Quelle  hybrid.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0
#include "arch-tests.h"
#include "debug.h"
#include "evlist.h"
#include "evsel.h"
#include "pmu.h"
#include "pmus.h"
#include "tests/tests.h"

static bool test_config(const struct evsel *evsel, __u64 expected_config)
{
 return (evsel->core.attr.config & PERF_HW_EVENT_MASK) == expected_config;
}

static bool test_perf_config(const struct perf_evsel *evsel, __u64 expected_config)
{
 return (evsel->attr.config & PERF_HW_EVENT_MASK) == expected_config;
}

static bool test_hybrid_type(const struct evsel *evsel, __u64 expected_config)
{
 return (evsel->core.attr.config >> PERF_PMU_TYPE_SHIFT) == expected_config;
}

static int test__hybrid_hw_event_with_pmu(struct evlist *evlist)
{
 struct evsel *evsel = evlist__first(evlist);

 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->core.nr_entries);
 TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->core.attr.type);
 TEST_ASSERT_VAL("wrong hybrid type", test_hybrid_type(evsel, PERF_TYPE_RAW));
 TEST_ASSERT_VAL("wrong config", test_config(evsel, PERF_COUNT_HW_CPU_CYCLES));
 return TEST_OK;
}

static int test__hybrid_hw_group_event(struct evlist *evlist)
{
 struct evsel *evsel, *leader;

 evsel = leader = evlist__first(evlist);
 TEST_ASSERT_VAL("wrong number of entries", 2 == evlist->core.nr_entries);
 TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->core.attr.type);
 TEST_ASSERT_VAL("wrong hybrid type", test_hybrid_type(evsel, PERF_TYPE_RAW));
 TEST_ASSERT_VAL("wrong config", test_config(evsel, PERF_COUNT_HW_CPU_CYCLES));
 TEST_ASSERT_VAL("wrong leader", evsel__has_leader(evsel, leader));

 evsel = evsel__next(evsel);
 TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->core.attr.type);
 TEST_ASSERT_VAL("wrong hybrid type", test_hybrid_type(evsel, PERF_TYPE_RAW));
 TEST_ASSERT_VAL("wrong config", test_config(evsel, PERF_COUNT_HW_BRANCH_INSTRUCTIONS));
 TEST_ASSERT_VAL("wrong leader", evsel__has_leader(evsel, leader));
 return TEST_OK;
}

static int test__hybrid_sw_hw_group_event(struct evlist *evlist)
{
 struct evsel *evsel, *leader;

 evsel = leader = evlist__first(evlist);
 TEST_ASSERT_VAL("wrong number of entries", 2 == evlist->core.nr_entries);
 TEST_ASSERT_VAL("wrong type", PERF_TYPE_SOFTWARE == evsel->core.attr.type);
 TEST_ASSERT_VAL("wrong leader", evsel__has_leader(evsel, leader));

 evsel = evsel__next(evsel);
 TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->core.attr.type);
 TEST_ASSERT_VAL("wrong hybrid type", test_hybrid_type(evsel, PERF_TYPE_RAW));
 TEST_ASSERT_VAL("wrong config", test_config(evsel, PERF_COUNT_HW_CPU_CYCLES));
 TEST_ASSERT_VAL("wrong leader", evsel__has_leader(evsel, leader));
 return TEST_OK;
}

static int test__hybrid_hw_sw_group_event(struct evlist *evlist)
{
 struct evsel *evsel, *leader;

 evsel = leader = evlist__first(evlist);
 TEST_ASSERT_VAL("wrong number of entries", 2 == evlist->core.nr_entries);
 TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->core.attr.type);
 TEST_ASSERT_VAL("wrong hybrid type", test_hybrid_type(evsel, PERF_TYPE_RAW));
 TEST_ASSERT_VAL("wrong config", test_config(evsel, PERF_COUNT_HW_CPU_CYCLES));
 TEST_ASSERT_VAL("wrong leader", evsel__has_leader(evsel, leader));

 evsel = evsel__next(evsel);
 TEST_ASSERT_VAL("wrong type", PERF_TYPE_SOFTWARE == evsel->core.attr.type);
 TEST_ASSERT_VAL("wrong leader", evsel__has_leader(evsel, leader));
 return TEST_OK;
}

