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 ((top
.sym_filter_entry
== NULL
||
204 top
.sym_filter_entry
->ms
.sym
!= he
->ms
.sym
) && use_browser
!= 1))
208 notes
= symbol__annotation(sym
);
210 if (pthread_mutex_trylock(¬es
->lock
))
213 if (notes
->src
== NULL
&&
214 symbol__alloc_hist(sym
, top
.evlist
->nr_entries
) < 0) {
215 pthread_mutex_unlock(¬es
->lock
);
216 pr_err("Not enough memory for annotating '%s' symbol!\n",
222 ip
= he
->ms
.map
->map_ip(he
->ms
.map
, ip
);
223 symbol__inc_addr_samples(sym
, he
->ms
.map
, counter
, ip
);
225 pthread_mutex_unlock(¬es
->lock
);
228 static void show_details(struct hist_entry
*he
)
230 struct annotation
*notes
;
231 struct symbol
*symbol
;
238 notes
= symbol__annotation(symbol
);
240 pthread_mutex_lock(¬es
->lock
);
242 if (notes
->src
== NULL
)
245 printf("Showing %s for %s\n", event_name(top
.sym_evsel
), symbol
->name
);
246 printf(" Events Pcnt (>=%d%%)\n", sym_pcnt_filter
);
248 more
= symbol__annotate_printf(symbol
, he
->ms
.map
, top
.sym_evsel
->idx
,
249 0, sym_pcnt_filter
, top
.print_entries
, 4);
251 symbol__annotate_zero_histogram(symbol
, top
.sym_evsel
->idx
);
253 symbol__annotate_decay_histogram(symbol
, top
.sym_evsel
->idx
);
255 printf("%d lines not displayed, maybe increase display entries [e]\n", more
);
257 pthread_mutex_unlock(¬es
->lock
);
260 static const char CONSOLE_CLEAR
[] = "\e[H\e[2J";
262 static struct hist_entry
*
263 perf_session__add_hist_entry(struct perf_session
*session
,
264 struct addr_location
*al
,
265 struct perf_sample
*sample
,
266 struct perf_evsel
*evsel
)
268 struct hist_entry
*he
;
270 he
= __hists__add_entry(&evsel
->hists
, al
, NULL
, sample
->period
);
274 session
->hists
.stats
.total_period
+= sample
->period
;
275 hists__inc_nr_events(&evsel
->hists
, PERF_RECORD_SAMPLE
);
279 static void print_sym_table(void)
283 const int win_width
= winsize
.ws_col
- 1;
287 perf_top__header_snprintf(&top
, bf
, sizeof(bf
));
290 perf_top__reset_sample_counters(&top
);
292 printf("%-*.*s\n", win_width
, win_width
, graph_dotted_line
);
294 if (top
.sym_evsel
->hists
.stats
.nr_lost_warned
!=
295 top
.sym_evsel
->hists
.stats
.nr_events
[PERF_RECORD_LOST
]) {
296 top
.sym_evsel
->hists
.stats
.nr_lost_warned
=
297 top
.sym_evsel
->hists
.stats
.nr_events
[PERF_RECORD_LOST
];
298 color_fprintf(stdout
, PERF_COLOR_RED
,
299 "WARNING: LOST %d chunks, Check IO/CPU overload",
300 top
.sym_evsel
->hists
.stats
.nr_lost_warned
);
304 if (top
.sym_filter_entry
) {
305 show_details(top
.sym_filter_entry
);
309 hists__collapse_resort_threaded(&top
.sym_evsel
->hists
);
310 hists__output_resort_threaded(&top
.sym_evsel
->hists
);
311 hists__decay_entries_threaded(&top
.sym_evsel
->hists
,
312 top
.hide_user_symbols
,
313 top
.hide_kernel_symbols
);
314 hists__output_recalc_col_len(&top
.sym_evsel
->hists
, winsize
.ws_row
- 3);
316 hists__fprintf(&top
.sym_evsel
->hists
, NULL
, false, false,
317 winsize
.ws_row
