| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Arnaldo Carvalho de Melo | 2957 | 38.30% | 146 | 48.50% |
| Jiri Olsa | 1508 | 19.53% | 30 | 9.97% |
| Mike Galbraith | 836 | 10.83% | 7 | 2.33% |
| Namhyung Kim | 772 | 10.00% | 41 | 13.62% |
| Kan Liang | 552 | 7.15% | 10 | 3.32% |
| Ingo Molnar | 544 | 7.05% | 14 | 4.65% |
| Mathieu J. Poirier | 79 | 1.02% | 1 | 0.33% |
| Andi Kleen | 65 | 0.84% | 1 | 0.33% |
| David Ahern | 54 | 0.70% | 6 | 1.99% |
| Sukadev Bhattiprolu | 44 | 0.57% | 1 | 0.33% |
| Yanmin Zhang | 30 | 0.39% | 2 | 0.66% |
| Frédéric Weisbecker | 28 | 0.36% | 4 | 1.33% |
| Krister Johansen | 26 | 0.34% | 1 | 0.33% |
| Waiman Long | 22 | 0.28% | 1 | 0.33% |
| Joerg Roedel | 21 | 0.27% | 1 | 0.33% |
| Jin Yao | 18 | 0.23% | 2 | 0.66% |
| David S. Miller | 15 | 0.19% | 1 | 0.33% |
| Greg Price | 15 | 0.19% | 1 | 0.33% |
| Willy Tarreau | 14 | 0.18% | 1 | 0.33% |
| Avi Kivity | 14 | 0.18% | 1 | 0.33% |
| Peter Zijlstra | 14 | 0.18% | 3 | 1.00% |
| Kirill Smelkov | 13 | 0.17% | 3 | 1.00% |
| Taeung Song | 13 | 0.17% | 3 | 1.00% |
| Yisheng Xie | 12 | 0.16% | 1 | 0.33% |
| Adrian Hunter | 11 | 0.14% | 2 | 0.66% |
| Tim Blechmann | 10 | 0.13% | 1 | 0.33% |
| Stéphane Eranian | 8 | 0.10% | 2 | 0.66% |
| Wang Nan | 6 | 0.08% | 2 | 0.66% |
| Masami Hiramatsu | 4 | 0.05% | 2 | 0.66% |
| Ian Munsie | 3 | 0.04% | 2 | 0.66% |
| Paul Mackerras | 3 | 0.04% | 1 | 0.33% |
| Akihiro Nagai | 3 | 0.04% | 1 | 0.33% |
| Tom Zanussi | 2 | 0.03% | 1 | 0.33% |
| Anton Blanchard | 1 | 0.01% | 1 | 0.33% |
| Thomas Gleixner | 1 | 0.01% | 1 | 0.33% |
| Sihyeon Jang | 1 | 0.01% | 1 | 0.33% |
| Josh Poimboeuf | 1 | 0.01% | 1 | 0.33% |
| Irina Tirdea | 1 | 0.01% | 1 | 0.33% |
| Total | 7721 | 301 |
/* * 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 <mingo@redhat.com> * 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> * * Improvements and fixes by: * * Arjan van de Ven <arjan@linux.intel.com> * Yanmin Zhang <yanmin.zhang@intel.com> * Wu Fengguang <fengguang.wu@intel.com> * Mike Galbraith <efault@gmx.de> * Paul Mackerras <paulus@samba.org> * * Released under the GPL v2. (and only v2, not any later version) */ #include "builtin.h" #include "perf.h" #include "util/annotate.h" #include "util/config.h" #include "util/color.h" #include "util/drv_configs.h" #include "util/evlist.h" #include "util/evsel.h" #include "util/event.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 <linux/rbtree.h> #include <subcmd/parse-options.h> #include "util/parse-events.h" #include "util/cpumap.h" #include "util/xyarray.h" #include "util/sort.h" #include "util/term.h" #include "util/intlist.h" #include "util/parse-branch-options.h" #include "arch/common.h" #include "util/debug.h" #include "util/ordered-events.h" #include <assert.h> #include <elf.h> #include <fcntl.h> #include <stdio.h> #include <termios.h> #include <unistd.h> #include <inttypes.h> #include <errno.h> #include <time.h> #include <sched.h> #include <signal.h> #include <sys/syscall.h> #include <sys/ioctl.h> #include <poll.h> #include <sys/prctl.h> #include <sys/wait.h> #include <sys/uio.h> #include <sys/utsname.h> #include <sys/mman.h> #include <linux/stringify.h> #include <linux/time64.h> #include <linux/types.h> #include "sane_ctype.h" static volatile int done; static volatile int resize; #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 winch_sig(int sig __maybe_unused) { resize = 1; } static void perf_top__resize(struct perf_top *top) { 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 perf_evsel *evsel = hists_to_evsel(he->hists); 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); pthread_mutex_lock(¬es->lock); if (!symbol__hists(sym, top->evlist->nr_entries)) { 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, evsel, 0, &top->annotation_opts, NULL); if (err == 0) { top->sym_filter_entry = he; } else { char msg[BUFSIZ]; symbol__strerror_disassemble(sym, map, err, msg, sizeof(msg)); pr_err("Couldn't