static int test__hybrid_group_modifier1(struct evlist *evlist)
{
 struct evsel *evsel, *leader;

 evsel = leader = evlist__first(evlist);
 TEST_ASSERT_VAL("wrong number of entries", 2 == evlist->core.nr_entries);
 TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->core.attr.type);
 TEST_ASSERT_VAL("wrong hybrid type", test_hybrid_type(evsel, PERF_TYPE_RAW));
 TEST_ASSERT_VAL("wrong config", test_config(evsel, PERF_COUNT_HW_CPU_CYCLES));
 TEST_ASSERT_VAL("wrong leader", evsel__has_leader(evsel, leader));
 TEST_ASSERT_VAL("wrong exclude_user", evsel->core.attr.exclude_user);
 TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->core.attr.exclude_kernel);

 evsel = evsel__next(evsel);
 TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->core.attr.type);
 TEST_ASSERT_VAL("wrong hybrid type", test_hybrid_type(evsel, PERF_TYPE_RAW));
 TEST_ASSERT_VAL("wrong config", test_config(evsel, PERF_COUNT_HW_BRANCH_INSTRUCTIONS));
 TEST_ASSERT_VAL("wrong leader", evsel__has_leader(evsel, leader));
 TEST_ASSERT_VAL("wrong exclude_user", !evsel->core.attr.exclude_user);
 TEST_ASSERT_VAL("wrong exclude_kernel", evsel->core.attr.exclude_kernel);
 return TEST_OK;
}

static int test__hybrid_raw1(struct evlist *evlist)
{
 struct perf_evsel *evsel;

 perf_evlist__for_each_evsel(&evlist->core, evsel) {
  struct perf_pmu *pmu = perf_pmus__find_by_type(evsel->attr.type);

  TEST_ASSERT_VAL("missing pmu", pmu);
  TEST_ASSERT_VAL("unexpected pmu", !strncmp(pmu->name, "cpu_", 4));
  TEST_ASSERT_VAL("wrong config", test_perf_config(evsel, 0x1a));
 }
 return TEST_OK;
}

static int test__hybrid_raw2(struct evlist *evlist)
{
 struct evsel *evsel = evlist__first(evlist);

 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->core.nr_entries);
 TEST_ASSERT_VAL("wrong type", PERF_TYPE_RAW == evsel->core.attr.type);
 TEST_ASSERT_VAL("wrong config", test_config(evsel, 0x1a));
 return TEST_OK;
}

static int test__hybrid_cache_event(struct evlist *evlist)
{
 struct evsel *evsel = evlist__first(evlist);

 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->core.nr_entries);
 TEST_ASSERT_VAL("wrong type", PERF_TYPE_HW_CACHE == evsel->core.attr.type);
 TEST_ASSERT_VAL("wrong config", 0x2 == (evsel->core.attr.config & 0xffffffff));
 return TEST_OK;
}

static int test__checkevent_pmu(struct evlist *evlist)
{

 struct evsel *evsel = evlist__first(evlist);

 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->core.nr_entries);
 TEST_ASSERT_VAL("wrong type", PERF_TYPE_RAW == evsel->core.attr.type);
 TEST_ASSERT_VAL("wrong config",    10 == evsel->core.attr.config);
 TEST_ASSERT_VAL("wrong config1",    1 == evsel->core.attr.config1);
 TEST_ASSERT_VAL("wrong config2",    3 == evsel->core.attr.config2);
 TEST_ASSERT_VAL("wrong config3",    0 == evsel->core.attr.config3);
 /*
 * The period value gets configured within evlist__config,
 * while this test executes only parse events method.
 */
 TEST_ASSERT_VAL("wrong period",     0 == evsel->core.attr.sample_period);

 return TEST_OK;
}

static int test__hybrid_hw_group_event_2(struct evlist *evlist)
{
 struct evsel *evsel, *leader;