- 4 - printed
, win_width
, stdout
);
320 static void prompt_integer(int *target
, const char *msg
)
322 char *buf
= malloc(0), *p
;
326 fprintf(stdout
, "\n%s: ", msg
);
327 if (getline(&buf
, &dummy
, stdin
) < 0)
330 p
= strchr(buf
, '\n');
340 tmp
= strtoul(buf
, NULL
, 10);
346 static void prompt_percent(int *target
, const char *msg
)
350 prompt_integer(&tmp
, msg
);
351 if (tmp
>= 0 && tmp
<= 100)
355 static void prompt_symbol(struct hist_entry
**target
, const char *msg
)
357 char *buf
= malloc(0), *p
;
358 struct hist_entry
*syme
= *target
, *n
, *found
= NULL
;
359 struct rb_node
*next
;
362 /* zero counters of active symbol */
364 __zero_source_counters(syme
);
368 fprintf(stdout
, "\n%s: ", msg
);
369 if (getline(&buf
, &dummy
, stdin
) < 0)
372 p
= strchr(buf
, '\n');
376 next
= rb_first(&top
.sym_evsel
->hists
.entries
);
378 n
= rb_entry(next
, struct hist_entry
, rb_node
);
379 if (n
->ms
.sym
&& !strcmp(buf
, n
->ms
.sym
->name
)) {
383 next
= rb_next(&n
->rb_node
);
387 fprintf(stderr
, "Sorry, %s is not active.\n", buf
);
397 static void print_mapped_keys(void)
401 if (top
.sym_filter_entry
) {
402 struct symbol
*sym
= top
.sym_filter_entry
->ms
.sym
;
406 fprintf(stdout
, "\nMapped keys:\n");
407 fprintf(stdout
, "\t[d] display refresh delay. \t(%d)\n", top
.delay_secs
);
408 fprintf(stdout
, "\t[e] display entries (lines). \t(%d)\n", top
.print_entries
);
410 if (top
.evlist
->nr_entries
> 1)
411 fprintf(stdout
, "\t[E] active event counter. \t(%s)\n", event_name(top
.sym_evsel
));
413 fprintf(stdout
, "\t[f] profile display filter (count). \t(%d)\n", top
.count_filter
);
415 fprintf(stdout
, "\t[F] annotate display filter (percent). \t(%d%%)\n", sym_pcnt_filter
);
416 fprintf(stdout
, "\t[s] annotate symbol. \t(%s)\n", name
?: "NULL");
417 fprintf(stdout
, "\t[S] stop annotation.\n");
420 "\t[K] hide kernel_symbols symbols. \t(%s)\n",
421 top
.hide_kernel_symbols
? "yes" : "no");
423 "\t[U] hide user symbols. \t(%s)\n",
424 top
.hide_user_symbols
? "yes" : "no");
425 fprintf(stdout
, "\t[z] toggle sample zeroing. \t(%d)\n", top
.zero
? 1 : 0);
426 fprintf(stdout
, "\t[qQ] quit.\n");
429 static int key_mapped(int c
)
445 return top
.evlist
->nr_entries
> 1 ? 1 : 0;
453 static void handle_keypress(int c
)
455 if (!key_mapped(c
)) {
456 struct pollfd stdin_poll
= { .fd
= 0, .events
= POLLIN
};
457 struct termios tc
, save
;
460 fprintf(stdout
, "\nEnter selection, or unmapped key to continue: ");
465 tc
.c_lflag
&= ~(ICANON
| ECHO
);
468 tcsetattr(0, TCSANOW
, &tc
);
470 poll(&stdin_poll
, 1, -1);
473 tcsetattr(0, TCSAFLUSH
, &save
);
480 prompt_integer(&top
.delay_secs
, "Enter display delay");
481 if (top
.delay_secs
< 1)
485 prompt_integer(&top
.print_entries
, "Enter display entries (lines)");
486 if (top
.print_entries
== 0) {
487 sig_winch_handler(SIGWINCH
);
488 signal(SIGWINCH
, sig_winch_handler
);
490 signal(SIGWINCH
, SIG_DFL
);
493 if (top
.evlist
->nr_entries
> 1) {
