perf top browser: Show sample_freq in browser title line

The '--stdio' 'perf top' UI shows it, so lets remove this UI difference
and show it too in '--tui', will be useful for 'perf top --tui -F max'.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-n3wd8n395uo4y9irst29pjic@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index 6495ee5..de2bde2 100644 (file)
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -2223,7 +2223,7 @@ static int perf_evsel_browser_title(struct hist_browser *browser,
        u64 nr_events = hists->stats.total_period;
        struct perf_evsel *evsel = hists_to_evsel(hists);
        const char *ev_name = perf_evsel__name(evsel);
-       char buf[512];
+       char buf[512], sample_freq_str[64] = "";
        size_t buflen = sizeof(buf);
        char ref[30] = " show reference callgraph, ";
        bool enable_ref = false;
@@ -2255,10 +2255,14 @@ static int perf_evsel_browser_title(struct hist_browser *browser,
        if (symbol_conf.show_ref_callgraph &&
            strstr(ev_name, "call-graph=no"))
                enable_ref = true;
+
+       if (!is_report_browser(hbt))
+               scnprintf(sample_freq_str, sizeof(sample_freq_str), " %d Hz,", evsel->attr.sample_freq);
+
        nr_samples = convert_unit(nr_samples, &unit);
        printed = scnprintf(bf, size,
-                          "Samples: %lu%c of event '%s',%sEvent count (approx.): %" PRIu64,
-                          nr_samples, unit, ev_name, enable_ref ? ref : " ", nr_events);
+                          "Samples: %lu%c of event '%s',%s%sEvent count (approx.): %" PRIu64,
+                          nr_samples, unit, ev_name, sample_freq_str, enable_ref ? ref : " ", nr_events);
 
 
        if (hists->uid_filter_str)