out_delete;
 498
 499         if (perf_session__set_tracepoints_handlers(session, kmem_tracepoints)) {
 500                 pr_err("Initializing perf session tracepoint handlers failed\n");
 501                 return -1;
 502         }
 503
 504         setup_pager();
 505         err = perf_session__process_events(session, &perf_kmem);
 506         if (err != 0)
 507                 goto out_delete;
 508         sort_result();
 509         print_result(session);
 510 out_delete:
 511         perf_session__delete(session);
 512         return err;
 513 }
 514
 515 static int ptr_cmp(struct alloc_stat *l, struct alloc_stat *r)
 516 {
 517         if (l->ptr < r->ptr)
 518                 return -1;
 519         else if (l->ptr > r->ptr)
 520                 return 1;
 521         return 0;
 522 }
 523
 524 static struct sort_dimension ptr_sort_dimension = {
 525         .name   = "ptr",
 526         .cmp    = ptr_cmp,
 527 };
 528
 529 static int callsite_cmp(struct alloc_stat *l, struct alloc_stat *r)
 530 {
 531         if (l->call_site < r->call_site)
 532                 return -1;
 533         else if (l->call_site > r->call_site)
 534                 return 1;
 535         return 0;
 536 }
 537
 538 static struct sort_dimension callsite_sort_dimension = {
 539         .name   = "callsite",
 540         .cmp    = callsite_cmp,
 541 };
 542
 543 static int hit_cmp(struct alloc_stat *l, struct alloc_stat *r)
 544 {
 545         if (l->hit < r->hit)
 546                 return -1;
 547         else if (l->hit > r->hit)
 548                 return 1;
 549         return 0;
 550 }
 551
 552 static struct sort_dimension hit_sort_dimension = {
 553         .name   = "hit",
 554         .cmp    = hit_cmp,
 555 };
 556
 557 static int bytes_cmp(struct alloc_stat *l, struct alloc_stat *r)
 558 {
 559         if (l->bytes_alloc < r->bytes_alloc)
 560                 return -1;
 561         else if (l->bytes_alloc > r->bytes_alloc)
 562                 return 1;
 563         return 0;
 564 }
 565
 566 static struct sort_dimension bytes_sort_dimension = {
 567         .name   = "bytes",
 568         .cmp    = bytes_cmp,
 569 };
 570
 571 static int frag_cmp(struct alloc_stat *l, struct alloc_stat *r)
 572 {
 573         double x, y;
 574
 575         x = fragmentation(l->bytes_req, l->bytes_alloc);
 576         y = fragmentation(r->bytes_req, r->bytes_alloc);
 577
 578         if (x < y)
 579                 return -1;
 580         else if (x > y)
 581                 return 1;
 582         return 0;
 583 }
 584
 585 static struct sort_dimension frag_sort_dimension = {
 586         .name   = "frag",
 587         .cmp    = frag_cmp,
 588 };
 589
 590 static int pingpong_cmp(struct alloc_stat *l, struct alloc_stat *r)
 591 {
 592         if (l->pingpong < r->pingpong)
 593                 return -1;
 594         else if (l->pingpong > r->pingpong)
 595                 return 1;
 596         return 0;
 597 }
 598
 599 static struct sort_dimension pingpong_sort_dimension = {
 600         .name   = "pingpong",
 601         .cmp    = pingpong_cmp,
 602 };
 603
 604 static struct sort_dimension *avail_sorts[] = {
 605         &ptr_sort_dimension,
 606         &callsite_sort_dimension,
 607         &hit_sort_dimension,
 608         &bytes_sort_dimension,
 609         &frag_sort_dimension,
 610         &pingpong_sort_dimension,
 611 };
 612
 613 #define NUM_AVAIL_SORTS ((int)ARRAY_SIZE(avail_sorts))
 614
 615 static int sort_dimension__add(const char *tok, struct list_head *list)
 616 {
 617         struct sort_dimension *sort;
 618         int i;
 619
 620         for (i = 0; i < NUM_AVAIL_SORTS; i++) {
 621                 if (!strcmp(avail_sorts[i]->name, tok)) {
 622                         sort = memdup(avail_sorts[i], sizeof(*avail_sorts[i]));
 623                         if (!sort) {
 624                                 pr_err("%s: memdup failed\n", __func__);
 625                                 return -1;
 626                         }
 627                         list_add_tail(&sort->list, list);
 628                         return 0;
 629                 }
 630         }
 631
 632         return -1;
 633 }
 634
 635 static int setup_sorting(struct list_head *sort_list, const char *arg)
 636 {
 637         char *tok;
 638         char *str = strdup(arg);
 639
 640         if (!str) {
 641                 pr_err("%s: strdup failed\n", __func__);
 642                 return -1;
 643         }
 644
 645         while (true) {
 646                 tok = strsep(&str, ",");
 647                 if (!tok)
 648                         break;
 649                 if (sort_dimension__add(tok, sort_list) < 0) {
