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"
17 #include "util/cpumap.h"
19 #include "util/debug.h"
21 #include <linux/rbtree.h>
22 #include <linux/string.h>
25 typedef int (*sort_fn_t)(struct alloc_stat *, struct alloc_stat *);
27 static int alloc_flag;
28 static int caller_flag;
30 static int alloc_lines = -1;
31 static int caller_lines = -1;
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 static int insert_alloc_stat(unsigned long call_site, unsigned long ptr,
57 int bytes_req, int bytes_alloc, int cpu)
59 struct rb_node **node = &root_alloc_stat.rb_node;
60 struct rb_node *parent = NULL;
61 struct alloc_stat *data = NULL;
65 data = rb_entry(*node, struct alloc_stat, node);
68 node = &(*node)->rb_right;
69 else if (ptr < data->ptr)
70 node = &(*node)->rb_left;
75 if (data && data->ptr == ptr) {
77 data->bytes_req += bytes_req;
78 data->bytes_alloc += bytes_alloc;
80 data = malloc(sizeof(*data));
82 pr_err("%s: malloc failed\n", __func__);
88 data->bytes_req = bytes_req;
89 data->bytes_alloc = bytes_alloc;
91 rb_link_node(&data->node, parent, node);
92 rb_insert_color(&data->node, &root_alloc_stat);
94 data->call_site = call_site;
95 data->alloc_cpu = cpu;
99 static int insert_caller_stat(unsigned long call_site,
100 int bytes_req, int bytes_alloc)
102 struct rb_node **node = &root_caller_stat.rb_node;
103 struct rb_node *parent = NULL;
104 struct alloc_stat *data = NULL;
108 data = rb_entry(*node, struct alloc_stat, node);
110 if (call_site > data->call_site)
111 node = &(*node)->rb_right;
112 else if (call_site < data->call_site)
113 node = &(*node)->rb_left;
118 if (data && data->call_site == call_site) {
120 data->bytes_req += bytes_req;
121 data->bytes_alloc += bytes_alloc;
123 data = malloc(sizeof(*data));
125 pr_err("%s: malloc failed\n", __func__);
128 data->call_site = call_site;
131 data->bytes_req = bytes_req;
132 data->bytes_alloc = bytes_alloc;
134 rb_link_node(&data->node, parent, node);
135 rb_insert_color(&data->node, &root_caller_stat);
141 static int perf_evsel__process_alloc_event(struct perf_evsel *evsel,
142 struct perf_sample *sample)
144 unsigned long ptr = perf_evsel__intval(evsel, sample, "ptr"),
145 call_site = perf_evsel__intval(evsel, sample, "call_site");
146 int bytes_req = perf_evsel__intval(evsel, sample, "bytes_req"),
147 bytes_alloc = perf_evsel__intval(evsel, sample, "bytes_alloc");
149 if (insert_alloc_stat(call_site, ptr, bytes_req, bytes_alloc, sample->cpu) ||
150 insert_caller_stat(call_site, bytes_req, bytes_alloc))
153 total_requested += bytes_req;
154 total_allocated += bytes_alloc;
160 static int perf_evsel__process_alloc_node_event(struct perf_evsel *evsel,
161 struct perf_sample *sample)
163 int ret = perf_evsel__process_alloc_event(evsel, sample);
166 int node1 = cpu__get_node(sample->cpu),
167 node2 = perf_evsel__intval(evsel, sample, "node");
176 static int ptr_cmp(struct alloc_stat *, struct alloc_stat *);
177 static int callsite_cmp(struct alloc_stat *, struct alloc_stat *);
179 static struct alloc_stat *search_alloc_stat(unsigned long ptr,
180 unsigned long call_site,
181 struct rb_root *root,
184 struct rb_node *node = root->rb_node;
185 struct alloc_stat key = { .ptr = ptr, .call_site = call_site };
188 struct alloc_stat *data;
191 data = rb_entry(node, struct alloc_stat, node);
193 cmp = sort_fn(&key, data);
195 node = node->rb_left;
197 node = node->rb_right;
204 static int perf_evsel__process_free_event(struct perf_evsel *evsel,
205 struct perf_sample *sample)
