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>
20 #include <linux/string.h>
23 typedef int (*sort_fn_t
)(struct alloc_stat
*, struct alloc_stat
*);
25 static int alloc_flag
;
26 static int caller_flag
;
28 static int alloc_lines
= -1;
29 static int caller_lines
= -1;
33 static int *cpunode_map
;
34 static int max_cpu_num
;
49 static struct rb_root root_alloc_stat
;
50 static struct rb_root root_alloc_sorted
;
51 static struct rb_root root_caller_stat
;
52 static struct rb_root root_caller_sorted
;
54 static unsigned long total_requested
, total_allocated
;
55 static unsigned long nr_allocs
, nr_cross_allocs
;
57 #define PATH_SYS_NODE "/sys/devices/system/node"
59 static int init_cpunode_map(void)
64 fp
= fopen("/sys/devices/system/cpu/kernel_max", "r");
70 if (fscanf(fp
, "%d", &max_cpu_num
) < 1) {
71 pr_err("Failed to read 'kernel_max' from sysfs");
77 cpunode_map
= calloc(max_cpu_num
, sizeof(int));
79 pr_err("%s: calloc failed\n", __func__
);
83 for (i
= 0; i
< max_cpu_num
; i
++)
92 static int setup_cpunode_map(void)
94 struct dirent
*dent1
, *dent2
;
96 unsigned int cpu
, mem
;
99 if (init_cpunode_map())
102 dir1
= opendir(PATH_SYS_NODE
);
106 while ((dent1
= readdir(dir1
)) != NULL
) {
107 if (dent1
->d_type
!= DT_DIR
||
108 sscanf(dent1
->d_name
, "node%u", &mem
) < 1)
111 snprintf(buf
, PATH_MAX
, "%s/%s", PATH_SYS_NODE
, dent1
->d_name
);
115 while ((dent2
= readdir(dir2
)) != NULL
) {
116 if (dent2
->d_type
!= DT_LNK
||
117 sscanf(dent2
->d_name
, "cpu%u", &cpu
) < 1)
119 cpunode_map
[cpu
] = mem
;
127 static int insert_alloc_stat(unsigned long call_site
, unsigned long ptr
,
128 int bytes_req
, int bytes_alloc
, int cpu
)
130 struct rb_node
**node
= &root_alloc_stat
.rb_node
;
131 struct rb_node
*parent
= NULL
;
132 struct alloc_stat
*data
= NULL
;
136 data
= rb_entry(*node
, struct alloc_stat
, node
);
139 node
= &(*node
)->rb_right
;
140 else if (ptr
< data
->ptr
)
141 node
= &(*node
)->rb_left
;
146 if (data
&& data
->ptr
== ptr
) {
148 data
->bytes_req
+= bytes_req
;
149 data
->bytes_alloc
+= bytes_alloc
;
151 data
= malloc(sizeof(*data
));
153 pr_err("%s: malloc failed\n", __func__
);
159 data
->bytes_req
= bytes_req
;
160 data
->bytes_alloc
= bytes_alloc
;
162 rb_link_node(&data
->node
, parent
, node
);
163 rb_insert_color(&data
->node
, &root_alloc_stat
);
165 data
->call_site
= call_site
;
166 data
->alloc_cpu
= cpu
;
170 static int insert_caller_stat(unsigned long call_site
,
171 int bytes_req
, int bytes_alloc
)
173 struct rb_node
**node
= &root_caller_stat
.rb_node
;
174 struct rb_node
*parent
= NULL
;
175 struct alloc_stat
*data
= NULL
;
179 data
= rb_entry(*node
, struct alloc_stat
, node
);
181 if (call_site
> data
->call_site
)
182 node
= &(*node
)->rb_right
;
183 else if (call_site
< data
->call_site
)
184 node
= &(*node
)->rb_left
;
189 if (data
&& data
->call_site
== call_site
) {
191 data
->bytes_req
+= bytes_req
;
192 data
->bytes_alloc
+= bytes_alloc
;
194 data
= malloc(sizeof(*data
));
196 pr_err("%s: malloc failed\n", __func__
);
199 data
->call_site
= call_site
;
202 data
