linux-kernel - [PATCH 3/3] perf tools metric: Don't include duration

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Message-Id: <20190628220737.13259-3-andi@firstfloor.org>
Date:   Fri, 28 Jun 2019 15:07:37 -0700
From:   Andi Kleen <andi@...stfloor.org>
To:     acme@...nel.org
Cc:     jolsa@...nel.org, linux-kernel@...r.kernel.org,
        Andi Kleen <ak@...ux.intel.com>
Subject: [PATCH 3/3] perf tools metric: Don't include duration_time in group

From: Andi Kleen <ak@...ux.intel.com>

The Memory_BW metric generates groups including duration_time,
which maps to a software event.

For some reason this makes the group always not count.

Always put duration_time outside a group when generating metrics.
It's always the same time, so no need to group it.

Signed-off-by: Andi Kleen <ak@...ux.intel.com>
---
 tools/perf/util/metricgroup.c | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
index 1c85c9624c58..17ec05e17e7b 100644
--- a/tools/perf/util/metricgroup.c
+++ b/tools/perf/util/metricgroup.c
@@ -410,6 +410,7 @@ static int metricgroup__add_metric(const char *metric, struct strbuf *events,
 			const char **ids;
 			int idnum;
 			struct egroup *eg;
+			bool no_group = false;
 
 			pr_debug("metric expr %s for %s\n", pe->metric_expr, pe->metric_name);
 
@@ -420,11 +421,25 @@ static int metricgroup__add_metric(const char *metric, struct strbuf *events,
 				strbuf_addf(events, ",");
 			for (j = 0; j < idnum; j++) {
 				pr_debug("found event %s\n", ids[j]);
+				/*
+				 * Duration time maps to a software event and can make
+				 * groups not count. Always use it outside a
+				 * group.
+				 */
+				if (!strcmp(ids[j], "duration_time")) {
+					if (j > 0)
+						strbuf_addf(events, "}:W,");
+					strbuf_addf(events, "duration_time");
+					no_group = true;
+					continue;
+				}
 				strbuf_addf(events, "%s%s",
-					j == 0 ? "{" : ",",
+					j == 0 || no_group ? "{" : ",",
 					ids[j]);
+				no_group = false;
 			}
-			strbuf_addf(events, "}:W");
+			if (!no_group)
+				strbuf_addf(events, "}:W");
 
 			eg = malloc(sizeof(struct egroup));
 			if (!eg) {
-- 
2.20.1