5 #include "util/cache.h"
6 #include "util/symbol.h"
7 #include "util/thread.h"
8 #include "util/header.h"
9 #include "util/session.h"
10 #include "util/tool.h"
12 #include "util/parse-options.h"
13 #include "util/trace-event.h"
15 #include "util/debug.h"
17 #include <linux/rbtree.h>
20 typedef int (*sort_fn_t)(struct alloc_stat *, struct alloc_stat *);
22 static const char *input_name;
24 static int alloc_flag;
25 static int caller_flag;
27 static int alloc_lines = -1;
28 static int caller_lines = -1;
32 static char default_sort_order[] = "frag,hit,bytes";
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"
61 struct perf_tool tool;
62 struct perf_session *session;
65 static void init_cpunode_map(void)
70 fp = fopen("/sys/devices/system/cpu/kernel_max", "r");
76 if (fscanf(fp, "%d", &max_cpu_num) < 1)
77 die("Failed to read 'kernel_max' from sysfs");
80 cpunode_map = calloc(max_cpu_num, sizeof(int));
83 for (i = 0; i < max_cpu_num; i++)
88 static void setup_cpunode_map(void)
90 struct dirent *dent1, *dent2;
92 unsigned int cpu, mem;
97 dir1 = opendir(PATH_SYS_NODE);
101 while ((dent1 = readdir(dir1)) != NULL) {
102 if (dent1->d_type != DT_DIR ||
103 sscanf(dent1->d_name, "node%u", &mem) < 1)
106 snprintf(buf, PATH_MAX, "%s/%s", PATH_SYS_NODE, dent1->d_name);
110 while ((dent2 = readdir(dir2)) != NULL) {
111 if (dent2->d_type != DT_LNK ||
112 sscanf(dent2->d_name, "cpu%u", &cpu) < 1)
114 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_alloc;
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_alloc;
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,
200 struct event_format *event,
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,
261 struct event_format *event,
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;
286 static void process_raw_event(struct perf_tool *tool,
287 union perf_event *raw_event __used, void *data,
288 int cpu, u64 timestamp, struct thread *thread)
290 struct perf_kmem *kmem = container_of(tool, struct perf_kmem, tool);
291 struct event_format *event;
294 type = trace_parse_common_type(kmem->session->pevent, data);
295 event = pevent_find_event(kmem->session->pevent, type);
297 if (!strcmp(event->name, "kmalloc") ||
298 !strcmp(event->name, "kmem_cache_alloc")) {
299 process_alloc_event(data, event, cpu, timestamp, thread, 0);
303 if (!strcmp(event->name, "kmalloc_node") ||
304 !strcmp(event->name, "kmem_cache_alloc_node")) {
305 process_alloc_event(data, event, cpu, timestamp, thread, 1);
309 if (!strcmp(event->name, "kfree") ||
310 !strcmp(event->name, "kmem_cache_free")) {
311 process_free_event(data, event, cpu, timestamp, thread);
316 static int process_sample_event(struct perf_tool *tool,
317 union perf_event *event,
318 struct perf_sample *sample,
319 struct perf_evsel *evsel __used,
320 struct machine *machine)
322 struct thread *thread = machine__findnew_thread(machine, event->ip.pid);
324 if (thread == NULL) {
325 pr_debug("problem processing %d event, skipping it.\n",
330 dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
332 process_raw_event(tool, event, sample->raw_data, sample->cpu,
333 sample->time, thread);
338 static struct perf_kmem perf_kmem = {
340 .sample = process_sample_event,
341 .comm = perf_event__process_comm,
342 .ordered_samples = true,
346 static double fragmentation(unsigned long n_req, unsigned long n_alloc)
351 return 100.0 - (100.0 * n_req / n_alloc);
354 static void __print_result(struct rb_root *root, struct perf_session *session,
355 int n_lines, int is_caller)
357 struct rb_node *next;
358 struct machine *machine;
360 printf("%.102s\n", graph_dotted_line);
361 printf(" %-34s |", is_caller ? "Callsite": "Alloc Ptr");
362 printf(" Total_alloc/Per | Total_req/Per | Hit | Ping-pong | Frag\n");
363 printf("%.102s\n", graph_dotted_line);
365 next = rb_first(root);
367 machine = perf_session__find_host_machine(session);
