// SPDX-License-Identifier: GPL-2.0 #include #include #include #include #include "metricgroup.h" #include "tests.h" #include "pmu-events/pmu-events.h" #include "evlist.h" #include "rblist.h" #include "debug.h" #include "expr.h" #include "stat.h" #include "pmu.h" struct value { const char *event; u64 val; }; static u64 find_value(const char *name, struct value *values) { struct value *v = values; while (v->event) { if (!strcmp(name, v->event)) return v->val; v++; } return 0; } static void load_runtime_stat(struct runtime_stat *st, struct evlist *evlist, struct value *vals) { struct evsel *evsel; u64 count; perf_stat__reset_shadow_stats(); 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); } } static double compute_single(struct rblist *metric_events, struct evlist *evlist, struct runtime_stat *st, const char *name) { struct metric_expr *mexp; struct metric_event *me; struct evsel *evsel; evlist__for_each_entry(evlist, evsel) { me = metricgroup__lookup(metric_events, evsel, false); if (me != NULL) { list_for_each_entry (mexp, &me->head, nd) { if (strcmp(mexp->metric_name, name)) continue; return test_generic_metric(mexp, 0, st); } } } return 0.; } static int __compute_metric(const char *name, struct value *vals, const char *name1, double *ratio1, const char *name2, double *ratio2) { struct rblist metric_events = { .nr_entries = 0, }; const struct pmu_event *pme_test; struct perf_cpu_map *cpus; struct runtime_stat st; struct evlist *evlist; int err; /* * We need to prepare evlist for stat mode running on CPU 0 * because that's where all the stats are going to be created. */ evlist = evlist__new(); if (!evlist) return -ENOMEM; cpus = perf_cpu_map__new("0"); if (!cpus) { evlist__delete(evlist); return -ENOMEM; } perf_evlist__set_maps(&evlist->core, cpus, NULL); runtime_stat__init(&st); /* Parse the metric into metric_events list. */ pme_test = find_core_events_table("testarch", "testcpu"); err = metricgroup__parse_groups_test(evlist, pme_test, name, false, false, &metric_events); if (err) goto out; err = evlist__alloc_stats(evlist, false); if (err) goto out; /* Load the runtime stats with given numbers for events. */ load_runtime_stat(&st, evlist, vals); /* And execute the metric */ if (name1 && ratio1) *ratio1 = compute_single(&metric_events, evlist, &st, name1); if (name2 && ratio2) *ratio2 = compute_single(&metric_events, evlist, &st, name2); out: /* ... cleanup. */ metricgroup__rblist_exit(&metric_events); runtime_stat__exit(&st); evlist__free_stats(evlist); perf_cpu_map__put(cpus); evlist__delete(evlist); return err; } static int compute_metric(const char *name, struct value *vals, double *ratio) { return __compute_metric(name, vals, name, ratio, NULL, NULL); } static int compute_metric_group(const char *name, struct value *vals, const char *name1, double *ratio1, const char *name2, double *ratio2) { return __compute_metric(name, vals, name1, ratio1, name2, ratio2); } static int test_ipc(void) { double ratio; struct value vals[] = { { .event = "inst_retired.any", .val = 300 }, { .event = "cpu_clk_unhalted.thread", .val = 200 }, { .event = NULL, }, }; TEST_ASSERT_VAL("failed to compute metric", compute_metric("IPC", vals, &ratio) == 0); TEST_ASSERT_VAL("IPC failed, wrong ratio", ratio == 1.5); return 0; } static int test_frontend(void) { double ratio; struct value vals[] = { { .event = "idq_uops_not_delivered.core", .val = 300 }, { .event = "cpu_clk_unhalted.thread", .val = 200 }, { .event = "cpu_clk_unhalted.one_thread_active", .val = 400 }, { .event = "cpu_clk_unhalted.ref_xclk", .val = 600 }, { .event = NULL, }, }; TEST_ASSERT_VAL("failed to compute metric", compute_metric("Frontend_Bound_SMT", vals, &ratio) == 