4 #include "util/evlist.h"
5 #include "util/evsel.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"
14 #include "util/parse-options.h"
15 #include "util/trace-event.h"
16 #include "util/data.h"
18 #include "util/debug.h"
20 #include <linux/rbtree.h>
21 #include <linux/string.h>
24 typedef int (*sort_fn_t)(struct alloc_stat *, struct alloc_stat *);
26 static int alloc_flag;
27 static int caller_flag;
29 static int alloc_lines = -1;
30 static int caller_lines = -1;
34 static int *cpunode_map;
35 static int max_cpu_num;
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;
55 static unsigned long total_requested, total_allocated;
56 static unsigned long nr_allocs, nr_cross_allocs;
58 #define PATH_SYS_NODE "/sys/devices/system/node"
60 static int init_cpunode_map(void)
65 fp = fopen("/sys/devices/system/cpu/kernel_max", "r");
71 if (fscanf(fp, "%d", &max_cpu_num) < 1) {
72 pr_err("Failed to read 'kernel_max' from sysfs");
78 cpunode_map = calloc(max_cpu_num, sizeof(int));
80 pr_err("%s: calloc failed\n", __func__);
84 for (i = 0; i < max_cpu_num; i++)
93 static int setup_cpunode_map(void)
95 struct dirent *dent1, *dent2;
97 unsigned int cpu, mem;
100 if (init_cpunode_map())
103 dir1 = opendir(PATH_SYS_NODE);
107 while ((dent1 = readdir(dir1)) != NULL) {
108 if (dent1->d_type != DT_DIR ||
109 sscanf(dent1->d_name, "node%u", &mem) < 1)
112 snprintf(buf, PATH_MAX, "%s/%s", PATH_SYS_NODE, dent1->d_name);
116 while ((dent2 = readdir(dir2)) != NULL) {
117 if (dent2->d_type != DT_LNK ||
118 sscanf(dent2->d_name, "cpu%u", &cpu) < 1)
120 cpunode_map[cpu] = mem;
128 static int insert_alloc_stat(unsigned long call_site, unsigned long ptr,
129 int bytes_req, int bytes_alloc, int cpu)
131 struct rb_node **node = &root_alloc_stat.rb_node;
132 struct rb_node *parent = NULL;
133 struct alloc_stat *data = NULL;
137 data = rb_entry(*node, struct alloc_stat, node);
140 node = &(*node)->rb_right;
141 else if (ptr < data->ptr)
142 node = &(*node)->rb_left;
147 if (data && data->ptr == ptr) {
149 data->bytes_req += bytes_req;
150 data->bytes_alloc += bytes_alloc;
152 data = malloc(sizeof(*data));
154 pr_err("%s: malloc failed\n", __func__);
160 data->bytes_req = bytes_req;
161 data->bytes_alloc = bytes_alloc;
163 rb_link_node(&data->node, parent, node);
164 rb_insert_color(&data->node, &root_alloc_stat);
166 data->call_site = call_site;
167 data->alloc_cpu = cpu;
171 static int insert_caller_stat(unsigned long call_site,
172 int bytes_req, int bytes_alloc)
174 struct rb_node **node = &root_caller_stat.rb_node;
175 struct rb_node *parent = NULL;
176 struct alloc_stat *data = NULL;
180 data = rb_entry(*node, struct alloc_stat, node);
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;
190 if (data && data->call_site == call_site) {
192 data->bytes_req += bytes_req;
193 data->bytes_alloc += bytes_alloc;
195 data = malloc(sizeof(*data));
197 pr_err("%s: malloc failed\n", __func__);
200 data->call_site = call_site;
203 data->bytes_req = bytes_req;
204 data->bytes_alloc = bytes_alloc;
206 rb_link_node(&data->node, parent, node);
207 rb_insert_color(&data->node, &root_caller_stat);
213 static int perf_evsel__process_alloc_event(struct perf_evsel *evsel,
214 struct perf_sample *sample)
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");
221 if (insert_alloc_stat(call_site, ptr, bytes_req, bytes_alloc, sample->cpu) ||
222 insert_caller_stat(call_site, bytes_req, bytes_alloc))
225 total_requested += bytes_req;
226 total_allocated += bytes_alloc;
232 static int perf_evsel__process_alloc_node_event(struct perf_evsel *evsel,
233 struct perf_sample *sample)
235 int ret = perf_evsel__process_alloc_event(evsel, sample);
238 int node1 = cpunode_map[sample->cpu],
239 node2 = perf_evsel__intval(evsel, sample, "node");
248 static int ptr_cmp(struct alloc_stat *, struct alloc_stat *);
249 static int callsite_cmp(struct alloc_stat *, struct alloc_stat *);
251 static struct alloc_stat *search_alloc_stat(unsigned long ptr,
252 unsigned long call_site,
253 struct rb_root *root,
256 struct rb_node *node = root->rb_node;
257 struct alloc_stat key = { .ptr = ptr, .call_site = call_site };
