dm9601: make it clear that dm9620/dm9621a are also supported
[platform/kernel/linux-rpi.git] / 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 #include "util/data.h"
17
18 #include "util/debug.h"
19
20 #include <linux/rbtree.h>
21 #include <linux/string.h>
22
23 struct alloc_stat;
24 typedef int (*sort_fn_t)(struct alloc_stat *, struct alloc_stat *);
25
26 static int                      alloc_flag;
27 static int                      caller_flag;
28
29 static int                      alloc_lines = -1;
30 static int                      caller_lines = -1;
31
32 static bool                     raw_ip;
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 int init_cpunode_map(void)
61 {
62         FILE *fp;
63         int i, err = -1;
64
65         fp = fopen("/sys/devices/system/cpu/kernel_max", "r");
66         if (!fp) {
67                 max_cpu_num = 4096;
68                 return 0;
69         }
70
71         if (fscanf(fp, "%d", &max_cpu_num) < 1) {
72                 pr_err("Failed to read 'kernel_max' from sysfs");
73                 goto out_close;
74         }
75
76         max_cpu_num++;
77
78         cpunode_map = calloc(max_cpu_num, sizeof(int));
79         if (!cpunode_map) {
80                 pr_err("%s: calloc failed\n", __func__);
81                 goto out_close;
82         }
83
84         for (i = 0; i < max_cpu_num; i++)
85                 cpunode_map[i] = -1;
86
87         err = 0;
88 out_close:
89         fclose(fp);
90         return err;
91 }
92
93 static int setup_cpunode_map(void)
94 {
95         struct dirent *dent1, *dent2;
96         DIR *dir1, *dir2;
97         unsigned int cpu, mem;
98         char buf[PATH_MAX];
99
100         if (init_cpunode_map())
101                 return -1;
102
103         dir1 = opendir(PATH_SYS_NODE);
104         if (!dir1)
105                 return 0;
106
107         while ((dent1 = readdir(dir1)) != NULL) {
108                 if (dent1->d_type != DT_DIR ||
109                     sscanf(dent1->d_name, "node%u", &mem) < 1)
110                         continue;
111
112                 snprintf(buf, PATH_MAX, "%s/%s", PATH_SYS_NODE, dent1->d_name);
113                 dir2 = opendir(buf);
114                 if (!dir2)
115                         continue;
116                 while ((dent2 = readdir(dir2)) != NULL) {
117                         if (dent2->d_type != DT_LNK ||
118                             sscanf(dent2->d_name, "cpu%u", &cpu) < 1)
119                                 continue;
120                         cpunode_map[cpu] = mem;
121                 }
122                 closedir(dir2);
123         }
124         closedir(dir1);
125         return 0;
126 }
127
128 static int insert_alloc_stat(unsigned long call_site, unsigned long ptr,
129                              int bytes_req, int bytes_alloc, int cpu)
130 {
131         struct rb_node **node = &root_alloc_stat.rb_node;
132         struct rb_node *parent = NULL;
133         struct alloc_stat *data = NULL;
134
135         while (*node) {
136                 parent = *node;
137                 data = rb_entry(*node, struct alloc_stat, node);
138
139                 if (ptr > data->ptr)
140                         node = &(*node)->rb_right;
141                 else if (ptr < data->ptr)
142                         node = &(*node)->rb_left;
143                 else
144                         break;
145         }
146
147         if (data && data->ptr == ptr) {
148                 data->hit++;
149                 data->bytes_req += bytes_req;
150                 data->bytes_alloc += bytes_alloc;
151         } else {
152                 data = malloc(sizeof(*data));
153                 if (!data) {
154                         pr_err("%s: malloc failed\n", __func__);
155                         return -1;
156                 }
157                 data->ptr = ptr;
158                 data->pingpong = 0;
159                 data->hit = 1;
160                 data->bytes_req = bytes_req;
161                 data->bytes_alloc = bytes_alloc;
162
163                 rb_link_node(&data->node, parent, node);
164                 rb_insert_color(&data->node, &root_alloc_stat);
165         }
166         data->call_site = call_site;
167         data->alloc_cpu = cpu;
168         return 0;
169 }
170
171 static int insert_caller_stat(unsigned long call_site,