annotate %s: %s\n", sym->name, msg); } 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, struct perf_sample *sample, struct perf_evsel *evsel, u64 ip) { struct annotation *notes; struct symbol *sym = he->ms.sym; int err = 0; if (sym == NULL || (use_browser == 0 && (top->sym_filter_entry == NULL || top->sym_filter_entry->ms.sym != sym))) return; notes = symbol__annotation(sym); if (pthread_mutex_trylock(¬es->lock)) return; err = hist_entry__inc_addr_samples(he, sample, evsel, ip); pthread_mutex_unlock(¬es->lock); if (unlikely(err)) { /* * This function is now called with he->hists->lock held. * Release it before going to sleep. */ pthread_mutex_unlock(&he->hists->lock); if (err == -ERANGE && !he->ms.map->erange_warned) ui__warn_map_erange(he->ms.map, sym, ip); else if (err == -ENOMEM) { pr_err("Not enough memory for annotating '%s' symbol!\n", sym->name); sleep(1); } pthread_mutex_lock(&he->hists->lock); } } static void perf_top__show_details(struct perf_top *top) { struct hist_entry *he = top->sym_filter_entry; struct perf_evsel *evsel = hists_to_evsel(he->hists); struct annotation *notes; struct symbol *symbol; int more; if (!he) return; symbol = he->ms.sym; notes = symbol__annotation(symbol); pthread_mutex_lock(¬es->lock); symbol__calc_percent(symbol, evsel); 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->annotation_opts.min_pcnt); more = symbol__annotate_printf(symbol, he->ms.map, top->sym_evsel, &top->annotation_opts); if (top->evlist->enabled) { 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 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; struct perf_evsel *evsel = top->sym_evsel; struct hists *hists = evsel__hists(evsel); puts(CONSOLE_CLEAR); perf_top__header_snprintf(top, bf, sizeof(bf)); printf("%s\n", bf); printf("%-*.*s\n", win_width, win_width, graph_dotted_line); if (!top->record_opts.overwrite && (hists->stats.nr_lost_warned != hists->stats.nr_events[PERF_RECORD_LOST])) { hists->stats.nr_lost_warned = hists->stats.nr_events[PERF_RECORD_LOST]; color_fprintf(stdout, PERF_COLOR_RED, "WARNING: LOST %d chunks, Check IO/CPU overload", hists->stats.nr_lost_warned); ++printed; } if (top->sym_filter_entry) { perf_top__show_details(top); return; } if (top->evlist->enabled) { if (top->zero) { hists__delete_entries(hists); } else { hists__decay_entries(hists, top->hide_user_symbols, top->hide_kernel_symbols); } } hists__collapse_resort(hists, NULL); perf_evsel__output_resort(evsel, NULL); hists__output_recalc_col_len(hists, top->print_entries - printed); putchar('\n'); hists__fprintf(hists, false, top->print_entries - printed, win_width, top->min_percent, stdout, !symbol_conf.use_callchain); } 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 hists *hists = evsel__hists(top->sym_evsel); 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(&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->annotation_opts.min_pcnt); 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. \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 save; perf_top__print_mapped_keys(top); fprintf(stdout, "\nEnter selection, or unmapped key to continue: "); fflush(stdout); set_term_quiet_input(&save); 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) { perf_top__resize(top); signal(SIGWINCH, winch_sig); } 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:"); evlist__for_each_entry(top->evlist, top->sym_evsel) 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; } evlist__for_each_entry(top->evlist, top->sym_evsel) 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->annotation_opts.min_pcnt, "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; struct perf_evsel *evsel = t->sym_evsel; struct hists *hists; if (t->evlist->selected != NULL) t->sym_evsel = t->evlist->selected; hists = evsel__hists(evsel); if (t->evlist->enabled) { if (t->zero) { hists__delete_entries(hists); } else { hists__decay_entries(hists, t->hide_user_symbols, t->hide_kernel_symbols); } } hists__collapse_resort(hists, NULL); perf_evsel__output_resort(evsel, NULL); if (t->lost || t->drop) pr_warning("Too slow to read ring buffer (change period (-c/-F) or limit CPUs (-C)\n"); } static void stop_top(void) { session_done = 1; done = 1; } 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, }; /* In order to read symbols from other namespaces perf to needs to call * setns(2). This isn't permitted if the struct_fs has multiple users. * unshare(2) the fs so that we may continue to setns into namespaces * that we're observing. */ unshare(CLONE_FS); perf_top__sort_new_samples(top); /* * Initialize the uid_filter_str, in the future the TUI will allow * Zooming in/out UIDs. For now just use whatever the user passed * via --uid. */ evlist__for_each_entry(top->evlist, pos) { struct hists *hists = evsel__hists(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, !top->record_opts.overwrite, &top->annotation_opts); stop_top(); return NULL; } static void display_sig(int sig __maybe_unused) { stop_top(); } static void display_setup_sig(void) { signal(SIGSEGV, sighandler_dump_stack); signal(SIGFPE, sighandler_dump_stack); signal(SIGINT, display_sig); signal(SIGQUIT, display_sig); signal(SIGTERM, display_sig); } static void *display_thread(void *arg) { struct pollfd stdin_poll = { .fd = 0, .events = POLLIN }; struct termios save; struct perf_top *top = arg; int delay_msecs, c; /* In order to read symbols from other namespaces perf to needs to call * setns(2). This isn't permitted if the struct_fs has multiple users. * unshare(2) the fs so that we may continue to setns into namespaces * that we're observing. */ unshare(CLONE_FS); display_setup_sig(); pthread__unblock_sigwinch(); repeat: delay_msecs = top->delay_secs * MSEC_PER_SEC; set_term_quiet_input(&save); /* 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; __fallthrough; default: c = getc(stdin); tcsetattr(0, TCSAFLUSH, &save); if (perf_top__handle_keypress(top, c)) goto repeat; stop_top(); } } tcsetattr(0, TCSAFLUSH, &save); return NULL; } static int hist_iter__top_callback(struct hist_entry_iter *iter, struct addr_location *al, bool single, void *arg) { struct perf_top *top = arg; struct hist_entry *he = iter->he; struct perf_evsel *evsel = iter->evsel; if (perf_hpp_list.sym && single) perf_top__record_precise_ip(top, he, iter->sample, evsel, al->addr); hist__account_cycles(iter->sample->branch_stack, al, iter->sample, !(top->record_opts.branch_stack & PERF_SAMPLE_BRANCH_ANY)); 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 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->evlist->stats.nr_unprocessable_samples++); return; } if (event->header.misc & PERF_RECORD_MISC_EXACT_IP) top->exact_samples++; if (machine__resolve(machine, &al, sample) < 0) return; if (!machine->kptr_restrict_warned && symbol_conf.kptr_restrict && al.cpumode == PERF_RECORD_MISC_KERNEL) { if (!perf_evlist__exclude_kernel(top->session->evlist)) { 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", al.map && map__has_symbols(al.map) ? " modules" : ""); if (use_browser <= 0) sleep(5); } machine->kptr_restrict_warned = true; } if (al.sym == NULL && al.map != 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 (!machine->kptr_restrict_warned && !top->vmlinux_warned && __map__is_kernel(al.map) && map__has_symbols(al.map)) { if (symbol_conf.vmlinux_name) { char serr[256]; dso__strerror_load(al.map->dso, serr, sizeof(serr)); ui__warning("The %s file can't be used: %s\n%s", symbol_conf.vmlinux_name, serr, 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->idle) { struct hists *hists = evsel__hists(evsel); struct hist_entry_iter iter = { .evsel = evsel, .sample = sample, .add_entry_cb = hist_iter__top_callback, }; if (symbol_conf.cumulate_callchain) iter.ops = &hist_iter_cumulative; else iter.ops = &hist_iter_normal; pthread_mutex_lock(&hists->lock); err = hist_entry_iter__add(&iter, &al, top->max_stack, top); if (err < 0) pr_err("Problem incrementing symbol period, skipping event\n"); pthread_mutex_unlock(&hists->lock); } addr_location__put(&al); } static void perf_top__process_lost(struct perf_top *top, union perf_event *event, struct perf_evsel *evsel) { struct hists *hists = evsel__hists(evsel); top->lost += event->lost.lost; top->lost_total += event->lost.lost; hists->stats.total_lost += event->lost.lost; } static void perf_top__process_lost_samples(struct perf_top *top, union perf_event *event, struct perf_evsel *evsel) { struct hists *hists = evsel__hists(evsel); top->lost += event->lost_samples.lost; top->lost_total += event->lost_samples.lost; hists->stats.total_lost_samples += event->lost_samples.lost; } static u64 last_timestamp; static void perf_top__mmap_read_idx(struct perf_top *top, int idx) { struct record_opts *opts = &top->record_opts; struct perf_evlist *evlist = top->evlist; struct perf_mmap *md; union perf_event *event; md = opts->overwrite ? &evlist->overwrite_mmap[idx] : &evlist->mmap[idx]; if (perf_mmap__read_init(md) < 0) return; while ((event = perf_mmap__read_event(md)) != NULL) { int ret; ret = perf_evlist__parse_sample_timestamp(evlist, event, &last_timestamp); if (ret && ret != -1) break; ret = ordered_events__queue(top->qe.in, event, last_timestamp, 0); if (ret) break; perf_mmap__consume(md); if (top->qe.rotate) { pthread_mutex_lock(&top->qe.mutex); top->qe.rotate = false; pthread_cond_signal(&top->qe.cond); pthread_mutex_unlock(&top->qe.mutex); } } perf_mmap__read_done(md); } static void perf_top__mmap_read(struct perf_top *top) { bool overwrite = top->record_opts.overwrite; struct perf_evlist *evlist = top->evlist; int i; if (overwrite) perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_DATA_PENDING); for (i = 0; i < top->evlist->nr_mmaps; i++) perf_top__mmap_read_idx(top, i); if (overwrite) { perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_EMPTY); perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING); } } /* * Check per-event overwrite term. * perf top should support consistent term for all events. * - All events don't have per-event term * E.g. "cpu/cpu-cycles/,cpu/instructions/" * Nothing change, return 0. * - All events have same per-event term * E.g. "cpu/cpu-cycles,no-overwrite/,cpu/instructions,no-overwrite/ * Using the per-event setting to replace the opts->overwrite if * they are different, then return 0. * - Events have different per-event term * E.g. "cpu/cpu-cycles,overwrite/,cpu/instructions,no-overwrite/" * Return -1 * - Some of the event set per-event term, but some not. * E.g. "cpu/cpu-cycles/,cpu/instructions,no-overwrite/" * Return -1 */ static int perf_top__overwrite_check(struct perf_top *top) { struct record_opts *opts = &top->record_opts; struct perf_evlist *evlist = top->evlist; struct perf_evsel_config_term *term; struct list_head *config_terms; struct perf_evsel *evsel; int set, overwrite = -1; evlist__for_each_entry(evlist, evsel) { set = -1; config_terms = &evsel->config_terms; list_for_each_entry(term, config_terms, list) { if (term->type == PERF_EVSEL__CONFIG_TERM_OVERWRITE) set = term->val.overwrite ? 1 : 0; } /* no term for current and previous event (likely) */ if ((overwrite < 0) && (set < 0)) continue; /* has term for both current and previous event, compare */ if ((overwrite >= 0) && (set >= 0) && (overwrite != set)) return -1; /* no term for current event but has term for previous one */ if ((overwrite >= 0) && (set < 0)) return -1; /* has term for current event */ if ((overwrite < 0) && (set >= 0)) { /* if it's first event, set overwrite */ if (evsel == perf_evlist__first(evlist)) overwrite = set; else return -1; } } if ((overwrite >= 0) && (opts->overwrite != overwrite)) opts->overwrite = overwrite; return 0; } static int perf_top_overwrite_fallback(struct