260 struct alloc_stat *data;
263 data = rb_entry(node, struct alloc_stat, node);
265 cmp = sort_fn(&key, data);
267 node = node->rb_left;
269 node = node->rb_right;
276 static int perf_evsel__process_free_event(struct perf_evsel *evsel,
277 struct perf_sample *sample)
279 unsigned long ptr = perf_evsel__intval(evsel, sample, "ptr");
280 struct alloc_stat *s_alloc, *s_caller;
282 s_alloc = search_alloc_stat(ptr, 0, &root_alloc_stat, ptr_cmp);
286 if ((short)sample->cpu != s_alloc->alloc_cpu) {
289 s_caller = search_alloc_stat(0, s_alloc->call_site,
290 &root_caller_stat, callsite_cmp);
293 s_caller->pingpong++;
295 s_alloc->alloc_cpu = -1;
300 typedef int (*tracepoint_handler)(struct perf_evsel *evsel,
301 struct perf_sample *sample);
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)
309 struct thread *thread = machine__findnew_thread(machine, sample->pid,
312 if (thread == NULL) {
313 pr_debug("problem processing %d event, skipping it.\n",
318 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
320 if (evsel->handler != NULL) {
321 tracepoint_handler f = evsel->handler;
322 return f(evsel, sample);
328 static struct perf_tool perf_kmem = {
329 .sample = process_sample_event,
330 .comm = perf_event__process_comm,
331 .ordered_samples = true,
334 static double fragmentation(unsigned long n_req, unsigned long n_alloc)
339 return 100.0 - (100.0 * n_req / n_alloc);
342 static void __print_result(struct rb_root *root, struct perf_session *session,
343 int n_lines, int is_caller)
345 struct rb_node *next;
346 struct machine *machine = &session->machines.host;
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);
353 next = rb_first(root);
355 while (next && n_lines--) {
356 struct alloc_stat *data = rb_entry(next, struct alloc_stat,
358 struct symbol *sym = NULL;
364 addr = data->call_site;
366 sym = machine__find_kernel_function(machine, addr, &map, NULL);
371 snprintf(buf, sizeof(buf), "%s+%" PRIx64 "", sym->name,
372 addr - map->unmap_ip(map, sym->start));
374 snprintf(buf, sizeof(buf), "%#" PRIx64 "", addr);
375 printf(" %-34s |", buf);
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));
386 next = rb_next(next);
390 printf(" ... | ... | ... | ... | ... | ... \n");
392 printf("%.102s\n", graph_dotted_line);
395 static void print_summary(void)
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);
407 static void print_result(struct perf_session *session)
410 __print_result(&root_caller_sorted, session, caller_lines, 1);
412 __print_result(&root_alloc_sorted, session, alloc_lines, 0);
416 struct sort_dimension {
419 struct list_head list;
422 static LIST_HEAD(caller_sort);
423 static LIST_HEAD(alloc_sort);
425 static void sort_insert(struct rb_root *root, struct alloc_stat *data,
426 struct list_head *sort_list)
428 struct rb_node **new = &(root->rb_node);
429 struct rb_node *parent = NULL;
430 struct sort_dimension *sort;
433 struct alloc_stat *this;
436 this = rb_entry(*new, struct alloc_stat, node);
439 list_for_each_entry(sort, sort_list, list) {
440 cmp = sort->cmp(data, this);
446 new = &((*new)->rb_left);
448 new = &((*new)->rb_right);
451 rb_link_node(&data->node, parent, new);
452 rb_insert_color(&data->node, root);
455 static void __sort_result(struct rb_root *root, struct rb_root *root_sorted,
456 struct list_head *sort_list)
458 struct rb_node *node;
459 struct alloc_stat *data;
462 node = rb_first(root);
466 rb_erase(node, root);
467 data = rb_entry(node, struct alloc_stat, node);
468 sort_insert(root_sorted, data, sort_list);
472 static void sort_result(void)
474 __sort_result(&root_alloc_stat, &root_alloc_sorted, &alloc_sort);
475 __sort_result(&root_caller_stat, &root_caller_sorted, &caller_sort);
478 static int __cmd_kmem(void)
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, },
490 struct perf_data_file file = {
492 .mode = PERF_DATA_MODE_READ,
495 session = perf_session__new(&file, false, &perf_kmem);
499 if (perf_session__create_kernel_maps(session) < 0)
502 if (!perf_session__has_traces(session, "kmem record"))
505 if (perf_session__set_tracepoints_handlers(session, kmem_tracepoints)) {
506 pr_err("Initializing perf session tracepoint handlers failed\n");
