/* * builtin-top.c * * Builtin top command: Display a continuously updated profile of * any workload, CPU or specific PID. * * Copyright (C) 2008, Red Hat Inc, Ingo Molnar * 2011, Red Hat Inc, Arnaldo Carvalho de Melo * * Improvements and fixes by: * * Arjan van de Ven * Yanmin Zhang * Wu Fengguang * Mike Galbraith * Paul Mackerras * * Released under the GPL v2. (and only v2, not any later version) */ #include "builtin.h" #include "perf.h" #include "util/annotate.h" #include "util/cache.h" #include "util/color.h" #include "util/evlist.h" #include "util/evsel.h" #include "util/machine.h" #include "util/session.h" #include "util/symbol.h" #include "util/thread.h" #include "util/thread_map.h" #include "util/top.h" #include "util/util.h" #include #include "util/parse-options.h" #include "util/parse-events.h" #include "util/cpumap.h" #include "util/xyarray.h" #include "util/sort.h" #include "util/intlist.h" #include "arch/common.h" #include "util/debug.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static volatile int done; #define HEADER_LINE_NR 5 static void perf_top__update_print_entries(struct perf_top *top) { top->print_entries = top->winsize.ws_row - HEADER_LINE_NR; } static void perf_top__sig_winch(int sig __maybe_unused, siginfo_t *info __maybe_unused, void *arg) { struct perf_top *top = arg; get_term_dimensions(&top->winsize); perf_top__update_print_entries(top); } static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he) { struct symbol *sym; struct annotation *notes; struct map *map; int err = -1; if (!he || !he->ms.sym) return -1; sym = he->ms.sym; map = he->ms.map; /* * We can't annotate with just /proc/kallsyms */ if (map->dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS && !dso__is_kcore(map->dso)) { pr_err("Can't annotate %s: No vmlinux file was found in the " "path\n", sym->name); sleep(1); return -1; } notes = symbol__annotation(sym); if (notes->src != NULL) { pthread_mutex_lock(¬es->lock); goto out_assign; } pthread_mutex_lock(¬es->lock); if (symbol__alloc_hist(sym) < 0) { pthread_mutex_unlock(¬es->lock); pr_err("Not enough memory for annotating '%s' symbol!\n", sym->name); sleep(1); return err; } err = symbol__annotate(sym, map, 0); if (err == 0) { out_assign: top->sym_filter_entry = he; } pthread_mutex_unlock(¬es->lock); return err; } static void __zero_source_counters(struct hist_entry *he) { struct symbol *sym = he->ms.sym; symbol__annotate_zero_histograms(sym); } static void ui__warn_map_erange(struct map *map, struct symbol *sym, u64 ip) { struct utsname uts; int err = uname(&uts); ui__warning("Out of bounds address found:\n\n" "Addr: %" PRIx64 "\n" "DSO: %s %c\n" "Map: %" PRIx64 "-%" PRIx64 "\n" "Symbol: %" PRIx64 "-%" PRIx64 " %c %s\n" "Arch: %s\n" "Kernel: %s\n" "Tools: %s\n\n" "Not all samples will be on the annotation output.\n\n" "Please report to linux-kernel@vger.kernel.org\n", ip, map->dso->long_name, dso__symtab_origin(map->dso), map->start, map->end, sym->start, sym->end, sym->binding == STB_GLOBAL ? 'g' : sym->binding == STB_LOCAL ? 'l' : 'w', sym->name, err ? "[unknown]" : uts.machine, err ? "[unknown]" : uts.release, perf_version_string); if (use_browser <= 0) sleep(5); map->erange_warned = true; } static void perf_top__record_precise_ip(struct perf_top *top, struct hist_entry *he, int counter, u64 ip) { struct annotation *notes; struct symbol *sym; int err; if (he == NULL || he->ms.sym == NULL || ((top->sym_filter_entry == NULL || top->sym_filter_entry->ms.sym != he->ms.sym) && use_browser != 1)) return; sym = he->ms.sym; notes = symbol__annotation(sym); if (pthread_mutex_trylock(¬es->lock)) return; if (notes->src == NULL && symbol__alloc_hist(sym) < 0) { pthread_mutex_unlock(¬es->lock); pr_err("Not enough memory for annotating '%s' symbol!