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- // SPDX-License-Identifier: GPL-2.0
- #include <linux/compiler.h>
- #include <string.h>
- #include <perf/cpumap.h>
- #include <perf/evlist.h>
- #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"
- static struct pmu_event pme_test[] = {
- {
- .metric_expr = "inst_retired.any / cpu_clk_unhalted.thread",
- .metric_name = "IPC",
- .metric_group = "group1",
- },
- {
- .metric_expr = "idq_uops_not_delivered.core / (4 * (( ( cpu_clk_unhalted.thread / 2 ) * "
- "( 1 + cpu_clk_unhalted.one_thread_active / cpu_clk_unhalted.ref_xclk ) )))",
- .metric_name = "Frontend_Bound_SMT",
- },
- {
- .metric_expr = "l1d\\-loads\\-misses / inst_retired.any",
- .metric_name = "dcache_miss_cpi",
- },
- {
- .metric_expr = "l1i\\-loads\\-misses / inst_retired.any",
- .metric_name = "icache_miss_cycles",
- },
- {
- .metric_expr = "(dcache_miss_cpi + icache_miss_cycles)",
- .metric_name = "cache_miss_cycles",
- .metric_group = "group1",
- },
- {
- .metric_expr = "l2_rqsts.demand_data_rd_hit + l2_rqsts.pf_hit + l2_rqsts.rfo_hit",
- .metric_name = "DCache_L2_All_Hits",
- },
- {
- .metric_expr = "max(l2_rqsts.all_demand_data_rd - l2_rqsts.demand_data_rd_hit, 0) + "
- "l2_rqsts.pf_miss + l2_rqsts.rfo_miss",
- .metric_name = "DCache_L2_All_Miss",
- },
- {
- .metric_expr = "dcache_l2_all_hits + dcache_l2_all_miss",
- .metric_name = "DCache_L2_All",
- },
- {
- .metric_expr = "d_ratio(dcache_l2_all_hits, dcache_l2_all)",
- .metric_name = "DCache_L2_Hits",
- },
- {
- .metric_expr = "d_ratio(dcache_l2_all_miss, dcache_l2_all)",
- .metric_name = "DCache_L2_Misses",
- },
- {
- .metric_expr = "ipc + m2",
- .metric_name = "M1",
- },
- {
- .metric_expr = "ipc + m1",
- .metric_name = "M2",
- },
- {
- .metric_expr = "1/m3",
- .metric_name = "M3",
- },
- {
- .name = NULL,
- }
- };
- static struct pmu_events_map map = {
- .cpuid = "test",
- .version = "1",
- .type = "core",
- .table = pme_test,
- };
- 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;
- evlist__for_each_entry(evlist, evsel) {
- count = find_value(evsel->name, vals);
- perf_stat__update_shadow_stats(evsel, count, 0, st);
- }
- }
- 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,
- };
- 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. */
- err = metricgroup__parse_groups_test(evlist, &map, name,
- false, false,
- &metric_events);
- if (err)
- goto out;
- err = perf_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:
- /* ... clenup. */
- metricgroup__rblist_exit(&metric_events);
- runtime_stat__exit(&st);
- perf_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_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;
- }
- int test__parse_metric(struct test *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("cache_miss_cycles failed", test_cache_miss_cycles() == 0);
- 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);
- return 0;
- }
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