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 unsigned int mmap_pages
= 128;
94 static bool dump_symtab
= false;
96 static struct winsize winsize
;
98 static const char *sym_filter
= NULL
;
99 static int sym_pcnt_filter
= 5;
105 void get_term_dimensions(struct winsize
*ws
)
107 char *s
= getenv("LINES");
110 ws
->ws_row
= atoi(s
);
111 s
= getenv("COLUMNS");
113 ws
->ws_col
= atoi(s
);
114 if (ws
->ws_row
&& ws
->ws_col
)
119 if (ioctl(1, TIOCGWINSZ
, ws
) == 0 &&
120 ws
->ws_row
&& ws
->ws_col
)
127 static void update_print_entries(struct winsize
*ws
)
129 top
.print_entries
= ws
->ws_row
;
131 if (top
.print_entries
> 9)
132 top
.print_entries
-= 9;
135 static void sig_winch_handler(int sig __used
)
137 get_term_dimensions(&winsize
);
138 update_print_entries(&winsize
);
141 static int parse_source(struct hist_entry
*he
)
144 struct annotation
*notes
;
148 if (!he
|| !he
->ms
.sym
)
155 * We can't annotate with just /proc/kallsyms
157 if (map
->dso
->symtab_type
== SYMTAB__KALLSYMS
) {
158 pr_err("Can't annotate %s: No vmlinux file was found in the "
159 "path\n", sym
->name
);
164 notes
= symbol__annotation(sym
);
165 if (notes
->src
!= NULL
) {
166 pthread_mutex_lock(¬es
->lock
);
170 pthread_mutex_lock(¬es
->lock
);
172 if (symbol__alloc_hist(sym
, top
.evlist
->nr_entries
) < 0) {
173 pthread_mutex_unlock(¬es
->lock
);
174 pr_err("Not enough memory for annotating '%s' symbol!\n",
180 err
= symbol__annotate(sym
, map
, 0);
183 top
.sym_filter_entry
= he
;
186 pthread_mutex_unlock(¬es
->lock
);
190 static void __zero_source_counters(struct hist_entry
*he
)
192 struct symbol
*sym
= he
->ms
.sym
;
193 symbol__annotate_zero_histograms(sym
);
196 static void record_precise_ip(struct hist_entry
*he
, int counter
, u64 ip
)
198 struct annotation
*notes
;
201 if (he
== NULL
|| he
->ms
.sym
== NULL
||
202 (he
!= top
.sym_filter_entry
&& use_browser
!= 1))
206 notes
= symbol__annotation(sym
);
208 if (pthread_mutex_trylock(¬es
->lock
))
211 if (notes
->src
== NULL
&&
212 symbol__alloc_hist(sym
, top
.evlist
->nr_entries
) < 0) {
213 pthread_mutex_unlock(¬es
->lock
);
214 pr_err("Not enough memory for annotating '%s' symbol!\n",
220 ip
= he
->ms
.map
->map_ip(he
->ms
.map
, ip
);
221 symbol__inc_addr_samples(sym
, he
->ms
.map
, counter
, ip
);
223 pthread_mutex_unlock(¬es
->lock
);
226 static void show_details(struct hist_entry
*he
)
228 struct annotation
*notes
;
229 struct symbol
*symbol
;
236 notes
= symbol__annotation(symbol
);
238 pthread_mutex_lock(¬es
->lock
);
240 if (notes
->src
== NULL
)
243 printf("Showing %s for %s\n", event_name(top
.sym_evsel
), symbol
->name
);
244 printf(" Events Pcnt (>=%d%%)\n", sym_pcnt_filter
);
246 more
= symbol__annotate_printf(symbol
, he
->ms
.map
, top
.sym_evsel
->idx
,
247 0, sym_pcnt_filter
, top
.print_entries
, 4);
249 symbol__annotate_zero_histogram(symbol
, top
.sym_evsel
->idx
);
251 symbol__annotate_decay_histogram(symbol
, top
.sym_evsel
->idx
);
253 printf("%d lines not displayed, maybe increase display entries [e]\n", more
);
255 pthread_mutex_unlock(¬es
->lock
);
258 static const char CONSOLE_CLEAR
