// 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"
#include "pmus.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 evlist *evlist, struct value *vals)
{
struct evsel *evsel;
u64 count;
evlist__alloc_aggr_stats(evlist, 1);
evlist__for_each_entry(evlist, evsel) {
count = find_value(evsel->name, vals);
evsel->supported = true;
evsel->stats->aggr->counts.val = count;
if (evsel__name_is(evsel, "duration_time"))
update_stats(&walltime_nsecs_stats, count);
}
}
static double compute_single(struct rblist *metric_events, struct evlist *evlist,
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);
}
}
}
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_metrics_table *pme_test;
struct perf_cpu_map *cpus;
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);
/* Parse the metric into metric_events list. */
pme_test = find_core_metrics_table("testarch", "testcpu");
err = metricgroup__parse_groups_test(evlist, pme_test, name,
&metric_events);
if (err)
goto out;
err = evlist__alloc_stats(/*config=*/NULL, evlist, /*alloc_raw=*/false);
if (err)
goto out;
/* Load the runtime stats with given numbers for events. */
load_runtime_stat(evlist, vals);
/* And execute the metric */
if (name1 && ratio1)
*ratio1 = compute_single(&metric_events, evlist, name1);
if (name2 && ratio2)
*ratio2 = compute_single(&metric_events, evlist, name2);
out:
/* ... cleanup. */
metricgroup__rblist_exit(&metric_events);
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);
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);