\n", sym->name); sleep(1); return; } ip = he->ms.map->map_ip(he->ms.map, ip); err = symbol__inc_addr_samples(sym, he->ms.map, counter, ip); pthread_mutex_unlock(¬es->lock); if (err == -ERANGE && !he->ms.map->erange_warned) ui__warn_map_erange(he->ms.map, sym, ip); } static void perf_top__show_details(struct perf_top *top) { struct hist_entry *he = top->sym_filter_entry; struct annotation *notes; struct symbol *symbol; int more; if (!he) return; symbol = he->ms.sym; notes = symbol__annotation(symbol); pthread_mutex_lock(¬es->lock); if (notes->src == NULL) goto out_unlock; printf("Showing %s for %s\n", perf_evsel__name(top->sym_evsel), symbol->name); printf(" Events Pcnt (>=%d%%)\n", top->sym_pcnt_filter); more = symbol__annotate_printf(symbol, he->ms.map, top->sym_evsel, 0, top->sym_pcnt_filter, top->print_entries, 4); if (top->zero) symbol__annotate_zero_histogram(symbol, top->sym_evsel->idx); else symbol__annotate_decay_histogram(symbol, top->sym_evsel->idx); if (more != 0) printf("%d lines not displayed, maybe increase display entries [e]\n", more); out_unlock: pthread_mutex_unlock(¬es->lock); } static struct hist_entry *perf_evsel__add_hist_entry(struct perf_evsel *evsel, struct addr_location *al, struct perf_sample *sample) { struct hist_entry *he; pthread_mutex_lock(&evsel->hists.lock); he = __hists__add_entry(&evsel->hists, al, NULL, sample->period, sample->weight); pthread_mutex_unlock(&evsel->hists.lock); if (he == NULL) return NULL; hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE); return he; } static void perf_top__print_sym_table(struct perf_top *top) { char bf[160]; int printed = 0; const int win_width = top->winsize.ws_col - 1; puts(CONSOLE_CLEAR); perf_top__header_snprintf(top, bf, sizeof(bf)); printf("%s\n", bf); perf_top__reset_sample_counters(top); printf("%-*.*s\n", win_width, win_width, graph_dotted_line); if (top->sym_evsel->hists.stats.nr_lost_warned != top->sym_evsel->hists.stats.nr_events[PERF_RECORD_LOST]) { top->sym_evsel->hists.stats.nr_lost_warned = top->sym_evsel->hists.stats.nr_events[PERF_RECORD_LOST]; color_fprintf(stdout, PERF_COLOR_RED, "WARNING: LOST %d chunks, Check IO/CPU overload", top->sym_evsel->hists.stats.nr_lost_warned); ++printed; } if (top->sym_filter_entry) { perf_top__show_details(top); return; } hists__collapse_resort(&top->sym_evsel->hists); hists__output_resort(&top->sym_evsel->hists); hists__decay_entries(&top->sym_evsel->hists, top->hide_user_symbols, top->hide_kernel_symbols); hists__output_recalc_col_len(&top->sym_evsel->hists, top->print_entries - printed); putchar('\n'); hists__fprintf(&top->sym_evsel->hists, false, top->print_entries - printed, win_width, top->min_percent, stdout); } static void prompt_integer(int *target, const char *msg) { char *buf = malloc(0), *p; size_t dummy = 0; int tmp; fprintf(stdout, "\n%s: ", msg); if (getline(&buf, &dummy, stdin) < 0) return; p = strchr(buf, '\n'); if (p) *p = 0; p = buf; while(*p) { if (!isdigit(*p)) goto out_free; p++; } tmp = strtoul(buf, NULL, 10); *target = tmp; out_free: free(buf); } static void prompt_percent(int *target, const char *msg) { int tmp = 0; prompt_integer(&tmp, msg); if (tmp >= 0 && tmp <= 100) *target = tmp; } static void perf_top__prompt_symbol(struct perf_top *top, const char *msg) { char *buf = malloc(0), *p; struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL; struct rb_node *next; size_t dummy = 0; /* zero counters of active symbol */ if (syme) { __zero_source_counters(syme); top->sym_filter_entry = NULL; } fprintf(stdout, "\n%s: ", msg); if (getline(&buf, &dummy, stdin) < 0) goto out_free; p = strchr(buf, '\n'); if (p) *p = 0; next = rb_first(&top->sym_evsel->hists.entries); while (next) { n = rb_entry(next, struct hist_entry, rb_node); if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) { found = n; break; } next = rb_next(&n->rb_node); } if (!found) { fprintf(stderr, "Sorry, %s is not active.