1 files changed, 187 insertions, 228 deletions

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 8cf8e66ba594..02f985f3a396 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -39,7 +39,7 @@
 #include <dlfcn.h>
 #include <linux/bitmap.h>
 
-struct perf_report {
+struct report {
         struct perf_tool        tool;
         struct perf_session     *session;
         bool                    force, use_tui, use_gtk, use_stdio;
@@ -49,6 +49,8 @@ struct perf_report {
         bool                    show_threads;
         bool                    inverted_callchain;
         bool                    mem_mode;
+        bool                    header;
+        bool                    header_only;
         int                     max_stack;
         struct perf_read_values show_threads_values;
         const char              *pretty_printing_style;
@@ -58,14 +60,14 @@ struct perf_report {
         DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
 };
 
-static int perf_report_config(const char *var, const char *value, void *cb)
+static int report__config(const char *var, const char *value, void *cb)
 {
         if (!strcmp(var, "report.group")) {
                 symbol_conf.event_group = perf_config_bool(var, value);
                 return 0;
         }
         if (!strcmp(var, "report.percent-limit")) {
-                struct perf_report *rep = cb;
+                struct report *rep = cb;
                 rep->min_percent = strtof(value, NULL);
                 return 0;
         }
@@ -73,31 +75,22 @@ static int perf_report_config(const char *var, const char *value, void *cb)
         return perf_default_config(var, value, cb);
 }
 
-static int perf_report__add_mem_hist_entry(struct perf_tool *tool,
-                                           struct addr_location *al,
-                                           struct perf_sample *sample,
-                                           struct perf_evsel *evsel,
-                                           struct machine *machine,
-                                           union perf_event *event)
+static int report__add_mem_hist_entry(struct perf_tool *tool, struct addr_location *al,
+                                      struct perf_sample *sample, struct perf_evsel *evsel,
+                                      union perf_event *event)
 {
-        struct perf_report *rep = container_of(tool, struct perf_report, tool);
+        struct report *rep = container_of(tool, struct report, tool);
         struct symbol *parent = NULL;
         u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
-        int err = 0;
         struct hist_entry *he;
         struct mem_info *mi, *mx;
         uint64_t cost;
+        int err = sample__resolve_callchain(sample, &parent, evsel, al, rep->max_stack);
 
-        if ((sort__has_parent || symbol_conf.use_callchain) &&
-            sample->callchain) {
-                err = machine__resolve_callchain(machine, evsel, al->thread,
-                                                 sample, &parent, al,
-                                                 rep->max_stack);
-                if (err)
-                        return err;
-        }
+        if (err)
+                return err;
 
-        mi = machine__resolve_mem(machine, al->thread, sample, cpumode);
+        mi = machine__resolve_mem(al->machine, al->thread, sample, cpumode);
         if (!mi)
                 return -ENOMEM;
 
@@ -120,77 +113,38 @@ static int perf_report__add_mem_hist_entry(struct perf_tool *tool,
         if (!he)
                 return -ENOMEM;
 
-        /*
-         * In the TUI browser, we are doing integrated annotation,
-         * so we don't allocate the extra space needed because the stdio
-         * code will not use it.
-         */
-        if (sort__has_sym && he->ms.sym && use_browser > 0) {
-                struct annotation *notes = symbol__annotation(he->ms.sym);
-
-                assert(evsel != NULL);
-
-                if (notes->src == NULL && symbol__alloc_hist(he->ms.sym) < 0)
-                        goto out;
-
+        if (ui__has_annotation()) {
                 err = hist_entry__inc_addr_samples(he, evsel->idx, al->addr);
                 if (err)
                         goto out;
-        }
-
-        if (sort__has_sym && he->mem_info->daddr.sym && use_browser > 0) {
-                struct annotation *notes;
 
                 mx = he->mem_info;
-
-                notes = symbol__annotation(mx->daddr.sym);
-                if (notes->src == NULL && symbol__alloc_hist(mx->daddr.sym) < 0)
-                        goto out;
-
-                err = symbol__inc_addr_samples(mx->daddr.sym,
-                                               mx->daddr.map,
-                                               evsel->idx,
-                                               mx->daddr.al_addr);
+                err = addr_map_symbol__inc_samples(&mx->daddr, evsel->idx);
                 if (err)
                         goto out;
         }
 
         evsel->hists.stats.total_period += cost;
         hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);
-        err = 0;
-
-        if (symbol_conf.use_callchain) {
-                err = callchain_append(he->callchain,
-                                       &callchain_cursor,
-                                       sample->period);
-        }
+        err = hist_entry__append_callchain(he, sample);
 out:
         return err;
 }
 
