5 #include "util/cache.h"
6 #include "util/symbol.h"
7 #include "util/thread.h"
8 #include "util/header.h"
10 #include "util/parse-options.h"
11 #include "util/trace-event.h"
13 #include "util/debug.h"
14 #include "util/data_map.h"
16 #include <linux/rbtree.h>
19 typedef int (*sort_fn_t)(struct alloc_stat *, struct alloc_stat *);
21 static char const *input_name = "perf.data";
23 static struct perf_header *header;
24 static u64 sample_type;
26 static int alloc_flag;
27 static int caller_flag;
29 static int alloc_lines = -1;
30 static int caller_lines = -1;
34 static char default_sort_order[] = "frag,hit,bytes";
36 static int *cpunode_map;
37 static int max_cpu_num;
52 static struct rb_root root_alloc_stat;
53 static struct rb_root root_alloc_sorted;
54 static struct rb_root root_caller_stat;
55 static struct rb_root root_caller_sorted;
57 static unsigned long total_requested, total_allocated;
58 static unsigned long nr_allocs, nr_cross_allocs;
60 #define PATH_SYS_NODE "/sys/devices/system/node"
62 static void init_cpunode_map(void)
67 fp = fopen("/sys/devices/system/cpu/kernel_max", "r");
73 if (fscanf(fp, "%d", &max_cpu_num) < 1)
74 die("Failed to read 'kernel_max' from sysfs");
77 cpunode_map = calloc(max_cpu_num, sizeof(int));
80 for (i = 0; i < max_cpu_num; i++)
85 static void setup_cpunode_map(void)
87 struct dirent *dent1, *dent2;
89 unsigned int cpu, mem;
94 dir1 = opendir(PATH_SYS_NODE);
99 dent1 = readdir(dir1);
103 if (sscanf(dent1->d_name, "node%u", &mem) < 1)
106 snprintf(buf, PATH_MAX, "%s/%s", PATH_SYS_NODE, dent1->d_name);
111 dent2 = readdir(dir2);
114 if (sscanf(dent2->d_name, "cpu%u", &cpu) < 1)
116 cpunode_map[cpu] = mem;
121 static void insert_alloc_stat(unsigned long call_site, unsigned long ptr,
122 int bytes_req, int bytes_alloc, int cpu)
124 struct rb_node **node = &root_alloc_stat.rb_node;
125 struct rb_node *parent = NULL;
126 struct alloc_stat *data = NULL;
130 data = rb_entry(*node, struct alloc_stat, node);
133 node = &(*node)->rb_right;
134 else if (ptr < data->ptr)
135 node = &(*node)->rb_left;
140 if (data && data->ptr == ptr) {
142 data->bytes_req += bytes_req;
143 data->bytes_alloc += bytes_req;
145 data = malloc(sizeof(*data));
151 data->bytes_req = bytes_req;
152 data->bytes_alloc = bytes_alloc;
154 rb_link_node(&data->node, parent, node);
155 rb_insert_color(&data->node, &root_alloc_stat);
157 data->call_site = call_site;
158 data->alloc_cpu = cpu;
161 static void insert_caller_stat(unsigned long call_site,
162 int bytes_req, int bytes_alloc)
164 struct rb_node **node = &root_caller_stat.rb_node;
165 struct rb_node *parent = NULL;
166 struct alloc_stat *data = NULL;
170 data = rb_entry(*node, struct alloc_stat, node);
172 if (call_site > data->call_site)
173 node = &(*node)->rb_right;
174 else if (call_site < data->call_site)
175 node = &(*node)->rb_left;
180 if (data && data->call_site == call_site) {
182 data->bytes_req += bytes_req;
183 data->bytes_alloc += bytes_req;
185 data = malloc(sizeof(*data));
188 data->call_site = call_site;
191 data->bytes_req = bytes_req;
192 data->bytes_alloc = bytes_alloc;
194 rb_link_node(&data->node, parent, node);
195 rb_insert_color(&data->node, &root_caller_stat);
199 static void process_alloc_event(void *data,
202 u64 timestamp __used,
203 struct thread *thread __used,
206 unsigned long call_site;
212 ptr = raw_field_value(event, "ptr", data);
213 call_site = raw_field_value(event, "call_site", data);
214 bytes_req = raw_field_value(event, "bytes_req", data);
