4 * Builtin top command: Display a continuously updated profile of
5 * any workload, CPU or specific PID.
7 * Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
8 * 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
10 * Improvements and fixes by:
12 * Arjan van de Ven <arjan@linux.intel.com>
13 * Yanmin Zhang <yanmin.zhang@intel.com>
14 * Wu Fengguang <fengguang.wu@intel.com>
15 * Mike Galbraith <efault@gmx.de>
16 * Paul Mackerras <paulus@samba.org>
18 * Released under the GPL v2. (and only v2, not any later version)
24 #include "util/annotate.h"
25 #include "util/cache.h"
26 #include "util/color.h"
27 #include "util/evlist.h"
28 #include "util/evsel.h"
29 #include "util/session.h"
30 #include "util/symbol.h"
31 #include "util/thread.h"
32 #include "util/thread_map.h"
34 #include "util/util.h"
35 #include <linux/rbtree.h>
36 #include "util/parse-options.h"
37 #include "util/parse-events.h"
38 #include "util/cpumap.h"
39 #include "util/xyarray.h"
40 #include "util/sort.h"
42 #include "util/debug.h"
56 #include <sys/syscall.h>
57 #include <sys/ioctl.h>
59 #include <sys/prctl.h>
64 #include <linux/unistd.h>
65 #include <linux/types.h>
67 static struct perf_top top
= {
72 .freq
= 1000, /* 1 KHz */
75 static bool system_wide
= false;
77 static bool use_tui
, use_stdio
;
79 static bool sort_has_symbols
;
81 static bool dont_use_callchains
;
82 static char callchain_default_opt
[] = "fractal,0.5,callee";
85 static int default_interval
= 0;
87 static bool kptr_restrict_warned
;
88 static bool vmlinux_warned
;
89 static bool inherit
= false;
90 static int realtime_prio
= 0;
91 static bool group
= false;
92 static bool sample_id_all_avail
= true;
93 static unsigned int mmap_pages
= 128;
95 static bool dump_symtab
= false;
97 static struct winsize winsize
;
99 static const char *sym_filter
= NULL
;
100 static int sym_pcnt_filter
= 5;
106 void get_term_dimensions(struct winsize
*ws
)
108 char *s
= getenv("LINES");
111 ws
->ws_row
= atoi(s
);
112 s
= getenv("COLUMNS");
114 ws
->ws_col
= atoi(s
);
115 if (ws
->ws_row
&& ws
->ws_col
)
120 if (ioctl(1, TIOCGWINSZ
, ws
) == 0 &&
121 ws
->ws_row
&& ws
->ws_col
)
128 static void update_print_entries(struct winsize
*ws
)
130 top
.print_entries
= ws
->ws_row
;
132 if (top
.print_entries
> 9)
133 top
.print_entries
-= 9;
136 static void sig_winch_handler(int sig __used
)
138 get_term_dimensions(&winsize
);
139 update_print_entries(&winsize
);
142 static int parse_source(struct hist_entry
*he
)
145 struct annotation
*notes
;
149 if (!he
|| !he
->ms
.sym
)
156 * We can't annotate with just /proc/kallsyms
158 if (map
->dso
->symtab_type
== SYMTAB__KALLSYMS
) {
159 pr_err("Can't annotate %s: No vmlinux file was found in the "
160 "path\n", sym
->name
);
165 notes
= symbol__annotation(sym
);
166 if (notes
->src
!= NULL
) {
167 pthread_mutex_lock(¬es
->lock
);
171 pthread_mutex_lock(¬es
->lock
);
173 if (symbol__alloc_hist(sym
, top
.evlist
->nr_entries
) < 0) {
174 pthread_mutex_unlock(¬es
->lock
);
175 pr_err("Not enough memory for annotating '%s' symbol!\n",
181 err
= symbol__annotate(sym
, map
, 0);
184 top
.sym_filter_entry
= he
;
187 pthread_mutex_unlock(¬es
->lock
);
191 static void __zero_source_counters(struct hist_entry
*he
)
193 struct symbol
*sym
= he
->ms
.sym
;
194 symbol__annotate_zero_histograms(sym
);
197 static void record_precise_ip(struct hist_entry
*he
, int counter
, u64 ip
