[PATCH 20/47] perf tools: Add stat config event read function

Jiri Olsa
2015-07-21T12:41:27Z

Introducing perf_event__read_stat_config function to read
struct perf_stat_config object data from stat config event.

Link: http://lkml.kernel.org/n/tip-62ae08zz97jp2qkhygp8uet5@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/tests/stat.c | 6 ++++++
tools/perf/util/event.c | 24 ++++++++++++++++++++++++
tools/perf/util/event.h | 2 ++
3 files changed, 32 insertions(+)

diff --git a/tools/perf/tests/stat.c b/tools/perf/tests/stat.c
index 5e6a2441998c..2049c5a3e4a2 100644
--- a/tools/perf/tests/stat.c
+++ b/tools/perf/tests/stat.c
@@ -24,6 +24,7 @@ static int process_event(struct perf_tool *tool __maybe_unused,
struct machine *machine __maybe_unused)
{
struct stat_config_event *config = &event->stat_config;
+ struct perf_stat_config stat_config;

#define HAS(term, val) \
has_term(config, PERF_STAT_CONFIG_TERM__##term, val)
@@ -35,6 +36,11 @@ static int process_event(struct perf_tool *tool __maybe_unused,

#undef HAS

+ perf_event__read_stat_config(&stat_config, config);
+
+ TEST_ASSERT_VAL("wrong aggr_mode", stat_config.aggr_mode == AGGR_CORE);
+ TEST_ASSERT_VAL("wrong scale", stat_config.scale == 1);
+ TEST_ASSERT_VAL("wrong interval", stat_config.interval == 1);
return 0;
}

diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index aa166ebf9fc0..887731b52c40 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -803,6 +803,30 @@ int perf_event__synthesize_stat_config(struct perf_tool *tool,
return err;
}

+void perf_event__read_stat_config(struct perf_stat_config *config,
+ struct stat_config_event *event)
+{
+ unsigned i;
+
+ for (i = 0; i < event->nr; i++) {
+
+ switch (event->data[i].tag) {
+#define CASE(__term, __val) \
+ case PERF_STAT_CONFIG_TERM__##__term: \
+ config->__val = event->data[i].val; \
+ break;
+
+ CASE(AGGR_MODE, aggr_mode);
+ CASE(SCALE, scale);
+ CASE(INTERVAL, interval);
+#undef CASE
+ default:
+ pr_warning("unknown stat config term %" PRIu64 "\n",
+ event->data[i].tag);
+ }
+ }
+}
+
size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
{
const char *s;
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index 23dba7bb8973..72da01b30cf9 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -448,6 +448,8 @@ int perf_event__synthesize_stat_config(struct perf_tool *tool,
struct perf_stat_config *config,
perf_event__handler_t process,
struct machine *machine);
+void perf_event__read_stat_config(struct perf_stat_config *config,
+ struct stat_config_event *event);

int perf_event__synthesize_modules(struct perf_tool *tool,
perf_event__handler_t process,
--
2.4.3