494 /* Select 0 as the default event: */
497 fprintf(stderr
, "\nAvailable events:");
499 list_for_each_entry(top
.sym_evsel
, &top
.evlist
->entries
, node
)
500 fprintf(stderr
, "\n\t%d %s", top
.sym_evsel
->idx
, event_name(top
.sym_evsel
));
502 prompt_integer(&counter
, "Enter details event counter");
504 if (counter
>= top
.evlist
->nr_entries
) {
505 top
.sym_evsel
= list_entry(top
.evlist
->entries
.next
, struct perf_evsel
, node
);
506 fprintf(stderr
, "Sorry, no such event, using %s.\n", event_name(top
.sym_evsel
));
510 list_for_each_entry(top
.sym_evsel
, &top
.evlist
->entries
, node
)
511 if (top
.sym_evsel
->idx
== counter
)
514 top
.sym_evsel
= list_entry(top
.evlist
->entries
.next
, struct perf_evsel
, node
);
517 prompt_integer(&top
.count_filter
, "Enter display event count filter");
520 prompt_percent(&sym_pcnt_filter
, "Enter details display event filter (percent)");
523 top
.hide_kernel_symbols
= !top
.hide_kernel_symbols
;
527 printf("exiting.\n");
529 perf_session__fprintf_dsos(top
.session
, stderr
);
532 prompt_symbol(&top
.sym_filter_entry
, "Enter details symbol");
535 if (!top
.sym_filter_entry
)
538 struct hist_entry
*syme
= top
.sym_filter_entry
;
540 top
.sym_filter_entry
= NULL
;
541 __zero_source_counters(syme
);
545 top
.hide_user_symbols
= !top
.hide_user_symbols
;
548 top
.zero
= !top
.zero
;
555 static void perf_top__sort_new_samples(void *arg
)
557 struct perf_top
*t
= arg
;
558 perf_top__reset_sample_counters(t
);
560 if (t
->evlist
->selected
!= NULL
)
561 t
->sym_evsel
= t
->evlist
->selected
;
563 hists__collapse_resort_threaded(&t
->sym_evsel
->hists
);
564 hists__output_resort_threaded(&t
->sym_evsel
->hists
);
565 hists__decay_entries_threaded(&t
->sym_evsel
->hists
,
566 top
.hide_user_symbols
,
567 top
.hide_kernel_symbols
);
570 static void *display_thread_tui(void *arg __used
)
572 const char *help
= "For a higher level overview, try: perf top --sort comm,dso";
574 perf_top__sort_new_samples(&top
);
575 perf_evlist__tui_browse_hists(top
.evlist
, help
,
576 perf_top__sort_new_samples
,
577 &top
, top
.delay_secs
);
584 static void *display_thread(void *arg __used
)
586 struct pollfd stdin_poll
= { .fd
= 0, .events
= POLLIN
};
587 struct termios tc
, save
;
592 tc
.c_lflag
&= ~(ICANON
| ECHO
);
596 pthread__unblock_sigwinch();
598 delay_msecs
= top
.delay_secs
* 1000;
599 tcsetattr(0, TCSANOW
, &tc
);
606 * Either timeout expired or we got an EINTR due to SIGWINCH,
607 * refresh screen in both cases.
609 switch (poll(&stdin_poll
, 1, delay_msecs
)) {
622 tcsetattr(0, TCSAFLUSH
, &save
);
630 /* Tag samples to be skipped. */
631 static const char *skip_symbols
[] = {
638 "mwait_idle_with_hints",
640 "ppc64_runlatch_off",
641 "pseries_dedicated_idle_sleep",
645 static int symbol_filter(struct map
*map __used
, struct symbol
*sym
)
647 const char *name
= sym
->name
;
651 * ppc64 uses function descriptors and appends a '.' to the
652 * start of every instruction address. Remove it.
