| /* |
| * 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/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 <linux/rbtree.h> |
| #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 <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 <sys/syscall.h> |
| #include <sys/ioctl.h> |
| #include <sys/poll.h> |
| #include <sys/prctl.h> |
| #include <sys/wait.h> |
| #include <sys/uio.h> |
| #include <sys/utsname.h> |
| #include <sys/mman.h> |
| |
| #include <linux/unistd.h> |
| #include <linux/types.h> |
| |
| 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, NULL, NULL, |
| sample->period, sample->weight, |
| sample->transaction); |
| 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, NULL); |
| 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, NULL); |
| 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, |
| top->max_stack); |
| 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); |
| goto next_event; |
| } |
| |
| 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) |
| 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. |
| */ |
| /* Fall thru */ |
| default: |
| goto next_event; |
| } |
| |
| |
| 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, &sample); |
| } else |
| ++session->stats.nr_unknown_events; |
| next_event: |
| perf_evlist__mmap_consume(top->evlist, idx); |
| } |
| } |
| |
| 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; |
| |
| top->session = perf_session__new(NULL, 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 |
| 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) |
| { |
| 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 = -1; |
| 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, |
| }, |
| }, |
| .max_stack = PERF_MAX_STACK_DEPTH, |
| .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(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux, |
| "don't load vmlinux even if found"), |
| 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('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, transaction"), |
| OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples, |
| "Show a column with the number of samples"), |
| OPT_CALLBACK_NOOPT('G', NULL, &top.record_opts, |
| NULL, "enables call-graph recording", |
| &callchain_opt), |
| OPT_CALLBACK(0, "call-graph", &top.record_opts, |
| "mode[,dump_size]", record_callchain_help, |
| &parse_callchain_opt), |
| OPT_INTEGER(0, "max-stack", &top.max_stack, |
| "Set the maximum stack depth when parsing the callchain. " |
| "Default: " __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", &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 [<options>]", |
| 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) { |
| parse_options_usage(top_usage, options, "s", 1); |
| goto out_delete_evlist; |
| } |
| |
| /* 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; |
| } |