)
199 struct annotation
*notes
;
202 if (he
== NULL
|| he
->ms
.sym
== NULL
||
203 (he
!= top
.sym_filter_entry
&& use_browser
!= 1))
207 notes
= symbol__annotation(sym
);
209 if (pthread_mutex_trylock(¬es
->lock
))
212 if (notes
->src
== NULL
&&
213 symbol__alloc_hist(sym
, top
.evlist
->nr_entries
) < 0) {
214 pthread_mutex_unlock(¬es
->lock
);
215 pr_err("Not enough memory for annotating '%s' symbol!\n",
221 ip
= he
->ms
.map
->map_ip(he
->ms
.map
, ip
);
222 symbol__inc_addr_samples(sym
, he
->ms
.map
, counter
, ip
);
224 pthread_mutex_unlock(¬es
->lock
);
227 static void show_details(struct hist_entry
*he
)
229 struct annotation
*notes
;
230 struct symbol
*symbol
;
237 notes
= symbol__annotation(symbol
);
239 pthread_mutex_lock(¬es
->lock
);
241 if (notes
->src
== NULL
)
244 printf("Showing %s for %s\n", event_name(top
.sym_evsel
), symbol
->name
);
245 printf(" Events Pcnt (>=%d%%)\n", sym_pcnt_filter
);
247 more
= symbol__annotate_printf(symbol
, he
->ms
.map
, top
.sym_evsel
->idx
,
248 0, sym_pcnt_filter
, top
.print_entries
, 4);
250 symbol__annotate_zero_histogram(symbol
, top
.sym_evsel
->idx
);
252 symbol__annotate_decay_histogram(symbol
, top
.sym_evsel
->idx
);
254 printf("%d lines not displayed, maybe increase display entries [e]\n", more
);
256 pthread_mutex_unlock(¬es
->lock
);
259 static const char CONSOLE_CLEAR
[] = "\e[H\e[2J";
261 static struct hist_entry
*
262 perf_session__add_hist_entry(struct perf_session
*session
,
263 struct addr_location
*al
,
264 struct perf_sample
*sample
,
265 struct perf_evsel
*evsel
)
267 struct hist_entry
*he
;
269 he
= __hists__add_entry(&evsel
->hists
, al
, NULL
, sample
->period
);
273 session
->hists
.stats
.total_period
+= sample
->period
;
274 hists__inc_nr_events(&evsel
->hists
, PERF_RECORD_SAMPLE
);
278 static void print_sym_table(void)
282 const int win_width
= winsize
.ws_col
- 1;
286 perf_top__header_snprintf(&top
, bf
, sizeof(bf
));
289 perf_top__reset_sample_counters(&top
);
291 printf("%-*.*s\n", win_width
, win_width
, graph_dotted_line
);
293 if (top
.sym_evsel
->hists
.stats
.nr_lost_warned
!=
294 top
.sym_evsel
->hists
.stats
.nr_events
[PERF_RECORD_LOST
]) {
295 top
.sym_evsel
->hists
.stats
.nr_lost_warned
=
296 top
.sym_evsel
->hists
.stats
.nr_events
[PERF_RECORD_LOST
];
297 color_fprintf(stdout
, PERF_COLOR_RED
,
298 "WARNING: LOST %d chunks, Check IO/CPU overload",
299 top
.sym_evsel
->hists
.stats
.nr_lost_warned
);
303 if (top
.sym_filter_entry
) {
304 show_details(top
.sym_filter_entry
);
308 hists__collapse_resort_threaded(&top
.sym_evsel
->hists
);
309 hists__output_resort_threaded(&top
.sym_evsel
->hists
);
310 hists__decay_entries_threaded(&top
.sym_evsel
->hists
,
311 top
.hide_user_symbols
,
312 top
.hide_kernel_symbols
);
313 hists__output_recalc_col_len(&top
.sym_evsel
->hists
, winsize
.ws_row
- 3);
315 hists__fprintf(&top
.sym_evsel
->hists
, NULL
, false, false,
316 winsize
.ws_row
- 4 - printed
, win_width
, stdout
);
319 static void prompt_integer(int *target
, const char *msg
)
321 char *buf
= malloc(0), *p
;
325 fprintf(stdout
, "\n%s: ", msg
);
326 if (getline(&buf
, &dummy
, stdin
) < 0)
329 p
= strchr(buf
, '\n');
339 tmp
= strtoul(buf
, NULL
, 10);
345 static void prompt_percent(int *target
, const char *msg
)
349 prompt_integer(&tmp
, msg
);
350 if (tmp
>= 0 && tmp
<= 100)
354 static void prompt_symbol(struct hist_entry
