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authorJiri Olsa <jolsa@kernel.org>2020-06-03 12:51:15 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2020-06-22 16:28:08 -0300
commite1c92a7fbbc5668510736624df3028accd6af0ea (patch)
treed8c337ef0adc2a6585dce8322d756ed160b621ed /tools/perf
parente46fc8d9dd352c88fec49b140008958d2dc1efe1 (diff)
perf tests: Add another metric parsing test
The test goes through all metrics compiled for arch within pmu events and try to parse them. This test is different from 'test_parsing' in that we go through all the events in the current arch, not just one defined for current CPU model. Using 'fake_pmu' to parse events which do not have PMUs defined in the system. Say there's bad change in ivybridge metrics file, like: - a/tools/perf/pmu-events/arch/x86/ivybridge/ivb-metrics.json + b/tools/perf/pmu-events/arch/x86/ivybridge/ivb-metrics.json @@ -8,7 +8,7 @@ - "MetricExpr": "IDQ_UOPS_NOT_DELIVERED.CORE / (4 * (( + "MetricExpr": "IDQ_UOPS_NOT_DELIVERED.CORE / / (4 * the test fails with (on my kabylake laptop): $ perf test 'Parsing of PMU event table metrics with fake PMUs' -v parsing 'idq_uops_not_delivered.core / / (4 * (( ( cpu_clk_unh... syntax error, line 1 expr__parse failed test child finished with -1 ... The test also defines its own list of metrics and tries to parse them. It's handy for developing. Committer notes: Testing it: $ perf test fake 10: PMU events : 10.4: Parsing of PMU event table metrics with fake PMUs : FAILED! $ perf test -v fake |& tail parsing '(unc_p_freq_trans_cycles / unc_p_clockticks) * 100.' parsing '(unc_m_power_channel_ppd / unc_m_clockticks) * 100.' parsing '(unc_m_power_critical_throttle_cycles / unc_m_clockticks) * 100.' parsing '(unc_m_power_self_refresh / unc_m_clockticks) * 100.' parsing 'idq_uops_not_delivered.core / * (4 * cycles)' syntax error expr__parse failed test child finished with -1 ---- end ---- PMU events subtest 4: FAILED! $ And fix this error: tests/pmu-events.c:437:40: error: missing field 'idx' initializer [-Werror,-Wmissing-field-initializers] struct parse_events_error error = { 0 }; Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lore.kernel.org/lkml/20200602214741.1218986-5-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
-rw-r--r--tools/perf/tests/pmu-events.c117
1 files changed, 114 insertions, 3 deletions
diff --git a/tools/perf/tests/pmu-events.c b/tools/perf/tests/pmu-events.c
index 82fa69a60ec8..b66b021476ec 100644
--- a/tools/perf/tests/pmu-events.c
+++ b/tools/perf/tests/pmu-events.c
@@ -390,7 +390,8 @@ static bool is_number(const char *str)
return errno == 0 && end_ptr != str;
}
-static int check_parse_id(const char *id, struct parse_events_error *error)
+static int check_parse_id(const char *id, struct parse_events_error *error,
+ struct perf_pmu *fake_pmu)
{
struct evlist *evlist;
int ret;
@@ -402,7 +403,7 @@ static int check_parse_id(const char *id, struct parse_events_error *error)
evlist = evlist__new();
if (!evlist)
return -ENOMEM;
- ret = parse_events(evlist, id, error);
+ ret = __parse_events(evlist, id, error, fake_pmu);
evlist__delete(evlist);
return ret;
}
@@ -411,7 +412,7 @@ static int check_parse_cpu(const char *id, bool same_cpu, struct pmu_event *pe)