215 bytes_alloc = raw_field_value(event, "bytes_alloc", data);
217 insert_alloc_stat(call_site, ptr, bytes_req, bytes_alloc, cpu);
218 insert_caller_stat(call_site, bytes_req, bytes_alloc);
220 total_requested += bytes_req;
221 total_allocated += bytes_alloc;
224 node1 = cpunode_map[cpu];
225 node2 = raw_field_value(event, "node", data);
232 static int ptr_cmp(struct alloc_stat *, struct alloc_stat *);
233 static int callsite_cmp(struct alloc_stat *, struct alloc_stat *);
235 static struct alloc_stat *search_alloc_stat(unsigned long ptr,
236 unsigned long call_site,
237 struct rb_root *root,
240 struct rb_node *node = root->rb_node;
241 struct alloc_stat key = { .ptr = ptr, .call_site = call_site };
244 struct alloc_stat *data;
247 data = rb_entry(node, struct alloc_stat, node);
249 cmp = sort_fn(&key, data);
251 node = node->rb_left;
253 node = node->rb_right;
260 static void process_free_event(void *data,
263 u64 timestamp __used,
264 struct thread *thread __used)
267 struct alloc_stat *s_alloc, *s_caller;
269 ptr = raw_field_value(event, "ptr", data);
271 s_alloc = search_alloc_stat(ptr, 0, &root_alloc_stat, ptr_cmp);
275 if (cpu != s_alloc->alloc_cpu) {
278 s_caller = search_alloc_stat(0, s_alloc->call_site,
279 &root_caller_stat, callsite_cmp);
281 s_caller->pingpong++;
283 s_alloc->alloc_cpu = -1;
287 process_raw_event(event_t *raw_event __used, void *data,
288 int cpu, u64 timestamp, struct thread *thread)
293 type = trace_parse_common_type(data);
294 event = trace_find_event(type);
296 if (!strcmp(event->name, "kmalloc") ||
297 !strcmp(event->name, "kmem_cache_alloc")) {
298 process_alloc_event(data, event, cpu, timestamp, thread, 0);
302 if (!strcmp(event->name, "kmalloc_node") ||
303 !strcmp(event->name, "kmem_cache_alloc_node")) {
304 process_alloc_event(data, event, cpu, timestamp, thread, 1);
308 if (!strcmp(event->name, "kfree") ||
309 !strcmp(event->name, "kmem_cache_free")) {
310 process_free_event(data, event, cpu, timestamp, thread);
315 static int process_sample_event(event_t *event)
317 struct sample_data data;
318 struct thread *thread;
320 memset(&data, 0, sizeof(data));
325 event__parse_sample(event, sample_type, &data);
327 dump_printf("(IP, %d): %d/%d: %p period: %Ld\n",
330 (void *)(long)data.ip,
331 (long long)data.period);
333 thread = threads__findnew(event->ip.pid);
334 if (thread == NULL) {
335 pr_debug("problem processing %d event, skipping it.\n",
340 dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
342 process_raw_event(event, data.raw_data, data.cpu,
348 static int sample_type_check(u64 type)
352 if (!(sample_type & PERF_SAMPLE_RAW)) {
354 "No trace sample to read. Did you call perf record "
362 static struct perf_file_handler file_handler = {
363 .process_sample_event = process_sample_event,
364 .process_comm_event = event__process_comm,
365 .sample_type_check = sample_type_check,
368 static int read_events(void)
370 register_idle_thread();
371 register_perf_file_handler(&file_handler);
373 return mmap_dispatch_perf_file(&header, input_name, 0, 0,
374 &event__cwdlen, &event__cwd);
377 static double fragmentation(unsigned long n_req, unsigned long n_alloc)
382 return 100.0 - (100.0 * n_req / n_alloc);
385 static void __print_result(struct rb_root *root, int n_lines, int is_caller)
387 struct rb_node *next;
389 printf("%.102s\n", graph_dotted_line);
390 printf(" %-34s |", is_caller ? "Callsite": "Alloc Ptr");
391 printf(" Total_alloc/Per | Total_req/Per | Hit | Ping-pong | Frag\n");
392 printf("%.102s\n", graph_dotted_line);