657 if (!strcmp(name
, "_text") ||
658 !strcmp(name
, "_etext") ||
659 !strcmp(name
, "_sinittext") ||
660 !strncmp("init_module", name
, 11) ||
661 !strncmp("cleanup_module", name
, 14) ||
662 strstr(name
, "_text_start") ||
663 strstr(name
, "_text_end"))
666 for (i
= 0; skip_symbols
[i
]; i
++) {
667 if (!strcmp(skip_symbols
[i
], name
)) {
676 static void perf_event__process_sample(const union perf_event
*event
,
677 struct perf_evsel
*evsel
,
678 struct perf_sample
*sample
,
679 struct perf_session
*session
)
681 struct symbol
*parent
= NULL
;
682 u64 ip
= event
->ip
.ip
;
683 struct addr_location al
;
684 struct machine
*machine
;
686 u8 origin
= event
->header
.misc
& PERF_RECORD_MISC_CPUMODE_MASK
;
691 case PERF_RECORD_MISC_USER
:
693 if (top
.hide_user_symbols
)
695 machine
= perf_session__find_host_machine(session
);
697 case PERF_RECORD_MISC_KERNEL
:
698 ++top
.kernel_samples
;
699 if (top
.hide_kernel_symbols
)
701 machine
= perf_session__find_host_machine(session
);
703 case PERF_RECORD_MISC_GUEST_KERNEL
:
704 ++top
.guest_kernel_samples
;
705 machine
= perf_session__find_machine(session
, event
->ip
.pid
);
707 case PERF_RECORD_MISC_GUEST_USER
:
708 ++top
.guest_us_samples
;
710 * TODO: we don't process guest user from host side
711 * except simple counting.
718 if (!machine
&& perf_guest
) {
719 pr_err("Can't find guest [%d]'s kernel information\n",
724 if (event
->header
.misc
& PERF_RECORD_MISC_EXACT_IP
)
727 if (perf_event__preprocess_sample(event
, session
, &al
, sample
,
728 symbol_filter
) < 0 ||
732 if (!kptr_restrict_warned
&&
733 symbol_conf
.kptr_restrict
&&
734 al
.cpumode
== PERF_RECORD_MISC_KERNEL
) {
736 "Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
737 "Check /proc/sys/kernel/kptr_restrict.\n\n"
738 "Kernel%s samples will not be resolved.\n",
739 !RB_EMPTY_ROOT(&al
.map
->dso
->symbols
[MAP__FUNCTION
]) ?
741 if (use_browser
<= 0)
743 kptr_restrict_warned
= true;
746 if (al
.sym
== NULL
) {
747 const char *msg
= "Kernel samples will not be resolved.\n";
749 * As we do lazy loading of symtabs we only will know if the
750 * specified vmlinux file is invalid when we actually have a
751 * hit in kernel space and then try to load it. So if we get
752 * here and there are _no_ symbols in the DSO backing the
753 * kernel map, bail out.