->bytes_req
= bytes_req
;
203 data
->bytes_alloc
= bytes_alloc
;
205 rb_link_node(&data
->node
, parent
, node
);
206 rb_insert_color(&data
->node
, &root_caller_stat
);
212 static int perf_evsel__process_alloc_event(struct perf_evsel
*evsel
,
213 struct perf_sample
*sample
)
215 unsigned long ptr
= perf_evsel__intval(evsel
, sample
, "ptr"),
216 call_site
= perf_evsel__intval(evsel
, sample
, "call_site");
217 int bytes_req
= perf_evsel__intval(evsel
, sample
, "bytes_req"),
218 bytes_alloc
= perf_evsel__intval(evsel
, sample
, "bytes_alloc");
220 if (insert_alloc_stat(call_site
, ptr
, bytes_req
, bytes_alloc
, sample
->cpu
) ||
221 insert_caller_stat(call_site
, bytes_req
, bytes_alloc
))
224 total_requested
+= bytes_req
;
225 total_allocated
+= bytes_alloc
;
231 static int perf_evsel__process_alloc_node_event(struct perf_evsel
*evsel
,
232 struct perf_sample
*sample
)
234 int ret
= perf_evsel__process_alloc_event(evsel
, sample
);
237 int node1
= cpunode_map
[sample
->cpu
],
238 node2
= perf_evsel__intval(evsel
, sample
, "node");
247 static int ptr_cmp(struct alloc_stat
*, struct alloc_stat
*);
248 static int callsite_cmp(struct alloc_stat
*, struct alloc_stat
*);
250 static struct alloc_stat
*search_alloc_stat(unsigned long ptr
,
251 unsigned long call_site
,
252 struct rb_root
*root
,
255 struct rb_node
*node
= root
->rb_node
;
256 struct alloc_stat key
= { .ptr
= ptr
, .call_site
= call_site
};
259 struct alloc_stat
*data
;
262 data
= rb_entry(node
, struct alloc_stat
, node
);
264 cmp
= sort_fn(&key
, data
);
266 node
= node
->rb_left
;
268 node
= node
->rb_right
;
275 static int perf_evsel__process_free_event(struct perf_evsel
*evsel
,
276 struct perf_sample
*sample
)
278 unsigned long ptr
= perf_evsel__intval(evsel
, sample
, "ptr");
279 struct alloc_stat
*s_alloc
, *s_caller
;
281 s_alloc
= search_alloc_stat(ptr
, 0, &root_alloc_stat
, ptr_cmp
);
285 if ((short)sample
->cpu
!= s_alloc
->alloc_cpu
) {
288 s_caller
= search_alloc_stat(0, s_alloc
->call_site
,
289 &root_caller_stat
, callsite_cmp
);
292 s_caller
->pingpong
++;
294 s_alloc
->alloc_cpu
= -1;
299 typedef int (*tracepoint_handler
)(struct perf_evsel
*evsel
,
300 struct perf_sample
*sample
);
302 static int process_sample_event(struct perf_tool
*tool __maybe_unused
,
303 union perf_event
*event
,
304 struct perf_sample
*sample
,
305 struct perf_evsel
*evsel
,
306 struct machine
*machine
)
308 struct thread
*thread
= machine__findnew_thread(machine
, sample
->pid
,
311 if (thread
== NULL
) {
312 pr_debug("problem processing %d event, skipping it.\n",
317 dump_printf(" ... thread: %s:%d\n", thread
->comm
, thread
->tid
);
319 if (evsel
->handler
.func
!= NULL
) {
320 tracepoint_handler f
= evsel
->handler
.func
;
321 return f(evsel
, sample
);
327 static struct perf_tool perf_kmem
= {
328 .sample
= process_sample_event
,
329 .comm
= perf_event__process_comm
,
330 .ordered_samples
= true,
333 static double fragmentation(unsigned long n_req
, unsigned long n_alloc
)
338 return 100.0 - (100.0 * n_req
/ n_alloc
);
341 static void __print_result(struct rb_root