[] = "\e[H\e[2J";
260 static struct hist_entry
*
261 perf_session__add_hist_entry(struct perf_session
*session
,
262 struct addr_location
*al
,
263 struct perf_sample
*sample
,
264 struct perf_evsel
*evsel
)
266 struct hist_entry
*he
;
268 he
= __hists__add_entry(&evsel
->hists
, al
, NULL
, sample
->period
);
272 session
->hists
.stats
.total_period
+= sample
->period
;
273 hists__inc_nr_events(&evsel
->hists
, PERF_RECORD_SAMPLE
);
277 static void print_sym_table(void)
281 const int win_width
= winsize
.ws_col
- 1;
285 perf_top__header_snprintf(&top
, bf
, sizeof(bf
));
288 perf_top__reset_sample_counters(&top
);
290 printf("%-*.*s\n", win_width
, win_width
, graph_dotted_line
);
292 if (top
.total_lost_warned
!= top
.session
->hists
.stats
.total_lost
) {
293 top
.total_lost_warned
= top
.session
->hists
.stats
.total_lost
;
294 color_fprintf(stdout
, PERF_COLOR_RED
, "WARNING:");
295 printf(" LOST %" PRIu64
" events, Check IO/CPU overload\n",
296 top
.total_lost_warned
);
300 if (top
.sym_filter_entry
) {
301 show_details(top
.sym_filter_entry
);
305 hists__collapse_resort_threaded(&top
.sym_evsel
->hists
);
306 hists__output_resort_threaded(&top
.sym_evsel
->hists
);
307 hists__decay_entries_threaded(&top
.sym_evsel
->hists
,
308 top
.hide_user_symbols
,
309 top
.hide_kernel_symbols
);
310 hists__output_recalc_col_len(&top
.sym_evsel
->hists
, winsize
.ws_row
- 3);
312 hists__fprintf(&top
.sym_evsel
->hists
, NULL
, false, false,
313 winsize
.ws_row
- 4 - printed
, win_width
, stdout
);
316 static void prompt_integer(int *target
, const char *msg
)
318 char *buf
= malloc(0), *p
;
322 fprintf(stdout
, "\n%s: ", msg
);
323 if (getline(&buf
, &dummy
, stdin
) < 0)
326 p
= strchr(buf
, '\n');
336 tmp
= strtoul(buf
, NULL
, 10);
342 static void prompt_percent(int *target
, const char *msg
)
346 prompt_integer(&tmp
, msg
);
347 if (tmp
>= 0 && tmp
<= 100)
351 static void prompt_symbol(struct hist_entry
**target
, const char *msg
)
353 char *buf
= malloc(0), *p
;
354 struct hist_entry
*syme
= *target
, *n
, *found
= NULL
;
355 struct rb_node
*next
;
358 /* zero counters of active symbol */
360 __zero_source_counters(syme
);
364 fprintf(stdout
, "\n%s: ", msg
);
365 if (getline(&buf
, &dummy
, stdin
) < 0)
368 p
= strchr(buf
, '\n');
372 next
= rb_first(&top
.sym_evsel
->hists
.entries
);
374 n
= rb_entry(next
, struct hist_entry
, rb_node
);
375 if (n
->ms
.sym
&& !strcmp(buf
, n
->ms
.sym
->name
)) {
379 next
= rb_next(&n
->rb_node
);
383 fprintf(stderr
, "Sorry, %s is not active.\n", buf
);
393 static void print_mapped_keys(void)
397 if (top
.sym_filter_entry
) {
398 struct symbol
*sym
= top
.sym_filter_entry
->ms
.sym
;
402 fprintf(stdout
, "\nMapped keys:\n");
403 fprintf(stdout
, "\t[d] display refresh delay. \t(%d)\n", top
.delay_secs
);
404 fprintf(stdout
, "\t[e] display entries (lines). \t(%d)\n", top
.print_entries
);
406 if (top
.evlist
->nr_entries
> 1)
407 fprintf(stdout
, "\t[E] active event counter. \t(%s)\n", event_name(top
.sym_evsel
));
409 fprintf(stdout
, "\t[f] profile display filter (count). \t(%d)\n", top
.count_filter
);
411 fprintf(stdout
