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"
17 #include "util/debug.h"
19 #include <linux/rbtree.h>
22 typedef int (*sort_fn_t)(struct alloc_stat *, struct alloc_stat *);
24 static int alloc_flag;
25 static int caller_flag;
27 static int alloc_lines = -1;
28 static int caller_lines = -1;
32 static int *cpunode_map;
33 static int max_cpu_num;
48 static struct rb_root root_alloc_stat;
49 static struct rb_root root_alloc_sorted;
50 static struct rb_root root_caller_stat;
51 static struct rb_root root_caller_sorted;
53 static unsigned long total_requested, total_allocated;
54 static unsigned long nr_allocs, nr_cross_allocs;
56 #define PATH_SYS_NODE "/sys/devices/system/node"
58 static int init_cpunode_map(void)
63 fp = fopen("/sys/devices/system/cpu/kernel_max", "r");
69 if (fscanf(fp, "%d", &max_cpu_num) < 1) {
70 pr_err("Failed to read 'kernel_max' from sysfs");
76 cpunode_map = calloc(max_cpu_num, sizeof(int));
78 pr_err("%s: calloc failed\n", __func__);
82 for (i = 0; i < max_cpu_num; i++)
91 static int setup_cpunode_map(void)
93 struct dirent *dent1, *dent2;
95 unsigned int cpu, mem;
98 if (init_cpunode_map())
101 dir1 = opendir(PATH_SYS_NODE);
105 while ((dent1 = readdir(dir1)) != NULL) {
106 if (dent1->d_type != DT_DIR ||
107 sscanf(dent1->d_name, "node%u", &mem) < 1)
110 snprintf(buf, PATH_MAX, "%s/%s", PATH_SYS_NODE, dent1->d_name);
114 while ((dent2 = readdir(dir2)) != NULL) {
115 if (dent2->d_type != DT_LNK ||
116 sscanf(dent2->d_name, "cpu%u", &cpu) < 1)
118 cpunode_map[cpu] = mem;
126 static int insert_alloc_stat(unsigned long call_site, unsigned long ptr,
127 int bytes_req, int bytes_alloc, int cpu)
129 struct rb_node **node = &root_alloc_stat.rb_node;
130 struct rb_node *parent = NULL;
131 struct alloc_stat *data = NULL;
135 data = rb_entry(*node, struct alloc_stat, node);
138 node = &(*node)->rb_right;
139 else if (ptr < data->ptr)
140 node = &(*node)->rb_left;
145 if (data && data->ptr == ptr) {
147 data->bytes_req += bytes_req;
148 data->bytes_alloc += bytes_alloc;
150 data = malloc(sizeof(*data));
152 pr_err("%s: malloc failed\n", __func__);
158 data->bytes_req = bytes_req;
159 data->bytes_alloc = bytes_alloc;
161 rb_link_node(&data->node, parent, node);
162 rb_insert_color(&data->node, &root_alloc_stat);
164 data->call_site = call_site;
165 data->alloc_cpu = cpu;
169 static int insert_caller_stat(unsigned long call_site,
170 int bytes_req, int bytes_alloc)
172 struct rb_node **node = &root_caller_stat.rb_node;
173 struct rb_node *parent = NULL;
174 struct alloc_stat *data = NULL;
178 data = rb_entry(*node, struct alloc_stat, node);
180 if (call_site > data->call_site)
181 node = &(*node)->rb_right;
182 else if (call_site < data->call_site)
183 node = &(*node)->rb_left;
188 if (data && data->call_site == call_site) {
190 data->bytes_req += bytes_req;
191 data->bytes_alloc += bytes_alloc;
193 data = malloc(sizeof(*data));
195 pr_err("%s: malloc failed\n", __func__);
198 data->call_site = call_site;
201 data->bytes_req = bytes_req;
202 data->bytes_alloc = bytes_alloc;
204 rb_link_node(&data->node, parent, node);
205 rb_insert_color(&data->node, &root_caller_stat);
211 static int perf_evsel__process_alloc_event(struct perf_evsel *evsel,
212 struct perf_sample *sample)
214 unsigned long ptr = perf_evsel__intval(evsel, sample, "ptr"),
215 call_site = perf_evsel__intval(evsel, sample, "call_site");
216 int bytes_req = perf_evsel__intval(evsel, sample, "bytes_req"),
217 bytes_alloc = perf_evsel__intval(evsel, sample, "bytes_alloc");
219 if (insert_alloc_stat(call_site, ptr, bytes_req, bytes_alloc, sample->cpu) ||
220 insert_caller_stat(call_site, bytes_req, bytes_alloc))
223 total_requested += bytes_req;
224 total_allocated += bytes_alloc;
230 static int perf_evsel__process_alloc_node_event(struct perf_evsel *evsel,
231 struct perf_sample *sample)
233 int ret = perf_evsel__process_alloc_event(evsel, sample);
236 int node1 = cpunode_map[sample->cpu],
237 node2 = perf_evsel__intval(evsel, sample, "node");