perf_top *top, struct perf_evsel *evsel) { struct record_opts *opts = &top->record_opts; struct perf_evlist *evlist = top->evlist; struct perf_evsel *counter; if (!opts->overwrite) return 0; /* only fall back when first event fails */ if (evsel != perf_evlist__first(evlist)) return 0; evlist__for_each_entry(evlist, counter) counter->attr.write_backward = false; opts->overwrite = false; pr_debug2("fall back to non-overwrite mode\n"); return 1; } static int perf_top__start_counters(struct perf_top *top) { char msg[BUFSIZ]; struct perf_evsel *counter; struct perf_evlist *evlist = top->evlist; struct record_opts *opts = &top->record_opts; if (perf_top__overwrite_check(top)) { ui__error("perf top only support consistent per-event " "overwrite setting for all events\n"); goto out_err; } perf_evlist__config(evlist, opts, &callchain_param); evlist__for_each_entry(evlist, counter) { try_again: if (perf_evsel__open(counter, top->evlist->cpus, top->evlist->threads) < 0) { /* * Specially handle overwrite fall back. * Because perf top is the only tool which has * overwrite mode by default, support * both overwrite and non-overwrite mode, and * require consistent mode for all events. * * May move it to generic code with more tools * have similar attribute. */ if (perf_missing_features.write_backward && perf_top_overwrite_fallback(top, counter)) goto try_again; if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) { if (verbose > 0) 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) < 0) { ui__error("Failed to mmap with %d (%s)\n", errno, str_error_r(errno, msg, sizeof(msg))); goto out_err; } return 0; out_err: return -1; } static int callchain_param__setup_sample_type(struct callchain_param *callchain) { if (callchain->mode != CHAIN_NONE) { if (callchain_register_param(callchain) < 0) { ui__error("Can't register callchain params.\n"); return -EINVAL; } } return 0; } static struct ordered_events *rotate_queues(struct perf_top *top) { struct ordered_events *in = top->qe.in; if (top->qe.in == &top->qe.data[1]) top->qe.in = &top->qe.data[0]; else top->qe.in = &top->qe.data[1]; return in; } static void *process_thread(void *arg) { struct perf_top *top = arg; while (!done) { struct ordered_events *out, *in = top->qe.in; if (!in->nr_events) { usleep(100); continue; } out = rotate_queues(top); pthread_mutex_lock(&top->qe.mutex); top->qe.rotate = true; pthread_cond_wait(&top->qe.cond, &top->qe.mutex); pthread_mutex_unlock(&top->qe.mutex); if (ordered_events__flush(out, OE_FLUSH__TOP)) pr_err("failed to process events\n"); } return NULL; } /* * Allow only 'top->delay_secs' seconds behind samples. */ static int should_drop(struct ordered_event *qevent, struct perf_top *top) { union perf_event *event = qevent->event; u64 delay_timestamp; if (event->header.type != PERF_RECORD_SAMPLE) return false; delay_timestamp = qevent->timestamp + top->delay_secs * NSEC_PER_SEC; return delay_timestamp < last_timestamp; } static int deliver_event(struct ordered_events *qe, struct ordered_event *qevent) { struct perf_top *top = qe->data; struct perf_evlist *evlist = top->evlist; struct perf_session *session = top->session; union perf_event *event = qevent->event; struct perf_sample sample; struct perf_evsel *evsel; struct machine *machine; int ret = -1; if (should_drop(qevent, top)) { top->drop++; top->drop_total++; return 0; } ret = perf_evlist__parse_sample(evlist, event, &sample); if (ret) { pr_err("Can't parse sample, err = %d\n", ret); goto next_event; } evsel = perf_evlist__id2evsel(session->evlist, sample.id); assert(evsel != NULL); if (event->header.type == PERF_RECORD_SAMPLE) ++top->samples; switch (sample.cpumode) { case PERF_RECORD_MISC_USER: ++top->us_samples; if (top->hide_user_symbols) goto next_event; machine = &session->machines.host; break; case PERF_RECORD_MISC_KERNEL: ++top->kernel_samples; if (top->hide_kernel_symbols) goto next_event; 