https://github.com/torvalds/linux
Tip revision: 8f3d9f354286745c751374f5f1fcafee6b3f3136 authored by Linus Torvalds on 12 April 2020, 19:35:55 UTC
Linux 5.7-rc1
Linux 5.7-rc1
Tip revision: 8f3d9f3
pmu-events.c
// SPDX-License-Identifier: GPL-2.0
#include "parse-events.h"
#include "pmu.h"
#include "tests.h"
#include <errno.h>
#include <stdio.h>
#include <linux/kernel.h>
#include <linux/zalloc.h>
#include "debug.h"
#include "../pmu-events/pmu-events.h"
struct perf_pmu_test_event {
struct pmu_event event;
/* extra events for aliases */
const char *alias_str;
/*
* Note: For when PublicDescription does not exist in the JSON, we
* will have no long_desc in pmu_event.long_desc, but long_desc may
* be set in the alias.
*/
const char *alias_long_desc;
};
static struct perf_pmu_test_event test_cpu_events[] = {
{
.event = {
.name = "bp_l1_btb_correct",
.event = "event=0x8a",
.desc = "L1 BTB Correction",
.topic = "branch",
},
.alias_str = "event=0x8a",
.alias_long_desc = "L1 BTB Correction",
},
{
.event = {
.name = "bp_l2_btb_correct",
.event = "event=0x8b",
.desc = "L2 BTB Correction",
.topic = "branch",
},
.alias_str = "event=0x8b",
.alias_long_desc = "L2 BTB Correction",
},
{
.event = {
.name = "segment_reg_loads.any",
.event = "umask=0x80,period=200000,event=0x6",
.desc = "Number of segment register loads",
.topic = "other",
},
.alias_str = "umask=0x80,(null)=0x30d40,event=0x6",
.alias_long_desc = "Number of segment register loads",
},
{
.event = {
.name = "dispatch_blocked.any",
.event = "umask=0x20,period=200000,event=0x9",
.desc = "Memory cluster signals to block micro-op dispatch for any reason",
.topic = "other",
},
.alias_str = "umask=0x20,(null)=0x30d40,event=0x9",
.alias_long_desc = "Memory cluster signals to block micro-op dispatch for any reason",
},
{
.event = {
.name = "eist_trans",
.event = "umask=0x0,period=200000,event=0x3a",
.desc = "Number of Enhanced Intel SpeedStep(R) Technology (EIST) transitions",
.topic = "other",
},
.alias_str = "umask=0,(null)=0x30d40,event=0x3a",
.alias_long_desc = "Number of Enhanced Intel SpeedStep(R) Technology (EIST) transitions",
},
{ /* sentinel */
.event = {
.name = NULL,
},
},
};
static struct perf_pmu_test_event test_uncore_events[] = {
{
.event = {
.name = "uncore_hisi_ddrc.flux_wcmd",
.event = "event=0x2",
.desc = "DDRC write commands. Unit: hisi_sccl,ddrc ",
.topic = "uncore",
.long_desc = "DDRC write commands",
.pmu = "hisi_sccl,ddrc",
},
.alias_str = "event=0x2",
.alias_long_desc = "DDRC write commands",
},
{
.event = {
.name = "unc_cbo_xsnp_response.miss_eviction",
.event = "umask=0x81,event=0x22",
.desc = "Unit: uncore_cbox A cross-core snoop resulted from L3 Eviction which misses in some processor core",
.topic = "uncore",
.long_desc = "A cross-core snoop resulted from L3 Eviction which misses in some processor core",
.pmu = "uncore_cbox",
},
.alias_str = "umask=0x81,event=0x22",
.alias_long_desc = "A cross-core snoop resulted from L3 Eviction which misses in some processor core",
},
{ /* sentinel */
.event = {
.name = NULL,
},
}
};
const int total_test_events_size = ARRAY_SIZE(test_uncore_events);
static bool is_same(const char *reference, const char *test)
{
if (!reference && !test)
return true;
if (reference && !test)
return false;
if (!reference && test)
return false;
return !strcmp(reference, test);
}
static struct pmu_events_map *__test_pmu_get_events_map(void)
{
struct pmu_events_map *map;
for (map = &pmu_events_map[0]; map->cpuid; map++) {
if (!strcmp(map->cpuid, "testcpu"))
return map;
}
pr_err("could not find test events map\n");
return NULL;
}
/* Verify generated events from pmu-events.c is as expected */
static int __test_pmu_event_table(void)
{
struct pmu_events_map *map = __test_pmu_get_events_map();
struct pmu_event *table;
int map_events = 0, expected_events;
/* ignore 2x sentinels */
expected_events = ARRAY_SIZE(test_cpu_events) +
ARRAY_SIZE(test_uncore_events) - 2;
if (!map)
return -1;
for (table = map->table; table->name; table++) {
struct perf_pmu_test_event *test;
struct pmu_event *te;
bool found = false;
if (table->pmu)
test = &test_uncore_events[0];
else
test = &test_cpu_events[0];
te = &test->event;
for (; te->name; test++, te = &test->event) {
if (strcmp(table->name, te->name))
continue;
found = true;
map_events++;
if (!is_same(table->desc, te->desc)) {