755 * We may never get here, for instance, if we use -K/
756 * --hide-kernel-symbols, even if the user specifies an
757 * invalid --vmlinux ;-)
759 if (!kptr_restrict_warned
&& !vmlinux_warned
&&
760 al
.map
== machine
->vmlinux_maps
[MAP__FUNCTION
] &&
761 RB_EMPTY_ROOT(&al
.map
->dso
->symbols
[MAP__FUNCTION
])) {
762 if (symbol_conf
.vmlinux_name
) {
763 ui__warning("The %s file can't be used.\n%s",
764 symbol_conf
.vmlinux_name
, msg
);
766 ui__warning("A vmlinux file was not found.\n%s",
770 if (use_browser
<= 0)
772 vmlinux_warned
= true;
776 if (al
.sym
== NULL
|| !al
.sym
->ignore
) {
777 struct hist_entry
*he
;
779 if ((sort__has_parent
|| symbol_conf
.use_callchain
) &&
781 err
= perf_session__resolve_callchain(session
, al
.thread
,
782 sample
->callchain
, &parent
);
787 he
= perf_session__add_hist_entry(session
, &al
, sample
, evsel
);
789 pr_err("Problem incrementing symbol period, skipping event\n");
793 if (symbol_conf
.use_callchain
) {
794 err
= callchain_append(he
->callchain
, &session
->callchain_cursor
,
800 if (sort_has_symbols
)
801 record_precise_ip(he
, evsel
->idx
, ip
);
807 static void perf_session__mmap_read_idx(struct perf_session
*self
, int idx
)
809 struct perf_sample sample
;
810 struct perf_evsel
*evsel
;
811 union perf_event
*event
;
814 while ((event
= perf_evlist__mmap_read(top
.evlist
, idx
)) != NULL
) {
815 ret
= perf_session__parse_sample(self
, event
, &sample
);
817 pr_err("Can't parse sample, err = %d\n", ret
);
821 evsel
= perf_evlist__id2evsel(self
->evlist
, sample
.id
);
822 assert(evsel
!= NULL
);
824 if (event
->header
.type
== PERF_RECORD_SAMPLE
)
825 perf_event__process_sample(event
, evsel
, &sample
, self
);
826 else if (event
->header
.type
< PERF_RECORD_MAX
) {
827 hists__inc_nr_events(&evsel
->hists
, event
->header
.type
);
828 perf_event__process(event
, &sample
, self
);
830 ++self
->hists
.stats
.nr_unknown_events
;
834 static void perf_session__mmap_read(struct perf_session
*self
)
838 for (i
= 0; i
< top
.evlist
->nr_mmaps
; i
++)
839 perf_session__mmap_read_idx(self
, i
);
842 static void start_counters(struct perf_evlist
*evlist
)
844 struct perf_evsel
*counter
, *first
;
846 first
= list_entry(evlist
->entries
.next
, struct perf_evsel
, node
);
848 list_for_each_entry(counter
, &evlist
->entries
, node
) {
849 struct perf_event_attr
*attr
= &counter
->attr
;
850 struct xyarray
*group_fd
= NULL
;
852 if (group
&& counter
!= first
)
853 group_fd
= first
->fd
;
855 attr
->sample_type
= PERF_SAMPLE_IP
| PERF_SAMPLE_TID
;
858 attr
->sample_type
|= PERF_SAMPLE_PERIOD
;
860 attr
->sample_freq
= top
.freq
;
863 if (evlist
->nr_entries
> 1) {
864 attr
->sample_type
|= PERF_SAMPLE_ID
;
865 attr
->read_format
|= PERF_FORMAT_ID
;
868 if (symbol_conf
.use_callchain
)
869 attr
->sample_type
|= PERF_SAMPLE_CALLCHAIN
;
873 attr
->inherit
= inherit
;
875 attr
->sample_id_all
= sample_id_all_avail
? 1 : 0;
877 if (perf_evsel__open(counter
, top
.evlist
->cpus
,
878 top
.evlist
->threads
, group
,
882 if (err
== EPERM
|| err
== EACCES
) {
883 ui__error_paranoid();
885 } else if (err
== EINVAL
&& sample_id_all_avail
) {
887 * Old kernel, no attr->sample_id_type_all field
889 sample_id_all_avail
= false;
890 goto retry_sample_id
;
893 * If it's cycles then fall back to hrtimer
894 * based cpu-clock-tick sw counter, which
895 * is always available even if no PMU support:
897 if (attr
->type
== PERF_TYPE_HARDWARE
&&
898 attr
->config
== PERF_COUNT_HW_CPU_CYCLES
) {
900 ui__warning("Cycles event not supported,\n"
901 "trying to fall back to cpu-clock-ticks\n");
903 attr
->type
= PERF_TYPE_SOFTWARE
;
904 attr
->config
= PERF_COUNT_SW_CPU_CLOCK
;
909 ui__warning("The %s event is not supported.\n",
910 event_name(counter
));
914 ui__warning("The sys_perf_event_open() syscall "
915 "returned with %d (%s). /bin/dmesg "
916 "may provide additional information.\n"
917 "No CONFIG_PERF_EVENTS=y kernel support "
918 "configured?\n", err
, strerror(err
));
923 if (perf_evlist__mmap(evlist
, mmap_pages
, false) < 0) {
924 ui__warning("Failed to mmap with %d (%s)\n",
925 errno
, strerror(errno
));
936 static int setup_sample_type(void)
938 if (!sort_has_symbols
) {
939 if (symbol_conf
.use_callchain
) {
940 ui__warning("Selected -g but \"sym\" not present in --sort/-s.");
943 } else if (!dont_use_callchains
&& callchain_param
.mode
!= CHAIN_NONE
) {
944 if (callchain_register_param(&callchain_param
) < 0) {
945 ui__warning("Can't register callchain params.\n");
953 static int __cmd_top(void)
958 * FIXME: perf_session__new should allow passing a O_MMAP, so that all this
959 * mmap reading, etc is encapsulated in it. Use O_WRONLY for now.