0); TEST_ASSERT_VAL("Frontend_Bound_SMT failed, wrong ratio", ratio == 0.45); return 0; } static int test_cache_miss_cycles(void) { double ratio; struct value vals[] = { { .event = "l1d-loads-misses", .val = 300 }, { .event = "l1i-loads-misses", .val = 200 }, { .event = "inst_retired.any", .val = 400 }, { .event = NULL, }, }; TEST_ASSERT_VAL("failed to compute metric", compute_metric("cache_miss_cycles", vals, &ratio) == 0); TEST_ASSERT_VAL("cache_miss_cycles failed, wrong ratio", ratio == 1.25); return 0; } /* * DCache_L2_All_Hits = l2_rqsts.demand_data_rd_hit + l2_rqsts.pf_hit + l2_rqsts.rfo_hi * DCache_L2_All_Miss = max(l2_rqsts.all_demand_data_rd - l2_rqsts.demand_data_rd_hit, 0) + * l2_rqsts.pf_miss + l2_rqsts.rfo_miss * DCache_L2_All = dcache_l2_all_hits + dcache_l2_all_miss * DCache_L2_Hits = d_ratio(dcache_l2_all_hits, dcache_l2_all) * DCache_L2_Misses = d_ratio(dcache_l2_all_miss, dcache_l2_all) * * l2_rqsts.demand_data_rd_hit = 100 * l2_rqsts.pf_hit = 200 * l2_rqsts.rfo_hi = 300 * l2_rqsts.all_demand_data_rd = 400 * l2_rqsts.pf_miss = 500 * l2_rqsts.rfo_miss = 600 * * DCache_L2_All_Hits = 600 * DCache_L2_All_Miss = MAX(400 - 100, 0) + 500 + 600 = 1400 * DCache_L2_All = 600 + 1400 = 2000 * DCache_L2_Hits = 600 / 2000 = 0.3 * DCache_L2_Misses = 1400 / 2000 = 0.7 */ static int test_dcache_l2(void) { double ratio; struct value vals[] = { { .event = "l2_rqsts.demand_data_rd_hit", .val = 100 }, { .event = "l2_rqsts.pf_hit", .val = 200 }, { .event = "l2_rqsts.rfo_hit", .val = 300 }, { .event = "l2_rqsts.all_demand_data_rd", .val = 400 }, { .event = "l2_rqsts.pf_miss", .val = 500 }, { .event = "l2_rqsts.rfo_miss", .val = 600 }, { .event = NULL, }, }; TEST_ASSERT_VAL("failed to compute metric", compute_metric("DCache_L2_Hits", vals, &ratio) == 0); TEST_ASSERT_VAL("DCache_L2_Hits failed, wrong ratio", ratio == 0.3); TEST_ASSERT_VAL("failed to compute metric", compute_metric("DCache_L2_Misses", vals, &ratio) == 0); TEST_ASSERT_VAL("DCache_L2_Misses failed, wrong ratio", ratio == 0.7); return 0; } static int test_recursion_fail(void) { double ratio; struct value vals[] = { { .event = "inst_retired.any", .val = 300 }, { .event = "cpu_clk_unhalted.thread", .val = 200 }, { .event = NULL, }, }; TEST_ASSERT_VAL("failed to find recursion", compute_metric("M1", vals, &ratio) == -1); TEST_ASSERT_VAL("failed to find recursion", compute_metric("M3", vals, &ratio) == -1); 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; struct value vals[] = { { .event = "cpu_clk_unhalted.thread", .val = 200 }, { .event = "l1d-loads-misses", .val = 300 }, { .event = "l1i-loads-misses", .val = 200 }, { .event = "inst_retired.any", .val = 400 }, { .event = NULL, }, }; TEST_ASSERT_VAL("failed to find recursion", compute_metric_group("group1", vals, "IPC", &ratio1, "cache_miss_cycles", &ratio2) == 0); TEST_ASSERT_VAL("group IPC failed, wrong ratio", ratio1 == 2.0); TEST_ASSERT_VAL("group cache_miss_cycles failed, wrong ratio", ratio2 == 1.25); return 0; } static int test__parse_metric(struct test_suite *test __maybe_unused, int subtest __maybe_unused) { TEST_ASSERT_VAL("IPC failed", test_ipc() == 0); TEST_ASSERT_VAL("frontend failed", test_frontend() == 0); TEST_ASSERT_VAL("DCache_L2 failed", test_dcache_l2() == 0); TEST_ASSERT_VAL("recursion fail failed", test_recursion_fail() == 0); TEST_ASSERT_VAL("Memory bandwidth", test_memory_bandwidth() == 0); if (!perf_pmu__has_hybrid()) { TEST_ASSERT_VAL("cache_miss_cycles failed", test_cache_miss_cycles() == 0); TEST_ASSERT_VAL("test metric group", test_metric_group() == 0); } return 0; } DEFINE_SUITE("Parse and process metrics", parse_metric);