207 unsigned long ptr = perf_evsel__intval(evsel, sample, "ptr");
208 struct alloc_stat *s_alloc, *s_caller;
210 s_alloc = search_alloc_stat(ptr, 0, &root_alloc_stat, ptr_cmp);
214 if ((short)sample->cpu != s_alloc->alloc_cpu) {
217 s_caller = search_alloc_stat(0, s_alloc->call_site,
218 &root_caller_stat, callsite_cmp);
221 s_caller->pingpong++;
223 s_alloc->alloc_cpu = -1;
228 typedef int (*tracepoint_handler)(struct perf_evsel *evsel,
229 struct perf_sample *sample);
231 static int process_sample_event(struct perf_tool *tool __maybe_unused,
232 union perf_event *event,
233 struct perf_sample *sample,
234 struct perf_evsel *evsel,
235 struct machine *machine)
237 struct thread *thread = machine__findnew_thread(machine, sample->pid,
240 if (thread == NULL) {
241 pr_debug("problem processing %d event, skipping it.\n",
246 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
248 if (evsel->handler != NULL) {
249 tracepoint_handler f = evsel->handler;
250 return f(evsel, sample);
256 static struct perf_tool perf_kmem = {
257 .sample = process_sample_event,
258 .comm = perf_event__process_comm,
259 .mmap = perf_event__process_mmap,
260 .mmap2 = perf_event__process_mmap2,
261 .ordered_events = true,
264 static double fragmentation(unsigned long n_req, unsigned long n_alloc)
269 return 100.0 - (100.0 * n_req / n_alloc);
272 static void __print_result(struct rb_root *root, struct perf_session *session,
273 int n_lines, int is_caller)
275 struct rb_node *next;
276 struct machine *machine = &session->machines.host;
278 printf("%.102s\n", graph_dotted_line);
279 printf(" %-34s |", is_caller ? "Callsite": "Alloc Ptr");
280 printf(" Total_alloc/Per | Total_req/Per | Hit | Ping-pong | Frag\n");
281 printf("%.102s\n", graph_dotted_line);
283 next = rb_first(root);
285 while (next && n_lines--) {
286 struct alloc_stat *data = rb_entry(next, struct alloc_stat,
288 struct symbol *sym = NULL;
294 addr = data->call_site;
296 sym = machine__find_kernel_function(machine, addr, &map, NULL);
301 snprintf(buf, sizeof(buf), "%s+%" PRIx64 "", sym->name,
302 addr - map->unmap_ip(map, sym->start));
304 snprintf(buf, sizeof(buf), "%#" PRIx64 "", addr);
305 printf(" %-34s |", buf);
307 printf(" %9llu/%-5lu | %9llu/%-5lu | %8lu | %8lu | %6.3f%%\n",
308 (unsigned long long)data->bytes_alloc,
309 (unsigned long)data->bytes_alloc / data->hit,
310 (unsigned long long)data->bytes_req,
311 (unsigned long)data->bytes_req / data->hit,
312 (unsigned long)data->hit,
313 (unsigned long)data->pingpong,
314 fragmentation(data->bytes_req, data->bytes_alloc));
316 next = rb_next(next);
320 printf(" ... | ... | ... | ... | ... | ... \n");
322 printf("%.102s\n", graph_dotted_line);
325 static void print_summary(void)
327 printf("\nSUMMARY\n=======\n");
328 printf("Total bytes requested: %lu\n", total_requested);
329 printf("Total bytes allocated: %lu\n", total_allocated);
330 printf("Total bytes wasted on internal fragmentation: %lu\n",
331 total_allocated - total_requested);
332 printf("Internal fragmentation: %f%%\n",
333 fragmentation(total_requested, total_allocated));
334 printf("Cross CPU allocations: %lu/%lu\n", nr_cross_allocs, nr_allocs);
337 static void print_result(struct perf_session *session)
340 __print_result(&root_caller_sorted, session, caller_lines, 1);
342 __print_result(&root_alloc_sorted, session, alloc_lines, 0);
346 struct sort_dimension {
349 struct list_head list;
352 static LIST_HEAD(caller_sort);
353 static LIST_HEAD(alloc_sort);