961 top
.session
= perf_session__new(NULL
, O_WRONLY
, false, false, NULL
);
962 if (top
.session
== NULL
)
965 ret
= setup_sample_type();
969 if (top
.target_tid
!= -1)
970 perf_event__synthesize_thread_map(top
.evlist
->threads
,
971 perf_event__process
, top
.session
);
973 perf_event__synthesize_threads(perf_event__process
, top
.session
);
975 start_counters(top
.evlist
);
976 top
.session
->evlist
= top
.evlist
;
977 perf_session__update_sample_type(top
.session
);
979 /* Wait for a minimal set of events before starting the snapshot */
980 poll(top
.evlist
->pollfd
, top
.evlist
->nr_fds
, 100);
982 perf_session__mmap_read(top
.session
);
984 if (pthread_create(&thread
, NULL
, (use_browser
> 0 ? display_thread_tui
:
985 display_thread
), NULL
)) {
986 printf("Could not create display thread.\n");
991 struct sched_param param
;
993 param
.sched_priority
= realtime_prio
;
994 if (sched_setscheduler(0, SCHED_FIFO
, ¶m
)) {
995 printf("Could not set realtime priority.\n");
1001 u64 hits
= top
.samples
;
1003 perf_session__mmap_read(top
.session
);
1005 if (hits
== top
.samples
)
1006 ret
= poll(top
.evlist
->pollfd
, top
.evlist
->nr_fds
, 100);
1010 perf_session__delete(top
.session
);
1017 parse_callchain_opt(const struct option
*opt __used
, const char *arg
,
1027 dont_use_callchains
= true;
1031 symbol_conf
.use_callchain
= true;
1036 tok
= strtok((char *)arg
, ",");
1040 /* get the output mode */
1041 if (!strncmp(tok
, "graph", strlen(arg
)))
1042 callchain_param
.mode
= CHAIN_GRAPH_ABS
;
1044 else if (!strncmp(tok
, "flat", strlen(arg
)))
1045 callchain_param
.mode
= CHAIN_FLAT
;
1047 else if (!strncmp(tok
, "fractal", strlen(arg
)))
1048 callchain_param
.mode
= CHAIN_GRAPH_REL
;
1050 else if (!strncmp(tok
, "none", strlen(arg
))) {
1051 callchain_param
.mode
= CHAIN_NONE
;
1052 symbol_conf
.use_callchain
= false;
1060 /* get the min percentage */
1061 tok
= strtok(NULL
, ",");
1065 callchain_param
.min_percent
= strtod(tok
, &endptr
);
1069 /* get the print limit */
1070 tok2
= strtok(NULL
, ",");
1074 if (tok2
[0] != 'c') {
1075 callchain_param
.print_limit
= strtod(tok2
, &endptr
);
1076 tok2
= strtok(NULL
, ",");
1081 /* get the call chain order */
1082 if (!strcmp(tok2
, "caller"))
1083 callchain_param
.order
= ORDER_CALLER
;
1084 else if (!strcmp(tok2
, "callee"))
1085 callchain_param
.order
= ORDER_CALLEE
;
1089 if (callchain_register_param(&callchain_param
) < 0) {
1090 fprintf(stderr
, "Can't register callchain params\n");
1096 static const char * const top_usage
[] = {
1097 "perf top [<options>]",
1101 static const struct option options
[] = {
1102 OPT_CALLBACK('e', "event", &top
.evlist
, "event",
1103 "event selector. use 'perf list' to list available events",
1104 parse_events_option
),
1105 OPT_INTEGER('c', "count", &default_interval
,
1106 "event period to sample"),
1107 OPT_INTEGER('p', "pid", &top
.target_pid
,
1108 "profile events on existing process id"),