**target
, const char *msg
)
356 char *buf
= malloc(0), *p
;
357 struct hist_entry
*syme
= *target
, *n
, *found
= NULL
;
358 struct rb_node
*next
;
361 /* zero counters of active symbol */
363 __zero_source_counters(syme
);
367 fprintf(stdout
, "\n%s: ", msg
);
368 if (getline(&buf
, &dummy
, stdin
) < 0)
371 p
= strchr(buf
, '\n');
375 next
= rb_first(&top
.sym_evsel
->hists
.entries
);
377 n
= rb_entry(next
, struct hist_entry
, rb_node
);
378 if (n
->ms
.sym
&& !strcmp(buf
, n
->ms
.sym
->name
)) {
382 next
= rb_next(&n
->rb_node
);
386 fprintf(stderr
, "Sorry, %s is not active.\n", buf
);
396 static void print_mapped_keys(void)
400 if (top
.sym_filter_entry
) {
401 struct symbol
*sym
= top
.sym_filter_entry
->ms
.sym
;
405 fprintf(stdout
, "\nMapped keys:\n");
406 fprintf(stdout
, "\t[d] display refresh delay. \t(%d)\n", top
.delay_secs
);
407 fprintf(stdout
, "\t[e] display entries (lines). \t(%d)\n", top
.print_entries
);
409 if (top
.evlist
->nr_entries
> 1)
410 fprintf(stdout
, "\t[E] active event counter. \t(%s)\n", event_name(top
.sym_evsel
));
412 fprintf(stdout
, "\t[f] profile display filter (count). \t(%d)\n", top
.count_filter
);
414 fprintf(stdout
, "\t[F] annotate display filter (percent). \t(%d%%)\n", sym_pcnt_filter
);
415 fprintf(stdout
, "\t[s] annotate symbol. \t(%s)\n", name
?: "NULL");
416 fprintf(stdout
, "\t[S] stop annotation.\n");
419 "\t[K] hide kernel_symbols symbols. \t(%s)\n",
420 top
.hide_kernel_symbols
? "yes" : "no");
422 "\t[U] hide user symbols. \t(%s)\n",
423 top
.hide_user_symbols
? "yes" : "no");
424 fprintf(stdout
, "\t[z] toggle sample zeroing. \t(%d)\n", top
.zero
? 1 : 0);
425 fprintf(stdout
, "\t[qQ] quit.\n");
428 static int key_mapped(int c
)
444 return top
.evlist
->nr_entries
> 1 ? 1 : 0;
452 static void handle_keypress(int c
)
454 if (!key_mapped(c
)) {
455 struct pollfd stdin_poll
= { .fd
= 0, .events
= POLLIN
};
456 struct termios tc
, save
;
459 fprintf(stdout
, "\nEnter selection, or unmapped key to continue: ");
464 tc
.c_lflag
&= ~(ICANON
| ECHO
);
467 tcsetattr(0, TCSANOW
, &tc
);
469 poll(&stdin_poll
, 1, -1);
472 tcsetattr(0, TCSAFLUSH
, &save
);
479 prompt_integer(&top
.delay_secs
, "Enter display delay");
480 if (top
.delay_secs
< 1)
484 prompt_integer(&top
.print_entries
, "Enter display entries (lines)");
485 if (top
.print_entries
== 0) {
486 sig_winch_handler(SIGWINCH
);
487 signal(SIGWINCH
, sig_winch_handler
);
489 signal(SIGWINCH
, SIG_DFL
);
492 if (top
.evlist
->nr_entries
> 1) {
493 /* Select 0 as the default event: */
496 fprintf(stderr
, "\nAvailable events:");
498 list_for_each_entry(top
.sym_evsel
, &top
.evlist
->entries
, node
)
499 fprintf(stderr
, "\n\t%d %s", top
.sym_evsel
->idx
, event_name(top
.sym_evsel
));
501 prompt_integer(&counter
, "Enter details event counter");
503 if (counter
>= top
.evlist
->nr_entries
) {
504 top
.sym_evsel
= list_entry(top
.evlist
->entries
.next
, struct perf_evsel
, node
);
505 fprintf(stderr
, "Sorry, no such event, using %s.\n", event_name(top
.sym_evsel
));
509 list_for_each_entry(top
.sym_evsel
, &top
.evlist
->entries
, node
)
510 if (top
.sym_evsel
->idx
== counter
)
513 top
.sym_evsel
= list_entry(top
.evlist
->entries
.next
, struct perf_evsel
, node
);
516 prompt_integer(&top
.count_filter
, "Enter display event count filter");
519 prompt_percent(&sym_pcnt_filter
, "Enter details display event filter (percent)");