394 next = rb_first(root);
396 while (next && n_lines--) {
397 struct alloc_stat *data = rb_entry(next, struct alloc_stat,
399 struct symbol *sym = NULL;
404 addr = data->call_site;
406 sym = thread__find_function(kthread, addr, NULL);
411 snprintf(buf, sizeof(buf), "%s+%Lx", sym->name,
414 snprintf(buf, sizeof(buf), "%#Lx", addr);
415 printf(" %-34s |", buf);
417 printf(" %9llu/%-5lu | %9llu/%-5lu | %6lu | %8lu | %6.3f%%\n",
418 (unsigned long long)data->bytes_alloc,
419 (unsigned long)data->bytes_alloc / data->hit,
420 (unsigned long long)data->bytes_req,
421 (unsigned long)data->bytes_req / data->hit,
422 (unsigned long)data->hit,
423 (unsigned long)data->pingpong,
424 fragmentation(data->bytes_req, data->bytes_alloc));
426 next = rb_next(next);
430 printf(" ... | ... | ... | ... | ... | ... \n");
432 printf("%.102s\n", graph_dotted_line);
435 static void print_summary(void)
437 printf("\nSUMMARY\n=======\n");
438 printf("Total bytes requested: %lu\n", total_requested);
439 printf("Total bytes allocated: %lu\n", total_allocated);
440 printf("Total bytes wasted on internal fragmentation: %lu\n",
441 total_allocated - total_requested);
442 printf("Internal fragmentation: %f%%\n",
443 fragmentation(total_requested, total_allocated));
444 printf("Cross CPU allocations: %lu/%lu\n", nr_cross_allocs, nr_allocs);
447 static void print_result(void)
450 __print_result(&root_caller_sorted, caller_lines, 1);
452 __print_result(&root_alloc_sorted, alloc_lines, 0);
456 struct sort_dimension {
459 struct list_head list;
462 static LIST_HEAD(caller_sort);
463 static LIST_HEAD(alloc_sort);
465 static void sort_insert(struct rb_root *root, struct alloc_stat *data,
466 struct list_head *sort_list)
468 struct rb_node **new = &(root->rb_node);
469 struct rb_node *parent = NULL;
470 struct sort_dimension *sort;
473 struct alloc_stat *this;
476 this = rb_entry(*new, struct alloc_stat, node);
479 list_for_each_entry(sort, sort_list, list) {
480 cmp = sort->cmp(data, this);
486 new = &((*new)->rb_left);
488 new = &((*new)->rb_right);
491 rb_link_node(&data->node, parent, new);
492 rb_insert_color(&data->node, root);
495 static void __sort_result(struct rb_root *root, struct rb_root *root_sorted,
496 struct list_head *sort_list)
498 struct rb_node *node;
499 struct alloc_stat *data;
502 node = rb_first(root);
506 rb_erase(node, root);
507 data = rb_entry(node, struct alloc_stat, node);
508 sort_insert(root_sorted, data, sort_list);
512 static void sort_result(void)
514 __sort_result(&root_alloc_stat, &root_alloc_sorted, &alloc_sort);
515 __sort_result(&root_caller_stat, &root_caller_sorted, &caller_sort);
518 static int __cmd_kmem(void)
528 static const char * const kmem_usage[] = {
529 "perf kmem [<options>] {record|stat}",
533 static int ptr_cmp(struct alloc_stat *l, struct alloc_stat *r)
537 else if (l->ptr > r->ptr)
542 static struct sort_dimension ptr_sort_dimension = {
547 static int callsite_cmp(struct alloc_stat *l, struct alloc_stat *r)
549 if (l->call_site < r->call_site)
551 else if (l->call_site > r->call_site)
556 static struct sort_dimension callsite_sort_dimension = {
561 static int hit_cmp(struct alloc_stat *l, struct alloc_stat *r)
565 else if (l->hit > r->hit)
570 static struct sort_dimension hit_sort_dimension = {
575 static int bytes_cmp(struct alloc_stat *l, struct alloc_stat *r)
577 if (l->bytes_alloc < r->bytes_alloc)
579 else if (l->bytes_alloc > r->bytes_alloc)
584 static struct sort_dimension bytes_sort_dimension = {
589 static int frag_cmp(struct alloc_stat *l, struct alloc_stat *r)
