[RFC PATCH v2 13/13] perf metricgroup: Support adding metrics for system PMUs

From: John Garry
Date: Fri Apr 17 2020 - 06:45:51 EST


Currently only adding metrics for core- or uncore-based events is
supported. Extend this for system events.

Signed-off-by: John Garry <john.garry@xxxxxxxxxx>
---
tools/perf/util/metricgroup.c | 40 ++++++++++++++++++++++++++++++++++++----
1 file changed, 36 insertions(+), 4 deletions(-)

diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
index 81a6aa04a601..85bf5333e4c6 100644
--- a/tools/perf/util/metricgroup.c
+++ b/tools/perf/util/metricgroup.c
@@ -593,17 +593,34 @@ static int metricgroup__add_metric_pmu_event(struct pmu_event *pe,
return 0;
}

+struct metricgroup_add_iter_data {
+ const char *metric;
+ struct strbuf *events;
+ struct list_head *group_list;
+ int *ret;
+};
+
+static int metricgroup__add_metric_sys_event_iter(struct pmu_event *pe,
+ void *data)
+{
+ struct metricgroup_add_iter_data *d = data;
+
+ if (!match_pe_metric(pe, d->metric))
+ return 0;
+
+ return (*d->ret = metricgroup__add_metric_pmu_event(pe, d->events,
+ d->group_list));
+}
+
static int metricgroup__add_metric(const char *metric, struct strbuf *events,
struct list_head *group_list)
{
struct pmu_events_map *map = perf_pmu__find_map(NULL);
+ struct perf_pmu *pmu = NULL;
struct pmu_event *pe;
int i, ret = -EINVAL;

- if (!map)
- return 0;
-
- for (i = 0; ; i++) {
+ for (i = 0; map; i++) {
pe = &map->table[i];

if (!pe->name && !pe->metric_group && !pe->metric_name)
@@ -618,6 +635,21 @@ static int metricgroup__add_metric(const char *metric, struct strbuf *events,
return ret;
}
}
+
+ while ((pmu = perf_pmu__scan(pmu)) != NULL) {
+ struct metricgroup_iter_data data = {
+ .fn = metricgroup__add_metric_sys_event_iter,
+ .data = (void *) &(struct metricgroup_add_iter_data){
+ .metric = metric,
+ .events = events,
+ .group_list = group_list,
+ .ret = &ret,
+ },
+ };
+
+ pmu_for_each_sys_event(pmu, metricgroup__sys_event_iter, &data);
+ }
+
return ret;
}

--
2.16.4