522 top
.hide_kernel_symbols
= !top
.hide_kernel_symbols
;
526 printf("exiting.\n");
528 perf_session__fprintf_dsos(top
.session
, stderr
);
531 prompt_symbol(&top
.sym_filter_entry
, "Enter details symbol");
534 if (!top
.sym_filter_entry
)
537 struct hist_entry
*syme
= top
.sym_filter_entry
;
539 top
.sym_filter_entry
= NULL
;
540 __zero_source_counters(syme
);
544 top
.hide_user_symbols
= !top
.hide_user_symbols
;
547 top
.zero
= !top
.zero
;
554 static void perf_top__sort_new_samples(void *arg
)
556 struct perf_top
*t
= arg
;
557 perf_top__reset_sample_counters(t
);
559 if (t
->evlist
->selected
!= NULL
)
560 t
->sym_evsel
= t
->evlist
->selected
;
562 hists__collapse_resort_threaded(&t
->sym_evsel
->hists
);
563 hists__output_resort_threaded(&t
->sym_evsel
->hists
);
564 hists__decay_entries_threaded(&t
->sym_evsel
->hists
,
565 top
.hide_user_symbols
,
566 top
.hide_kernel_symbols
);
569 static void *display_thread_tui(void *arg __used
)
571 const char *help
= "For a higher level overview, try: perf top --sort comm,dso";
573 perf_top__sort_new_samples(&top
);
574 perf_evlist__tui_browse_hists(top
.evlist
, help
,
575 perf_top__sort_new_samples
,
576 &top
, top
.delay_secs
);
583 static void *display_thread(void *arg __used
)
585 struct pollfd stdin_poll
= { .fd
= 0, .events
= POLLIN
};
586 struct termios tc
, save
;
591 tc
.c_lflag
&= ~(ICANON
| ECHO
);
595 pthread__unblock_sigwinch();
597 delay_msecs
= top
.delay_secs
* 1000;
598 tcsetattr(0, TCSANOW
, &tc
);
605 * Either timeout expired or we got an EINTR due to SIGWINCH,
606 * refresh screen in both cases.
608 switch (poll(&stdin_poll
, 1, delay_msecs
)) {
621 tcsetattr(0, TCSAFLUSH
, &save
);
629 /* Tag samples to be skipped. */
630 static const char *skip_symbols
[] = {
637 "mwait_idle_with_hints",
639 "ppc64_runlatch_off",
640 "pseries_dedicated_idle_sleep",
644 static int symbol_filter(struct map
*map __used
, struct symbol
*sym
)
646 const char *name
= sym
->name
;
650 * ppc64 uses function descriptors and appends a '.' to the
651 * start of every instruction address. Remove it.
656 if (!strcmp(name
, "_text") ||
657 !strcmp(name
, "_etext") ||
658 !strcmp(name
, "_sinittext") ||
659 !strncmp("init_module", name
, 11) ||
660 !strncmp("cleanup_module", name
, 14) ||
661 strstr(name
, "_text_start") ||
662 strstr(name
, "_text_end"))
665 for (i
= 0; skip_symbols
[i
]; i
++) {
666 if (!strcmp(skip_symbols
[i
], name
)) {
675 static void perf_event__process_sample(const union perf_event
*event
,
676 struct perf_evsel
*evsel
,
677 struct perf_sample
*sample
,
678 struct perf_session
*session
)
680 struct symbol
*parent
= NULL
;
681 u64 ip
= event
->ip
.ip
;
682 struct addr_location al
;
683 struct machine
*machine
;
685 u8 origin
= event
->header
.misc
& PERF_RECORD_MISC_CPUMODE_MASK
;
690 case PERF_RECORD_MISC_USER
:
692 if (top
.hide_user_symbols
)
694 machine
= perf_session__find_host_machine(session
);
696 case PERF_RECORD_MISC_KERNEL
:
697 ++top
.kernel_samples
;
698 if (top
.hide_kernel_symbols
)
700 machine
= perf_session__find_host_machine(session
);
702 case PERF_RECORD_MISC_GUEST_KERNEL
:
703 ++top
.guest_kernel_samples
;
704 machine
= perf_session__find_machine(session
, event
->ip
.pid
);
706 case PERF_RECORD_MISC_GUEST_USER
:
707 ++top
.guest_us_samples
;
709 * TODO: we don't process guest user from host side
710 * except simple counting.
