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perf report: Add --percentage option

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The --percentage option is for controlling overhead percentage
displayed.  It can only receive either of "relative" or "absolute".

"relative" means it's relative to filtered entries only so that the
sum of shown entries will be always 100%.  "absolute" means it retains
the original value before and after the filter is applied.

  $ perf report -s comm
  # Overhead       Command
  # ........  ............
  #
      74.19%           cc1
       7.61%           gcc
       6.11%            as
       4.35%            sh
       4.14%          make
       1.13%        fixdep
  ...

  $ perf report -s comm -c cc1,gcc --percentage absolute
  # Overhead       Command
  # ........  ............
  #
      74.19%           cc1
       7.61%           gcc

  $ perf report -s comm -c cc1,gcc --percentage relative
  # Overhead       Command
  # ........  ............
  #
      90.69%           cc1
       9.31%           gcc

Note that it has zero effect if no filter was applied.

Suggested-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1397145720-8063-3-git-send-email-namhyung@kernel.org
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
This commit is contained in:
Namhyung Kim
2014-01-14 11:52:48 +09:00
committed by Jiri Olsa
parent 1ab1fa5dfb
commit f214833054
9 changed files with 106 additions and 46 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
tools/perf/builtin-report.c
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@@ -343,6 +343,11 @@ static size_t hists__fprintf_nr_sample_events(struct hists *hists, struct report
char buf[512];
size_t size = sizeof(buf);
if (symbol_conf.filter_relative) {
nr_samples = hists->stats.nr_non_filtered_samples;
nr_events = hists->stats.total_non_filtered_period;
}
if (perf_evsel__is_group_event(evsel)) {
struct perf_evsel *pos;
@@ -350,8 +355,13 @@ static size_t hists__fprintf_nr_sample_events(struct hists *hists, struct report
evname = buf;
for_each_group_member(pos, evsel) {
nr_samples += pos->hists.stats.nr_events[PERF_RECORD_SAMPLE];
nr_events += pos->hists.stats.total_period;
if (symbol_conf.filter_relative) {
nr_samples += pos->hists.stats.nr_non_filtered_samples;
nr_events += pos->hists.stats.total_non_filtered_period;
} else {
nr_samples += pos->hists.stats.nr_events[PERF_RECORD_SAMPLE];
nr_events += pos->hists.stats.total_period;
}
}
}
@@ -707,6 +717,20 @@ parse_percent_limit(const struct option *opt, const char *str,
return 0;
}
static int
parse_percentage(const struct option *opt __maybe_unused, const char *str,
int unset __maybe_unused)
{
if (!strcmp(str, "relative"))
symbol_conf.filter_relative = true;
else if (!strcmp(str, "absolute"))
symbol_conf.filter_relative = false;
else
return -1;
return 0;
}
int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
{
struct perf_session *session;
@@ -829,6 +853,8 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
OPT_BOOLEAN(0, "mem-mode", &report.mem_mode, "mem access profile"),
OPT_CALLBACK(0, "percent-limit", &report, "percent",
"Don't show entries under that percent", parse_percent_limit),
OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
"how to display percentage of filtered entries", parse_percentage),
OPT_END()
};
struct perf_data_file file = {