perf top: Add --percentage option

The --percentage option is for controlling overhead percentage
displayed.  It can only receive either of "relative" or "absolute".
Move the parser callback function into a common location since it's
used by multiple commands now.

For more information, please see previous commit same thing done to
"perf report".

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1397145720-8063-4-git-send-email-namhyung@kernel.org
Signed-off-by: Jiri Olsa <jolsa@redhat.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index 3191496bd3b7..a4ec336ae3fe 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -254,4 +254,9 @@ static inline int script_browse(const char *script_opt __maybe_unused)
 #endif
 
 unsigned int hists__sort_list_width(struct hists *hists);
+
+struct option;
+int parse_filter_percentage(const struct option *opt __maybe_unused,
+                            const char *arg, int unset __maybe_unused);
+
 #endif  /* __PERF_HIST_H */