\n", buf); sleep(1); } else perf_top__parse_source(top, found); out_free: free(buf); } static void perf_top__print_mapped_keys(struct perf_top *top) { char *name = NULL; if (top->sym_filter_entry) { struct symbol *sym = top->sym_filter_entry->ms.sym; name = sym->name; } fprintf(stdout, "\nMapped keys:\n"); fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", top->delay_secs); fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", top->print_entries); if (top->evlist->nr_entries > 1) fprintf(stdout, "\t[E] active event counter. \t(%s)\n", perf_evsel__name(top->sym_evsel)); fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", top->count_filter); fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", top->sym_pcnt_filter); fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL"); fprintf(stdout, "\t[S] stop annotation.\n"); fprintf(stdout, "\t[K] hide kernel_symbols symbols. \t(%s)\n", top->hide_kernel_symbols ? "yes" : "no"); fprintf(stdout, "\t[U] hide user symbols. \t(%s)\n", top->hide_user_symbols ? "yes" : "no"); fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", top->zero ? 1 : 0); fprintf(stdout, "\t[qQ] quit.\n"); } static int perf_top__key_mapped(struct perf_top *top, int c) { switch (c) { case 'd': case 'e': case 'f': case 'z': case 'q': case 'Q': case 'K': case 'U': case 'F': case 's': case 'S': return 1; case 'E': return top->evlist->nr_entries > 1 ? 1 : 0; default: break; } return 0; } static bool perf_top__handle_keypress(struct perf_top *top, int c) { bool ret = true; if (!perf_top__key_mapped(top, c)) { struct pollfd stdin_poll = { .fd = 0, .events = POLLIN }; struct termios tc, save; perf_top__print_mapped_keys(top); fprintf(stdout, "\nEnter selection, or unmapped key to continue: "); fflush(stdout); tcgetattr(0, &save); tc = save; tc.c_lflag &= ~(ICANON | ECHO); tc.c_cc[VMIN] = 0; tc.c_cc[VTIME] = 0; tcsetattr(0, TCSANOW, &tc); poll(&stdin_poll, 1, -1); c = getc(stdin); tcsetattr(0, TCSAFLUSH, &save); if (!perf_top__key_mapped(top, c)) return ret; } switch (c) { case 'd': prompt_integer(&top->delay_secs, "Enter display delay"); if (top->delay_secs < 1) top->delay_secs = 1; break; case 'e': prompt_integer(&top->print_entries, "Enter display entries (lines)"); if (top->print_entries == 0) { struct sigaction act = { .sa_sigaction = perf_top__sig_winch, .sa_flags = SA_SIGINFO, }; perf_top__sig_winch(SIGWINCH, NULL, top); sigaction(SIGWINCH, &act, NULL); } else { signal(SIGWINCH, SIG_DFL); } break; case 'E': if (top->evlist->nr_entries > 1) { /* Select 0 as the default event: */ int counter = 0; fprintf(stderr, "\nAvailable events:"); list_for_each_entry(top->sym_evsel, &top->evlist->entries, node) fprintf(stderr, "\n\t%d %s", top->sym_evsel->idx, perf_evsel__name(top->sym_evsel)); prompt_integer(&counter, "Enter details event counter"); if (counter >= top->evlist->nr_entries) { top->sym_evsel = perf_evlist__first(top->evlist); fprintf(stderr, "Sorry, no such event, using %s.