, "\t[F] annotate display filter (percent). \t(%d%%)\n", sym_pcnt_filter
);
412 fprintf(stdout
, "\t[s] annotate symbol. \t(%s)\n", name
?: "NULL");
413 fprintf(stdout
, "\t[S] stop annotation.\n");
416 "\t[K] hide kernel_symbols symbols. \t(%s)\n",
417 top
.hide_kernel_symbols
? "yes" : "no");
419 "\t[U] hide user symbols. \t(%s)\n",
420 top
.hide_user_symbols
? "yes" : "no");
421 fprintf(stdout
, "\t[z] toggle sample zeroing. \t(%d)\n", top
.zero
? 1 : 0);
422 fprintf(stdout
, "\t[qQ] quit.\n");
425 static int key_mapped(int c
)
441 return top
.evlist
->nr_entries
> 1 ? 1 : 0;
449 static void handle_keypress(int c
)
451 if (!key_mapped(c
)) {
452 struct pollfd stdin_poll
= { .fd
= 0, .events
= POLLIN
};
453 struct termios tc
, save
;
456 fprintf(stdout
, "\nEnter selection, or unmapped key to continue: ");
461 tc
.c_lflag
&= ~(ICANON
| ECHO
);
464 tcsetattr(0, TCSANOW
, &tc
);
466 poll(&stdin_poll
, 1, -1);
469 tcsetattr(0, TCSAFLUSH
, &save
);
476 prompt_integer(&top
.delay_secs
, "Enter display delay");
477 if (top
.delay_secs
< 1)
481 prompt_integer(&top
.print_entries
, "Enter display entries (lines)");
482 if (top
.print_entries
== 0) {
483 sig_winch_handler(SIGWINCH
);
484 signal(SIGWINCH
, sig_winch_handler
);
486 signal(SIGWINCH
, SIG_DFL
);
489 if (top
.evlist
->nr_entries
> 1) {
490 /* Select 0 as the default event: */
493 fprintf(stderr
, "\nAvailable events:");
495 list_for_each_entry(top
.sym_evsel
, &top
.evlist
->entries
, node
)
496 fprintf(stderr
, "\n\t%d %s", top
.sym_evsel
->idx
, event_name(top
.sym_evsel
));
498 prompt_integer(&counter
, "Enter details event counter");
500 if (counter
>= top
.evlist
->nr_entries
) {
501 top
.sym_evsel
= list_entry(top
.evlist
->entries
.next
, struct perf_evsel
, node
);
502 fprintf(stderr
, "Sorry, no such event, using %s.\n", event_name(top
.sym_evsel
));
506 list_for_each_entry(top
.sym_evsel
, &top
.evlist
->entries
, node
)
507 if (top
.sym_evsel
->idx
== counter
)
510 top
.sym_evsel
= list_entry(top
.evlist
->entries
.next
, struct perf_evsel
, node
);
513 prompt_integer(&top
.count_filter
, "Enter display event count filter");
516 prompt_percent(&sym_pcnt_filter
, "Enter details display event filter (percent)");
519 top
.hide_kernel_symbols
= !top
.hide_kernel_symbols
;
523 printf("exiting.\n");
525 perf_session__fprintf_dsos(top
.session
, stderr
);
528 prompt_symbol(&top
.sym_filter_entry
, "Enter details symbol");
531 if (!top
.sym_filter_entry
)
534 struct hist_entry
*syme
= top
.sym_filter_entry
;
536 top
.sym_filter_entry
= NULL
;
537 __zero_source_counters(syme
);
541 top
.hide_user_symbols
= !top
.hide_user_symbols
;
544 top
.zero
= !top
.zero
;
551 static void perf_top__sort_new_samples(void *arg
)
553 struct perf_top
*t
= arg
;
554 perf_top__reset_sample_counters(t
);
556 if (t
->evlist
->selected
!= NULL
)
557 t
->sym_evsel
= t
->evlist
->selected
;
559 hists__collapse_resort_threaded(&t
->sym_evsel
->hists
);
560 hists__output_resort_threaded(&t
->sym_evsel
->hists
);
561 hists__decay_entries_threaded(&t
->sym_evsel
->hists
,
562 top
.hide_user_symbols
,
563 top
.hide_kernel_symbols