172                               int bytes_req, int bytes_alloc)
173 {
174         struct rb_node **node = &root_caller_stat.rb_node;
175         struct rb_node *parent = NULL;
176         struct alloc_stat *data = NULL;
177
178         while (*node) {
179                 parent = *node;
180                 data = rb_entry(*node, struct alloc_stat, node);
181
182                 if (call_site > data->call_site)
183                         node = &(*node)->rb_right;
184                 else if (call_site < data->call_site)
185                         node = &(*node)->rb_left;
186                 else
187                         break;
188         }
189
190         if (data && data->call_site == call_site) {
191                 data->hit++;
192                 data->bytes_req += bytes_req;
193                 data->bytes_alloc += bytes_alloc;
194         } else {
195                 data = malloc(sizeof(*data));
196                 if (!data) {
197                         pr_err("%s: malloc failed\n", __func__);
198                         return -1;
199                 }
200                 data->call_site = call_site;
201                 data->pingpong = 0;
202                 data->hit = 1;
203                 data->bytes_req = bytes_req;
204                 data->bytes_alloc = bytes_alloc;
205
206                 rb_link_node(&data->node, parent, node);
207                 rb_insert_color(&data->node, &root_caller_stat);
208         }
209
210         return 0;
211 }
212
213 static int perf_evsel__process_alloc_event(struct perf_evsel *evsel,
214                                            struct perf_sample *sample)
215 {
216         unsigned long ptr = perf_evsel__intval(evsel, sample, "ptr"),
217                       call_site = perf_evsel__intval(evsel, sample, "call_site");
218         int bytes_req = perf_evsel__intval(evsel, sample, "bytes_req"),
219             bytes_alloc = perf_evsel__intval(evsel, sample, "bytes_alloc");
220
221         if (insert_alloc_stat(call_site, ptr, bytes_req, bytes_alloc, sample->cpu) ||
222             insert_caller_stat(call_site, bytes_req, bytes_alloc))
223                 return -1;
224
225         total_requested += bytes_req;
226         total_allocated += bytes_alloc;
227
228         nr_allocs++;
229         return 0;
230 }
231
232 static int perf_evsel__process_alloc_node_event(struct perf_evsel *evsel,
233                                                 struct perf_sample *sample)
234 {
235         int ret = perf_evsel__process_alloc_event(evsel, sample);
236
237         if (!ret) {
238                 int node1 = cpunode_map[sample->cpu],
239                     node2 = perf_evsel__intval(evsel, sample, "node");
240
241                 if (node1 != node2)
242                         nr_cross_allocs++;
243         }
244
245         return ret;
246 }
247
248 static int ptr_cmp(struct alloc_stat *, struct alloc_stat *);
249 static int callsite_cmp(struct alloc_stat *, struct alloc_stat *);
250
251 static struct alloc_stat *search_alloc_stat(unsigned long ptr,
252                                             unsigned long call_site,
253                                             struct rb_root *root,
254                                             sort_fn_t sort_fn)
255 {
256         struct rb_node *node = root->rb_node;
257         struct alloc_stat key = { .ptr = ptr, .call_site = call_site };
258
259         while (node) {
260                 struct alloc_stat *data;
261                 int cmp;
262
263                 data = rb_entry(node, struct alloc_stat, node);
264
265                 cmp = sort_fn(&key, data);
266                 if (cmp < 0)
267                         node = node->rb_left;
268                 else if (cmp > 0)
269                         node = node->rb_right;
270                 else
271                         return data;
272         }
273         return NULL;
274 }
275
276 static int perf_evsel__process_free_event(struct perf_evsel *evsel,
277                                           struct perf_sample *sample)
278 {
279         unsigned long ptr = perf_evsel__intval(evsel, sample, "ptr");
280         struct alloc_stat *s_alloc, *s_caller;
281
282         s_alloc = search_alloc_stat(ptr, 0, &root_alloc_stat, ptr_cmp);
283         if (!s_alloc)
284                 return 0;
285