246 static int ptr_cmp(struct alloc_stat *, struct alloc_stat *);
247 static int callsite_cmp(struct alloc_stat *, struct alloc_stat *);
249 static struct alloc_stat *search_alloc_stat(unsigned long ptr,
250 unsigned long call_site,
251 struct rb_root *root,
254 struct rb_node *node = root->rb_node;
255 struct alloc_stat key = { .ptr = ptr, .call_site = call_site };
258 struct alloc_stat *data;
261 data = rb_entry(node, struct alloc_stat, node);
263 cmp = sort_fn(&key, data);
265 node = node->rb_left;
267 node = node->rb_right;
274 static int perf_evsel__process_free_event(struct perf_evsel *evsel,
275 struct perf_sample *sample)
277 unsigned long ptr = perf_evsel__intval(evsel, sample, "ptr");
278 struct alloc_stat *s_alloc, *s_caller;
280 s_alloc = search_alloc_stat(ptr, 0, &root_alloc_stat, ptr_cmp);
284 if ((short)sample->cpu != s_alloc->alloc_cpu) {
287 s_caller = search_alloc_stat(0, s_alloc->call_site,
288 &root_caller_stat, callsite_cmp);
291 s_caller->pingpong++;
293 s_alloc->alloc_cpu = -1;
298 typedef int (*tracepoint_handler)(struct perf_evsel *evsel,
299 struct perf_sample *sample);
301 static int process_sample_event(struct perf_tool *tool __maybe_unused,
302 union perf_event *event,
303 struct perf_sample *sample,
304 struct perf_evsel *evsel,
305 struct machine *machine)
307 struct thread *thread = machine__findnew_thread(machine, event->ip.pid);
309 if (thread == NULL) {
310 pr_debug("problem processing %d event, skipping it.\n",
315 dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
317 if (evsel->handler.func != NULL) {
318 tracepoint_handler f = evsel->handler.func;
319 return f(evsel, sample);
325 static struct perf_tool perf_kmem = {
326 .sample = process_sample_event,
327 .comm = perf_event__process_comm,
328 .ordered_samples = true,
331 static double fragmentation(unsigned long n_req, unsigned long n_alloc)
336 return 100.0 - (100.0 * n_req / n_alloc);
339 static void __print_result(struct rb_root *root, struct perf_session *session,
340 int n_lines, int is_caller)
342 struct rb_node *next;
343 struct machine *machine;
345 printf("%.102s\n", graph_dotted_line);
346 printf(" %-34s |", is_caller ? "Callsite": "Alloc Ptr");
347 printf(" Total_alloc/Per | Total_req/Per | Hit | Ping-pong | Frag\n");
348 printf("%.102s\n", graph_dotted_line);
350 next = rb_first(root);
352 machine = perf_session__find_host_machine(session);
354 pr_err("__print_result: couldn't find kernel information\n");
357 while (next && n_lines--) {
358 struct alloc_stat *data = rb_entry(next, struct alloc_stat,
360 struct symbol *sym = NULL;
366 addr = data->call_site;
368 sym = machine__find_kernel_function(machine, addr, &map, NULL);
373 snprintf(buf, sizeof(buf), "%s+%" PRIx64 "", sym->name,
374 addr - map->unmap_ip(map, sym->start));
376 snprintf(buf, sizeof(buf), "%#" PRIx64 "", addr);
377 printf(" %-34s |", buf);
379 printf(" %9llu/%-5lu | %9llu/%-5lu | %8lu | %8lu | %6.3f%%\n",
380 (unsigned long long)data->bytes_alloc,
381 (unsigned long)data->bytes_alloc / data->hit,
382 (unsigned long long)data->bytes_req,
383 (unsigned long)data->bytes_req / data->hit,
384 (unsigned long)data->hit,
385 (unsigned long)data->pingpong,
386 fragmentation(data->bytes_req, data->bytes_alloc));
388 next = rb_next(next);
392 printf(" ... | ... | ... | ... | ... | ... \n");
394 printf("%.102s\n", graph_dotted_line);
397 static void print_summary(void)
399 printf("\nSUMMARY\n=======\n");
400 printf("Total bytes requested: %lu\n", total_requested);
401 printf("Total bytes allocated: %lu\n", total_allocated);
402 printf("Total bytes wasted on internal fragmentation: %lu\n",
403 total_allocated - total_requested);
404 printf("Internal fragmentation: %f%%\n",
405 fragmentation(total_requested, total_allocated));
406 printf("Cross CPU allocations: %lu/%lu\n", nr_cross_allocs, nr_allocs);
409 static void print_result(struct perf_session *session)
412 __print_result(&root_caller_sorted, session, caller_lines, 1);
414 __print_result(&root_alloc_sorted, session, alloc_lines, 0);