);
564 hists__output_recalc_col_len(&t
->sym_evsel
->hists
, winsize
.ws_row
- 3);
567 static void *display_thread_tui(void *arg __used
)
569 const char *help
= "For a higher level overview, try: perf top --sort comm,dso";
571 perf_top__sort_new_samples(&top
);
572 perf_evlist__tui_browse_hists(top
.evlist
, help
,
573 perf_top__sort_new_samples
,
574 &top
, top
.delay_secs
);
581 static void *display_thread(void *arg __used
)
583 struct pollfd stdin_poll
= { .fd
= 0, .events
= POLLIN
};
584 struct termios tc
, save
;
589 tc
.c_lflag
&= ~(ICANON
| ECHO
);
593 pthread__unblock_sigwinch();
595 delay_msecs
= top
.delay_secs
* 1000;
596 tcsetattr(0, TCSANOW
, &tc
);
603 * Either timeout expired or we got an EINTR due to SIGWINCH,
604 * refresh screen in both cases.
606 switch (poll(&stdin_poll
, 1, delay_msecs
)) {
619 tcsetattr(0, TCSAFLUSH
, &save
);
627 /* Tag samples to be skipped. */
628 static const char *skip_symbols
[] = {
635 "mwait_idle_with_hints",
637 "ppc64_runlatch_off",
638 "pseries_dedicated_idle_sleep",
642 static int symbol_filter(struct map
*map __used
, struct symbol
*sym
)
644 const char *name
= sym
->name
;
648 * ppc64 uses function descriptors and appends a '.' to the
649 * start of every instruction address. Remove it.
654 if (!strcmp(name
, "_text") ||
655 !strcmp(name
, "_etext") ||
656 !strcmp(name
, "_sinittext") ||
657 !strncmp("init_module", name
, 11) ||
658 !strncmp("cleanup_module", name
, 14) ||
659 strstr(name
, "_text_start") ||
660 strstr(name
, "_text_end"))
663 for (i
= 0; skip_symbols
[i
]; i
++) {
664 if (!strcmp(skip_symbols
[i
], name
)) {
673 static void perf_event__process_sample(const union perf_event
*event
,
674 struct perf_sample
*sample
,
675 struct perf_session
*session
)
677 struct symbol
*parent
= NULL
;
678 u64 ip
= event
->ip
.ip
;
679 struct addr_location al
;
680 struct machine
*machine
;
682 u8 origin
= event
->header
.misc
& PERF_RECORD_MISC_CPUMODE_MASK
;
687 case PERF_RECORD_MISC_USER
:
689 if (top
.hide_user_symbols
)
691 machine
= perf_session__find_host_machine(session
);
693 case PERF_RECORD_MISC_KERNEL
:
694 ++top
.kernel_samples
;
695 if (top
.hide_kernel_symbols
)
697 machine
= perf_session__find_host_machine(session
);
699 case PERF_RECORD_MISC_GUEST_KERNEL
:
700 ++top
.guest_kernel_samples
;
701 machine
= perf_session__find_machine(session
, event
->ip
.pid
);
703 case PERF_RECORD_MISC_GUEST_USER
:
704 ++top
.guest_us_samples
;
706 * TODO: we don't process guest user from host side
707 * except simple counting.
714 if (!machine
&& perf_guest
) {
715 pr_err("Can't find guest [%d]'s kernel information\n",
720 if (event
->header
.misc
& PERF_RECORD_MISC_EXACT_IP
)
723 if (perf_event__preprocess_sample(event
, session
, &al
, sample
,
724 symbol_filter
) < 0 ||
728 if (!kptr_restrict_warned
&&
729 symbol_conf
.kptr_restrict
&&
730 al
.cpumode
== PERF_RECORD_MISC_KERNEL
) {
732 "Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
733 "Check /proc/sys/kernel/kptr_restrict.\n\n"
734 "Kernel%s samples will not be resolved.\n",
735 !RB_EMPTY_ROOT(&al
.map
->dso
->symbols
[MAP__FUNCTION
]) ?