\n", perf_evsel__name(top->sym_evsel)); sleep(1); break; } list_for_each_entry(top->sym_evsel, &top->evlist->entries, node) if (top->sym_evsel->idx == counter) break; } else top->sym_evsel = perf_evlist__first(top->evlist); break; case 'f': prompt_integer(&top->count_filter, "Enter display event count filter"); break; case 'F': prompt_percent(&top->sym_pcnt_filter, "Enter details display event filter (percent)"); break; case 'K': top->hide_kernel_symbols = !top->hide_kernel_symbols; break; case 'q': case 'Q': printf("exiting.\n"); if (top->dump_symtab) perf_session__fprintf_dsos(top->session, stderr); ret = false; break; case 's': perf_top__prompt_symbol(top, "Enter details symbol"); break; case 'S': if (!top->sym_filter_entry) break; else { struct hist_entry *syme = top->sym_filter_entry; top->sym_filter_entry = NULL; __zero_source_counters(syme); } break; case 'U': top->hide_user_symbols = !top->hide_user_symbols; break; case 'z': top->zero = !top->zero; break; default: break; } return ret; } static void perf_top__sort_new_samples(void *arg) { struct perf_top *t = arg; perf_top__reset_sample_counters(t); if (t->evlist->selected != NULL) t->sym_evsel = t->evlist->selected; hists__collapse_resort(&t->sym_evsel->hists); hists__output_resort(&t->sym_evsel->hists); hists__decay_entries(&t->sym_evsel->hists, t->hide_user_symbols, t->hide_kernel_symbols); } static void *display_thread_tui(void *arg) { struct perf_evsel *pos; struct perf_top *top = arg; const char *help = "For a higher level overview, try: perf top --sort comm,dso"; struct hist_browser_timer hbt = { .timer = perf_top__sort_new_samples, .arg = top, .refresh = top->delay_secs, }; perf_top__sort_new_samples(top); /* * Initialize the uid_filter_str, in the future the TUI will allow * Zooming in/out UIDs. For now juse use whatever the user passed * via --uid. */ list_for_each_entry(pos, &top->evlist->entries, node) pos->hists.uid_filter_str = top->record_opts.target.uid_str; perf_evlist__tui_browse_hists(top->evlist, help, &hbt, top->min_percent, &top->session->header.env); done = 1; return NULL; } static void *display_thread(void *arg) { struct pollfd stdin_poll = { .fd = 0, .events = POLLIN }; struct termios tc, save; struct perf_top *top = arg; int delay_msecs, c; tcgetattr(0, &save); tc = save; tc.c_lflag &= ~(ICANON | ECHO); tc.c_cc[VMIN] = 0; tc.c_cc[VTIME] = 0; pthread__unblock_sigwinch(); repeat: delay_msecs = top->delay_secs * 1000; tcsetattr(0, TCSANOW, &tc); /* trash return*/ getc(stdin); while (!done) { perf_top__print_sym_table(top); /* * Either timeout expired or we got an EINTR due to SIGWINCH, * refresh screen in both cases. */ switch (poll(&stdin_poll, 1, delay_msecs)) { case 0: continue; case -1: if (errno == EINTR) continue; /* Fall trhu */ default: c = getc(stdin); tcsetattr(0, TCSAFLUSH, &save); if (perf_top__handle_keypress(top, c)) goto repeat; done = 1; } } return NULL; } /* Tag samples to be skipped. */ static const char *skip_symbols[] = { "intel_idle", "default_idle", "native_safe_halt", "cpu_idle", "enter_idle", "exit_idle", "mwait_idle", "mwait_idle_with_hints", "poll_idle", "ppc64_runlatch_off", "pseries_dedicated_idle_sleep", NULL }; static int symbol_filter(struct map *map __maybe_unused, struct symbol *sym) { const char *name = sym->name; int i; /* * ppc64 uses function descriptors and appends a '.' to the * start of every instruction address. Remove it. */ if (name[0] == '.') name++; if (!strcmp(name, "_text") || !strcmp(name, "_etext") || !strcmp(name, "_sinittext") || !strncmp("init_module", name, 11) || !strncmp("cleanup_module", name, 14) || strstr(name, "_text_start") || strstr(name, "_text_end")) return 1; for (i = 0; skip_symbols[i]; i++) { if (!strcmp(skip_symbols[i], name)) { sym->ignore = true; break; } } return 0; } static void perf_event__process_sample(struct perf_tool *tool, const union perf_event *event, struct perf_evsel *evsel, struct perf_sample *sample, struct machine *machine) { struct perf_top *top = container_of(tool, struct perf_top, tool); struct symbol *parent = NULL; u64 ip = sample->ip; struct addr_location al; int err; if (!machine && perf_guest) { static struct intlist *seen; if (!seen) seen = intlist__new(NULL); if (!intlist__has_entry(seen, sample->pid)) { pr_err("Can't find guest [%d]'s kernel information\n", sample->pid); intlist__add(seen, sample->pid); } return; } if (!machine) { pr_err("%u unprocessable samples recorded.\r", top->session->stats.nr_unprocessable_samples++); return; } if (event->header.misc & PERF_RECORD_MISC_EXACT_IP) top->exact_samples++; if (perf_event__preprocess_sample(event, machine, &al, sample) < 0 || al.filtered) return; if (!top->kptr_restrict_warned && symbol_conf.kptr_restrict && al.cpumode == PERF_RECORD_MISC_KERNEL) { ui__warning( "Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n" "Check /proc/sys/kernel/kptr_restrict.\n\n" "Kernel%s samples will not be resolved.\n", !RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ? " modules" : ""); if (use_browser <= 0) sleep(5); top->kptr_restrict_warned = true; } if (al.sym == NULL) { const char *msg = "Kernel samples will not be resolved.\n"; /* * As we do lazy loading of symtabs we only will know if the * specified vmlinux file is invalid when we actually have a * hit in kernel space and then try to load it. So if we get * here and there are _no_ symbols in the DSO backing the * kernel map, bail out. * * We may never get here, for instance, if we use -K/ * --hide-kernel-symbols, even if the user specifies an * invalid --vmlinux ;-) */ if (!top->kptr_restrict_warned && !top->vmlinux_warned && al.map == machine->vmlinux_maps[MAP__FUNCTION] && RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) { if (symbol_conf.vmlinux_name) { ui__warning("The %s file can't be used.\n%s", symbol_conf.vmlinux_name, msg); } else { ui__warning("A vmlinux file was not found.\n%s", msg); } if (use_browser <= 0) sleep(5); top->vmlinux_warned = true; } } if (al.sym == NULL || !al.sym->ignore) { struct hist_entry *he; if ((sort__has_parent || symbol_conf.use_callchain) && sample->callchain) { err = machine__resolve_callchain(machine, evsel, al.thread, sample, &parent, &al); if (err) return; } he = perf_evsel__add_hist_entry(evsel, &al, sample); if (he == NULL) { pr_err("Problem incrementing symbol period, skipping event\n"); return; } if (symbol_conf.use_callchain) { err = callchain_append(he->callchain, &callchain_cursor, sample->period); if (err) return; } if (sort__has_sym) perf_top__record_precise_ip(top, he, evsel->idx, ip); } return; } static void perf_top__mmap_read_idx(struct perf_top *top, int idx) { struct perf_sample sample; struct perf_evsel *evsel; struct perf_session *session = top->session; union perf_event *event; struct machine *machine; u8 origin; int ret; while ((event = perf_evlist__mmap_read(top->evlist, idx)) != NULL) { ret = perf_evlist__parse_sample(top->evlist, event, &sample); if (ret) { pr_err("Can't parse sample, err = %d\n", ret); continue; } evsel = perf_evlist__id2evsel(session->evlist, sample.id); assert(evsel != NULL); origin = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; if (event->header.type == PERF_RECORD_SAMPLE) ++top->samples; switch (origin) { case PERF_RECORD_MISC_USER: ++top->us_samples; if (top->hide_user_symbols) continue; machine = &session->machines.host; break; case PERF_RECORD_MISC_KERNEL: ++top->kernel_samples; if (top->hide_kernel_symbols) continue; machine = &session->machines.host; break; case PERF_RECORD_MISC_GUEST_KERNEL: ++top->guest_kernel_samples; machine = perf_session__find_machine(session, sample.pid); break; case PERF_RECORD_MISC_GUEST_USER: ++top->guest_us_samples; /* * TODO: we don't process guest user from host side * except simple counting. */ /* Fall thru */ default: continue; } if (event->header.type == PERF_RECORD_SAMPLE) { perf_event__process_sample(&top->tool, event, evsel, &sample, machine); } else if (event->header.type < PERF_RECORD_MAX) { hists__inc_nr_events(&evsel->hists, event->header.type); machine__process_event(machine, event); } else ++session->stats.nr_unknown_events; } } static void perf_top__mmap_read(struct perf_top *top) { int i; for (i = 0; i < top->evlist->nr_mmaps; i++) perf_top__mmap_read_idx(top, i); } static int perf_top__start_counters(struct perf_top *top) { char msg[512]; struct perf_evsel *counter; struct perf_evlist *evlist = top->evlist; struct perf_record_opts *opts = &top->record_opts; perf_evlist__config(evlist, opts); list_for_each_entry(counter, &evlist->entries, node) { try_again: if (perf_evsel__open(counter, top->evlist->cpus, top->evlist->threads) < 0) { if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) { if (verbose) ui__warning("%s\n", msg); goto try_again; } perf_evsel__open_strerror(counter, &opts->target, errno, msg, sizeof(msg)); ui__error("%s\n", msg); goto out_err; } } if (perf_evlist__mmap(evlist, opts->mmap_pages, false) < 0) { ui__error("Failed to mmap with %d (%s)\n", errno, strerror(errno)); goto out_err; } return 0; out_err: return -1; } static int perf_top__setup_sample_type(struct perf_top *top __maybe_unused) { if (!sort__has_sym) { if (symbol_conf.use_callchain) { ui__error("Selected -g but \"sym\" not present in --sort/-s."); return -EINVAL; } } else if (callchain_param.mode != CHAIN_NONE) { if (callchain_register_param(&callchain_param) < 0) { ui__error("Can't register callchain params.\n"); return -EINVAL; } } return 0; } static int __cmd_top(struct perf_top *top) { struct perf_record_opts *opts = &top->record_opts; pthread_t thread; int ret; /* * FIXME: perf_session__new should allow passing a O_MMAP, so that all this * mmap reading, etc is encapsulated in it. Use O_WRONLY for now. */ top->session = perf_session__new(NULL, O_WRONLY, false, false, NULL); if (top->session == NULL) return -ENOMEM; machines__set_symbol_filter(&top->session->machines, symbol_filter); if (!objdump_path) { ret = perf_session_env__lookup_objdump(&top->session->header.env); if (ret) goto out_delete; } ret = perf_top__setup_sample_type(top); if (ret) goto out_delete; if (perf_target__has_task(&opts->target)) perf_event__synthesize_thread_map(&top->tool, top->evlist->threads, perf_event__process, &top->session->machines.host); else perf_event__synthesize_threads(&top->tool, perf_event__process, &top->session->machines.host); ret = perf_top__start_counters(top); if (ret) goto out_delete; top->session->evlist = top->evlist; perf_session__set_id_hdr_size(top->session); /* * When perf is starting the traced process, all the events (apart from * group members) have enable_on_exec=1 set, so don't spoil it by * prematurely enabling them. * * XXX 'top' still doesn't start workloads like record, trace, but should, * so leave the check here. */ if (!perf_target__none(&opts->target)) perf_evlist__enable(top->evlist); /* Wait for a minimal set of events before starting the snapshot */ poll(top->evlist->pollfd, top->evlist->nr_fds, 100); perf_top__mmap_read(top); ret = -1; if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui : display_thread), top)) { ui__error("Could not create display thread.