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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_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",
},
};
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)
{
struct evsel *evsel = evlist__first(evlist);
struct metric_event *me;
me = metricgroup__lookup(metric_events, evsel, false);
if (me != NULL) {
struct metric_expr *mexp;
mexp = list_first_entry(&me->head, struct metric_expr, nd);
return test_generic_metric(mexp, 0, st);
}
return 0.;
}
static int compute_metric(const char *name, struct value *vals, double *ratio)
{
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)
return -ENOMEM;
perf_evlist__set_maps(&evlist->core, cpus, NULL);
/* Parse the metric into metric_events list. */
err = metricgroup__parse_groups_test(evlist, &map, name,
false, false,
&metric_events);
TEST_ASSERT_VAL("failed to parse metric", err == 0);
if (perf_evlist__alloc_stats(evlist, false))
return -1;
/* Load the runtime stats with given numbers for events. */
runtime_stat__init(&st);
load_runtime_stat(&st, evlist, vals);
/* And execute the metric */
*ratio = compute_single(&metric_events, evlist, &st);
/* ... clenup. */
metricgroup__rblist_exit(&metric_events);
runtime_stat__exit(&st);
perf_evlist__free_stats(evlist);
perf_cpu_map__put(cpus);
evlist__delete(evlist);
return 0;
}
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;
}
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);
return 0;
}
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