737 if (use_browser
<= 0)
739 kptr_restrict_warned
= true;
742 if (al
.sym
== NULL
) {
743 const char *msg
= "Kernel samples will not be resolved.\n";
745 * As we do lazy loading of symtabs we only will know if the
746 * specified vmlinux file is invalid when we actually have a
747 * hit in kernel space and then try to load it. So if we get
748 * here and there are _no_ symbols in the DSO backing the
749 * kernel map, bail out.
751 * We may never get here, for instance, if we use -K/
752 * --hide-kernel-symbols, even if the user specifies an
753 * invalid --vmlinux ;-)
755 if (!kptr_restrict_warned
&& !vmlinux_warned
&&
756 al
.map
== machine
->vmlinux_maps
[MAP__FUNCTION
] &&
757 RB_EMPTY_ROOT(&al
.map
->dso
->symbols
[MAP__FUNCTION
])) {
758 if (symbol_conf
.vmlinux_name
) {
759 ui__warning("The %s file can't be used.\n%s",
760 symbol_conf
.vmlinux_name
, msg
);
762 ui__warning("A vmlinux file was not found.\n%s",
766 if (use_browser
<= 0)
768 vmlinux_warned
= true;
772 if (al
.sym
== NULL
|| !al
.sym
->ignore
) {
773 struct perf_evsel
*evsel
;
774 struct hist_entry
*he
;
776 evsel
= perf_evlist__id2evsel(top
.evlist
, sample
->id
);
777 assert(evsel
!= NULL
);
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 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 if (event
->header
.type
== PERF_RECORD_SAMPLE
)
821 perf_event__process_sample(event
, &sample
, self
);
823 perf_event__process(event
, &sample
, self
);
827 static void perf_session__mmap_read(struct perf_session
*self
)
831 for (i
= 0; i
< top
.evlist
->nr_mmaps
; i
++)
832 perf_session__mmap_read_idx(self
, i
);
835 static void start_counters(struct perf_evlist
*evlist
)
837 struct perf_evsel
*counter
;
839 list_for_each_entry(counter
, &evlist
->entries
, node
) {
840 struct perf_event_attr
*attr
= &counter
->attr
;
842 attr
->sample_type
= PERF_SAMPLE_IP
| PERF_SAMPLE_TID
;
845 attr
->sample_type
|= PERF_SAMPLE_PERIOD
;
847 attr
->sample_freq
= top
.freq
;
850 if (evlist
->nr_entries
> 1) {
851 attr
->sample_type
|= PERF_SAMPLE_ID
;
852 attr
->read_format
|= PERF_FORMAT_ID
;
855 if (symbol_conf
.use_callchain
)
856 attr
->sample_type
|= PERF_SAMPLE_CALLCHAIN
;
860 attr
->inherit
= inherit
;
862 if (perf_evsel__open(counter
, top
.evlist
->cpus
,
863 top
.evlist
->threads
, group
) < 0) {
866 if (err
== EPERM
|| err
== EACCES
) {
867 ui__warning_paranoid();
871 * If it's cycles then fall back to hrtimer
872 * based cpu-clock-tick sw counter, which
873 * is always available even if no PMU support:
875 if (attr
->type
== PERF_TYPE_HARDWARE
&&
876 attr
->config
== PERF_COUNT_HW_CPU_CYCLES
) {
878 ui__warning("Cycles event not supported,\n"
879 "trying to fall back to cpu-clock-ticks\n");
881 attr
->type
= PERF_TYPE_SOFTWARE
;
882 attr
->config
= PERF_COUNT_SW_CPU_CLOCK
;
887 ui__warning("The %s event is not supported.\n",
888 event_name(counter
));
892 ui__warning("The sys_perf_event_open() syscall "
893 "returned with %d (%s). /bin/dmesg "
894 "may provide additional information.\n"
895 "No CONFIG_PERF_EVENTS=y kernel support "
896 "configured?\n", err
, strerror(err
));
901 if (perf_evlist__mmap(evlist
, mmap_pages
, false) < 0) {
902 ui__warning("Failed to mmap with %d (%s)\n",
903 errno
, strerror(errno
));
914 static int setup_sample_type(void)
916 if (!sort_has_symbols
) {
917 if (symbol_conf
.use_callchain
) {
918 ui__warning("Selected -g but \"sym\" not present in --sort/-s.");
921 } else if (!dont_use_callchains
&& callchain_param
.mode
!= CHAIN_NONE
) {
922 if (callchain_register_param(&callchain_param
) < 0) {
923 ui__warning("Can't register callchain params.\n");
931 static int __cmd_top(void)
936 * FIXME: perf_session__new should allow passing a O_MMAP, so that all this
937 * mmap reading, etc is encapsulated in it. Use O_WRONLY for now.