593 x = fragmentation(l->bytes_req, l->bytes_alloc);
594 y = fragmentation(r->bytes_req, r->bytes_alloc);
603 static struct sort_dimension frag_sort_dimension = {
608 static int pingpong_cmp(struct alloc_stat *l, struct alloc_stat *r)
610 if (l->pingpong < r->pingpong)
612 else if (l->pingpong > r->pingpong)
617 static struct sort_dimension pingpong_sort_dimension = {
622 static struct sort_dimension *avail_sorts[] = {
624 &callsite_sort_dimension,
626 &bytes_sort_dimension,
627 &frag_sort_dimension,
628 &pingpong_sort_dimension,
631 #define NUM_AVAIL_SORTS \
632 (int)(sizeof(avail_sorts) / sizeof(struct sort_dimension *))
634 static int sort_dimension__add(const char *tok, struct list_head *list)
636 struct sort_dimension *sort;
639 for (i = 0; i < NUM_AVAIL_SORTS; i++) {
640 if (!strcmp(avail_sorts[i]->name, tok)) {
641 sort = malloc(sizeof(*sort));
644 memcpy(sort, avail_sorts[i], sizeof(*sort));
645 list_add_tail(&sort->list, list);
653 static int setup_sorting(struct list_head *sort_list, const char *arg)
656 char *str = strdup(arg);
662 tok = strsep(&str, ",");
665 if (sort_dimension__add(tok, sort_list) < 0) {
666 error("Unknown --sort key: '%s'", tok);
675 static int parse_sort_opt(const struct option *opt __used,
676 const char *arg, int unset __used)
681 if (caller_flag > alloc_flag)
682 return setup_sorting(&caller_sort, arg);
684 return setup_sorting(&alloc_sort, arg);
689 static int parse_caller_opt(const struct option *opt __used,
690 const char *arg, int unset __used)
692 caller_flag = (alloc_flag + 1);
696 static int parse_alloc_opt(const struct option *opt __used,
697 const char *arg, int unset __used)
699 alloc_flag = (caller_flag + 1);
703 static int parse_line_opt(const struct option *opt __used,
704 const char *arg, int unset __used)
711 lines = strtoul(arg, NULL, 10);
713 if (caller_flag > alloc_flag)
714 caller_lines = lines;
721 static const struct option kmem_options[] = {
722 OPT_STRING('i', "input", &input_name, "file",
724 OPT_CALLBACK_NOOPT(0, "caller", NULL, NULL,
725 "show per-callsite statistics",
727 OPT_CALLBACK_NOOPT(0, "alloc", NULL, NULL,
728 "show per-allocation statistics",
730 OPT_CALLBACK('s', "sort", NULL, "key[,key2...]",
731 "sort by keys: ptr, call_site, bytes, hit, pingpong, frag",
733 OPT_CALLBACK('l', "line", NULL, "num",
736 OPT_BOOLEAN(0, "raw-ip", &raw_ip, "show raw ip instead of symbol"),
740 static const char *record_args[] = {
747 "-e", "kmem:kmalloc",
748 "-e", "kmem:kmalloc_node",
750 "-e", "kmem:kmem_cache_alloc",
751 "-e", "kmem:kmem_cache_alloc_node",
752 "-e", "kmem:kmem_cache_free",
755 static int __cmd_record(int argc, const char **argv)
757 unsigned int rec_argc, i, j;
758 const char **rec_argv;
760 rec_argc = ARRAY_SIZE(record_args) + argc - 1;
761 rec_argv = calloc(rec_argc + 1, sizeof(char *));
763 for (i = 0; i < ARRAY_SIZE(record_args); i++)
764 rec_argv[i] = strdup(record_args[i]);
766 for (j = 1; j < (unsigned int)argc; j++, i++)
767 rec_argv[i] = argv[j];
769 return cmd_record(i, rec_argv, NULL);
772 int cmd_kmem(int argc, const char **argv, const char *prefix __used)
776 argc = parse_options(argc, argv, kmem_options, kmem_usage, 0);
779 usage_with_options(kmem_usage, kmem_options);
781 if (!strncmp(argv[0], "rec", 3)) {
782 return __cmd_record(argc, argv);
783 } else if (!strcmp(argv[0], "stat")) {
786 if (list_empty(&caller_sort))
787 setup_sorting(&caller_sort, default_sort_order);
788 if (list_empty(&alloc_sort))
789 setup_sorting(&alloc_sort, default_sort_order);