717 if (!machine
&& perf_guest
) {
718 pr_err("Can't find guest [%d]'s kernel information\n",
723 if (event
->header
.misc
& PERF_RECORD_MISC_EXACT_IP
)
726 if (perf_event__preprocess_sample(event
, session
, &al
, sample
,
727 symbol_filter
) < 0 ||
731 if (!kptr_restrict_warned
&&
732 symbol_conf
.kptr_restrict
&&
733 al
.cpumode
== PERF_RECORD_MISC_KERNEL
) {
735 "Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
736 "Check /proc/sys/kernel/kptr_restrict.\n\n"
737 "Kernel%s samples will not be resolved.\n",
738 !RB_EMPTY_ROOT(&al
.map
->dso
->symbols
[MAP__FUNCTION
]) ?
740 if (use_browser
<= 0)
742 kptr_restrict_warned
= true;
745 if (al
.sym
== NULL
) {
746 const char *msg
= "Kernel samples will not be resolved.\n";
748 * As we do lazy loading of symtabs we only will know if the
749 * specified vmlinux file is invalid when we actually have a
750 * hit in kernel space and then try to load it. So if we get
751 * here and there are _no_ symbols in the DSO backing the
752 * kernel map, bail out.
754 * We may never get here, for instance, if we use -K/
755 * --hide-kernel-symbols, even if the user specifies an
756 * invalid --vmlinux ;-)
758 if (!kptr_restrict_warned
&& !vmlinux_warned
&&
759 al
.map
== machine
->vmlinux_maps
[MAP__FUNCTION
] &&
760 RB_EMPTY_ROOT(&al
.map
->dso
->symbols
[MAP__FUNCTION
])) {
761 if (symbol_conf
.vmlinux_name
) {
762 ui__warning("The %s file can't be used.\n%s",
763 symbol_conf
.vmlinux_name
, msg
);
765 ui__warning("A vmlinux file was not found.\n%s",
769 if (use_browser
<= 0)
771 vmlinux_warned
= true;
775 if (al
.sym
== NULL
|| !al
.sym
->ignore
) {
776 struct hist_entry
*he
;
778 if ((sort__has_parent
|| symbol_conf
.use_callchain
) &&
780 err
= perf_session__resolve_callchain(session
, al
.thread
,
781 sample
->callchain
, &parent
);
786 he
= perf_session__add_hist_entry(session
, &al
, sample
, evsel
);
788 pr_err("Problem incrementing symbol period, skipping event\n");
792 if (symbol_conf
.use_callchain
) {
793 err
= callchain_append(he
->callchain
, &session
->callchain_cursor
,
799 if (sort_has_symbols
)
800 record_precise_ip(he
, evsel
->idx
, ip
);
806 static void perf_session__mmap_read_idx(struct perf_session
*self
, int idx
)
808 struct perf_sample sample
;
809 struct perf_evsel
*evsel
;
810 union perf_event
*event
;
813 while ((event
= perf_evlist__mmap_read(top
.evlist
, idx
)) != NULL
) {
814 ret
= perf_session__parse_sample(self
, event
, &sample
);
816 pr_err("Can't parse sample, err = %d\n", ret
);
820 evsel
= perf_evlist__id2evsel(self
->evlist
, sample
.id
);
821 assert(evsel
!= NULL
);
823 if (event
->header
.type
== PERF_RECORD_SAMPLE
)
824 perf_event__process_sample(event
, evsel
, &sample
, self
);
825 else if (event
->header
.type
< PERF_RECORD_MAX
) {
826 hists__inc_nr_events(&evsel
->hists
, event
->header
.type
);
827 perf_event__process(event
, &sample
, self
);
829 ++self
->hists
.stats
.nr_unknown_events
;
833 static void perf_session__mmap_read(struct perf_session
*self
)
837 for (i
= 0; i
< top
.evlist
->nr_mmaps
; i
++)
838 perf_session__mmap_read_idx(self
, i
);
841 static void start_counters(struct perf_evlist
*evlist
)
843 struct perf_evsel
*counter
, *first
;
845 first
= list_entry(evlist
->entries
.next
, struct perf_evsel
, node
);
847 list_for_each_entry(counter
, &evlist
->entries
, node
) {
848 struct perf_event_attr
*attr
= &counter
->attr
;
849 struct xyarray
*group_fd
= NULL
;
851 if (group
&& counter
!= first
)
852 group_fd
= first
->fd
;
854 attr
->sample_type
= PERF_SAMPLE_IP
| PERF_SAMPLE_TID
;
857 attr
->sample_type
|= PERF_SAMPLE_PERIOD
;
859 attr
->sample_freq