511 err = perf_session__process_events(session, &perf_kmem);
515 print_result(session);
517 perf_session__delete(session);
521 static int ptr_cmp(struct alloc_stat *l, struct alloc_stat *r)
525 else if (l->ptr > r->ptr)
530 static struct sort_dimension ptr_sort_dimension = {
535 static int callsite_cmp(struct alloc_stat *l, struct alloc_stat *r)
537 if (l->call_site < r->call_site)
539 else if (l->call_site > r->call_site)
544 static struct sort_dimension callsite_sort_dimension = {
549 static int hit_cmp(struct alloc_stat *l, struct alloc_stat *r)
553 else if (l->hit > r->hit)
558 static struct sort_dimension hit_sort_dimension = {
563 static int bytes_cmp(struct alloc_stat *l, struct alloc_stat *r)
565 if (l->bytes_alloc < r->bytes_alloc)
567 else if (l->bytes_alloc > r->bytes_alloc)
572 static struct sort_dimension bytes_sort_dimension = {
577 static int frag_cmp(struct alloc_stat *l, struct alloc_stat *r)
581 x = fragmentation(l->bytes_req, l->bytes_alloc);
582 y = fragmentation(r->bytes_req, r->bytes_alloc);
591 static struct sort_dimension frag_sort_dimension = {
596 static int pingpong_cmp(struct alloc_stat *l, struct alloc_stat *r)
598 if (l->pingpong < r->pingpong)
600 else if (l->pingpong > r->pingpong)
605 static struct sort_dimension pingpong_sort_dimension = {
610 static struct sort_dimension *avail_sorts[] = {
612 &callsite_sort_dimension,
614 &bytes_sort_dimension,
615 &frag_sort_dimension,
616 &pingpong_sort_dimension,
619 #define NUM_AVAIL_SORTS ((int)ARRAY_SIZE(avail_sorts))
621 static int sort_dimension__add(const char *tok, struct list_head *list)
623 struct sort_dimension *sort;
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]));
630 pr_err("%s: memdup failed\n", __func__);
633 list_add_tail(&sort->list, list);
641 static int setup_sorting(struct list_head *sort_list, const char *arg)
644 char *str = strdup(arg);
647 pr_err("%s: strdup failed\n", __func__);
652 tok = strsep(&str, ",");
655 if (sort_dimension__add(tok, sort_list) < 0) {
656 error("Unknown --sort key: '%s'", tok);
666 static int parse_sort_opt(const struct option *opt __maybe_unused,
667 const char *arg, int unset __maybe_unused)
672 if (caller_flag > alloc_flag)
673 return setup_sorting(&caller_sort, arg);
675 return setup_sorting(&alloc_sort, arg);
680 static int parse_caller_opt(const struct option *opt __maybe_unused,
681 const char *arg __maybe_unused,
682 int unset __maybe_unused)
684 caller_flag = (alloc_flag + 1);
688 static int parse_alloc_opt(const struct option *opt __maybe_unused,
689 const char *arg __maybe_unused,
690 int unset __maybe_unused)
692 alloc_flag = (caller_flag + 1);
696 static int parse_line_opt(const struct option *opt __maybe_unused,
697 const char *arg, int unset __maybe_unused)
704 lines = strtoul(arg, NULL, 10);
706 if (caller_flag > alloc_flag)
707 caller_lines = lines;
714 static int __cmd_record(int argc, const char **argv)
716 const char * const record_args[] = {
717 "record", "-a", "-R", "-c", "1",
718 "-e", "kmem:kmalloc",
719 "-e", "kmem:kmalloc_node",
721 "-e", "kmem:kmem_cache_alloc",
722 "-e", "kmem:kmem_cache_alloc_node",
723 "-e", "kmem:kmem_cache_free",
725 unsigned int rec_argc, i, j;
726 const char **rec_argv;
728 rec_argc = ARRAY_SIZE(record_args) + argc - 1;
729 rec_argv = calloc(rec_argc + 1, sizeof(char *));
731 if (rec_argv == NULL)
734 for (i = 0; i < ARRAY_SIZE(record_args); i++)
735 rec_argv[i] = strdup(record_args[i]);
737 for (j = 1; j < (unsigned int)argc; j++, i++)
738 rec_argv[i] = argv[j];
740 return cmd_record(i, rec_argv, NULL);
743 int cmd_kmem(int argc, const char **argv, const char *prefix __maybe_unused)
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",
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"),
759 const char * const kmem_usage[] = {
760 "perf kmem [<options>] {record|stat}",
763 argc = parse_options(argc, argv, kmem_options, kmem_usage, 0);
766 usage_with_options(kmem_usage, kmem_options);
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())
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);
783 usage_with_options(kmem_usage, kmem_options);