355 static void sort_insert(struct rb_root *root, struct alloc_stat *data,
356 struct list_head *sort_list)
358 struct rb_node **new = &(root->rb_node);
359 struct rb_node *parent = NULL;
360 struct sort_dimension *sort;
363 struct alloc_stat *this;
366 this = rb_entry(*new, struct alloc_stat, node);
369 list_for_each_entry(sort, sort_list, list) {
370 cmp = sort->cmp(data, this);
376 new = &((*new)->rb_left);
378 new = &((*new)->rb_right);
381 rb_link_node(&data->node, parent, new);
382 rb_insert_color(&data->node, root);
385 static void __sort_result(struct rb_root *root, struct rb_root *root_sorted,
386 struct list_head *sort_list)
388 struct rb_node *node;
389 struct alloc_stat *data;
392 node = rb_first(root);
396 rb_erase(node, root);
397 data = rb_entry(node, struct alloc_stat, node);
398 sort_insert(root_sorted, data, sort_list);
402 static void sort_result(void)
404 __sort_result(&root_alloc_stat, &root_alloc_sorted, &alloc_sort);
405 __sort_result(&root_caller_stat, &root_caller_sorted, &caller_sort);
408 static int __cmd_kmem(struct perf_session *session)
411 const struct perf_evsel_str_handler kmem_tracepoints[] = {
412 { "kmem:kmalloc", perf_evsel__process_alloc_event, },
413 { "kmem:kmem_cache_alloc", perf_evsel__process_alloc_event, },
414 { "kmem:kmalloc_node", perf_evsel__process_alloc_node_event, },
415 { "kmem:kmem_cache_alloc_node", perf_evsel__process_alloc_node_event, },
416 { "kmem:kfree", perf_evsel__process_free_event, },
417 { "kmem:kmem_cache_free", perf_evsel__process_free_event, },
420 if (!perf_session__has_traces(session, "kmem record"))
423 if (perf_session__set_tracepoints_handlers(session, kmem_tracepoints)) {
424 pr_err("Initializing perf session tracepoint handlers failed\n");
429 err = perf_session__process_events(session, &perf_kmem);
433 print_result(session);
438 static int ptr_cmp(struct alloc_stat *l, struct alloc_stat *r)
442 else if (l->ptr > r->ptr)
447 static struct sort_dimension ptr_sort_dimension = {
452 static int callsite_cmp(struct alloc_stat *l, struct alloc_stat *r)
454 if (l->call_site < r->call_site)
456 else if (l->call_site > r->call_site)
461 static struct sort_dimension callsite_sort_dimension = {
466 static int hit_cmp(struct alloc_stat *l, struct alloc_stat *r)
470 else if (l->hit > r->hit)
475 static struct sort_dimension hit_sort_dimension = {
480 static int bytes_cmp(struct alloc_stat *l, struct alloc_stat *r)
482 if (l->bytes_alloc < r->bytes_alloc)
484 else if (l->bytes_alloc > r->bytes_alloc)
489 static struct sort_dimension bytes_sort_dimension = {
494 static int frag_cmp(struct alloc_stat *l, struct alloc_stat *r)
498 x = fragmentation(l->bytes_req, l->bytes_alloc);
499 y = fragmentation(r->bytes_req, r->bytes_alloc);
508 static struct sort_dimension frag_sort_dimension = {
513 static int pingpong_cmp(struct alloc_stat *l, struct alloc_stat *r)
515 if (l->pingpong < r->pingpong)
517 else if (l->pingpong > r->pingpong)
522 static struct sort_dimension pingpong_sort_dimension = {
527 static struct sort_dimension *avail_sorts[] = {
529 &callsite_sort_dimension,
531 &bytes_sort_dimension,
532 &frag_sort_dimension,
533 &pingpong_sort_dimension,
536 #define NUM_AVAIL_SORTS ((int)ARRAY_SIZE(avail_sorts))
538 static int sort_dimension__add(const char *tok, struct list_head *list)
540 struct sort_dimension *sort;
543 for (i = 0; i < NUM_AVAIL_SORTS; i++) {
544 if (!strcmp(avail_sorts[i]->name, tok)) {
545 sort = memdup(avail_sorts[i], sizeof(*avail_sorts[i]));