= top
.freq
;
862 if (evlist
->nr_entries
> 1) {
863 attr
->sample_type
|= PERF_SAMPLE_ID
;
864 attr
->read_format
|= PERF_FORMAT_ID
;
867 if (symbol_conf
.use_callchain
)
868 attr
->sample_type
|= PERF_SAMPLE_CALLCHAIN
;
872 attr
->inherit
= inherit
;
874 attr
->sample_id_all
= sample_id_all_avail
? 1 : 0;
876 if (perf_evsel__open(counter
, top
.evlist
->cpus
,
877 top
.evlist
->threads
, group
,
881 if (err
== EPERM
|| err
== EACCES
) {
882 ui__error_paranoid();
884 } else if (err
== EINVAL
&& sample_id_all_avail
) {
886 * Old kernel, no attr->sample_id_type_all field
888 sample_id_all_avail
= false;
889 goto retry_sample_id
;
892 * If it's cycles then fall back to hrtimer
893 * based cpu-clock-tick sw counter, which
894 * is always available even if no PMU support:
896 if (attr
->type
== PERF_TYPE_HARDWARE
&&
897 attr
->config
== PERF_COUNT_HW_CPU_CYCLES
) {
899 ui__warning("Cycles event not supported,\n"
900 "trying to fall back to cpu-clock-ticks\n");
902 attr
->type
= PERF_TYPE_SOFTWARE
;
903 attr
->config
= PERF_COUNT_SW_CPU_CLOCK
;
908 ui__warning("The %s event is not supported.\n",
909 event_name(counter
));
913 ui__warning("The sys_perf_event_open() syscall "
914 "returned with %d (%s). /bin/dmesg "
915 "may provide additional information.\n"
916 "No CONFIG_PERF_EVENTS=y kernel support "
917 "configured?\n", err
, strerror(err
));
922 if (perf_evlist__mmap(evlist
, mmap_pages
, false) < 0) {
923 ui__warning("Failed to mmap with %d (%s)\n",
924 errno
, strerror(errno
));
935 static int setup_sample_type(void)
937 if (!sort_has_symbols
) {
938 if (symbol_conf
.use_callchain
) {
939 ui__warning("Selected -g but \"sym\" not present in --sort/-s.");
942 } else if (!dont_use_callchains
&& callchain_param
.mode
!= CHAIN_NONE
) {
943 if (callchain_register_param(&callchain_param
) < 0) {
944 ui__warning("Can't register callchain params.\n");
952 static int __cmd_top(void)
957 * FIXME: perf_session__new should allow passing a O_MMAP, so that all this
958 * mmap reading, etc is encapsulated in it. Use O_WRONLY for now.
960 top
.session
= perf_session__new(NULL
, O_WRONLY
, false, false, NULL
);
961 if (top
.session
== NULL
)
964 ret
= setup_sample_type();
968 if (top
.target_tid
!= -1)
969 perf_event__synthesize_thread_map(top
.evlist
->threads
,
970 perf_event__process
, top
.session
);
972 perf_event__synthesize_threads(perf_event__process
, top
.session
);
974 start_counters(top
.evlist
);
975 top
.session
->evlist
= top
.evlist
;
976 perf_session__update_sample_type(top
.session
);
978 /* Wait for a minimal set of events before starting the snapshot */
979 poll(top
.evlist
->pollfd
, top
.evlist
->nr_fds
, 100);
981 perf_session__mmap_read(top
.session
);
983 if (pthread_create(&thread
, NULL
, (use_browser
> 0 ? display_thread_tui
:
984 display_thread
), NULL
)) {
985 printf("Could not create display thread.\n");
990 struct sched_param param
;
992 param
.sched_priority
= realtime_prio
;
993 if (sched_setscheduler(0, SCHED_FIFO
, ¶m
)) {
994 printf("Could not set realtime priority.\n");
1000 u64 hits
= top
.samples
;
1002 perf_session__mmap_read(top
.session
);
1004 if (hits
== top
.samples
)
1005 ret
= poll(top
.evlist
->pollfd
, top
.evlist
->nr_fds
, 100);
1009 perf_session__delete(top
.session
);
1016 parse_callchain_opt(const struct option
*opt __used
, const char *arg
,
1026 dont_use_callchains
= true;
1030 symbol_conf
.use_callchain
= true;
1035 tok
= strtok((char *)arg
, ",");
1039 /* get the output mode */
1040 if (!strncmp(tok
, "graph", strlen(arg
)))
1041 callchain_param
.mode
= CHAIN_GRAPH_ABS
;
1043 else if (!strncmp(tok
