perf report: Add option to show total period

Just like --show-nr-samples, to help in diagnosing problems in the
tools.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-1lr7ejdjfvy2uwy2wkmatcpq@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

4 files changed, 24 insertions, 0 deletions

diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
index 6349b6c0e3ec..4e82c19cbbbe 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -137,6 +137,8 @@ OPTIONS
 -M::
 --disassembler-style=:: Set disassembler style for objdump.
 
+--show-total-period:: Show a column with the sum of periods.
+
 SEE ALSO
 --------
 linkperf:perf-stat[1]
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index b125742e5cfd..c1cc7ab6f849 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -486,6 +486,8 @@ static const struct option options[] = {
         OPT_STRING('c', "cpu", &cpu_list, "cpu", "list of cpus to profile"),
         OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
                    "Specify disassembler style (e.g. -M intel for intel syntax)"),
+        OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
+                    "Show a column with the sum of periods"),
         OPT_END()
 };
 
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 24cca0a7ffa3..32c90865940f 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -664,6 +664,13 @@ int hist_entry__snprintf(struct hist_entry *self, char *s, size_t size,
                         ret += snprintf(s + ret, size - ret, "%11" PRIu64, nr_events);
         }
 
+        if (symbol_conf.show_total_period) {
+                if (sep)
+                        ret += snprintf(s + ret, size - ret, "%c%" PRIu64, *sep, period);
+                else
+                        ret += snprintf(s + ret, size - ret, " %12" PRIu64, period);
+        }
+
         if (pair_hists) {
                 char bf[32];
                 double old_percent = 0, new_percent = 0, diff;
@@ -770,6 +777,13 @@ size_t hists__fprintf(struct hists *hists, struct hists *pair,
                         fputs("  Samples  ", fp);
         }
 
+        if (symbol_conf.show_total_period) {
+                if (sep)
+                        ret += fprintf(fp, "%cPeriod", *sep);
+                else
+                        ret += fprintf(fp, "   Period    ");
+        }
+
         if (symbol_conf.show_cpu_utilization) {
                 if (sep) {
                         ret += fprintf(fp, "%csys", *sep);
@@ -834,6 +848,8 @@ size_t hists__fprintf(struct hists *hists, struct hists *pair,
         fprintf(fp, "# ........");
         if (symbol_conf.show_nr_samples)
                 fprintf(fp, " ..........");
+        if (symbol_conf.show_total_period)
+                fprintf(fp, " ............");
         if (pair) {
                 fprintf(fp, " ..........");
                 if (show_displacement)
@@ -917,6 +933,9 @@ unsigned int hists__sort_list_width(struct hists *hists)
         if (symbol_conf.show_nr_samples)
                 ret += 11;
 
+        if (symbol_conf.show_total_period)
+                ret += 13;
+
         list_for_each_entry(se, &hist_entry__sort_list, list)
                 if (!se->elide)
                         ret += 2 + hists__col_len(hists, se->se_width_idx);
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 7733f0b3cd41..29f8d742e92f 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -72,6 +72,7 @@ struct symbol_conf {
                         use_modules,
                         sort_by_name,
                         show_nr_samples,
+                        show_total_period,
                         use_callchain,
                         exclude_other,
                         show_cpu_utilization,