-static int perf_report__add_branch_hist_entry(struct perf_tool *tool,
-                                        struct addr_location *al,
-                                        struct perf_sample *sample,
-                                        struct perf_evsel *evsel,
-                                      struct machine *machine)
+static int report__add_branch_hist_entry(struct perf_tool *tool, struct addr_location *al,
+                                         struct perf_sample *sample, struct perf_evsel *evsel)
 {
-        struct perf_report *rep = container_of(tool, struct perf_report, tool);
+        struct report *rep = container_of(tool, struct report, tool);
         struct symbol *parent = NULL;
-        int err = 0;
         unsigned i;
         struct hist_entry *he;
         struct branch_info *bi, *bx;
+        int err = sample__resolve_callchain(sample, &parent, evsel, al, rep->max_stack);
 
-        if ((sort__has_parent || symbol_conf.use_callchain)
-            && sample->callchain) {
-                err = machine__resolve_callchain(machine, evsel, al->thread,
-                                                 sample, &parent, al,
-                                                 rep->max_stack);
-                if (err)
-                        return err;
-        }
+        if (err)
+                return err;
 
-        bi = machine__resolve_bstack(machine, al->thread,
+        bi = machine__resolve_bstack(al->machine, al->thread,
                                      sample->branch_stack);
         if (!bi)
                 return -ENOMEM;
@@ -212,35 +166,19 @@ static int perf_report__add_branch_hist_entry(struct perf_tool *tool,
                 he = __hists__add_entry(&evsel->hists, al, parent, &bi[i], NULL,
                                         1, 1, 0);
                 if (he) {
-                        struct annotation *notes;
-                        bx = he->branch_info;
-                        if (bx->from.sym && use_browser == 1 && sort__has_sym) {
-                                notes = symbol__annotation(bx->from.sym);
-                                if (!notes->src
-                                    && symbol__alloc_hist(bx->from.sym) < 0)
-                                        goto out;
-
-                                err = symbol__inc_addr_samples(bx->from.sym,
-                                                               bx->from.map,
-                                                               evsel->idx,
-                                                               bx->from.al_addr);
+                        if (ui__has_annotation()) {
+                                bx = he->branch_info;
+                                err = addr_map_symbol__inc_samples(&bx->from,
+                                                                   evsel->idx);
                                 if (err)
                                         goto out;
-                        }
 
-                        if (bx->to.sym && use_browser == 1 && sort__has_sym) {
-                                notes = symbol__annotation(bx->to.sym);
-                                if (!notes->src
-                                    && symbol__alloc_hist(bx->to.sym) < 0)
-                                        goto out;
-
-                                err = symbol__inc_addr_samples(bx->to.sym,
-                                                               bx->to.map,
-                                                               evsel->idx,
-                                                               bx->to.al_addr);
+                                err = addr_map_symbol__inc_samples(&bx->to,
+                                                                   evsel->idx);
                                 if (err)
                                         goto out;
                         }
+
                         evsel->hists.stats.total_period += 1;
                         hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);
                 } else
@@ -252,24 +190,16 @@ out:
         return err;
 }
 
-static int perf_evsel__add_hist_entry(struct perf_tool *tool,
-                                      struct perf_evsel *evsel,
-                                      struct addr_location *al,
-                                      struct perf_sample *sample,
-                                      struct machine *machine)
+static int report__add_hist_entry(struct perf_tool *tool, struct perf_evsel *evsel,
+                                  struct addr_location *al, struct perf_sample *sample)
 {
-        struct perf_report *rep = container_of(tool, struct perf_report, tool);
+        struct report *rep = container_of(tool, struct report, tool);
         struct symbol *parent = NULL;
-        int err = 0;
         struct hist_entry *he;
+        int err = sample__resolve_callchain(sample, &parent, evsel, al, rep->max_stack);
 