 650                         error("Unknown --sort key: '%s'", tok);
 651                         free(str);
 652                         return -1;
 653                 }
 654         }
 655
 656         free(str);
 657         return 0;
 658 }
 659
 660 static int parse_sort_opt(const struct option *opt __maybe_unused,
 661                           const char *arg, int unset __maybe_unused)
 662 {
 663         if (!arg)
 664                 return -1;
 665
 666         if (caller_flag > alloc_flag)
 667                 return setup_sorting(&caller_sort, arg);
 668         else
 669                 return setup_sorting(&alloc_sort, arg);
 670
 671         return 0;
 672 }
 673
 674 static int parse_caller_opt(const struct option *opt __maybe_unused,
 675                             const char *arg __maybe_unused,
 676                             int unset __maybe_unused)
 677 {
 678         caller_flag = (alloc_flag + 1);
 679         return 0;
 680 }
 681
 682 static int parse_alloc_opt(const struct option *opt __maybe_unused,
 683                            const char *arg __maybe_unused,
 684                            int unset __maybe_unused)
 685 {
 686         alloc_flag = (caller_flag + 1);
 687         return 0;
 688 }
 689
 690 static int parse_line_opt(const struct option *opt __maybe_unused,
 691                           const char *arg, int unset __maybe_unused)
 692 {
 693         int lines;
 694
 695         if (!arg)
 696                 return -1;
 697
 698         lines = strtoul(arg, NULL, 10);
 699
 700         if (caller_flag > alloc_flag)
 701                 caller_lines = lines;
 702         else
 703                 alloc_lines = lines;
 704
 705         return 0;
 706 }
 707
 708 static int __cmd_record(int argc, const char **argv)
 709 {
 710         const char * const record_args[] = {
 711         "record", "-a", "-R", "-f", "-c", "1",
 712         "-e", "kmem:kmalloc",
 713         "-e", "kmem:kmalloc_node",
 714         "-e", "kmem:kfree",
 715         "-e", "kmem:kmem_cache_alloc",
 716         "-e", "kmem:kmem_cache_alloc_node",
 717         "-e", "kmem:kmem_cache_free",
 718         };
 719         unsigned int rec_argc, i, j;
 720         const char **rec_argv;
 721
 722         rec_argc = ARRAY_SIZE(record_args) + argc - 1;
 723         rec_argv = calloc(rec_argc + 1, sizeof(char *));
 724
 725         if (rec_argv == NULL)
 726                 return -ENOMEM;
 727
 728         for (i = 0; i < ARRAY_SIZE(record_args); i++)
 729                 rec_argv[i] = strdup(record_args[i]);
 730
 731         for (j = 1; j < (unsigned int)argc; j++, i++)
 732                 rec_argv[i] = argv[j];
 733
 734         return cmd_record(i, rec_argv, NULL);
 735 }
 736
 737 int cmd_kmem(int argc, const char **argv, const char *prefix __maybe_unused)
 738 {
 739         const char * const default_sort_order = "frag,hit,bytes";
 740         const struct option kmem_options[] = {
 741         OPT_STRING('i', "input", &input_name, "file", "input file name"),
 742         OPT_CALLBACK_NOOPT(0, "caller", NULL, NULL,
 743                            "show per-callsite statistics", parse_caller_opt),
 744         OPT_CALLBACK_NOOPT(0, "alloc", NULL, NULL,
 745                            "show per-allocation statistics", parse_alloc_opt),
 746         OPT_CALLBACK('s', "sort", NULL, "key[,key2...]",
 747                      "sort by keys: ptr, call_site, bytes, hit, pingpong, frag",
 748                      parse_sort_opt),
 749         OPT_CALLBACK('l', "line", NULL, "num", "show n lines", parse_line_opt),
 750         OPT_BOOLEAN(0, "raw-ip", &raw_ip, "show raw ip instead of symbol"),
 751         OPT_END()
 752         };
 753         const char * const kmem_usage[] = {
 754                 "perf kmem [<options>] {record|stat}",
 755                 NULL
 756         };
 757         argc = parse_options(argc, argv, kmem_options, kmem_usage, 0);
 758
 759         if (!argc)
 760                 usage_with_options(kmem_usage, kmem_options);
 761
 762         symbol__init();
 763
 764         if (!strncmp(argv[0], "rec", 3)) {
 765                 return __cmd_record(argc, argv);
 766         } else if (!strcmp(argv[0], "stat")) {
 767                 if (setup_cpunode_map())
 768                         return -1;
 769
 770                 if (list_empty(&caller_sort))
 771                         setup_sorting(&caller_sort, default_sort_order);
 772                 if (list_empty(&alloc_sort))
 773                         setup_sorting(&alloc_sort, default_sort_order);
 774
 775                 return __cmd_kmem();
 776         } else
 777                 usage_with_options(kmem_usage, kmem_options);
 778
 779         return 0;
 780 }
 781