939 top
.session
= perf_session__new(NULL
, O_WRONLY
, false, false, NULL
);
940 if (top
.session
== NULL
)
943 ret
= setup_sample_type();
947 if (top
.target_tid
!= -1)
948 perf_event__synthesize_thread_map(top
.evlist
->threads
,
949 perf_event__process
, top
.session
);
951 perf_event__synthesize_threads(perf_event__process
, top
.session
);
953 start_counters(top
.evlist
);
954 top
.session
->evlist
= top
.evlist
;
955 perf_session__update_sample_type(top
.session
);
957 /* Wait for a minimal set of events before starting the snapshot */
958 poll(top
.evlist
->pollfd
, top
.evlist
->nr_fds
, 100);
960 perf_session__mmap_read(top
.session
);
962 if (pthread_create(&thread
, NULL
, (use_browser
> 0 ? display_thread_tui
:
963 display_thread
), NULL
)) {
964 printf("Could not create display thread.\n");
969 struct sched_param param
;
971 param
.sched_priority
= realtime_prio
;
972 if (sched_setscheduler(0, SCHED_FIFO
, ¶m
)) {
973 printf("Could not set realtime priority.\n");
979 u64 hits
= top
.samples
;
981 perf_session__mmap_read(top
.session
);
983 if (hits
== top
.samples
)
984 ret
= poll(top
.evlist
->pollfd
, top
.evlist
->nr_fds
, 100);
988 perf_session__delete(top
.session
);
995 parse_callchain_opt(const struct option
*opt __used
, const char *arg
,
1005 dont_use_callchains
= true;
1009 symbol_conf
.use_callchain
= true;
1014 tok
= strtok((char *)arg
, ",");
1018 /* get the output mode */
1019 if (!strncmp(tok
, "graph", strlen(arg
)))
1020 callchain_param
.mode
= CHAIN_GRAPH_ABS
;
1022 else if (!strncmp(tok
, "flat", strlen(arg
)))
1023 callchain_param
.mode
= CHAIN_FLAT
;
1025 else if (!strncmp(tok
, "fractal", strlen(arg
)))
1026 callchain_param
.mode
= CHAIN_GRAPH_REL
;
1028 else if (!strncmp(tok
, "none", strlen(arg
))) {
1029 callchain_param
.mode
= CHAIN_NONE
;
1030 symbol_conf
.use_callchain
= false;
1038 /* get the min percentage */
1039 tok
= strtok(NULL
, ",");
1043 callchain_param
.min_percent
= strtod(tok
, &endptr
);
1047 /* get the print limit */
1048 tok2
= strtok(NULL
, ",");
1052 if (tok2
[0] != 'c') {
1053 callchain_param
.print_limit
= strtod(tok2
, &endptr
);
1054 tok2
= strtok(NULL
, ",");
1059 /* get the call chain order */
1060 if (!strcmp(tok2
, "caller"))
1061 callchain_param
.order
= ORDER_CALLER
;
1062 else if (!strcmp(tok2
, "callee"))
1063 callchain_param
.order
= ORDER_CALLEE
;
1067 if (callchain_register_param(&callchain_param
) < 0) {
1068 fprintf(stderr
, "Can't register callchain params\n");
1074 static const char * const top_usage
[] = {
1075 "perf top [<options>]",
1079 static const struct option options
[] = {
1080 OPT_CALLBACK('e', "event", &top
.evlist
, "event",
1081 "event selector. use 'perf list' to list available events",
1082 parse_events_option
),
1083 OPT_INTEGER('c', "count", &default_interval
,
1084 "event period to sample"),
1085 OPT_INTEGER('p', "pid", &top
.target_pid
,
1086 "profile events on existing process id"),
