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perf tests: Add another metric parsing test

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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>
This commit is contained in:
Jiri Olsa 2020-06-03 12:51:15 -03:00 committed by Arnaldo Carvalho de Melo
parent e46fc8d9dd
commit e1c92a7fbb
1 changed files with 114 additions and 3 deletions
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117
tools/perf/tests/pmu-events.c
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@ -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)