1109 OPT_INTEGER('t', "tid", &top
.target_tid
,
1110 "profile events on existing thread id"),
1111 OPT_BOOLEAN('a', "all-cpus", &system_wide
,
1112 "system-wide collection from all CPUs"),
1113 OPT_STRING('C', "cpu", &top
.cpu_list
, "cpu",
1114 "list of cpus to monitor"),
1115 OPT_STRING('k', "vmlinux", &symbol_conf
.vmlinux_name
,
1116 "file", "vmlinux pathname"),
1117 OPT_BOOLEAN('K', "hide_kernel_symbols", &top
.hide_kernel_symbols
,
1118 "hide kernel symbols"),
1119 OPT_UINTEGER('m', "mmap-pages", &mmap_pages
, "number of mmap data pages"),
1120 OPT_INTEGER('r', "realtime", &realtime_prio
,
1121 "collect data with this RT SCHED_FIFO priority"),
1122 OPT_INTEGER('d', "delay", &top
.delay_secs
,
1123 "number of seconds to delay between refreshes"),
1124 OPT_BOOLEAN('D', "dump-symtab", &dump_symtab
,
1125 "dump the symbol table used for profiling"),
1126 OPT_INTEGER('f', "count-filter", &top
.count_filter
,
1127 "only display functions with more events than this"),
1128 OPT_BOOLEAN('g', "group", &group
,
1129 "put the counters into a counter group"),
1130 OPT_BOOLEAN('i', "inherit", &inherit
,
1131 "child tasks inherit counters"),
1132 OPT_STRING(0, "sym-annotate", &sym_filter
, "symbol name",
1133 "symbol to annotate"),
1134 OPT_BOOLEAN('z', "zero", &top
.zero
,
1135 "zero history across updates"),
1136 OPT_INTEGER('F', "freq", &top
.freq
,
1137 "profile at this frequency"),
1138 OPT_INTEGER('E', "entries", &top
.print_entries
,
1139 "display this many functions"),
1140 OPT_BOOLEAN('U', "hide_user_symbols", &top
.hide_user_symbols
,
1141 "hide user symbols"),
1142 OPT_BOOLEAN(0, "tui", &use_tui
, "Use the TUI interface"),
1143 OPT_BOOLEAN(0, "stdio", &use_stdio
, "Use the stdio interface"),
1144 OPT_INCR('v', "verbose", &verbose
,
1145 "be more verbose (show counter open errors, etc)"),
1146 OPT_STRING('s', "sort", &sort_order
, "key[,key2...]",
1147 "sort by key(s): pid, comm, dso, symbol, parent"),
1148 OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf
.show_nr_samples
,
1149 "Show a column with the number of samples"),
1150 OPT_CALLBACK_DEFAULT('G', "call-graph", NULL
, "output_type,min_percent, call_order",
1151 "Display callchains using output_type (graph, flat, fractal, or none), min percent threshold and callchain order. "
1152 "Default: fractal,0.5,callee", &parse_callchain_opt
,
1153 callchain_default_opt
),
1154 OPT_BOOLEAN(0, "show-total-period", &symbol_conf
.show_total_period
,
1155 "Show a column with the sum of periods"),
1156 OPT_STRING(0, "dsos", &symbol_conf
.dso_list_str
, "dso[,dso...]",
1157 "only consider symbols in these dsos"),
1158 OPT_STRING(0, "comms", &symbol_conf
.comm_list_str
, "comm[,comm...]",
1159 "only consider symbols in these comms"),
1160 OPT_STRING(0, "symbols", &symbol_conf
.sym_list_str
, "symbol[,symbol...]",
1161 "only consider these symbols"),
1162 OPT_BOOLEAN(0, "source", &symbol_conf
.annotate_src
,