418 struct sort_dimension {
421 struct list_head list;
424 static LIST_HEAD(caller_sort);
425 static LIST_HEAD(alloc_sort);
427 static void sort_insert(struct rb_root *root, struct alloc_stat *data,
428 struct list_head *sort_list)
430 struct rb_node **new = &(root->rb_node);
431 struct rb_node *parent = NULL;
432 struct sort_dimension *sort;
435 struct alloc_stat *this;
438 this = rb_entry(*new, struct alloc_stat, node);
441 list_for_each_entry(sort, sort_list, list) {
442 cmp = sort->cmp(data, this);
448 new = &((*new)->rb_left);
450 new = &((*new)->rb_right);
453 rb_link_node(&data->node, parent, new);
454 rb_insert_color(&data->node, root);
457 static void __sort_result(struct rb_root *root, struct rb_root *root_sorted,
458 struct list_head *sort_list)
460 struct rb_node *node;
461 struct alloc_stat *data;
464 node = rb_first(root);
468 rb_erase(node, root);
469 data = rb_entry(node, struct alloc_stat, node);
470 sort_insert(root_sorted, data, sort_list);
474 static void sort_result(void)
476 __sort_result(&root_alloc_stat, &root_alloc_sorted, &alloc_sort);
477 __sort_result(&root_caller_stat, &root_caller_sorted, &caller_sort);
480 static int __cmd_kmem(void)
483 struct perf_session *session;
484 const struct perf_evsel_str_handler kmem_tracepoints[] = {
485 { "kmem:kmalloc", perf_evsel__process_alloc_event, },
486 { "kmem:kmem_cache_alloc", perf_evsel__process_alloc_event, },
487 { "kmem:kmalloc_node", perf_evsel__process_alloc_node_event, },
488 { "kmem:kmem_cache_alloc_node", perf_evsel__process_alloc_node_event, },
489 { "kmem:kfree", perf_evsel__process_free_event, },
490 { "kmem:kmem_cache_free", perf_evsel__process_free_event, },
493 session = perf_session__new(input_name, O_RDONLY, 0, false, &perf_kmem);
497 if (perf_session__create_kernel_maps(session) < 0)
500 if (!perf_session__has_traces(session, "kmem record"))
503 if (perf_session__set_tracepoints_handlers(session, kmem_tracepoints)) {
504 pr_err("Initializing perf session tracepoint handlers failed\n");
509 err = perf_session__process_events(session, &perf_kmem);
513 print_result(session);
515 perf_session__delete(session);
519 static int ptr_cmp(struct alloc_stat *l, struct alloc_stat *r)
523 else if (l->ptr > r->ptr)
528 static struct sort_dimension ptr_sort_dimension = {
533 static int callsite_cmp(struct alloc_stat *l, struct alloc_stat *r)
535 if (l->call_site < r->call_site)
537 else if (l->call_site > r->call_site)
542 static struct sort_dimension callsite_sort_dimension = {
547 static int hit_cmp(struct alloc_stat *l, struct alloc_stat *r)
551 else if (l->hit > r->hit)
556 static struct sort_dimension hit_sort_dimension = {
561 static int bytes_cmp(struct alloc_stat *l, struct alloc_stat *r)
563 if (l->bytes_alloc < r->bytes_alloc)
565 else if (l->bytes_alloc > r->bytes_alloc)
570 static struct sort_dimension bytes_sort_dimension = {
575 static int frag_cmp(struct alloc_stat *l, struct alloc_stat *r)
579 x = fragmentation(l->bytes_req, l->bytes_alloc);
580 y = fragmentation(r->bytes_req, r->bytes_alloc);
589 static struct sort_dimension frag_sort_dimension = {
594 static int pingpong_cmp(struct alloc_stat *l, struct alloc_stat *r)
596 if (l->pingpong < r->pingpong)
598 else if (l->pingpong > r->pingpong)
603 static struct sort_dimension pingpong_sort_dimension = {
608 static struct sort_dimension *avail_sorts[] = {
610 &callsite_sort_dimension,
612 &bytes_sort_dimension,
613 &frag_sort_dimension,
614 &pingpong_sort_dimension,
617 #define NUM_AVAIL_SORTS \
618 (int)(sizeof(avail_sorts) / sizeof(struct sort_dimension *))
620 static int sort_dimension__add(const char *tok, struct list_head *list)
622 struct sort_dimension *sort;
625 for (i = 0; i < NUM_AVAIL_SORTS; i++) {
626 if (!strcmp(avail_sorts[i]->name, tok)) {
627 sort = malloc(sizeof(*sort));
629 pr_err("%s: malloc failed\n", __func__);
632 memcpy(sort, avail_sorts[i], sizeof(*sort));
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", "-f", "-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);