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. */ goto next_event; default: if (event->header.type == PERF_RECORD_SAMPLE) goto next_event; machine = &session->machines.host; break; } if (event->header.type == PERF_RECORD_SAMPLE) { perf_event__process_sample(&top->tool, event, evsel, &sample, machine); } else if (event->header.type == PERF_RECORD_LOST) { perf_top__process_lost(top, event, evsel); } else if (event->header.type == PERF_RECORD_LOST_SAMPLES) { perf_top__process_lost_samples(top, event, evsel); } else if (event->header.type < PERF_RECORD_MAX) { hists__inc_nr_events(evsel__hists(evsel), event->header.type); machine__process_event(machine, event, &sample); } else ++session->evlist->stats.nr_unknown_events; ret = 0; next_event: return ret; } static void init_process_thread(struct perf_top *top) { ordered_events__init(&top->qe.data[0], deliver_event, top); ordered_events__init(&top->qe.data[1], deliver_event, top); ordered_events__set_copy_on_queue(&top->qe.data[0], true); ordered_events__set_copy_on_queue(&top->qe.data[1], true); top->qe.in = &top->qe.data[0]; pthread_mutex_init(&top->qe.mutex, NULL); pthread_cond_init(&top->qe.cond, NULL); } static int __cmd_top(struct perf_top *top) { char msg[512]; struct perf_evsel *pos; struct perf_evsel_config_term *err_term; struct perf_evlist *evlist = top->evlist; struct record_opts *opts = &top->record_opts; pthread_t thread, thread_process; int ret; top->session = perf_session__new(NULL, false, NULL); if (top->session == NULL) return -1; if (!top->annotation_opts.objdump_path) { ret = perf_env__lookup_objdump(&top->session->header.env, &top->annotation_opts.objdump_path); if (ret) goto out_delete; } ret = callchain_param__setup_sample_type(&callchain_param); if (ret) goto out_delete; if (perf_session__register_idle_thread(top->session) < 0) goto out_delete; if (top->nr_threads_synthesize > 1) perf_set_multithreaded(); init_process_thread(top); machine__synthesize_threads(&top->session->machines.host, &opts->target, top->evlist->threads, false, top->nr_threads_synthesize); if (top->nr_threads_synthesize > 1) perf_set_singlethreaded(); if (perf_hpp_list.socket) { ret = perf_env__read_cpu_topology_map(&perf_env); if (ret < 0) goto out_err_cpu_topo; } ret = perf_top__start_counters(top); if (ret) goto out_delete; ret = perf_evlist__apply_drv_configs(evlist, &pos, &err_term); if (ret) { pr_err("failed to set config \"%s\" on event %s with %d (%s)\n", err_term->val.drv_cfg, perf_evsel__name(pos), errno, str_error_r(errno, msg, sizeof(msg))); 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 (!target__none(&opts->target)) perf_evlist__enable(top->evlist); ret = -1; if (pthread_create(&thread_process, NULL, process_thread, top)) { ui__error("Could not create process thread.\n"); goto out_delete; } if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui : display_thread), top)) { ui__error("Could not create display thread.\n"); goto out_join_thread; } 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_join; } } /* Wait for a minimal set of events before starting the snapshot */ perf_evlist__poll(top->evlist, 100); perf_top__mmap_read(top); while (!done) { u64 hits = top->samples; perf_top__mmap_read(top); if (opts->overwrite || (hits == top->samples)) ret = perf_evlist__poll(top->evlist, 100); if (resize) { perf_top__resize(top); resize = 0; } } ret = 0; out_join: pthread_join(thread, NULL); out_join_thread: pthread_cond_signal(&top->qe.cond); pthread_join(thread_process, NULL); out_delete: perf_session__delete(top->session); top->session = NULL; return ret; out_err_cpu_topo: { char errbuf[BUFSIZ]; const char *err = str_error_r(-ret, errbuf, sizeof(errbuf)); ui__error("Could not read the CPU topology map: %s\n", err); goto out_delete; } } static int callchain_opt(const struct option *opt, const char *arg, int unset) { symbol_conf.use_callchain = true; return record_callchain_opt(opt, arg, unset); } static