1163 "Interleave source code with assembly code (default)"),
1164 OPT_BOOLEAN(0, "asm-raw", &symbol_conf
.annotate_asm_raw
,
1165 "Display raw encoding of assembly instructions (default)"),
1166 OPT_STRING('M', "disassembler-style", &disassembler_style
, "disassembler style",
1167 "Specify disassembler style (e.g. -M intel for intel syntax)"),
1171 int cmd_top(int argc
, const char **argv
, const char *prefix __used
)
1173 struct perf_evsel
*pos
;
1174 int status
= -ENOMEM
;
1176 top
.evlist
= perf_evlist__new(NULL
, NULL
);
1177 if (top
.evlist
== NULL
)
1180 symbol_conf
.exclude_other
= false;
1182 argc
= parse_options(argc
, argv
, options
, top_usage
, 0);
1184 usage_with_options(top_usage
, options
);
1186 if (sort_order
== default_sort_order
)
1187 sort_order
= "dso,symbol";
1189 setup_sorting(top_usage
, options
);
1196 setup_browser(false);
1198 /* CPU and PID are mutually exclusive */
1199 if (top
.target_tid
> 0 && top
.cpu_list
) {
1200 printf("WARNING: PID switch overriding CPU\n");
1202 top
.cpu_list
= NULL
;
1205 if (top
.target_pid
!= -1)
1206 top
.target_tid
= top
.target_pid
;
1208 if (perf_evlist__create_maps(top
.evlist
, top
.target_pid
,
1209 top
.target_tid
, top
.cpu_list
) < 0)
1210 usage_with_options(top_usage
, options
);
1212 if (!top
.evlist
->nr_entries
&&
1213 perf_evlist__add_default(top
.evlist
) < 0) {
1214 pr_err("Not enough memory for event selector list\n");
1218 if (top
.delay_secs
< 1)
1222 * User specified count overrides default frequency.
1224 if (default_interval
)
1226 else if (top
.freq
) {
1227 default_interval
= top
.freq
;
1229 fprintf(stderr
, "frequency and count are zero, aborting\n");
1233 list_for_each_entry(pos
, &top
.evlist
->entries
, node
) {
1234 if (perf_evsel__alloc_fd(pos
, top
.evlist
->cpus
->nr
,
1235 top
.evlist
->threads
->nr
) < 0)
1238 * Fill in the ones not specifically initialized via -c:
1240 if (pos
->attr
.sample_period
)
1243 pos
->attr
.sample_period
= default_interval
;
1246 if (perf_evlist__alloc_pollfd(top
.evlist
) < 0 ||
1247 perf_evlist__alloc_mmap(top
.evlist
) < 0)
1250 top
.sym_evsel
= list_entry(top
.evlist
->entries
.next
, struct perf_evsel
, node
);
1252 symbol_conf
.priv_size
= sizeof(struct annotation
);
1254 symbol_conf
.try_vmlinux_path
= (symbol_conf
.vmlinux_name
== NULL
);
1255 if (symbol__init() < 0)
1258 sort_entry__setup_elide(&sort_dso
, symbol_conf
.dso_list
, "dso", stdout
);
1259 sort_entry__setup_elide(&sort_comm
, symbol_conf
.comm_list
, "comm", stdout
);
1260 sort_entry__setup_elide(&sort_sym
, symbol_conf
.sym_list
, "symbol", stdout
);
1263 * Avoid annotation data structures overhead when symbols aren't on the
1266 sort_has_symbols
= sort_sym
.list
.next
!= NULL
;
1268 get_term_dimensions(&winsize
);
1269 if (top
.print_entries
== 0) {
1270 update_print_entries(&winsize
);
1271 signal(SIGWINCH
, sig_winch_handler
);
1274 status
= __cmd_top();
1276 perf_evlist__delete(top
.evlist
);