pr_debug2("testing event table %s: mismatched desc, %s vs %s\n",
table->name, table->desc, te->desc);
return -1;
}
if (!is_same(table->topic, te->topic)) {
pr_debug2("testing event table %s: mismatched topic, %s vs %s\n",
table->name, table->topic,
te->topic);
return -1;
}
if (!is_same(table->long_desc, te->long_desc)) {
pr_debug2("testing event table %s: mismatched long_desc, %s vs %s\n",
table->name, table->long_desc,
te->long_desc);
return -1;
}
if (!is_same(table->unit, te->unit)) {
pr_debug2("testing event table %s: mismatched unit, %s vs %s\n",
table->name, table->unit,
te->unit);
return -1;
}
if (!is_same(table->perpkg, te->perpkg)) {
pr_debug2("testing event table %s: mismatched perpkg, %s vs %s\n",
table->name, table->perpkg,
te->perpkg);
return -1;
}
if (!is_same(table->metric_expr, te->metric_expr)) {
pr_debug2("testing event table %s: mismatched metric_expr, %s vs %s\n",
table->name, table->metric_expr,
te->metric_expr);
return -1;
}
if (!is_same(table->metric_name, te->metric_name)) {
pr_debug2("testing event table %s: mismatched metric_name, %s vs %s\n",
table->name, table->metric_name,
te->metric_name);
return -1;
}
if (!is_same(table->deprecated, te->deprecated)) {
pr_debug2("testing event table %s: mismatched deprecated, %s vs %s\n",
table->name, table->deprecated,
te->deprecated);
return -1;
}
pr_debug("testing event table %s: pass\n", table->name);
}
if (!found) {
pr_err("testing event table: could not find event %s\n",
table->name);
return -1;
}
}
if (map_events != expected_events) {
pr_err("testing event table: found %d, but expected %d\n",
map_events, expected_events);
return -1;
}
return 0;
}
static struct perf_pmu_alias *find_alias(const char *test_event, struct list_head *aliases)
{
struct perf_pmu_alias *alias;
list_for_each_entry(alias, aliases, list)
if (!strcmp(test_event, alias->name))
return alias;
return NULL;
}
/* Verify aliases are as expected */
static int __test__pmu_event_aliases(char *pmu_name, int *count)
{
struct perf_pmu_test_event *test;
struct pmu_event *te;
struct perf_pmu *pmu;
LIST_HEAD(aliases);
int res = 0;
bool use_uncore_table;
struct pmu_events_map *map = __test_pmu_get_events_map();
if (!map)
return -1;
if (is_pmu_core(pmu_name)) {
test = &test_cpu_events[0];
use_uncore_table = false;
} else {
test = &test_uncore_events[0];
use_uncore_table = true;
}
pmu = zalloc(sizeof(*pmu));
if (!pmu)
return -1;
pmu->name = pmu_name;
pmu_add_cpu_aliases_map(&aliases, pmu, map);
for (te = &test->event; te->name; test++, te = &test->event) {
struct perf_pmu_alias *alias = find_alias(te->name, &aliases);
if (!alias) {
bool uncore_match = pmu_uncore_alias_match(pmu_name,
te->pmu);
if (use_uncore_table && !uncore_match) {
pr_debug3("testing aliases PMU %s: skip matching alias %s\n",
pmu_name, te->name);
continue;
}
pr_debug2("testing aliases PMU %s: no alias, alias_table->name=%s\n",
pmu_name, te->name);
res = -1;
break;
}
if (!is_same(alias->desc, te->desc)) {
pr_debug2("testing aliases PMU %s: mismatched desc, %s vs %s\n",
pmu_name, alias->desc, te->desc);
res = -1;
break;
}
if (!is_same(alias->long_desc, test->alias_long_desc)) {
pr_debug2("testing aliases PMU %s: mismatched long_desc, %s vs %s\n",
pmu_name, alias->long_desc,
test->alias_long_desc);
res = -1;
break;
}
if (!is_same(alias->str, test->alias_str)) {
pr_debug2("testing aliases PMU %s: mismatched str, %s vs %s\n",
pmu_name, alias->str, test->alias_str);
res = -1;
break;
}
if (!is_same(alias->topic, te->topic)) {
pr_debug2("testing aliases PMU %s: mismatched topic, %s vs %s\n",
pmu_name, alias->topic, te->topic);
res = -1;
break;
}
(*count)++;
pr_debug2("testing aliases PMU %s: matched event %s\n",
pmu_name, alias->name);
}
free(pmu);
return res;
}
int test__pmu_events(struct test *test __maybe_unused,
int subtest __maybe_unused)
{
struct perf_pmu *pmu = NULL;
if (__test_pmu_event_table())
return -1;
while ((pmu = perf_pmu__scan(pmu)) != NULL) {
int count = 0;
if (list_empty(&pmu->format)) {
pr_debug2("skipping testing PMU %s\n", pmu->name);
continue;
}
if (__test__pmu_event_aliases(pmu->name, &count)) {
pr_debug("testing PMU %s aliases: failed\n", pmu->name);
return -1;
}
if (count == 0)
pr_debug3("testing PMU %s aliases: no events to match\n",
pmu->name);
else
pr_debug("testing PMU %s aliases: pass\n", pmu->name);
}
return 0;
}