\n"); goto out_delete; } if (top->realtime_prio) { struct sched_param param; param.sched_priority = top->realtime_prio; if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { ui__error("Could not set realtime priority.\n"); goto out_delete; } } while (!done) { u64 hits = top->samples; perf_top__mmap_read(top); if (hits == top->samples) ret = poll(top->evlist->pollfd, top->evlist->nr_fds, 100); } ret = 0; out_delete: perf_session__delete(top->session); top->session = NULL; return ret; } static int parse_callchain_opt(const struct option *opt, const char *arg, int unset) { /* * --no-call-graph */ if (unset) return 0; symbol_conf.use_callchain = true; return record_parse_callchain_opt(opt, arg, unset); } static int parse_percent_limit(const struct option *opt, const char *arg, int unset __maybe_unused) { struct perf_top *top = opt->value; top->min_percent = strtof(arg, NULL); return 0; } int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused) { int status; char errbuf[BUFSIZ]; struct perf_top top = { .count_filter = 5, .delay_secs = 2, .record_opts = { .mmap_pages = UINT_MAX, .user_freq = UINT_MAX, .user_interval = ULLONG_MAX, .freq = 4000, /* 4 KHz */ .target = { .uses_mmap = true, }, }, .sym_pcnt_filter = 5, }; struct perf_record_opts *opts = &top.record_opts; struct perf_target *target = &opts->target; const struct option options[] = { OPT_CALLBACK('e', "event", &top.evlist, "event", "event selector. use 'perf list' to list available events", parse_events_option), OPT_U64('c', "count", &opts->user_interval, "event period to sample"), OPT_STRING('p', "pid", &target->pid, "pid", "profile events on existing process id"), OPT_STRING('t', "tid", &target->tid, "tid", "profile events on existing thread id"), OPT_BOOLEAN('a', "all-cpus", &target->system_wide, "system-wide collection from all CPUs"), OPT_STRING('C', "cpu", &target->cpu_list, "cpu", "list of cpus to monitor"), OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name, "file", "vmlinux pathname"), OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols, "hide kernel symbols"), OPT_UINTEGER('m', "mmap-pages", &opts->mmap_pages, "number of mmap data pages"), OPT_INTEGER('r', "realtime", &top.realtime_prio, "collect data with this RT SCHED_FIFO priority"), OPT_INTEGER('d', "delay", &top.delay_secs, "number of seconds to delay between refreshes"), OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab, "dump the symbol table used for profiling"), OPT_INTEGER('f', "count-filter", &top.count_filter, "only display functions with more events than this"), OPT_BOOLEAN('g', "group", &opts->group, "put the counters into a counter group"), OPT_BOOLEAN('i', "no-inherit", &opts->no_inherit, "child tasks do not inherit counters"), OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name", "symbol to annotate"), OPT_BOOLEAN('z', "zero", &top.zero, "zero history across updates"), OPT_UINTEGER('F', "freq", &opts->user_freq, "profile at this frequency"), OPT_INTEGER('E', "entries", &top.print_entries, "display this many functions"), OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols, "hide user symbols"), OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"), OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"), OPT_INCR('v', "verbose", &verbose, "be more verbose (show counter open errors, etc)"), OPT_STRING('s', "sort", &sort_order, "key[,key2...]", "sort by key(s): pid, comm, dso, symbol, parent, weight, local_weight," " abort, in_tx"), OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples, "Show a column with the number of