[Linuxarm] Re: [PATCH] perf test: Add parse-metric memory bandwidth testcase

On Mon, Jan 25, 2021 at 4:52 AM John Garry john.garry@huawei.com wrote:

Event duration_time in a metric expression requires special handling.

Improve test coverage by including a metric whose expression includes duration_time. The actual metric is a copied from the L1D_Cache_Fill_BW metric on my broadwell machine.

Signed-off-by: John Garry john.garry@huawei.com

Acked-by: Ian Rogers irogers@google.com

Thanks!

---

Based on acme perf/core + "perf metricgroup: Fix for metrics containing duration_time"

diff --git a/tools/perf/tests/parse-metric.c b/tools/perf/tests/parse-metric.c index ce7be37f0d88..6dc1db1626ad 100644 --- a/tools/perf/tests/parse-metric.c +++ b/tools/perf/tests/parse-metric.c @@ -69,6 +69,10 @@ static struct pmu_event pme_test[] = { .metric_expr = "1/m3", .metric_name = "M3", }, +{

•   .metric_expr    = "64 * l1d.replacement / 1000000000 /
  

duration_time",

•   .metric_name    = "L1D_Cache_Fill_BW",
  

+}, { .name = NULL, } @@ -107,6 +111,8 @@ static void load_runtime_stat(struct runtime_stat *st, struct evlist *evlist, evlist__for_each_entry(evlist, evsel) { count = find_value(evsel->name, vals); perf_stat__update_shadow_stats(evsel, count, 0, st);

•           if (!strcmp(evsel->name, "duration_time"))
  

•                   update_stats(&walltime_nsecs_stats, count);
    }
  

}

@@ -321,6 +327,23 @@ static int test_recursion_fail(void) return 0; }

+static int test_memory_bandwidth(void) +{

•   double ratio;
  

•   struct value vals[] = {
  

•           { .event = "l1d.replacement", .val = 4000000 },
  

•           { .event = "duration_time",  .val = 200000000 },
  

•           { .event = NULL, },
  

•   };
  

•   TEST_ASSERT_VAL("failed to compute metric",
  

•                   compute_metric("L1D_Cache_Fill_BW", vals, &ratio)
  

== 0);

•   TEST_ASSERT_VAL("L1D_Cache_Fill_BW, wrong ratio",
  

•                   1.28 == ratio);
  

•   return 0;
  

+}

static int test_metric_group(void) { double ratio1, ratio2; @@ -353,5 +376,6 @@ int test__parse_metric(struct test *test __maybe_unused, int subtest __maybe_unu TEST_ASSERT_VAL("DCache_L2 failed", test_dcache_l2() == 0); TEST_ASSERT_VAL("recursion fail failed", test_recursion_fail() == 0); TEST_ASSERT_VAL("test metric group", test_metric_group() == 0);

•   TEST_ASSERT_VAL("Memory bandwidth", test_memory_bandwidth() == 0);
    return 0;
  

}

2.26.2