369 pr_err("__print_result: couldn't find kernel information\n");
372 while (next && n_lines--) {
373 struct alloc_stat *data = rb_entry(next, struct alloc_stat,
375 struct symbol *sym = NULL;
381 addr = data->call_site;
383 sym = machine__find_kernel_function(machine, addr, &map, NULL);
388 snprintf(buf, sizeof(buf), "%s+%" PRIx64 "", sym->name,
389 addr - map->unmap_ip(map, sym->start));
391 snprintf(buf, sizeof(buf), "%#" PRIx64 "", addr);
392 printf(" %-34s |", buf);
394 printf(" %9llu/%-5lu | %9llu/%-5lu | %8lu | %8lu | %6.3f%%\n",
395 (unsigned long long)data->bytes_alloc,
396 (unsigned long)data->bytes_alloc / data->hit,
397 (unsigned long long)data->bytes_req,
398 (unsigned long)data->bytes_req / data->hit,
399 (unsigned long)data->hit,
400 (unsigned long)data->pingpong,
401 fragmentation(data->bytes_req, data->bytes_alloc));
403 next = rb_next(next);
407 printf(" ... | ... | ... | ... | ... | ... \n");
409 printf("%.102s\n", graph_dotted_line);
412 static void print_summary(void)
414 printf("\nSUMMARY\n=======\n");
415 printf("Total bytes requested: %lu\n", total_requested);
416 printf("Total bytes allocated: %lu\n", total_allocated);
417 printf("Total bytes wasted on internal fragmentation: %lu\n",
418 total_allocated - total_requested);
419 printf("Internal fragmentation: %f%%\n",
420 fragmentation(total_requested, total_allocated));
421 printf("Cross CPU allocations: %lu/%lu\n", nr_cross_allocs, nr_allocs);
424 static void print_result(struct perf_session *session)
427 __print_result(&root_caller_sorted, session, caller_lines, 1);
429 __print_result(&root_alloc_sorted, session, alloc_lines, 0);
433 struct sort_dimension {
436 struct list_head list;
439 static LIST_HEAD(caller_sort);
440 static LIST_HEAD(alloc_sort);
442 static void sort_insert(struct rb_root *root, struct alloc_stat *data,
443 struct list_head *sort_list)
445 struct rb_node **new = &(root->rb_node);
446 struct rb_node *parent = NULL;
447 struct sort_dimension *sort;
450 struct alloc_stat *this;
453 this = rb_entry(*new, struct alloc_stat, node);
456 list_for_each_entry(sort, sort_list, list) {
457 cmp = sort->cmp(data, this);
463 new = &((*new)->rb_left);
465 new = &((*new)->rb_right);
468 rb_link_node(&data->node, parent, new);
469 rb_insert_color(&data->node, root);
472 static void __sort_result(struct rb_root *root, struct rb_root *root_sorted,
473 struct list_head *sort_list)
475 struct rb_node *node;
476 struct alloc_stat *data;
479 node = rb_first(root);
483 rb_erase(node, root);
484 data = rb_entry(node, struct alloc_stat, node);
485 sort_insert(root_sorted, data, sort_list);
489 static void sort_result(void)
491 __sort_result(&root_alloc_stat, &root_alloc_sorted, &alloc_sort);
492 __sort_result(&root_caller_stat, &root_caller_sorted, &caller_sort);
495 static int __cmd_kmem(void)
498 struct perf_session *session;
500 session = perf_session__new(input_name, O_RDONLY, 0, false,
505 perf_kmem.session = session;
507 if (perf_session__create_kernel_maps(session) < 0)
510 if (!perf_session__has_traces(session, "kmem record"))
514 err = perf_session__process_events(session, &perf_kmem.tool);
518 print_result(session);
520 perf_session__delete(session);
524 static const char * const kmem_usage[] = {
525 "perf kmem [<options>] {record|stat}",
529 static int ptr_cmp(struct alloc_stat *l, struct alloc_stat *r)
533 else if (l->ptr > r->ptr)
538 static struct sort_dimension ptr_sort_dimension = {
543 static int callsite_cmp(struct alloc_stat *l, struct alloc_stat *r)
545 if (l->call_site < r->call_site)
547 else if (l->call_site > r->call_site)
552 static struct sort_dimension callsite_sort_dimension = {
557 static int hit_cmp(struct alloc_stat *l, struct alloc_stat *r)
561 else if (l->hit > r->hit)
566 static struct sort_dimension hit_sort_dimension = {