samples"), OPT_CALLBACK_DEFAULT('G', "call-graph", &top.record_opts, "mode[,dump_size]", record_callchain_help, &parse_callchain_opt, "fp"), OPT_CALLBACK(0, "ignore-callees", NULL, "regex", "ignore callees of these functions in call graphs", report_parse_ignore_callees_opt), OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period, "Show a column with the sum of periods"), OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]", "only consider symbols in these dsos"), OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]", "only consider symbols in these comms"), OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]", "only consider these symbols"), OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src, "Interleave source code with assembly code (default)"), OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw, "Display raw encoding of assembly instructions (default)"), OPT_STRING(0, "objdump", &objdump_path, "path", "objdump binary to use for disassembly and annotations"), OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style", "Specify disassembler style (e.g. -M intel for intel syntax)"), OPT_STRING('u', "uid", &target->uid_str, "user", "user to profile"), OPT_CALLBACK(0, "percent-limit", &top, "percent", "Don't show entries under that percent", parse_percent_limit), OPT_END() }; const char * const top_usage[] = { "perf top []", NULL }; top.evlist = perf_evlist__new(); if (top.evlist == NULL) return -ENOMEM; argc = parse_options(argc, argv, options, top_usage, 0); if (argc) usage_with_options(top_usage, options); if (sort_order == default_sort_order) sort_order = "dso,symbol"; if (setup_sorting() < 0) usage_with_options(top_usage, options); /* display thread wants entries to be collapsed in a different tree */ sort__need_collapse = 1; if (top.use_stdio) use_browser = 0; else if (top.use_tui) use_browser = 1; setup_browser(false); status = perf_target__validate(target); if (status) { perf_target__strerror(target, status, errbuf, BUFSIZ); ui__warning("%s", errbuf); } status = perf_target__parse_uid(target); if (status) { int saved_errno = errno; perf_target__strerror(target, status, errbuf, BUFSIZ); ui__error("%s", errbuf); status = -saved_errno; goto out_delete_evlist; } if (perf_target__none(target)) target->system_wide = true; if (perf_evlist__create_maps(top.evlist, target) < 0) usage_with_options(top_usage, options); if (!top.evlist->nr_entries && perf_evlist__add_default(top.evlist) < 0) { ui__error("Not enough memory for event selector list\n"); goto out_delete_maps; } symbol_conf.nr_events = top.evlist->nr_entries; if (top.delay_secs < 1) top.delay_secs = 1; if (opts->user_interval != ULLONG_MAX) opts->default_interval = opts->user_interval; if (opts->user_freq != UINT_MAX) opts->freq = opts->user_freq; /* * User specified count overrides default frequency. */ if (opts->default_interval) opts->freq = 0; else if (opts->freq) { opts->default_interval = opts->freq; } else { ui__error("frequency and count are zero, aborting\n"); status = -EINVAL; goto out_delete_maps; } top.sym_evsel = perf_evlist__first(top.evlist); symbol_conf.priv_size = sizeof(struct annotation); symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL); if (symbol__init() < 0) return -1; sort__setup_elide(stdout); get_term_dimensions(&top.winsize); if (top.print_entries == 0) { struct sigaction act = { .sa_sigaction = perf_top__sig_winch, .sa_flags = SA_SIGINFO, }; perf_top__update_print_entries(&top); sigaction(SIGWINCH, &act, NULL); } status = __cmd_top(&top); out_delete_maps: perf_evlist__delete_maps(top.evlist); out_delete_evlist: perf_evlist__delete(top.evlist); return status; }