-        if ((sort__has_parent || symbol_conf.use_callchain) && sample->callchain) {
-                err = machine__resolve_callchain(machine, evsel, al->thread,
-                                                 sample, &parent, al,
-                                                 rep->max_stack);
-                if (err)
-                        return err;
-        }
+        if (err)
+                return err;
 
         he = __hists__add_entry(&evsel->hists, al, parent, NULL, NULL,
                                 sample->period, sample->weight,
@@ -277,29 +207,12 @@ static int perf_evsel__add_hist_entry(struct perf_tool *tool,
         if (he == NULL)
                 return -ENOMEM;
 
-        if (symbol_conf.use_callchain) {
-                err = callchain_append(he->callchain,
-                                       &callchain_cursor,
-                                       sample->period);
-                if (err)
-                        return err;
-        }
-        /*
-         * Only in the TUI browser we are doing integrated annotation,
-         * so we don't allocated the extra space needed because the stdio
-         * code will not use it.
-         */
-        if (he->ms.sym != NULL && use_browser == 1 && sort__has_sym) {
-                struct annotation *notes = symbol__annotation(he->ms.sym);
-
-                assert(evsel != NULL);
-
-                err = -ENOMEM;
-                if (notes->src == NULL && symbol__alloc_hist(he->ms.sym) < 0)
-                        goto out;
+        err = hist_entry__append_callchain(he, sample);
+        if (err)
+                goto out;
 
+        if (ui__has_annotation())
                 err = hist_entry__inc_addr_samples(he, evsel->idx, al->addr);
-        }
 
         evsel->hists.stats.total_period += sample->period;
         hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);
@@ -314,13 +227,13 @@ static int process_sample_event(struct perf_tool *tool,
                                 struct perf_evsel *evsel,
                                 struct machine *machine)
 {
-        struct perf_report *rep = container_of(tool, struct perf_report, tool);
+        struct report *rep = container_of(tool, struct report, tool);
         struct addr_location al;
         int ret;
 
         if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) {
-                fprintf(stderr, "problem processing %d event, skipping it.\n",
-                        event->header.type);
+                pr_debug("problem processing %d event, skipping it.\n",
+                         event->header.type);
                 return -1;
         }
 
@@ -331,21 +244,18 @@ static int process_sample_event(struct perf_tool *tool,
                 return 0;
 
         if (sort__mode == SORT_MODE__BRANCH) {
-                ret = perf_report__add_branch_hist_entry(tool, &al, sample,
-                                                         evsel, machine);
+                ret = report__add_branch_hist_entry(tool, &al, sample, evsel);
                 if (ret < 0)
                         pr_debug("problem adding lbr entry, skipping event\n");
         } else if (rep->mem_mode == 1) {
-                ret = perf_report__add_mem_hist_entry(tool, &al, sample,
-                                                      evsel, machine, event);
+                ret = report__add_mem_hist_entry(tool, &al, sample, evsel, event);
                 if (ret < 0)
                         pr_debug("problem adding mem entry, skipping event\n");
         } else {
                 if (al.map != NULL)
                         al.map->dso->hit = 1;
 
-                ret = perf_evsel__add_hist_entry(tool, evsel, &al, sample,
-                                                 machine);
+                ret = report__add_hist_entry(tool, evsel, &al, sample);
                 if (ret < 0)
                         pr_debug("problem incrementing symbol period, skipping event\n");
         }
@@ -358,7 +268,7 @@ static int process_read_event(struct perf_tool *tool,
                               struct perf_evsel *evsel,
                               struct machine *machine __maybe_unused)
 {
-        struct perf_report *rep = container_of(tool, struct perf_report, tool);
+        struct report *rep = container_of(tool, struct report, tool);
 
         if (rep->show_threads) {
                 const char *name = evsel ? perf_evsel__name(evsel) : "unknown";
@@ -377,7 +287,7 @@ static int process_read_event(struct perf_tool *tool,
 }
 