 evsel = leader = evlist__first(evlist);
 TEST_ASSERT_VAL("wrong number of entries", 2 == evlist->core.nr_entries);
 TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->core.attr.type);
 TEST_ASSERT_VAL("wrong hybrid type", test_hybrid_type(evsel, PERF_TYPE_RAW));
 TEST_ASSERT_VAL("wrong config", test_config(evsel, PERF_COUNT_HW_CPU_CYCLES));
 TEST_ASSERT_VAL("wrong leader", evsel__has_leader(evsel, leader));

 evsel = evsel__next(evsel);
 TEST_ASSERT_VAL("wrong type", PERF_TYPE_RAW == evsel->core.attr.type);
 TEST_ASSERT_VAL("wrong config", evsel->core.attr.config == 0x3c);
 TEST_ASSERT_VAL("wrong leader", evsel__has_leader(evsel, leader));
 return TEST_OK;
}

struct evlist_test {
 const char *name;
 bool (*valid)(void);
 int (*check)(struct evlist *evlist);
};

static const struct evlist_test test__hybrid_events[] = {
 {
  .name  = "cpu_core/cycles/",
  .check = test__hybrid_hw_event_with_pmu,
  /* 0 */
 },
 {
  .name  = "{cpu_core/cycles/,cpu_core/branches/}",
  .check = test__hybrid_hw_group_event,
  /* 1 */
 },
 {
  .name  = "{cpu-clock,cpu_core/cycles/}",
  .check = test__hybrid_sw_hw_group_event,
  /* 2 */
 },
 {
  .name  = "{cpu_core/cycles/,cpu-clock}",
  .check = test__hybrid_hw_sw_group_event,
  /* 3 */
 },
 {
  .name  = "{cpu_core/cycles/k,cpu_core/branches/u}",
  .check = test__hybrid_group_modifier1,
  /* 4 */
 },
 {
  .name  = "r1a",
  .check = test__hybrid_raw1,
  /* 5 */
 },
 {
  .name  = "cpu_core/r1a/",
  .check = test__hybrid_raw2,
  /* 6 */
 },
 {
  .name  = "cpu_core/config=10,config1,config2=3,period=1000/u",
  .check = test__checkevent_pmu,
  /* 7 */
 },
 {
  .name  = "cpu_core/LLC-loads/",
  .check = test__hybrid_cache_event,
  /* 8 */
 },
 {
  .name  = "{cpu_core/cycles/,cpu_core/cpu-cycles/}",
  .check = test__hybrid_hw_group_event_2,
  /* 9 */
 },
};

static int test_event(const struct evlist_test *e)
{
 struct parse_events_error err;
 struct evlist *evlist;
 int ret;

 if (e->valid && !e->valid()) {
  pr_debug("... SKIP\n");
  return TEST_OK;
 }

 evlist = evlist__new();
 if (evlist == NULL) {
  pr_err("Failed allocation");
  return TEST_FAIL;
 }
 parse_events_error__init(&err);
 ret = parse_events(evlist, e->name, &err);
 if (ret) {
  pr_debug("failed to parse event '%s', err %d\n", e->name, ret);
  parse_events_error__print(&err, e->name);
  ret = TEST_FAIL;
  if (parse_events_error__contains(&err, "can't access trace events"))
   ret = TEST_SKIP;
 } else {
  ret = e->check(evlist);
 }
 parse_events_error__exit(&err);
 evlist__delete(evlist);

 return ret;
}

static int combine_test_results(int existing, int latest)
{
 if (existing == TEST_FAIL)
  return TEST_FAIL;
 if (existing == TEST_SKIP)
  return latest == TEST_OK ? TEST_SKIP : latest;
 return latest;
}

static int test_events(const struct evlist_test *events, int cnt)
{
 int ret = TEST_OK;

 for (int i = 0; i < cnt; i++) {
  const struct evlist_test *e = &events[i];
  int test_ret;

  pr_debug("running test %d '%s'\n", i, e->name);
  test_ret = test_event(e);
  if (test_ret != TEST_OK) {
   pr_debug("Event test failure: test %d '%s'", i, e->name);
   ret = combine_test_results(ret, test_ret);
  }
 }

 return ret;
}

int test__hybrid(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
{
 if (perf_pmus__num_core_pmus() == 1)
  return TEST_SKIP;

 return test_events(test__hybrid_events, ARRAY_SIZE(test__hybrid_events));
}