perf diff: Add -p option to display period values for hist entries

Adding -p option to show period values for both compared hist entries.
Showing hist column PERF_HPP__PERIOD and newly added hist column
PERF_HPP__PERIOD_BASELINE.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1349448287-18919-6-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 9 insertions, 1 deletions

diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index d78e8386e1a9..2411dd18c556 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -24,6 +24,7 @@ static char const *input_old = "perf.data.old",
 static char       diff__default_sort_order[] = "dso,symbol";
 static bool  force;
 static bool show_displacement;
+static bool show_period;
 static bool show_baseline_only;
 static bool sort_compute;
 
@@ -540,6 +541,8 @@ static const struct option options[] = {
                      "delta,ratio,wdiff:w1,w2 (default delta)",
                      "Entries differential computation selection",
                      setup_compute),
+        OPT_BOOLEAN('p', "period", &show_period,
+                    "Show period values."),
         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
                     "dump raw trace in ASCII"),
         OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
@@ -568,7 +571,7 @@ static void ui_init(void)
         /* No overhead column. */
         perf_hpp__column_enable(PERF_HPP__OVERHEAD, false);
 
-        /* Display baseline/delta/ratio/displacement columns. */
+        /* Display baseline/delta/ratio/displacement/periods columns. */
         perf_hpp__column_enable(PERF_HPP__BASELINE, true);
 
         switch (compute) {
@@ -587,6 +590,11 @@ static void ui_init(void)
 
         if (show_displacement)
                 perf_hpp__column_enable(PERF_HPP__DISPL, true);
+
+        if (show_period) {
+                perf_hpp__column_enable(PERF_HPP__PERIOD, true);
+                perf_hpp__column_enable(PERF_HPP__PERIOD_BASELINE, true);
+        }
 }
 
 int cmd_diff(int argc, const char **argv, const char *prefix __maybe_unused)