{
struct parse_events_error error = { .idx = 0, };
- int ret = check_parse_id(id, &error);
+ int ret = check_parse_id(id, &error, NULL);
if (ret && same_cpu) {
pr_warning("Parse event failed metric '%s' id '%s' expr '%s'\n",
pe->metric_name, id, pe->metric_expr);
@@ -429,6 +430,18 @@ static int check_parse_cpu(const char *id, bool same_cpu, struct pmu_event *pe)
return ret;
}
+static int check_parse_fake(const char *id)
+{
+ struct parse_events_error error = { .idx = 0, };
+ int ret = check_parse_id(id, &error, &perf_pmu__fake);
+
+ free(error.str);
+ free(error.help);
+ free(error.first_str);
+ free(error.first_help);
+ return ret;
+}
+
static void expr_failure(const char *msg,
const struct pmu_events_map *map,
const struct pmu_event *pe)
@@ -498,6 +511,100 @@ static int test_parsing(void)
return ret == 0 ? TEST_OK : TEST_SKIP;
}
+struct test_metric {
+ const char *str;
+};
+
+static struct test_metric metrics[] = {
+ { "(unc_p_power_state_occupancy.cores_c0 / unc_p_clockticks) * 100." },
+ { "imx8_ddr0@read\\-cycles@ * 4 * 4", },
+ { "imx8_ddr0@axid\\-read\\,axi_mask\\=0xffff\\,axi_id\\=0x0000@ * 4", },
+ { "(cstate_pkg@c2\\-residency@ / msr@tsc@) * 100", },
+ { "(imx8_ddr0@read\\-cycles@ + imx8_ddr0@write\\-cycles@)", },
+};
+
+static int metric_parse_fake(const char *str)
+{
+ struct expr_parse_ctx ctx;
+ struct hashmap_entry *cur;
+ double result;
+ int ret = -1;
+ size_t bkt;
+ int i;
+
+ pr_debug("parsing '%s'\n", str);
+
+ expr__ctx_init(&ctx);
+ if (expr__find_other(str, NULL, &ctx, 0) < 0) {
+ pr_err("expr__find_other failed\n");
+ return -1;
+ }
+
+ /*
+ * Add all ids with a made up value. The value may
+ * trigger divide by zero when subtracted and so try to
+ * make them unique.
+ */
+ i = 1;
+ hashmap__for_each_entry((&ctx.ids), cur, bkt)
+ expr__add_id(&ctx, strdup(cur->key), i++);
+
+ hashmap__for_each_entry((&ctx.ids), cur, bkt) {
+ if (check_parse_fake(cur->key)) {
+ pr_err("check_parse_fake failed\n");
+ goto out;
+ }
+ }
+
+ if (expr__parse(&result, &ctx, str, 1))
+ pr_err("expr__parse failed\n");
+ else
+ ret = 0;
+
+out:
+ expr__ctx_clear(&ctx);
+ return ret;
+}
+
+/*
+ * Parse all the metrics for current architecture,
+ * or all defined cpus via the 'fake_pmu'
+ * in parse_events.
+ */
+static int test_parsing_fake(void)
+{
+ struct pmu_events_map *map;
+ struct pmu_event *pe;
+ unsigned int i, j;
+ int err = 0;
+
+ for (i = 0; i < ARRAY_SIZE(metrics); i++) {
+ err = metric_parse_fake(metrics[i].str);
+ if (err)
+ return err;
+ }
+
+ i = 0;
+ for (;;) {
+ map = &pmu_events_map[i++];
+ if (!map->table)
+ break;
+ j = 0;
+ for (;;) {
+ pe = &map->table[j++];
+ if (!pe->name && !pe->metric_group && !pe->metric_name)
+ break;
+ if (!pe->metric_expr)
+ continue;
+ err = metric_parse_fake(pe->metric_expr);
+ if (err)
+ return err;
+ }
+ }
+
+ return 0;
+}
+
static const struct {
int (*func)(void);
const char *desc;
@@ -514,6 +621,10 @@ static const struct {
.func = test_parsing,
.desc = "Parsing of PMU event table metrics",
},
+ {
+ .func = test_parsing_fake,
+ .desc = "Parsing of PMU event table metrics with fake PMUs",
+ },
};
const char *test__pmu_events_subtest_get_desc(int subtest)