286         if ((short)sample->cpu != s_alloc->alloc_cpu) {
287                 s_alloc->pingpong++;
288
289                 s_caller = search_alloc_stat(0, s_alloc->call_site,
290                                              &root_caller_stat, callsite_cmp);
291                 if (!s_caller)
292                         return -1;
293                 s_caller->pingpong++;
294         }
295         s_alloc->alloc_cpu = -1;
296
297         return 0;
298 }
299
300 typedef int (*tracepoint_handler)(struct perf_evsel *evsel,
301                                   struct perf_sample *sample);
302
303 static int process_sample_event(struct perf_tool *tool __maybe_unused,
304                                 union perf_event *event,
305                                 struct perf_sample *sample,
306                                 struct perf_evsel *evsel,
307                                 struct machine *machine)
308 {
309         struct thread *thread = machine__findnew_thread(machine, sample->pid,
310                                                         sample->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_str(thread), thread->tid);
319
320         if (evsel->handler != NULL) {
321                 tracepoint_handler f = evsel->handler;
322                 return f(evsel, sample);
323         }
324
325         return 0;
326 }
327
328 static struct perf_tool perf_kmem = {
329         .sample          = process_sample_event,
330         .comm            = perf_event__process_comm,
331         .ordered_samples = true,
332 };
333
334 static double fragmentation(unsigned long n_req, unsigned long n_alloc)
335 {
336         if (n_alloc == 0)
337                 return 0.0;
338         else
339                 return 100.0 - (100.0 * n_req / n_alloc);
340 }
341
342 static void __print_result(struct rb_root *root, struct perf_session *session,
343                            int n_lines, int is_caller)
344 {
345         struct rb_node *next;
346         struct machine *machine = &session->machines.host;
347
348         printf("%.102s\n", graph_dotted_line);
349         printf(" %-34s |",  is_caller ? "Callsite": "Alloc Ptr");
350         printf(" Total_alloc/Per | Total_req/Per   | Hit      | Ping-pong | Frag\n");
351         printf("%.102s\n", graph_dotted_line);
352
353         next = rb_first(root);
354
355         while (next && n_lines--) {
356                 struct alloc_stat *data = rb_entry(next, struct alloc_stat,
357                                                    node);
358                 struct symbol *sym = NULL;
359                 struct map *map;
360                 char buf[BUFSIZ];
361                 u64 addr;
362
363                 if (is_caller) {
364                         addr = data->call_site;
365                         if (!raw_ip)
366                                 sym = machine__find_kernel_function(machine, addr, &map, NULL);
367                 } else
368                         addr = data->ptr;
369
370                 if (sym != NULL)
371                         snprintf(buf, sizeof(buf), "%s+%" PRIx64 "", sym->name,
372                                  addr - map->unmap_ip(map, sym->start));
373                 else
374                         snprintf(buf, sizeof(buf), "%#" PRIx64 "", addr);
375                 printf(" %-34s |", buf);
376
377                 printf(" %9llu/%-5lu | %9llu/%-5lu | %8lu | %8lu | %6.3f%%\n",
378                        (unsigned long long)data->bytes_alloc,
379                        (unsigned long)data->bytes_alloc / data->hit,
380                        (unsigned long long)data->bytes_req,
381                        (unsigned long)data->bytes_req / data->hit,
382                        (unsigned long)data->hit,
383                        (unsigned long)data->pingpong,
384                        fragmentation(data->bytes_req, data->bytes_alloc));
385
386                 next = rb_next(next);
387         }
388
389         if (n_lines == -1)
390                 printf(" ...                                | ...             | ...             | ...    | ...      | ...   \n");
391
392         printf("%.102s\n", graph_dotted_line);
393 }
394
395 static void print_summary(void)
396 {
397         printf("\nSUMMARY\n=======\n");
398         printf("Total bytes requested: %lu\n", total_requested);
399         printf("Total bytes allocated: %lu\n", total_allocated);