, "flat", strlen(arg
)))
1044 callchain_param
.mode
= CHAIN_FLAT
;
1046 else if (!strncmp(tok
, "fractal", strlen(arg
)))
1047 callchain_param
.mode
= CHAIN_GRAPH_REL
;
1049 else if (!strncmp(tok
, "none", strlen(arg
))) {
1050 callchain_param
.mode
= CHAIN_NONE
;
1051 symbol_conf
.use_callchain
= false;
1059 /* get the min percentage */
1060 tok
= strtok(NULL
, ",");
1064 callchain_param
.min_percent
= strtod(tok
, &endptr
);
1068 /* get the print limit */
1069 tok2
= strtok(NULL
, ",");
1073 if (tok2
[0] != 'c') {
1074 callchain_param
.print_limit
= strtod(tok2
, &endptr
);
1075 tok2
= strtok(NULL
, ",");
1080 /* get the call chain order */
1081 if (!strcmp(tok2
, "caller"))
1082 callchain_param
.order
= ORDER_CALLER
;
1083 else if (!strcmp(tok2
, "callee"))
1084 callchain_param
.order
= ORDER_CALLEE
;
1088 if (callchain_register_param(&callchain_param
) < 0) {
1089 fprintf(stderr
, "Can't register callchain params\n");
1095 static const char * const top_usage
[] = {
1096 "perf top [<options>]",
1100 static const struct option options
[] = {
1101 OPT_CALLBACK('e', "event", &top
.evlist
, "event",
1102 "event selector. use 'perf list' to list available events",
1103 parse_events_option
),
1104 OPT_INTEGER('c', "count", &default_interval
,
1105 "event period to sample"),
1106 OPT_INTEGER('p', "pid", &top
.target_pid
,
1107 "profile events on existing process id"),
1108 OPT_INTEGER('t', "tid", &top
.target_tid
,
1109 "profile events on existing thread id"),
1110 OPT_BOOLEAN('a', "all-cpus", &system_wide
,
1111 "system-wide collection from all CPUs"),
1112 OPT_STRING('C', "cpu", &top
.cpu_list
, "cpu",
1113 "list of cpus to monitor"),
1114 OPT_STRING('k', "vmlinux", &symbol_conf
.vmlinux_name
,
1115 "file", "vmlinux pathname"),
1116 OPT_BOOLEAN('K', "hide_kernel_symbols", &top
.hide_kernel_symbols
,
1117 "hide kernel symbols"),
1118 OPT_UINTEGER('m', "mmap-pages", &mmap_pages
, "number of mmap data pages"),
1119 OPT_INTEGER('r', "realtime", &realtime_prio
,
1120 "collect data with this RT SCHED_FIFO priority"),
1121 OPT_INTEGER('d', "delay", &top
.delay_secs
,
1122 "number of seconds to delay between refreshes"),
1123 OPT_BOOLEAN('D', "dump-symtab", &dump_symtab
,
1124 "dump the symbol table used for profiling"),
1125 OPT_INTEGER('f', "count-filter", &top
.count_filter
,
1126 "only display functions with more events than this"),
1127 OPT_BOOLEAN('g', "group", &group
,
1128 "put the counters into a counter group"),
1129 OPT_BOOLEAN('i', "inherit", &inherit
,
1130 "child tasks inherit counters"),
1131 OPT_STRING(0, "sym-annotate", &sym_filter
, "symbol name",
1132 "symbol to annotate"),
1133 OPT_BOOLEAN('z', "zero", &top
.zero
,
1134 "zero history across updates"),
1135 OPT_INTEGER('F', "freq", &top
.freq
,
1136 "profile at this frequency"),
1137 OPT_INTEGER('E', "entries", &top
.print_entries
,
1138 "display this many functions"),
1139 OPT_BOOLEAN('U', "hide_user_symbols", &top
.hide_user_symbols
,
1140 "hide user symbols"),
1141 OPT_BOOLEAN(0, "tui", &use_tui
, "Use the TUI interface"),
1142 OPT_BOOLEAN(0, "stdio", &use_stdio
, "Use the stdio interface"),
1143 OPT_INCR('v', "verbose", &verbose
,
1144 "be more verbose (show counter open errors, etc)"),
1145 OPT_STRING('s', "sort", &sort_order
, "key[,key2...]",
1146 "sort by key(s): pid, comm, dso, symbol, parent"),
1147 OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf
.show_nr_samples
,
1148 "Show a column with the number of samples"),
1149 OPT_CALLBACK_DEFAULT('G', "call-graph", NULL
, "output_type,min_percent, call_order",
1150 "Display callchains using output_type (graph, flat, fractal, or none), min percent threshold and callchain order. "