 /* For pipe mode, sample_type is not currently set */
-static int perf_report__setup_sample_type(struct perf_report *rep)
+static int report__setup_sample_type(struct report *rep)
 {
         struct perf_session *session = rep->session;
         u64 sample_type = perf_evlist__combined_sample_type(session->evlist);
@@ -422,8 +332,7 @@ static void sig_handler(int sig __maybe_unused)
         session_done = 1;
 }
 
-static size_t hists__fprintf_nr_sample_events(struct perf_report *rep,
-                                              struct hists *hists,
+static size_t hists__fprintf_nr_sample_events(struct hists *hists, struct report *rep,
                                               const char *evname, FILE *fp)
 {
         size_t ret;
@@ -460,12 +369,12 @@ static size_t hists__fprintf_nr_sample_events(struct perf_report *rep,
 }
 
 static int perf_evlist__tty_browse_hists(struct perf_evlist *evlist,
-                                         struct perf_report *rep,
+                                         struct report *rep,
                                          const char *help)
 {
         struct perf_evsel *pos;
 
-        list_for_each_entry(pos, &evlist->entries, node) {
+        evlist__for_each(evlist, pos) {
                 struct hists *hists = &pos->hists;
                 const char *evname = perf_evsel__name(pos);
 
@@ -473,7 +382,7 @@ static int perf_evlist__tty_browse_hists(struct perf_evlist *evlist,
                     !perf_evsel__is_group_leader(pos))
                         continue;
 
-                hists__fprintf_nr_sample_events(rep, hists, evname, stdout);
+                hists__fprintf_nr_sample_events(hists, rep, evname, stdout);
                 hists__fprintf(hists, true, 0, 0, rep->min_percent, stdout);
                 fprintf(stdout, "\n\n");
         }
@@ -493,43 +402,11 @@ static int perf_evlist__tty_browse_hists(struct perf_evlist *evlist,
         return 0;
 }
 
-static int __cmd_report(struct perf_report *rep)
+static void report__warn_kptr_restrict(const struct report *rep)
 {
-        int ret = -EINVAL;
-        u64 nr_samples;
-        struct perf_session *session = rep->session;
-        struct perf_evsel *pos;
-        struct map *kernel_map;
-        struct kmap *kernel_kmap;
-        const char *help = "For a higher level overview, try: perf report --sort comm,dso";
-        struct ui_progress prog;
-        struct perf_data_file *file = session->file;
-
-        signal(SIGINT, sig_handler);
-
-        if (rep->cpu_list) {
-                ret = perf_session__cpu_bitmap(session, rep->cpu_list,
-                                               rep->cpu_bitmap);
-                if (ret)
-                        return ret;
-        }
+        struct map *kernel_map = rep->session->machines.host.vmlinux_maps[MAP__FUNCTION];
+        struct kmap *kernel_kmap = map__kmap(kernel_map);
 
-        if (use_browser <= 0)
-                perf_session__fprintf_info(session, stdout, rep->show_full_info);
-
-        if (rep->show_threads)
-                perf_read_values_init(&rep->show_threads_values);
-
-        ret = perf_report__setup_sample_type(rep);
-        if (ret)
-                return ret;
-
-        ret = perf_session__process_events(session, &rep->tool);
-        if (ret)
-                return ret;
-
-        kernel_map = session->machines.host.vmlinux_maps[MAP__FUNCTION];
-        kernel_kmap = map__kmap(kernel_map);
         if (kernel_map == NULL ||
             (kernel_map->dso->hit &&
              (kernel_kmap->ref_reloc_sym == NULL ||
@@ -552,26 +429,73 @@ static int __cmd_report(struct perf_report *rep)
 "Samples in kernel modules can't be resolved as well.\n\n",
                 desc);
         }
+}
 
-        if (verbose > 3)
-                perf_session__fprintf(session, stdout);
+static int report__gtk_browse_hists(struct report *rep, const char *help)
+{
+        int (*hist_browser)(struct perf_evlist *evlist, const char *help,
+                            struct hist_browser_timer *timer, float min_pcnt);
 
-        if (verbose > 2)
-                perf_session__fprintf_dsos(session, stdout);
+        hist_browser = dlsym(perf_gtk_handle, "perf_evlist__gtk_browse_hists");
 