400         printf("Total bytes wasted on internal fragmentation: %lu\n",
401                total_allocated - total_requested);
402         printf("Internal fragmentation: %f%%\n",
403                fragmentation(total_requested, total_allocated));
404         printf("Cross CPU allocations: %lu/%lu\n", nr_cross_allocs, nr_allocs);
405 }
406
407 static void print_result(struct perf_session *session)
408 {
409         if (caller_flag)
410                 __print_result(&root_caller_sorted, session, caller_lines, 1);
411         if (alloc_flag)
412                 __print_result(&root_alloc_sorted, session, alloc_lines, 0);
413         print_summary();
414 }
415
416 struct sort_dimension {
417         const char              name[20];
418         sort_fn_t               cmp;
419         struct list_head        list;
420 };
421
422 static LIST_HEAD(caller_sort);
423 static LIST_HEAD(alloc_sort);
424
425 static void sort_insert(struct rb_root *root, struct alloc_stat *data,
426                         struct list_head *sort_list)
427 {
428         struct rb_node **new = &(root->rb_node);
429         struct rb_node *parent = NULL;
430         struct sort_dimension *sort;
431
432         while (*new) {
433                 struct alloc_stat *this;
434                 int cmp = 0;
435
436                 this = rb_entry(*new, struct alloc_stat, node);
437                 parent = *new;
438
439                 list_for_each_entry(sort, sort_list, list) {
440                         cmp = sort->cmp(data, this);
441                         if (cmp)
442                                 break;
443                 }
444
445                 if (cmp > 0)
446                         new = &((*new)->rb_left);
447                 else
448                         new = &((*new)->rb_right);
449         }
450
451         rb_link_node(&data->node, parent, new);
452         rb_insert_color(&data->node, root);
453 }
454
455 static void __sort_result(struct rb_root *root, struct rb_root *root_sorted,
456                           struct list_head *sort_list)
457 {
458         struct rb_node *node;
459         struct alloc_stat *data;
460
461         for (;;) {
462                 node = rb_first(root);
463                 if (!node)
464                         break;
465
466                 rb_erase(node, root);
467                 data = rb_entry(node, struct alloc_stat, node);
468                 sort_insert(root_sorted, data, sort_list);
469         }
470 }
471
472 static void sort_result(void)
473 {
474         __sort_result(&root_alloc_stat, &root_alloc_sorted, &alloc_sort);
475         __sort_result(&root_caller_stat, &root_caller_sorted, &caller_sort);
476 }
477
478 static int __cmd_kmem(void)
479 {
480         int err = -EINVAL;
481         struct perf_session *session;
482         const struct perf_evsel_str_handler kmem_tracepoints[] = {
483                 { "kmem:kmalloc",               perf_evsel__process_alloc_event, },
484                 { "kmem:kmem_cache_alloc",      perf_evsel__process_alloc_event, },
485                 { "kmem:kmalloc_node",          perf_evsel__process_alloc_node_event, },
486                 { "kmem:kmem_cache_alloc_node", perf_evsel__process_alloc_node_event, },
487                 { "kmem:kfree",                 perf_evsel__process_free_event, },
488                 { "kmem:kmem_cache_free",       perf_evsel__process_free_event, },
489         };
490         struct perf_data_file file = {
491                 .path = input_name,
492                 .mode = PERF_DATA_MODE_READ,
493         };
494
495         session = perf_session__new(&file, false, &perf_kmem);
496         if (session == NULL)
497                 return -ENOMEM;
498
499         if (perf_session__create_kernel_maps(session) < 0)
500                 goto out_delete;
501
502         if (!perf_session__has_traces(session, "kmem record"))
503                 goto out_delete;
504
505         if (perf_session__set_tracepoints_handlers(session, kmem_tracepoints)) {
506                 pr_err("Initializing perf session tracepoint handlers failed\n");
507                 return -1;
508         }
509
510         setup_pager();
511         err = perf_session__process_events(session, &perf_kmem);
512         if (err != 0)
513                 goto out_delete;
514         sort_result();