1087 OPT_INTEGER('t', "tid", &top
.target_tid
,
1088 "profile events on existing thread id"),
1089 OPT_BOOLEAN('a', "all-cpus", &system_wide
,
1090 "system-wide collection from all CPUs"),
1091 OPT_STRING('C', "cpu", &top
.cpu_list
, "cpu",
1092 "list of cpus to monitor"),
1093 OPT_STRING('k', "vmlinux", &symbol_conf
.vmlinux_name
,
1094 "file", "vmlinux pathname"),
1095 OPT_BOOLEAN('K', "hide_kernel_symbols", &top
.hide_kernel_symbols
,
1096 "hide kernel symbols"),
1097 OPT_UINTEGER('m', "mmap-pages", &mmap_pages
, "number of mmap data pages"),
1098 OPT_INTEGER('r', "realtime", &realtime_prio
,
1099 "collect data with this RT SCHED_FIFO priority"),
1100 OPT_INTEGER('d', "delay", &top
.delay_secs
,
1101 "number of seconds to delay between refreshes"),
1102 OPT_BOOLEAN('D', "dump-symtab", &dump_symtab
,
1103 "dump the symbol table used for profiling"),
1104 OPT_INTEGER('f', "count-filter", &top
.count_filter
,
1105 "only display functions with more events than this"),
1106 OPT_BOOLEAN('g', "group", &group
,
1107 "put the counters into a counter group"),
1108 OPT_BOOLEAN('i', "inherit", &inherit
,
1109 "child tasks inherit counters"),
1110 OPT_STRING(0, "sym-annotate", &sym_filter
, "symbol name",
1111 "symbol to annotate"),
1112 OPT_BOOLEAN('z', "zero", &top
.zero
,
1113 "zero history across updates"),
1114 OPT_INTEGER('F', "freq", &top
.freq
,
1115 "profile at this frequency"),
1116 OPT_INTEGER('E', "entries", &top
.print_entries
,
1117 "display this many functions"),
1118 OPT_BOOLEAN('U', "hide_user_symbols", &top
.hide_user_symbols
,
1119 "hide user symbols"),
1120 OPT_BOOLEAN(0, "tui", &use_tui
, "Use the TUI interface"),
1121 OPT_BOOLEAN(0, "stdio", &use_stdio
, "Use the stdio interface"),
1122 OPT_INCR('v', "verbose", &verbose
,
1123 "be more verbose (show counter open errors, etc)"),
1124 OPT_STRING('s', "sort", &sort_order
, "key[,key2...]",
1125 "sort by key(s): pid, comm, dso, symbol, parent"),
1126 OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf
.show_nr_samples
,
1127 "Show a column with the number of samples"),
1128 OPT_CALLBACK_DEFAULT('G', "call-graph", NULL
, "output_type,min_percent, call_order",
1129 "Display callchains using output_type (graph, flat, fractal, or none), min percent threshold and callchain order. "
1130 "Default: fractal,0.5,callee", &parse_callchain_opt
,
1131 callchain_default_opt
),
1132 OPT_BOOLEAN(0, "show-total-period", &symbol_conf
.show_total_period
,
1133 "Show a column with the sum of periods"),
1134 OPT_STRING(0, "dsos", &symbol_conf
.dso_list_str
, "dso[,dso...]",
1135 "only consider symbols in these dsos"),
1136 OPT_STRING(0, "comms", &symbol_conf
.comm_list_str
, "comm[,comm...]",
1137 "only consider symbols in these comms"),
1138 OPT_STRING(0, "symbols", &symbol_conf
.sym_list_str
, "symbol[,symbol...]",
1139 "only consider these symbols"),
1140 OPT_BOOLEAN(0, "source", &symbol_conf
.annotate_src
,