571 static int bytes_cmp(struct alloc_stat *l, struct alloc_stat *r)
573 if (l->bytes_alloc < r->bytes_alloc)
575 else if (l->bytes_alloc > r->bytes_alloc)
580 static struct sort_dimension bytes_sort_dimension = {
585 static int frag_cmp(struct alloc_stat *l, struct alloc_stat *r)
589 x = fragmentation(l->bytes_req, l->bytes_alloc);
590 y = fragmentation(r->bytes_req, r->bytes_alloc);
599 static struct sort_dimension frag_sort_dimension = {
604 static int pingpong_cmp(struct alloc_stat *l, struct alloc_stat *r)
606 if (l->pingpong < r->pingpong)
608 else if (l->pingpong > r->pingpong)
613 static struct sort_dimension pingpong_sort_dimension = {
618 static struct sort_dimension *avail_sorts[] = {
620 &callsite_sort_dimension,
622 &bytes_sort_dimension,
623 &frag_sort_dimension,
624 &pingpong_sort_dimension,
627 #define NUM_AVAIL_SORTS \
628 (int)(sizeof(avail_sorts) / sizeof(struct sort_dimension *))
630 static int sort_dimension__add(const char *tok, struct list_head *list)
632 struct sort_dimension *sort;
635 for (i = 0; i < NUM_AVAIL_SORTS; i++) {
636 if (!strcmp(avail_sorts[i]->name, tok)) {
637 sort = malloc(sizeof(*sort));
640 memcpy(sort, avail_sorts[i], sizeof(*sort));
641 list_add_tail(&sort->list, list);
649 static int setup_sorting(struct list_head *sort_list, const char *arg)
652 char *str = strdup(arg);
658 tok = strsep(&str, ",");
661 if (sort_dimension__add(tok, sort_list) < 0) {
662 error("Unknown --sort key: '%s'", tok);
672 static int parse_sort_opt(const struct option *opt __used,
673 const char *arg, int unset __used)
678 if (caller_flag > alloc_flag)
679 return setup_sorting(&caller_sort, arg);
681 return setup_sorting(&alloc_sort, arg);
686 static int parse_caller_opt(const struct option *opt __used,
687 const char *arg __used, int unset __used)
689 caller_flag = (alloc_flag + 1);
693 static int parse_alloc_opt(const struct option *opt __used,
694 const char *arg __used, int unset __used)
696 alloc_flag = (caller_flag + 1);
700 static int parse_line_opt(const struct option *opt __used,
701 const char *arg, int unset __used)
708 lines = strtoul(arg, NULL, 10);
710 if (caller_flag > alloc_flag)
711 caller_lines = lines;
718 static const struct option kmem_options[] = {
719 OPT_STRING('i', "input", &input_name, "file",
721 OPT_CALLBACK_NOOPT(0, "caller", NULL, NULL,
722 "show per-callsite statistics",
724 OPT_CALLBACK_NOOPT(0, "alloc", NULL, NULL,
725 "show per-allocation statistics",
727 OPT_CALLBACK('s', "sort", NULL, "key[,key2...]",
728 "sort by keys: ptr, call_site, bytes, hit, pingpong, frag",
730 OPT_CALLBACK('l', "line", NULL, "num",
733 OPT_BOOLEAN(0, "raw-ip", &raw_ip, "show raw ip instead of symbol"),
737 static const char *record_args[] = {
743 "-e", "kmem:kmalloc",
744 "-e", "kmem:kmalloc_node",
746 "-e", "kmem:kmem_cache_alloc",
747 "-e", "kmem:kmem_cache_alloc_node",
748 "-e", "kmem:kmem_cache_free",
751 static int __cmd_record(int argc, const char **argv)
753 unsigned int rec_argc, i, j;
754 const char **rec_argv;
756 rec_argc = ARRAY_SIZE(record_args) + argc - 1;
757 rec_argv = calloc(rec_argc + 1, sizeof(char *));
759 if (rec_argv == NULL)
762 for (i = 0; i < ARRAY_SIZE(record_args); i++)
763 rec_argv[i] = strdup(record_args[i]);
765 for (j = 1; j < (unsigned int)argc; j++, i++)
766 rec_argv[i] = argv[j];
768 return cmd_record(i, rec_argv, NULL);
771 int cmd_kmem(int argc, const char **argv, const char *prefix __used)
773 argc = parse_options(argc, argv, kmem_options, kmem_usage, 0);
776 usage_with_options(kmem_usage, kmem_options);
780 if (!strncmp(argv[0], "rec", 3)) {
781 return __cmd_record(argc, argv);
782 } else if (!strcmp(argv[0], "stat")) {
785 if (list_empty(&caller_sort))
786 setup_sorting(&caller_sort, default_sort_order);
787 if (list_empty(&alloc_sort))
788 setup_sorting(&alloc_sort, default_sort_order);
792 usage_with_options(kmem_usage, kmem_options);