-        if (dump_trace) {
-                perf_session__fprintf_nr_events(session, stdout);
-                return 0;
+        if (hist_browser == NULL) {
+                ui__error("GTK browser not found!\n");
+                return -1;
         }
 
-        nr_samples = 0;
-        list_for_each_entry(pos, &session->evlist->entries, node)
+        return hist_browser(rep->session->evlist, help, NULL, rep->min_percent);
+}
+
+static int report__browse_hists(struct report *rep)
+{
+        int ret;
+        struct perf_session *session = rep->session;
+        struct perf_evlist *evlist = session->evlist;
+        const char *help = "For a higher level overview, try: perf report --sort comm,dso";
+
+        switch (use_browser) {
+        case 1:
+                ret = perf_evlist__tui_browse_hists(evlist, help, NULL,
+                                                    rep->min_percent,
+                                                    &session->header.env);
+                /*
+                 * Usually "ret" is the last pressed key, and we only
+                 * care if the key notifies us to switch data file.
+                 */
+                if (ret != K_SWITCH_INPUT_DATA)
+                        ret = 0;
+                break;
+        case 2:
+                ret = report__gtk_browse_hists(rep, help);
+                break;
+        default:
+                ret = perf_evlist__tty_browse_hists(evlist, rep, help);
+                break;
+        }
+
+        return ret;
+}
+
+static u64 report__collapse_hists(struct report *rep)
+{
+        struct ui_progress prog;
+        struct perf_evsel *pos;
+        u64 nr_samples = 0;
+        /*
+         * Count number of histogram entries to use when showing progress,
+         * reusing nr_samples variable.
+         */
+        evlist__for_each(rep->session->evlist, pos)
                 nr_samples += pos->hists.nr_entries;
 
         ui_progress__init(&prog, nr_samples, "Merging related events...");
-
+        /*
+         * Count total number of samples, will be used to check if this
+         * session had any.
+         */
         nr_samples = 0;
-        list_for_each_entry(pos, &session->evlist->entries, node) {
+
+        evlist__for_each(rep->session->evlist, pos) {
                 struct hists *hists = &pos->hists;
 
                 if (pos->idx == 0)
@@ -589,8 +513,57 @@ static int __cmd_report(struct perf_report *rep)
                         hists__link(leader_hists, hists);
                 }
         }
+
         ui_progress__finish();
 
+        return nr_samples;
+}
+
+static int __cmd_report(struct report *rep)
+{
+        int ret;
+        u64 nr_samples;
+        struct perf_session *session = rep->session;
+        struct perf_evsel *pos;
+        struct perf_data_file *file = session->file;
+
+        signal(SIGINT, sig_handler);
+
+        if (rep->cpu_list) {
+                ret = perf_session__cpu_bitmap(session, rep->cpu_list,
+                                               rep->cpu_bitmap);
+                if (ret)
+                        return ret;
+        }
+
+        if (rep->show_threads)
+                perf_read_values_init(&rep->show_threads_values);
+
+        ret = report__setup_sample_type(rep);
+        if (ret)
+                return ret;
+
+        ret = perf_session__process_events(session, &rep->tool);
+        if (ret)
+                return ret;
+
+        report__warn_kptr_restrict(rep);
+
+        if (use_browser == 0) {
+                if (verbose > 3)
+                        perf_session__fprintf(session, stdout);
+
+                if (verbose > 2)
+                        perf_session__fprintf_dsos(session, stdout);
+
+                if (dump_trace) {
+                        perf_session__fprintf_nr_events(session, stdout);
+                        return 0;
+                }
+        }
+
+        nr_samples = report__collapse_hists(rep);
+
         if (session_done())
                 return 0;
 
@@ -599,47 +572,16 @@ static int __cmd_report(struct perf_report *rep)
                 return 0;
         }
 
-        list_for_each_entry(pos, &session->evlist->entries, node)
+        evlist__for_each(session->evlist, pos)
                 hists__output_resort(&pos->hists);
 