int parse_callchain_opt(const struct option *opt, const char *arg, int unset) { struct callchain_param *callchain = opt->value; callchain->enabled = !unset; callchain->record_mode = CALLCHAIN_FP; /* * --no-call-graph */ if (unset) { symbol_conf.use_callchain = false; callchain->record_mode = CALLCHAIN_NONE; return 0; } return parse_callchain_top_opt(arg); } static int perf_top_config(const char *var, const char *value, void *cb __maybe_unused) { if (!strcmp(var, "top.call-graph")) { var = "call-graph.record-mode"; return perf_default_config(var, value, cb); } if (!strcmp(var, "top.children")) { symbol_conf.cumulate_callchain = perf_config_bool(var, value); return 0; } return 0; } 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; } const char top_callchain_help[] = CALLCHAIN_RECORD_HELP CALLCHAIN_REPORT_HELP "\n\t\t\t\tDefault: fp,graph,0.5,caller,function"; int cmd_top(int argc, const char **argv) { 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, }, /* * FIXME: This will lose PERF_RECORD_MMAP and other metadata * when we pause, fix that and reenable. Probably using a * separate evlist with a dummy event, i.e. a non-overwrite * ring buffer just for metadata events, while PERF_RECORD_SAMPLE * stays in overwrite mode. -acme * */ .overwrite = 0, .sample_time = true, }, .max_stack = sysctl__max_stack(), .annotation_opts = annotation__default_options, .nr_threads_synthesize = UINT_MAX, }; struct record_opts *opts = &top.record_opts; struct 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(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux, "don't load vmlinux even if found"), OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name, "file", "kallsyms pathname"), OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols, "hide kernel symbols"), OPT_CALLBACK('m', "mmap-pages", &opts->mmap_pages, "pages", "number of mmap data pages", perf_evlist__parse_mmap_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(0, "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_CALLBACK('F', "freq", &top.record_opts, "freq or 'max'", "profile at this frequency", record__parse_freq), 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, cpu, srcline, ..." " Please refer the man page for the complete list."), OPT_STRING(0, "fields", &field_order, "key[,keys...]", "output field(s): overhead, period, sample plus all of sort keys"), OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples, "Show a column with the number of samples"), OPT_CALLBACK_NOOPT('g', NULL, &callchain_param, NULL, "enables call-graph recording and display", &callchain_opt), OPT_CALLBACK(0, "call-graph", &callchain_param, "record_mode[,record_size],print_type,threshold[,print_limit],order,sort_key[,branch]", top_callchain_help, &parse_callchain_opt), OPT_BOOLEAN(0, "children", &symbol_conf.cumulate_callchain, "Accumulate callchains of children and show total overhead as well"), OPT_INTEGER(0, "max-stack", &top.max_stack, "Set the maximum stack depth when parsing the callchain. " "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)), 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", &top.annotation_opts.annotate_src, "Interleave source code with assembly code (default)"), OPT_BOOLEAN(0, "asm-raw", &top.annotation_opts.show_asm_raw, "Display raw encoding of assembly instructions (default)"), OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel, "Enable kernel symbol demangling"), OPT_STRING(0, "objdump", &top.annotation_opts.objdump_path, "path", "objdump binary to use for disassembly and annotations"), OPT_STRING('M', "disassembler-style", &top.annotation_opts.