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Subject[PATCH v2 3/7] perf metricgroup: Delay events string creation
From
Currently event groups are placed into groups_list at the same time as
the events string containing the events is built. Separate these two
operations and build the groups_list first, then the event string from
the groups_list. This adds an ability to reorder the groups_list that
will be used in a later patch.

Signed-off-by: Ian Rogers <irogers@google.com>
---
tools/perf/util/metricgroup.c | 33 +++++++++++++++++++++------------
1 file changed, 21 insertions(+), 12 deletions(-)

diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
index 5c0603ef4c75..dca433520b92 100644
--- a/tools/perf/util/metricgroup.c
+++ b/tools/perf/util/metricgroup.c
@@ -90,6 +90,7 @@ struct egroup {
const char *metric_expr;
const char *metric_unit;
int runtime;
+ bool has_constraint;
};

static struct evsel *find_evsel_group(struct evlist *perf_evlist,
@@ -485,8 +486,8 @@ int __weak arch_get_runtimeparam(void)
return 1;
}

-static int __metricgroup__add_metric(struct strbuf *events,
- struct list_head *group_list, struct pmu_event *pe, int runtime)
+static int __metricgroup__add_metric(struct list_head *group_list,
+ struct pmu_event *pe, int runtime)
{
struct egroup *eg;

@@ -499,6 +500,7 @@ static int __metricgroup__add_metric(struct strbuf *events,
eg->metric_expr = pe->metric_expr;
eg->metric_unit = pe->unit;
eg->runtime = runtime;
+ eg->has_constraint = metricgroup__has_constraint(pe);

if (expr__find_other(pe->metric_expr, NULL, &eg->pctx, runtime) < 0) {
expr__ctx_clear(&eg->pctx);
@@ -506,14 +508,6 @@ static int __metricgroup__add_metric(struct strbuf *events,
return -EINVAL;
}

- if (events->len > 0)
- strbuf_addf(events, ",");
-
- if (metricgroup__has_constraint(pe))
- metricgroup__add_metric_non_group(events, &eg->pctx);
- else
- metricgroup__add_metric_weak_group(events, &eg->pctx);
-
list_add_tail(&eg->nd, group_list);

return 0;
@@ -524,6 +518,7 @@ static int metricgroup__add_metric(const char *metric, struct strbuf *events,
{
struct pmu_events_map *map = perf_pmu__find_map(NULL);
struct pmu_event *pe;
+ struct egroup *eg;
int i, ret;
bool has_match = false;

@@ -547,7 +542,8 @@ static int metricgroup__add_metric(const char *metric, struct strbuf *events,
pr_debug("metric expr %s for %s\n", pe->metric_expr, pe->metric_name);

if (!strstr(pe->metric_expr, "?")) {
- ret = __metricgroup__add_metric(events, group_list, pe, 1);
+ ret = __metricgroup__add_metric(group_list,
+ pe, 1);
if (ret)
return ret;
} else {
@@ -561,13 +557,26 @@ static int metricgroup__add_metric(const char *metric, struct strbuf *events,
*/

for (j = 0; j < count; j++) {
- ret = __metricgroup__add_metric(events, group_list, pe, j);
+ ret = __metricgroup__add_metric(
+ group_list, pe, j);
if (ret)
return ret;
}
}
}
}
+ list_for_each_entry(eg, group_list, nd) {
+ if (events->len > 0)
+ strbuf_addf(events, ",");
+
+ if (eg->has_constraint) {
+ metricgroup__add_metric_non_group(events,
+ &eg->pctx);
+ } else {
+ metricgroup__add_metric_weak_group(events,
+ &eg->pctx);
+ }
+ }
return 0;
}

--
2.26.2.761.g0e0b3e54be-goog
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