*root
, struct perf_session
*session
,
342 int n_lines
, int is_caller
)
344 struct rb_node
*next
;
345 struct machine
*machine
= &session
->machines
.host
;
347 printf("%.102s\n", graph_dotted_line
);
348 printf(" %-34s |", is_caller
? "Callsite": "Alloc Ptr");
349 printf(" Total_alloc/Per | Total_req/Per | Hit | Ping-pong | Frag\n");
350 printf("%.102s\n", graph_dotted_line
);
352 next
= rb_first(root
);
354 while (next
&& n_lines
--) {
355 struct alloc_stat
*data
= rb_entry(next
, struct alloc_stat
,
357 struct symbol
*sym
= NULL
;
363 addr
= data
->call_site
;
365 sym
= machine__find_kernel_function(machine
, addr
, &map
, NULL
);
370 snprintf(buf
, sizeof(buf
), "%s+%" PRIx64
"", sym
->name
,
371 addr
- map
->unmap_ip(map
, sym
->start
));
373 snprintf(buf
, sizeof(buf
), "%#" PRIx64
"", addr
);
374 printf(" %-34s |", buf
);
376 printf(" %9llu/%-5lu | %9llu/%-5lu | %8lu | %8lu | %6.3f%%\n",
377 (unsigned long long)data
->bytes_alloc
,
378 (unsigned long)data
->bytes_alloc
/ data
->hit
,
379 (unsigned long long)data
->bytes_req
,
380 (unsigned long)data
->bytes_req
/ data
->hit
,
381 (unsigned long)data
->hit
,
382 (unsigned long)data
->pingpong
,
383 fragmentation(data
->bytes_req
, data
->bytes_alloc
));
385 next
= rb_next(next
);
389 printf(" ... | ... | ... | ... | ... | ... \n");
391 printf("%.102s\n", graph_dotted_line
);
394 static void print_summary(void)
396 printf("\nSUMMARY\n=======\n");
397 printf("Total bytes requested: %lu\n", total_requested
);
398 printf("Total bytes allocated: %lu\n", total_allocated
);
399 printf("Total bytes wasted on internal fragmentation: %lu\n",
400 total_allocated
- total_requested
);
401 printf("Internal fragmentation: %f%%\n",
402 fragmentation(total_requested
, total_allocated
));
403 printf("Cross CPU allocations: %lu/%lu\n", nr_cross_allocs
, nr_allocs
);
406 static void print_result(struct perf_session
*session
)
409 __print_result(&root_caller_sorted
, session
, caller_lines
, 1);
411 __print_result(&root_alloc_sorted
, session
, alloc_lines
, 0);
415 struct sort_dimension
{
418 struct list_head list
;
421 static LIST_HEAD(caller_sort
);
422 static LIST_HEAD(alloc_sort
);
424 static void sort_insert(struct rb_root
*root
, struct alloc_stat
*data
,
425 struct list_head
*sort_list
)
427 struct rb_node
**new = &(root
->rb_node
);
428 struct rb_node
*parent
= NULL
;
429 struct sort_dimension
*sort
;
432 struct alloc_stat
*this;
435 this = rb_entry(*new, struct alloc_stat
, node
);
438 list_for_each_entry(sort
, sort_list
, list
) {
439 cmp
= sort
->cmp(data
, this);
445 new = &((*new)->rb_left
);
447 new = &((*new)->rb_right
);
450 rb_link_node(&data
->node
, parent
, new);
451 rb_insert_color(&data
->node
, root
);
454 static void __sort_result(struct rb_root
*root
, struct rb_root
*root_sorted
,
455 struct list_head
*sort_list
)
457 struct rb_node
*node
;
458 struct alloc_stat
*data
;
461 node
= rb_first(root
);
465 rb_erase(node
, root
);
466 data
= rb_entry(node
, struct alloc_stat
, node
);
467 sort_insert(root_sorted
, data
, sort_list
);