1151 "Default: fractal,0.5,callee", &parse_callchain_opt
,
1152 callchain_default_opt
),
1153 OPT_BOOLEAN(0, "show-total-period", &symbol_conf
.show_total_period
,
1154 "Show a column with the sum of periods"),
1155 OPT_STRING(0, "dsos", &symbol_conf
.dso_list_str
, "dso[,dso...]",
1156 "only consider symbols in these dsos"),
1157 OPT_STRING(0, "comms", &symbol_conf
.comm_list_str
, "comm[,comm...]",
1158 "only consider symbols in these comms"),
1159 OPT_STRING(0, "symbols", &symbol_conf
.sym_list_str
, "symbol[,symbol...]",
1160 "only consider these symbols"),
1161 OPT_BOOLEAN(0, "source", &symbol_conf
.annotate_src
,
1162 "Interleave source code with assembly code (default)"),
1163 OPT_BOOLEAN(0, "asm-raw", &symbol_conf
.annotate_asm_raw
,
1164 "Display raw encoding of assembly instructions (default)"),
1165 OPT_STRING('M', "disassembler-style", &disassembler_style
, "disassembler style",
1166 "Specify disassembler style (e.g. -M intel for intel syntax)"),
1170 int cmd_top(int argc
, const char **argv
, const char *prefix __used
)
1172 struct perf_evsel
*pos
;
1173 int status
= -ENOMEM
;
1175 top
.evlist
= perf_evlist__new(NULL
, NULL
);
1176 if (top
.evlist
== NULL
)
1179 symbol_conf
.exclude_other
= false;
1181 argc
= parse_options(argc
, argv
, options
, top_usage
, 0);
1183 usage_with_options(top_usage
, options
);
1185 if (sort_order
== default_sort_order
)
1186 sort_order
= "dso,symbol";
1188 setup_sorting(top_usage
, options
);
1195 setup_browser(false);
1197 /* CPU and PID are mutually exclusive */
1198 if (top
.target_tid
> 0 && top
.cpu_list
) {
1199 printf("WARNING: PID switch overriding CPU\n");
1201 top
.cpu_list
= NULL
;
1204 if (top
.target_pid
!= -1)
1205 top
.target_tid
= top
.target_pid
;
1207 if (perf_evlist__create_maps(top
.evlist
, top
.target_pid
,
1208 top
.target_tid
, top
.cpu_list
) < 0)
1209 usage_with_options(top_usage
, options
);
1211 if (!top
.evlist
->nr_entries
&&
1212 perf_evlist__add_default(top
.evlist
) < 0) {
1213 pr_err("Not enough memory for event selector list\n");
1217 if (top
.delay_secs
< 1)
1221 * User specified count overrides default frequency.
1223 if (default_interval
)
1225 else if (top
.freq
) {
1226 default_interval
= top
.freq
;
1228 fprintf(stderr
, "frequency and count are zero, aborting\n");
1232 list_for_each_entry(pos
, &top
.evlist
->entries
, node
) {
1233 if (perf_evsel__alloc_fd(pos
, top
.evlist
->cpus
->nr
,
1234 top
.evlist
->threads
->nr
) < 0)
1237 * Fill in the ones not specifically initialized via -c:
1239 if (pos
->attr
.sample_period
)
1242 pos
->attr
.sample_period
= default_interval
;
1245 if (perf_evlist__alloc_pollfd(top
.evlist
) < 0 ||
1246 perf_evlist__alloc_mmap(top
.evlist
) < 0)
1249 top
.sym_evsel
= list_entry(top
.evlist
->entries
.next
, struct perf_evsel
, node
);
1251 symbol_conf
.priv_size
= sizeof(struct annotation
);
1253 symbol_conf
.try_vmlinux_path
= (symbol_conf
.vmlinux_name
== NULL
);
1254 if (symbol__init() < 0)
1257 sort_entry__setup_elide(&sort_dso
, symbol_conf
.dso_list
, "dso", stdout
);
1258 sort_entry__setup_elide(&sort_comm
, symbol_conf
.comm_list
, "comm", stdout
);
1259 sort_entry__setup_elide(&sort_sym
, symbol_conf
.sym_list
, "symbol", stdout
);
1262 * Avoid annotation data structures overhead when symbols aren't on the
1265 sort_has_symbols
= sort_sym
.list
.next
!= NULL
;
1267 get_term_dimensions(&winsize
);
1268 if (top
.print_entries
== 0) {
1269 update_print_entries(&winsize
);
1270 signal(SIGWINCH
, sig_winch_handler
);
1273 status
= __cmd_top();
1275 perf_evlist__delete(top
.evlist
);