1141 "Interleave source code with assembly code (default)"),
1142 OPT_BOOLEAN(0, "asm-raw", &symbol_conf
.annotate_asm_raw
,
1143 "Display raw encoding of assembly instructions (default)"),
1144 OPT_STRING('M', "disassembler-style", &disassembler_style
, "disassembler style",
1145 "Specify disassembler style (e.g. -M intel for intel syntax)"),
1149 int cmd_top(int argc
, const char **argv
, const char *prefix __used
)
1151 struct perf_evsel
*pos
;
1152 int status
= -ENOMEM
;
1154 top
.evlist
= perf_evlist__new(NULL
, NULL
);
1155 if (top
.evlist
== NULL
)
1158 symbol_conf
.exclude_other
= false;
1160 argc
= parse_options(argc
, argv
, options
, top_usage
, 0);
1162 usage_with_options(top_usage
, options
);
1164 if (sort_order
== default_sort_order
)
1165 sort_order
= "dso,symbol";
1167 setup_sorting(top_usage
, options
);
1174 setup_browser(false);
1176 /* CPU and PID are mutually exclusive */
1177 if (top
.target_tid
> 0 && top
.cpu_list
) {
1178 printf("WARNING: PID switch overriding CPU\n");
1180 top
.cpu_list
= NULL
;
1183 if (top
.target_pid
!= -1)
1184 top
.target_tid
= top
.target_pid
;
1186 if (perf_evlist__create_maps(top
.evlist
, top
.target_pid
,
1187 top
.target_tid
, top
.cpu_list
) < 0)
1188 usage_with_options(top_usage
, options
);
1190 if (!top
.evlist
->nr_entries
&&
1191 perf_evlist__add_default(top
.evlist
) < 0) {
1192 pr_err("Not enough memory for event selector list\n");
1196 if (top
.delay_secs
< 1)
1200 * User specified count overrides default frequency.
1202 if (default_interval
)
1204 else if (top
.freq
) {
1205 default_interval
= top
.freq
;
1207 fprintf(stderr
, "frequency and count are zero, aborting\n");
1211 list_for_each_entry(pos
, &top
.evlist
->entries
, node
) {
1212 if (perf_evsel__alloc_fd(pos
, top
.evlist
->cpus
->nr
,
1213 top
.evlist
->threads
->nr
) < 0)
1216 * Fill in the ones not specifically initialized via -c:
1218 if (pos
->attr
.sample_period
)
1221 pos
->attr
.sample_period
= default_interval
;
1224 if (perf_evlist__alloc_pollfd(top
.evlist
) < 0 ||
1225 perf_evlist__alloc_mmap(top
.evlist
) < 0)
1228 top
.sym_evsel
= list_entry(top
.evlist
->entries
.next
, struct perf_evsel
, node
);
1230 symbol_conf
.priv_size
= sizeof(struct annotation
);
1232 symbol_conf
.try_vmlinux_path
= (symbol_conf
.vmlinux_name
== NULL
);
1233 if (symbol__init() < 0)
1236 sort_entry__setup_elide(&sort_dso
, symbol_conf
.dso_list
, "dso", stdout
);
1237 sort_entry__setup_elide(&sort_comm
, symbol_conf
.comm_list
, "comm", stdout
);
1238 sort_entry__setup_elide(&sort_sym
, symbol_conf
.sym_list
, "symbol", stdout
);
1241 * Avoid annotation data structures overhead when symbols aren't on the
1244 sort_has_symbols
= sort_sym
.list
.next
!= NULL
;
1246 get_term_dimensions(&winsize
);
1247 if (top
.print_entries
== 0) {
1248 update_print_entries(&winsize
);
1249 signal(SIGWINCH
, sig_winch_handler
);
1252 status
= __cmd_top();
1254 perf_evlist__delete(top
.evlist
);