[PATCH RFC v4 12/13] perf metricgroup: Support adding metrics for system PMUs

From: John Garry
Date: Thu Oct 08 2020 - 06:19:41 EST


Currently adding metrics for core- or uncore-based events matched by CPUID
is supported.

Extend this for system events.

Signed-off-by: John Garry <john.garry@xxxxxxxxxx>
---
tools/perf/util/metricgroup.c | 59 +++++++++++++++++++++++++++++++++--
1 file changed, 56 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
index 03f811eb600b..212b011240e5 100644
--- a/tools/perf/util/metricgroup.c
+++ b/tools/perf/util/metricgroup.c
@@ -413,6 +413,12 @@ static bool match_metric(const char *n, const char *list)
return false;
}

+static bool match_pe_metric(struct pmu_event *pe, const char *metric)
+{
+ return match_metric(pe->metric_group, metric) ||
+ match_metric(pe->metric_name, metric);
+}
+
struct mep {
struct rb_node nd;
const char *name;
@@ -753,6 +759,16 @@ int __weak arch_get_runtimeparam(void)
return 1;
}

+struct metricgroup_add_iter_data {
+ struct list_head *metric_list;
+ const char *metric;
+ struct metric **m;
+ bool metric_no_group;
+ struct expr_ids *ids;
+ bool *has_match;
+ int *ret;
+};
+
static int __add_metric(struct list_head *metric_list,
struct pmu_event *pe,
bool metric_no_group,
@@ -863,7 +879,7 @@ static int __add_metric(struct list_head *metric_list,
}

#define map_for_each_event(__pe, __idx, __map) \
- for (__idx = 0, __pe = &__map->table[__idx]; \
+ if (__map) for (__idx = 0, __pe = &__map->table[__idx]; \
__pe->name || __pe->metric_group || __pe->metric_name; \
__pe = &__map->table[++__idx])

@@ -1033,6 +1049,29 @@ static int add_metric(struct list_head *metric_list,
return ret;
}

+static int metricgroup__add_metric_sys_event_iter(struct pmu_event *pe,
+ void *data)
+{
+ struct metricgroup_add_iter_data *d = data;
+ int ret;
+
+ if (!match_pe_metric(pe, d->metric))
+ return 0;
+
+ ret = add_metric(d->metric_list, pe, d->metric_no_group, d->m, NULL, d->ids);
+ if (ret)
+ return ret;
+
+ ret = resolve_metric(d->metric_no_group,
+ d->metric_list, NULL, d->ids);
+ if (ret)
+ return ret;
+
+ *(d->has_match) = true;
+
+ return *d->ret;
+}
+
static int metricgroup__add_metric(const char *metric, bool metric_no_group,
struct strbuf *events,
struct list_head *metric_list,
@@ -1063,6 +1102,22 @@ static int metricgroup__add_metric(const char *metric, bool metric_no_group,
goto out;
}

+ {
+ struct metricgroup_iter_data data = {
+ .fn = metricgroup__add_metric_sys_event_iter,
+ .data = (void *) &(struct metricgroup_add_iter_data) {
+ .metric_list = &list,
+ .metric = metric,
+ .metric_no_group = metric_no_group,
+ .m = &m,
+ .ids = &ids,
+ .has_match = &has_match,
+ .ret = &ret,
+ },
+ };
+
+ pmu_for_each_sys_event(metricgroup__sys_event_iter, &data);
+ }
/* End of pmu events. */
if (!has_match) {
ret = -EINVAL;
@@ -1189,8 +1244,6 @@ int metricgroup__parse_groups(const struct option *opt,
struct evlist *perf_evlist = *(struct evlist **)opt->value;
struct pmu_events_map *map = perf_pmu__find_map(NULL);

- if (!map)
- return 0;

return parse_groups(perf_evlist, str, metric_no_group,
metric_no_merge, NULL, metric_events, map);
--
2.26.2