[tip:perf/core] perf stat report: Allow to override aggr_mode

[tip-bot for Jiri Olsa]

Commit-ID:  89af4e05c21d68f22e07fe66940ea675615a49ed
Gitweb:     http://git.kernel.org/tip/89af4e05c21d68f22e07fe66940ea675615a49ed
Author:     Jiri Olsa <jolsa@xxxxxxxxxx>
AuthorDate: Thu, 5 Nov 2015 15:41:02 +0100
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Thu, 17 Dec 2015 16:30:30 -0300

perf stat report: Allow to override aggr_mode

Allowing to override record aggr_mode. It's possible to use perf stat
like:

   $ perf stat report -A
   $ perf stat report --per-core
   $ perf stat report --per-socket

To customize the recorded aggregate mode regardless what was used during
the stat record command.

Reported-by: Kan Liang <kan.liang@xxxxxxxxx>
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Link: http://lkml.kernel.org/r/1446734469-11352-19-git-send-email-jolsa@xxxxxxxxxx
[ Renamed 'stat' parameter to 'st' to fix 'already defined' build error with older distros (e.g. RHEL6.7) ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/Documentation/perf-stat.txt | 10 ++++++++++
 tools/perf/builtin-stat.c              | 17 +++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/tools/perf/Documentation/perf-stat.txt b/tools/perf/Documentation/perf-stat.txt
index 95f4928..52ef7a9 100644
--- a/tools/perf/Documentation/perf-stat.txt
+++ b/tools/perf/Documentation/perf-stat.txt
@@ -182,6 +182,16 @@ Reads and reports stat data from perf data file.
 --input file::
 Input file name.
 
+--per-socket::
+Aggregate counts per processor socket for system-wide mode measurements.
+
+--per-core::
+Aggregate counts per physical processor for system-wide mode measurements.
+
+-A::
+--no-aggr::
+Do not aggregate counts across all monitored CPUs.
+
 
 EXAMPLES
 --------
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 3ccf5a9..9805e03 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -138,6 +138,7 @@ struct perf_stat {
 	bool			 maps_allocated;
 	struct cpu_map		*cpus;
 	struct thread_map	*threads;
+	enum aggr_mode		 aggr_mode;
 };
 
 static struct perf_stat		perf_stat;
@@ -1663,6 +1664,15 @@ int process_stat_config_event(struct perf_tool *tool __maybe_unused,
 
 	perf_event__read_stat_config(&stat_config, &event->stat_config);
 
+	if (cpu_map__empty(st->cpus)) {
+		if (st->aggr_mode != AGGR_UNSET)
+			pr_warning("warning: processing task data, aggregation mode not set\n");
+		return 0;
+	}
+
+	if (st->aggr_mode != AGGR_UNSET)
+		stat_config.aggr_mode = st->aggr_mode;
+
 	if (perf_stat.file.is_pipe)
 		perf_stat_init_aggr_mode();
 	else
@@ -1743,6 +1753,7 @@ static struct perf_stat perf_stat = {
 		.stat		= perf_event__process_stat_event,
 		.stat_round	= process_stat_round_event,
 	},
+	.aggr_mode = AGGR_UNSET,
 };
 
 static int __cmd_report(int argc, const char **argv)
@@ -1750,6 +1761,12 @@ static int __cmd_report(int argc, const char **argv)
 	struct perf_session *session;
 	const struct option options[] = {
 	OPT_STRING('i', "input", &input_name, "file", "input file name"),
+	OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode,
+		     "aggregate counts per processor socket", AGGR_SOCKET),
+	OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode,
+		     "aggregate counts per physical processor core", AGGR_CORE),
+	OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode,
+		     "disable CPU count aggregation", AGGR_NONE),
 	OPT_END()
 	};
 	struct stat st;
--
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