515         print_result(session);
516 out_delete:
517         perf_session__delete(session);
518         return err;
519 }
520
521 static int ptr_cmp(struct alloc_stat *l, struct alloc_stat *r)
522 {
523         if (l->ptr < r->ptr)
524                 return -1;
525         else if (l->ptr > r->ptr)
526                 return 1;
527         return 0;
528 }
529
530 static struct sort_dimension ptr_sort_dimension = {
531         .name   = "ptr",
532         .cmp    = ptr_cmp,
533 };
534
535 static int callsite_cmp(struct alloc_stat *l, struct alloc_stat *r)
536 {
537         if (l->call_site < r->call_site)
538                 return -1;
539         else if (l->call_site > r->call_site)
540                 return 1;
541         return 0;
542 }
543
544 static struct sort_dimension callsite_sort_dimension = {
545         .name   = "callsite",
546         .cmp    = callsite_cmp,
547 };
548
549 static int hit_cmp(struct alloc_stat *l, struct alloc_stat *r)
550 {
551         if (l->hit < r->hit)
552                 return -1;
553         else if (l->hit > r->hit)
554                 return 1;
555         return 0;
556 }
557
558 static struct sort_dimension hit_sort_dimension = {
559         .name   = "hit",
560         .cmp    = hit_cmp,
561 };
562
563 static int bytes_cmp(struct alloc_stat *l, struct alloc_stat *r)
564 {
565         if (l->bytes_alloc < r->bytes_alloc)
566                 return -1;
567         else if (l->bytes_alloc > r->bytes_alloc)
568                 return 1;
569         return 0;
570 }
571
572 static struct sort_dimension bytes_sort_dimension = {
573         .name   = "bytes",
574         .cmp    = bytes_cmp,
575 };
576
577 static int frag_cmp(struct alloc_stat *l, struct alloc_stat *r)
578 {
579         double x, y;
580
581         x = fragmentation(l->bytes_req, l->bytes_alloc);
582         y = fragmentation(r->bytes_req, r->bytes_alloc);
583
584         if (x < y)
585                 return -1;
586         else if (x > y)
587                 return 1;
588         return 0;
589 }
590
591 static struct sort_dimension frag_sort_dimension = {
592         .name   = "frag",
593         .cmp    = frag_cmp,
594 };
595
596 static int pingpong_cmp(struct alloc_stat *l, struct alloc_stat *r)
597 {
598         if (l->pingpong < r->pingpong)
599                 return -1;
600         else if (l->pingpong > r->pingpong)
601                 return 1;
602         return 0;
603 }
604
605 static struct sort_dimension pingpong_sort_dimension = {
606         .name   = "pingpong",
607         .cmp    = pingpong_cmp,
608 };
609
610 static struct sort_dimension *avail_sorts[] = {
611         &ptr_sort_dimension,
612         &callsite_sort_dimension,
613         &hit_sort_dimension,
614         &bytes_sort_dimension,
615         &frag_sort_dimension,
616         &pingpong_sort_dimension,
617 };
618
619 #define NUM_AVAIL_SORTS ((int)ARRAY_SIZE(avail_sorts))
620
621 static int sort_dimension__add(const char *tok, struct list_head *list)
622 {
623         struct sort_dimension *sort;
624         int i;
625
626         for (i = 0; i < NUM_AVAIL_SORTS; i++) {
627                 if (!strcmp(avail_sorts[i]->name, tok)) {
628                         sort = memdup(avail_sorts[i], sizeof(*avail_sorts[i]));
629                         if (!sort) {
630                                 pr_err("%s: memdup failed\n", __func__);
631                                 return -1;
632                         }
633                         list_add_tail(&sort->list, list);
634                         return 0;
635                 }
636         }
637
638         return -1;
639 }
640
641 static int setup_sorting(struct list_head *sort_list, const char *arg)
642 {
643         char *tok;
644         char *str = strdup(arg);
645
646         if (!str) {
647                 pr_err("%s: strdup failed\n", __func__);
648                 return -1;
649         }
650
651         while (true) {
652                 tok = strsep(&str, ",");
653                 if (!tok)
654                         break;
655                 if (sort_dimension__add(tok, sort_list) < 0) {
656                         error("Unknown --sort key: '%s'", tok);
657                         free(str);
658                         return -1;
659                 }
660         }
661
662         free(str);
663         return 0;
664 }
665
