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[RFC,4/7] perf metricgroup: always place duration_time last

Message ID 20200507081436.49071-5-irogers@google.com
State New
Headers show
Series [RFC,1/7] perf expr: migrate expr ids table to libbpf's hashmap | expand

Commit Message

Ian Rogers May 7, 2020, 8:14 a.m. UTC
If a metric contains the duration_time event then the event is placed
outside of the metric's group of events. Rather than split the group,
make it so the duration_time is immediately after the group.

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/util/metricgroup.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)
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Patch

diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
index 2356dda92a07..48d0143b4b0c 100644
--- a/tools/perf/util/metricgroup.c
+++ b/tools/perf/util/metricgroup.c
@@ -421,8 +421,8 @@  static void metricgroup__add_metric_weak_group(struct strbuf *events,
 					       struct expr_parse_ctx *ctx)
 {
 	struct hashmap_entry *cur;
-	size_t bkt, i = 0;
-	bool no_group = false;
+	size_t bkt;
+	bool no_group = true, has_duration = false;
 
 	hashmap__for_each_entry((&ctx->ids), cur, bkt) {
 		pr_debug("found event %s\n", (const char*)cur->key);
@@ -432,20 +432,20 @@  static void metricgroup__add_metric_weak_group(struct strbuf *events,
 		 * group.
 		 */
 		if (!strcmp(cur->key, "duration_time")) {
-			if (i > 0)
-				strbuf_addf(events, "}:W,");
-			strbuf_addf(events, "duration_time");
-			no_group = true;
+			has_duration = true;
 			continue;
 		}
 		strbuf_addf(events, "%s%s",
-			i == 0 || no_group ? "{" : ",",
+			no_group ? "{" : ",",
 			(const char*)cur->key);
 		no_group = false;
-		i++;
 	}
-	if (!no_group)
-		strbuf_addf(events, "}:W");
+	if (!no_group) {
+                strbuf_addf(events, "}:W");
+		if (has_duration)
+			strbuf_addf(events, ",duration_time");
+	} else if (has_duration)
+		strbuf_addf(events, "duration_time");
 }
 
 static void metricgroup__add_metric_non_group(struct strbuf *events,