471 static void sort_result(void)
473 __sort_result(&root_alloc_stat
, &root_alloc_sorted
, &alloc_sort
);
474 __sort_result(&root_caller_stat
, &root_caller_sorted
, &caller_sort
);
477 static int __cmd_kmem(void)
480 struct perf_session
*session
;
481 const struct perf_evsel_str_handler kmem_tracepoints
[] = {
482 { "kmem:kmalloc", perf_evsel__process_alloc_event
, },
483 { "kmem:kmem_cache_alloc", perf_evsel__process_alloc_event
, },
484 { "kmem:kmalloc_node", perf_evsel__process_alloc_node_event
, },
485 { "kmem:kmem_cache_alloc_node", perf_evsel__process_alloc_node_event
, },
486 { "kmem:kfree", perf_evsel__process_free_event
, },
487 { "kmem:kmem_cache_free", perf_evsel__process_free_event
, },
490 session
= perf_session__new(input_name
, O_RDONLY
, 0, false, &perf_kmem
);
494 if (perf_session__create_kernel_maps(session
) < 0)
497 if (!perf_session__has_traces(session
, "kmem record"))
500 if (perf_session__set_tracepoints_handlers(session
, kmem_tracepoints
)) {
501 pr_err("Initializing perf session tracepoint handlers failed\n");
506 err
= perf_session__process_events(session
, &perf_kmem
);
510 print_result(session
);
512 perf_session__delete(session
);
516 static int ptr_cmp(struct alloc_stat
*l
, struct alloc_stat
*r
)
520 else if (l
->ptr
> r
->ptr
)
525 static struct sort_dimension ptr_sort_dimension
= {
530 static int callsite_cmp(struct alloc_stat
*l
, struct alloc_stat
*r
)
532 if (l
->call_site
< r
->call_site
)
534 else if (l
->call_site
> r
->call_site
)
539 static struct sort_dimension callsite_sort_dimension
= {
544 static int hit_cmp(struct alloc_stat
*l
, struct alloc_stat
*r
)
548 else if (l
->hit
> r
->hit
)
553 static struct sort_dimension hit_sort_dimension
= {
558 static int bytes_cmp(struct alloc_stat
*l
, struct alloc_stat
*r
)
560 if (l
->bytes_alloc
< r
->bytes_alloc
)
562 else if (l
->bytes_alloc
> r
->bytes_alloc
)
567 static struct sort_dimension bytes_sort_dimension
= {
572 static int frag_cmp(struct alloc_stat
*l
, struct alloc_stat
*r
)
576 x
= fragmentation(l
->bytes_req
, l
->bytes_alloc
);
577 y
= fragmentation(r
->bytes_req
, r
->bytes_alloc
);
586 static struct sort_dimension frag_sort_dimension
= {
591 static int pingpong_cmp(struct alloc_stat
*l
, struct alloc_stat
*r
)
593 if (l
->pingpong
< r
->pingpong
)
595 else if (l
->pingpong
> r
->pingpong
)
600 static struct sort_dimension pingpong_sort_dimension
= {
605 static struct sort_dimension
*avail_sorts
[] = {
607 &callsite_sort_dimension
,
609 &bytes_sort_dimension
,
610 &frag_sort_dimension
,
611 &pingpong_sort_dimension
,
614 #define NUM_AVAIL_SORTS ((int)ARRAY_SIZE(avail_sorts))
616 static int sort_dimension__add(const char *tok
, struct list_head
*list
)
618 struct sort_dimension
*sort
;
621 for (i
= 0; i
< NUM_AVAIL_SORTS
; i
++) {
622 if (!strcmp(avail_sorts
[i
]->name
, tok
)) {
623 sort
= memdup(avail_sorts
[i
], sizeof(*avail_sorts
[i
]));
625 pr_err("%s: memdup failed\n", __func__
);
628 list_add_tail(&sort
->list
, list
);
636 static int setup_sorting(struct list_head
*sort_list
, const char *arg
)
639 char *str