666 static int parse_sort_opt(const struct option *opt __maybe_unused,
667                           const char *arg, int unset __maybe_unused)
668 {
669         if (!arg)
670                 return -1;
671
672         if (caller_flag > alloc_flag)
673                 return setup_sorting(&caller_sort, arg);
674         else
675                 return setup_sorting(&alloc_sort, arg);
676
677         return 0;
678 }
679
680 static int parse_caller_opt(const struct option *opt __maybe_unused,
681                             const char *arg __maybe_unused,
682                             int unset __maybe_unused)
683 {
684         caller_flag = (alloc_flag + 1);
685         return 0;
686 }
687
688 static int parse_alloc_opt(const struct option *opt __maybe_unused,
689                            const char *arg __maybe_unused,
690                            int unset __maybe_unused)
691 {
692         alloc_flag = (caller_flag + 1);
693         return 0;
694 }
695
696 static int parse_line_opt(const struct option *opt __maybe_unused,
697                           const char *arg, int unset __maybe_unused)
698 {
699         int lines;
700
701         if (!arg)
702                 return -1;
703
704         lines = strtoul(arg, NULL, 10);
705
706         if (caller_flag > alloc_flag)
707                 caller_lines = lines;
708         else
709                 alloc_lines = lines;
710
711         return 0;
712 }
713
714 static int __cmd_record(int argc, const char **argv)
715 {
716         const char * const record_args[] = {
717         "record", "-a", "-R", "-c", "1",
718         "-e", "kmem:kmalloc",
719         "-e", "kmem:kmalloc_node",
720         "-e", "kmem:kfree",
721         "-e", "kmem:kmem_cache_alloc",
722         "-e", "kmem:kmem_cache_alloc_node",
723         "-e", "kmem:kmem_cache_free",
724         };
725         unsigned int rec_argc, i, j;
726         const char **rec_argv;
727
728         rec_argc = ARRAY_SIZE(record_args) + argc - 1;
729         rec_argv = calloc(rec_argc + 1, sizeof(char *));
730
731         if (rec_argv == NULL)
732                 return -ENOMEM;
733
734         for (i = 0; i < ARRAY_SIZE(record_args); i++)
735                 rec_argv[i] = strdup(record_args[i]);
736
737         for (j = 1; j < (unsigned int)argc; j++, i++)
738                 rec_argv[i] = argv[j];
739
740         return cmd_record(i, rec_argv, NULL);
741 }
742
743 int cmd_kmem(int argc, const char **argv, const char *prefix __maybe_unused)
744 {
745         const char * const default_sort_order = "frag,hit,bytes";
746         const struct option kmem_options[] = {
747         OPT_STRING('i', "input", &input_name, "file", "input file name"),
748         OPT_CALLBACK_NOOPT(0, "caller", NULL, NULL,
749                            "show per-callsite statistics", parse_caller_opt),
750         OPT_CALLBACK_NOOPT(0, "alloc", NULL, NULL,
751                            "show per-allocation statistics", parse_alloc_opt),
752         OPT_CALLBACK('s', "sort", NULL, "key[,key2...]",
753                      "sort by keys: ptr, call_site, bytes, hit, pingpong, frag",
754                      parse_sort_opt),
755         OPT_CALLBACK('l', "line", NULL, "num", "show n lines", parse_line_opt),
756         OPT_BOOLEAN(0, "raw-ip", &raw_ip, "show raw ip instead of symbol"),
757         OPT_END()
758         };
759         const char * const kmem_usage[] = {
760                 "perf kmem [<options>] {record|stat}",
761                 NULL
762         };
763         argc = parse_options(argc, argv, kmem_options, kmem_usage, 0);
764
765         if (!argc)
766                 usage_with_options(kmem_usage, kmem_options);
767
768         symbol__init();
769
770         if (!strncmp(argv[0], "rec", 3)) {
771                 return __cmd_record(argc, argv);
772         } else if (!strcmp(argv[0], "stat")) {
773                 if (setup_cpunode_map())
774                         return -1;
775
776                 if (list_empty(&caller_sort))
777                         setup_sorting(&caller_sort, default_sort_order);
778                 if (list_empty(&alloc_sort))
779                         setup_sorting(&alloc_sort, default_sort_order);
780
781                 return __cmd_kmem();
782         } else
783                 usage_with_options(kmem_usage, kmem_options);
784
785         return 0;
786 }
787