318 lines
8.4 KiB
C
318 lines
8.4 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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#include <linux/compiler.h>
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#include <string.h>
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#include <perf/cpumap.h>
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#include <perf/evlist.h>
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#include "metricgroup.h"
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#include "tests.h"
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#include "pmu-events/pmu-events.h"
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#include "evlist.h"
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#include "rblist.h"
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#include "debug.h"
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#include "expr.h"
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#include "stat.h"
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#include "pmu.h"
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struct value {
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const char *event;
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u64 val;
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};
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static u64 find_value(const char *name, struct value *values)
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{
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struct value *v = values;
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while (v->event) {
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if (!strcmp(name, v->event))
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return v->val;
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v++;
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}
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return 0;
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}
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static void load_runtime_stat(struct runtime_stat *st, struct evlist *evlist,
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struct value *vals)
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{
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struct evsel *evsel;
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u64 count;
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perf_stat__reset_shadow_stats();
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evlist__for_each_entry(evlist, evsel) {
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count = find_value(evsel->name, vals);
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perf_stat__update_shadow_stats(evsel, count, 0, st);
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if (!strcmp(evsel->name, "duration_time"))
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update_stats(&walltime_nsecs_stats, count);
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}
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}
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static double compute_single(struct rblist *metric_events, struct evlist *evlist,
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struct runtime_stat *st, const char *name)
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{
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struct metric_expr *mexp;
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struct metric_event *me;
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struct evsel *evsel;
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evlist__for_each_entry(evlist, evsel) {
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me = metricgroup__lookup(metric_events, evsel, false);
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if (me != NULL) {
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list_for_each_entry (mexp, &me->head, nd) {
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if (strcmp(mexp->metric_name, name))
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continue;
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return test_generic_metric(mexp, 0, st);
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}
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}
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}
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return 0.;
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}
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static int __compute_metric(const char *name, struct value *vals,
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const char *name1, double *ratio1,
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const char *name2, double *ratio2)
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{
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struct rblist metric_events = {
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.nr_entries = 0,
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};
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const struct pmu_metrics_table *pme_test;
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struct perf_cpu_map *cpus;
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struct runtime_stat st;
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struct evlist *evlist;
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int err;
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/*
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* We need to prepare evlist for stat mode running on CPU 0
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* because that's where all the stats are going to be created.
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*/
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evlist = evlist__new();
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if (!evlist)
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return -ENOMEM;
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cpus = perf_cpu_map__new("0");
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if (!cpus) {
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evlist__delete(evlist);
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return -ENOMEM;
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}
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perf_evlist__set_maps(&evlist->core, cpus, NULL);
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runtime_stat__init(&st);
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/* Parse the metric into metric_events list. */
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pme_test = find_core_metrics_table("testarch", "testcpu");
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err = metricgroup__parse_groups_test(evlist, pme_test, name,
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false, false,
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&metric_events);
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if (err)
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goto out;
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err = evlist__alloc_stats(/*config=*/NULL, evlist, /*alloc_raw=*/false);
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if (err)
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goto out;
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/* Load the runtime stats with given numbers for events. */
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load_runtime_stat(&st, evlist, vals);
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/* And execute the metric */
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if (name1 && ratio1)
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*ratio1 = compute_single(&metric_events, evlist, &st, name1);
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if (name2 && ratio2)
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*ratio2 = compute_single(&metric_events, evlist, &st, name2);
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out:
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/* ... cleanup. */
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metricgroup__rblist_exit(&metric_events);
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runtime_stat__exit(&st);
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evlist__free_stats(evlist);
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perf_cpu_map__put(cpus);
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evlist__delete(evlist);
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return err;
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}
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static int compute_metric(const char *name, struct value *vals, double *ratio)
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{
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return __compute_metric(name, vals, name, ratio, NULL, NULL);
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}
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static int compute_metric_group(const char *name, struct value *vals,
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const char *name1, double *ratio1,
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const char *name2, double *ratio2)
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{
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return __compute_metric(name, vals, name1, ratio1, name2, ratio2);
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}
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static int test_ipc(void)
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{
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double ratio;
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struct value vals[] = {
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{ .event = "inst_retired.any", .val = 300 },
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{ .event = "cpu_clk_unhalted.thread", .val = 200 },
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{ .event = NULL, },
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};
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TEST_ASSERT_VAL("failed to compute metric",
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compute_metric("IPC", vals, &ratio) == 0);
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TEST_ASSERT_VAL("IPC failed, wrong ratio",
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ratio == 1.5);
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return 0;
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}
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static int test_frontend(void)
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{
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double ratio;
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struct value vals[] = {
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{ .event = "idq_uops_not_delivered.core", .val = 300 },
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{ .event = "cpu_clk_unhalted.thread", .val = 200 },
