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perf test: Add parse-metric memory bandwidth testcase 

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>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: linuxarm@openeuler.org
Link: http://lore.kernel.org/lkml/1611578842-5749-1-git-send-email-john.garry@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
John Garry 2021-01-25 20:47:22 +08:00 committed by Arnaldo Carvalho de Melo
parent 70f0ba9f24
commit 7efce5c240
1 changed files with 24 additions and 0 deletions
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24
tools/perf/tests/parse-metric.c
View File

@ -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;
}