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_CALLBACK(0, "percentage", NULL, "relative|absolute", "How to display percentage of filtered entries", parse_filter_percentage), OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str, "width[,width...]", "don't try to adjust column width, use these fixed values"), OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout, "per thread proc mmap processing timeout in ms"), OPT_CALLBACK_NOOPT('b', "branch-any", &opts->branch_stack, "branch any", "sample any taken branches", parse_branch_stack), OPT_CALLBACK('j', "branch-filter", &opts->branch_stack, "branch filter mask", "branch stack filter modes", parse_branch_stack), OPT_BOOLEAN(0, "raw-trace", &symbol_conf.raw_trace, "Show raw trace event output (do not use print fmt or plugins)"), OPT_BOOLEAN(0, "hierarchy", &symbol_conf.report_hierarchy, "Show entries in a hierarchy"), OPT_BOOLEAN(0, "overwrite", &top.record_opts.overwrite, "Use a backward ring buffer, default: no"), OPT_BOOLEAN(0, "force", &symbol_conf.force, "don't complain, do it"), OPT_UINTEGER(0, "num-thread-synthesize", &top.nr_threads_synthesize, "number of thread to run event synthesize"), OPT_END() }; const char * const top_usage[] = { "perf top [<options>]", NULL }; int status = hists__init(); if (status < 0) return status; top.annotation_opts.min_pcnt = 5; top.annotation_opts.context = 4; top.evlist = perf_evlist__new(); if (top.evlist == NULL) return -ENOMEM; status = perf_config(perf_top_config, &top); if (status) return status; argc = parse_options(argc, argv, options, top_usage, 0); if (argc) usage_with_options(top_usage, options); if (!top.evlist->nr_entries && perf_evlist__add_default(top.evlist) < 0) { pr_err("Not enough memory for event selector list\n"); goto out_delete_evlist; } if (symbol_conf.report_hierarchy) { /* disable incompatible options */ symbol_conf.event_group = false; symbol_conf.cumulate_callchain = false; if (field_order) { pr_err("Error: --hierarchy and --fields options cannot be used together\n"); parse_options_usage(top_usage, options, "fields", 0); parse_options_usage(NULL, options, "hierarchy", 0); goto out_delete_evlist; } } if (opts->branch_stack && callchain_param.enabled) symbol_conf.show_branchflag_count = true; sort__mode = SORT_MODE__TOP; /* display thread wants entries to be collapsed in a different tree */ perf_hpp_list.need_collapse = 1; if (top.use_stdio) use_browser = 0; else if (top.use_tui) use_browser = 1; setup_browser(false); if (setup_sorting(top.evlist) < 0) { if (sort_order) parse_options_usage(top_usage, options, "s", 1); if (field_order) parse_options_usage(sort_order ? NULL : top_usage, options, "fields", 0); goto out_delete_evlist; } status = target__validate(target); if (status) { target__strerror(target, status, errbuf, BUFSIZ); ui__warning("%s\n", errbuf); } status = target__parse_uid(target); if (status) { int saved_errno = errno; target__strerror(target, status, errbuf, BUFSIZ); ui__error("%s\n", errbuf); status = -saved_errno; goto out_delete_evlist; } if (target__none(target)) target->system_wide = true; if (perf_evlist__create_maps(top.evlist, target) < 0) { ui__error("Couldn't create thread/CPU maps: %s\n", errno == ENOENT ? "No such process" : str_error_r(errno, errbuf, sizeof(errbuf))); goto out_delete_evlist; } if (top.delay_secs < 1) top.delay_secs = 1; if (record_opts__config(opts)) { status = -EINVAL; goto out_delete_evlist; } top.sym_evsel = perf_evlist__first(top.evlist); if (!callchain_param.enabled) { symbol_conf.cumulate_callchain = false; perf_hpp__cancel_cumulate(); } if (symbol_conf.cumulate_callchain && !callchain_param.order_set) callchain_param.order = ORDER_CALLER; status = symbol__annotation_init(); if (status < 0) goto out_delete_evlist; annotation_config__init(); symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL); if (symbol__init(NULL) < 0) return -1; sort__setup_elide(stdout); get_term_dimensions(&top.winsize); if (top.print_entries == 0) { perf_top__update_print_entries(&top); signal(SIGWINCH, winch_sig); } status = __cmd_top(&top); out_delete_evlist: perf_evlist__delete(top.evlist); return status; }
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