547 pr_err("%s: memdup failed\n", __func__);
550 list_add_tail(&sort->list, list);
558 static int setup_sorting(struct list_head *sort_list, const char *arg)
561 char *str = strdup(arg);
564 pr_err("%s: strdup failed\n", __func__);
569 tok = strsep(&str, ",");
572 if (sort_dimension__add(tok, sort_list) < 0) {
573 error("Unknown --sort key: '%s'", tok);
583 static int parse_sort_opt(const struct option *opt __maybe_unused,
584 const char *arg, int unset __maybe_unused)
589 if (caller_flag > alloc_flag)
590 return setup_sorting(&caller_sort, arg);
592 return setup_sorting(&alloc_sort, arg);
597 static int parse_caller_opt(const struct option *opt __maybe_unused,
598 const char *arg __maybe_unused,
599 int unset __maybe_unused)
601 caller_flag = (alloc_flag + 1);
605 static int parse_alloc_opt(const struct option *opt __maybe_unused,
606 const char *arg __maybe_unused,
607 int unset __maybe_unused)
609 alloc_flag = (caller_flag + 1);
613 static int parse_line_opt(const struct option *opt __maybe_unused,
614 const char *arg, int unset __maybe_unused)
621 lines = strtoul(arg, NULL, 10);
623 if (caller_flag > alloc_flag)
624 caller_lines = lines;
631 static int __cmd_record(int argc, const char **argv)
633 const char * const record_args[] = {
634 "record", "-a", "-R", "-c", "1",
635 "-e", "kmem:kmalloc",
636 "-e", "kmem:kmalloc_node",
638 "-e", "kmem:kmem_cache_alloc",
639 "-e", "kmem:kmem_cache_alloc_node",
640 "-e", "kmem:kmem_cache_free",
642 unsigned int rec_argc, i, j;
643 const char **rec_argv;
645 rec_argc = ARRAY_SIZE(record_args) + argc - 1;
646 rec_argv = calloc(rec_argc + 1, sizeof(char *));
648 if (rec_argv == NULL)
651 for (i = 0; i < ARRAY_SIZE(record_args); i++)
652 rec_argv[i] = strdup(record_args[i]);
654 for (j = 1; j < (unsigned int)argc; j++, i++)
655 rec_argv[i] = argv[j];
657 return cmd_record(i, rec_argv, NULL);
660 int cmd_kmem(int argc, const char **argv, const char *prefix __maybe_unused)
662 const char * const default_sort_order = "frag,hit,bytes";
663 const struct option kmem_options[] = {
664 OPT_STRING('i', "input", &input_name, "file", "input file name"),
665 OPT_CALLBACK_NOOPT(0, "caller", NULL, NULL,
666 "show per-callsite statistics", parse_caller_opt),
667 OPT_CALLBACK_NOOPT(0, "alloc", NULL, NULL,
668 "show per-allocation statistics", parse_alloc_opt),
669 OPT_CALLBACK('s', "sort", NULL, "key[,key2...]",
670 "sort by keys: ptr, call_site, bytes, hit, pingpong, frag",
672 OPT_CALLBACK('l', "line", NULL, "num", "show n lines", parse_line_opt),
673 OPT_BOOLEAN(0, "raw-ip", &raw_ip, "show raw ip instead of symbol"),
676 const char *const kmem_subcommands[] = { "record", "stat", NULL };
677 const char *kmem_usage[] = {
681 struct perf_session *session;
682 struct perf_data_file file = {
684 .mode = PERF_DATA_MODE_READ,
688 argc = parse_options_subcommand(argc, argv, kmem_options,
689 kmem_subcommands, kmem_usage, 0);
692 usage_with_options(kmem_usage, kmem_options);
694 if (!strncmp(argv[0], "rec", 3)) {
696 return __cmd_record(argc, argv);
699 session = perf_session__new(&file, false, &perf_kmem);
703 symbol__init(&session->header.env);
705 if (!strcmp(argv[0], "stat")) {
706 if (cpu__setup_cpunode_map())
709 if (list_empty(&caller_sort))
710 setup_sorting(&caller_sort, default_sort_order);
711 if (list_empty(&alloc_sort))
712 setup_sorting(&alloc_sort, default_sort_order);
714 ret = __cmd_kmem(session);
716 usage_with_options(kmem_usage, kmem_options);
719 perf_session__delete(session);