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{ .event = "cpu_clk_unhalted.one_thread_active", .val = 400 },
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{ .event = "cpu_clk_unhalted.ref_xclk", .val = 600 },
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{ .event = NULL, },
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};
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TEST_ASSERT_VAL("failed to compute metric",
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compute_metric("Frontend_Bound_SMT", vals, &ratio) == 0);
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TEST_ASSERT_VAL("Frontend_Bound_SMT failed, wrong ratio",
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ratio == 0.45);
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return 0;
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}
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static int test_cache_miss_cycles(void)
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{
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double ratio;
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struct value vals[] = {
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{ .event = "l1d-loads-misses", .val = 300 },
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{ .event = "l1i-loads-misses", .val = 200 },
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{ .event = "inst_retired.any", .val = 400 },
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{ .event = NULL, },
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};
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TEST_ASSERT_VAL("failed to compute metric",
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compute_metric("cache_miss_cycles", vals, &ratio) == 0);
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TEST_ASSERT_VAL("cache_miss_cycles failed, wrong ratio",
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ratio == 1.25);
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return 0;
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}
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/*
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* DCache_L2_All_Hits = l2_rqsts.demand_data_rd_hit + l2_rqsts.pf_hit + l2_rqsts.rfo_hi
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* DCache_L2_All_Miss = max(l2_rqsts.all_demand_data_rd - l2_rqsts.demand_data_rd_hit, 0) +
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* l2_rqsts.pf_miss + l2_rqsts.rfo_miss
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* DCache_L2_All = dcache_l2_all_hits + dcache_l2_all_miss
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* DCache_L2_Hits = d_ratio(dcache_l2_all_hits, dcache_l2_all)
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* DCache_L2_Misses = d_ratio(dcache_l2_all_miss, dcache_l2_all)
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*
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* l2_rqsts.demand_data_rd_hit = 100
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* l2_rqsts.pf_hit = 200
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* l2_rqsts.rfo_hi = 300
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* l2_rqsts.all_demand_data_rd = 400
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* l2_rqsts.pf_miss = 500
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* l2_rqsts.rfo_miss = 600
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*
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* DCache_L2_All_Hits = 600
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* DCache_L2_All_Miss = MAX(400 - 100, 0) + 500 + 600 = 1400
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* DCache_L2_All = 600 + 1400 = 2000
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* DCache_L2_Hits = 600 / 2000 = 0.3
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* DCache_L2_Misses = 1400 / 2000 = 0.7
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*/
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static int test_dcache_l2(void)
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{
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double ratio;
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struct value vals[] = {
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{ .event = "l2_rqsts.demand_data_rd_hit", .val = 100 },
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{ .event = "l2_rqsts.pf_hit", .val = 200 },
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{ .event = "l2_rqsts.rfo_hit", .val = 300 },
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{ .event = "l2_rqsts.all_demand_data_rd", .val = 400 },
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{ .event = "l2_rqsts.pf_miss", .val = 500 },
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{ .event = "l2_rqsts.rfo_miss", .val = 600 },
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{ .event = NULL, },
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};
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TEST_ASSERT_VAL("failed to compute metric",
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compute_metric("DCache_L2_Hits", vals, &ratio) == 0);
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TEST_ASSERT_VAL("DCache_L2_Hits failed, wrong ratio",
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ratio == 0.3);
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TEST_ASSERT_VAL("failed to compute metric",
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compute_metric("DCache_L2_Misses", vals, &ratio) == 0);
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TEST_ASSERT_VAL("DCache_L2_Misses failed, wrong ratio",
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ratio == 0.7);
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return 0;
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}
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static int test_recursion_fail(void)
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{
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double ratio;
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struct value vals[] = {
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{ .event = "inst_retired.any", .val = 300 },
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{ .event = "cpu_clk_unhalted.thread", .val = 200 },
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{ .event = NULL, },
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};
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TEST_ASSERT_VAL("failed to find recursion",
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compute_metric("M1", vals, &ratio) == -1);
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TEST_ASSERT_VAL("failed to find recursion",
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compute_metric("M3", vals, &ratio) == -1);
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return 0;
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}
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static int test_memory_bandwidth(void)
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{
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double ratio;
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struct value vals[] = {
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{ .event = "l1d.replacement", .val = 4000000 },
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{ .event = "duration_time", .val = 200000000 },
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{ .event = NULL, },
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};
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TEST_ASSERT_VAL("failed to compute metric",
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compute_metric("L1D_Cache_Fill_BW", vals, &ratio) == 0);
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TEST_ASSERT_VAL("L1D_Cache_Fill_BW, wrong ratio",
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1.28 == ratio);
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return 0;
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}
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static int test_metric_group(void)
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{
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double ratio1, ratio2;
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struct value vals[] = {
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{ .event = "cpu_clk_unhalted.thread", .val = 200 },
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{ .event = "l1d-loads-misses", .val = 300 },
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{ .event = "l1i-loads-misses", .val = 200 },
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{ .event = "inst_retired.any", .val = 400 },
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{ .event = NULL, },
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};
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TEST_ASSERT_VAL("failed to find recursion",
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compute_metric_group("group1", vals,
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"IPC", &ratio1,
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"cache_miss_cycles", &ratio2) == 0);
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TEST_ASSERT_VAL("group IPC failed, wrong ratio",
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ratio1 == 2.0);
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TEST_ASSERT_VAL("group cache_miss_cycles failed, wrong ratio",
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ratio2 == 1.25);
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return 0;
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}
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static int test__parse_metric(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
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{
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TEST_ASSERT_VAL("IPC failed", test_ipc() == 0);
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TEST_ASSERT_VAL("frontend failed", test_frontend() == 0);
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TEST_ASSERT_VAL("DCache_L2 failed", test_dcache_l2() == 0);
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TEST_ASSERT_VAL("recursion fail failed", test_recursion_fail() == 0);
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TEST_ASSERT_VAL("Memory bandwidth", test_memory_bandwidth() == 0);
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if (!perf_pmu__has_hybrid()) {
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TEST_ASSERT_VAL("cache_miss_cycles failed", test_cache_miss_cycles() == 0);
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TEST_ASSERT_VAL("test metric group", test_metric_group() == 0);
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}
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return 0;
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}
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DEFINE_SUITE("Parse and process metrics", parse_metric);
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