-        if (use_browser > 0) {
-                if (use_browser == 1) {
-                        ret = perf_evlist__tui_browse_hists(session->evlist,
-                                                        help, NULL,
-                                                        rep->min_percent,
-                                                        &session->header.env);
-                        /*
-                         * Usually "ret" is the last pressed key, and we only
-                         * care if the key notifies us to switch data file.
-                         */
-                        if (ret != K_SWITCH_INPUT_DATA)
-                                ret = 0;
-
-                } else if (use_browser == 2) {
-                        int (*hist_browser)(struct perf_evlist *,
-                                            const char *,
-                                            struct hist_browser_timer *,
-                                            float min_pcnt);
-
-                        hist_browser = dlsym(perf_gtk_handle,
-                                             "perf_evlist__gtk_browse_hists");
-                        if (hist_browser == NULL) {
-                                ui__error("GTK browser not found!\n");
-                                return ret;
-                        }
-                        hist_browser(session->evlist, help, NULL,
-                                     rep->min_percent);
-                }
-        } else
-                perf_evlist__tty_browse_hists(session->evlist, rep, help);
-
-        return ret;
+        return report__browse_hists(rep);
 }
 
 static int
 parse_callchain_opt(const struct option *opt, const char *arg, int unset)
 {
-        struct perf_report *rep = (struct perf_report *)opt->value;
+        struct report *rep = (struct report *)opt->value;
         char *tok, *tok2;
         char *endptr;
 
@@ -721,7 +663,7 @@ parse_callchain_opt(const struct option *opt, const char *arg, int unset)
                 return -1;
 setup:
         if (callchain_register_param(&callchain_param) < 0) {
-                fprintf(stderr, "Can't register callchain params\n");
+                pr_err("Can't register callchain params\n");
                 return -1;
         }
         return 0;
@@ -759,7 +701,7 @@ static int
 parse_percent_limit(const struct option *opt, const char *str,
                     int unset __maybe_unused)
 {
-        struct perf_report *rep = opt->value;
+        struct report *rep = opt->value;
 
         rep->min_percent = strtof(str, NULL);
         return 0;
@@ -777,7 +719,7 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
                 "perf report [<options>]",
                 NULL
         };
-        struct perf_report report = {
+        struct report report = {
                 .tool = {
                         .sample          = process_sample_event,
                         .mmap            = perf_event__process_mmap,
@@ -820,6 +762,9 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
         OPT_BOOLEAN(0, "gtk", &report.use_gtk, "Use the GTK2 interface"),
         OPT_BOOLEAN(0, "stdio", &report.use_stdio,
                     "Use the stdio interface"),
+        OPT_BOOLEAN(0, "header", &report.header, "Show data header."),
+        OPT_BOOLEAN(0, "header-only", &report.header_only,
+                    "Show only data header."),
         OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
                    "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline,"
                    " dso_to, dso_from, symbol_to, symbol_from, mispredict,"
@@ -890,7 +835,7 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
                 .mode  = PERF_DATA_MODE_READ,
         };
 
-        perf_config(perf_report_config, &report);
+        perf_config(report__config, &report);
 
         argc = parse_options(argc, argv, options, report_usage, 0);
 
@@ -940,7 +885,7 @@ repeat:
         }
         if (report.mem_mode) {
                 if (sort__mode == SORT_MODE__BRANCH) {
-                        fprintf(stderr, "branch and mem mode incompatible\n");
+                        pr_err("branch and mem mode incompatible\n");
                         goto error;
                 }
                 sort__mode = SORT_MODE__MEMORY;
@@ -963,6 +908,10 @@ repeat:
                         goto error;
         }
 
+        /* Force tty output for header output. */
+        if (report.header || report.header_only)
+                use_browser = 0;
+
         if (strcmp(input_name, "-") != 0)
                 setup_browser(true);
         else {
@@ -970,6 +919,16 @@ repeat:
                 perf_hpp__init();
         }
 
+        if (report.header || report.header_only) {
+                perf_session__fprintf_info(session, stdout,
+                                           report.show_full_info);
+                if (report.header_only)
+                        return 0;
+        } else if (use_browser == 0) {
+                fputs("# To display the perf.data header info, please use --header/--header-only options.\n#\n",
+                      stdout);
+        }
+
         /*
          * Only in the TUI browser we are doing integrated annotation,
          * so don't allocate extra space that won't be used in the stdio