= strdup(arg
);
642 pr_err("%s: strdup failed\n", __func__
);
647 tok
= strsep(&str
, ",");
650 if (sort_dimension__add(tok
, sort_list
) < 0) {
651 error("Unknown --sort key: '%s'", tok
);
661 static int parse_sort_opt(const struct option
*opt __maybe_unused
,
662 const char *arg
, int unset __maybe_unused
)
667 if (caller_flag
> alloc_flag
)
668 return setup_sorting(&caller_sort
, arg
);
670 return setup_sorting(&alloc_sort
, arg
);
675 static int parse_caller_opt(const struct option
*opt __maybe_unused
,
676 const char *arg __maybe_unused
,
677 int unset __maybe_unused
)
679 caller_flag
= (alloc_flag
+ 1);
683 static int parse_alloc_opt(const struct option
*opt __maybe_unused
,
684 const char *arg __maybe_unused
,
685 int unset __maybe_unused
)
687 alloc_flag
= (caller_flag
+ 1);
691 static int parse_line_opt(const struct option
*opt __maybe_unused
,
692 const char *arg
, int unset __maybe_unused
)
699 lines
= strtoul(arg
, NULL
, 10);
701 if (caller_flag
> alloc_flag
)
702 caller_lines
= lines
;
709 static int __cmd_record(int argc
, const char **argv
)
711 const char * const record_args
[] = {
712 "record", "-a", "-R", "-c", "1",
713 "-e", "kmem:kmalloc",
714 "-e", "kmem:kmalloc_node",
716 "-e", "kmem:kmem_cache_alloc",
717 "-e", "kmem:kmem_cache_alloc_node",
718 "-e", "kmem:kmem_cache_free",
720 unsigned int rec_argc
, i
, j
;
721 const char **rec_argv
;
723 rec_argc
= ARRAY_SIZE(record_args
) + argc
- 1;
724 rec_argv
= calloc(rec_argc
+ 1, sizeof(char *));
726 if (rec_argv
== NULL
)
729 for (i
= 0; i
< ARRAY_SIZE(record_args
); i
++)
730 rec_argv
[i
] = strdup(record_args
[i
]);
732 for (j
= 1; j
< (unsigned int)argc
; j
++, i
++)
733 rec_argv
[i
] = argv
[j
];
735 return cmd_record(i
, rec_argv
, NULL
);
738 int cmd_kmem(int argc
, const char **argv
, const char *prefix __maybe_unused
)
740 const char * const default_sort_order
= "frag,hit,bytes";
741 const struct option kmem_options
[] = {
742 OPT_STRING('i', "input", &input_name
, "file", "input file name"),
743 OPT_CALLBACK_NOOPT(0, "caller", NULL
, NULL
,
744 "show per-callsite statistics", parse_caller_opt
),
745 OPT_CALLBACK_NOOPT(0, "alloc", NULL
, NULL
,
746 "show per-allocation statistics", parse_alloc_opt
),
747 OPT_CALLBACK('s', "sort", NULL
, "key[,key2...]",
748 "sort by keys: ptr, call_site, bytes, hit, pingpong, frag",
750 OPT_CALLBACK('l', "line", NULL
, "num", "show n lines", parse_line_opt
),
751 OPT_BOOLEAN(0, "raw-ip", &raw_ip
, "show raw ip instead of symbol"),
754 const char * const kmem_usage
[] = {
755 "perf kmem [<options>] {record|stat}",
758 argc
= parse_options(argc
, argv
, kmem_options
, kmem_usage
, 0);
761 usage_with_options(kmem_usage
, kmem_options
);
765 if (!strncmp(argv
[0], "rec", 3)) {
766 return __cmd_record(argc
, argv
);
767 } else if (!strcmp(argv
[0], "stat")) {
768 if (setup_cpunode_map())
771 if (list_empty(&caller_sort
))
772 setup_sorting(&caller_sort
, default_sort_order
);
773 if (list_empty(&alloc_sort
))
774 setup_sorting(&alloc_sort
, default_sort_order
);
778 usage_with_options(kmem_usage
, kmem_options
);