linux-kernel - [PATCH 13/19] perf metric: Add cache_miss

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Date:   Sun, 19 Jul 2020 20:13:14 +0200
From:   Jiri Olsa <jolsa@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Ian Rogers <irogers@...gle.com>,
        lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Michael Petlan <mpetlan@...hat.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Kajol Jain <kjain@...ux.ibm.com>,
        John Garry <john.garry@...wei.com>,
        "Paul A. Clarke" <pc@...ibm.com>,
        Stephane Eranian <eranian@...gle.com>
Subject: [PATCH 13/19] perf metric: Add cache_miss_cycles to metric parse test

Adding test that compute metric with other metrics in it.

  cache_miss_cycles = metric:dcache_miss_cpi + metric:icache_miss_cycles

Acked-by: Ian Rogers <irogers@...gle.com>
Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 tools/perf/tests/parse-metric.c | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/tools/perf/tests/parse-metric.c b/tools/perf/tests/parse-metric.c
index 8c48251425e1..28f33893338b 100644
--- a/tools/perf/tests/parse-metric.c
+++ b/tools/perf/tests/parse-metric.c
@@ -11,6 +11,8 @@
 #include "debug.h"
 #include "expr.h"
 #include "stat.h"
+#include <perf/cpumap.h>
+#include <perf/evlist.h>
 
 static struct pmu_event pme_test[] = {
 {
@@ -22,6 +24,18 @@ static struct pmu_event pme_test[] = {
 			  "( 1 + cpu_clk_unhalted.one_thread_active / cpu_clk_unhalted.ref_xclk ) )))",
 	.metric_name	= "Frontend_Bound_SMT",
 },
+{
+	.metric_expr	= "l1d\\-loads\\-misses / inst_retired.any",
+	.metric_name	= "dcache_miss_cpi",
+},
+{
+	.metric_expr	= "l1i\\-loads\\-misses / inst_retired.any",
+	.metric_name	= "icache_miss_cycles",
+},
+{
+	.metric_expr	= "(dcache_miss_cpi + icache_miss_cycles)",
+	.metric_name	= "cache_miss_cycles",
+},
 };
 
 static struct pmu_events_map map = {
@@ -162,9 +176,28 @@ static int test_frontend(void)
 	return 0;
 }
 
+static int test_cache_miss_cycles(void)
+{
+	double ratio;
+	struct value vals[] = {
+		{ .event = "l1d-loads-misses",  .val = 300 },
+		{ .event = "l1i-loads-misses",  .val = 200 },
+		{ .event = "inst_retired.any",  .val = 400 },
+		{ 0 },
+	};
+
+	TEST_ASSERT_VAL("failed to compute metric",
+			compute_metric("cache_miss_cycles", vals, &ratio) == 0);
+
+	TEST_ASSERT_VAL("cache_miss_cycles failed, wrong ratio",
+			ratio == 1.25);
+	return 0;
+}
+
 int test__parse_metric(struct test *test __maybe_unused, int subtest __maybe_unused)
 {
 	TEST_ASSERT_VAL("IPC failed", test_ipc() == 0);
 	TEST_ASSERT_VAL("frontend failed", test_frontend() == 0);
+	TEST_ASSERT_VAL("cache_miss_cycles failed", test_cache_miss_cycles() == 0);
 	return 0;
 }
-- 
2.25.4