https://github.com/torvalds/linux
Tip revision: 4b0986a3613c92f4ec1bdc7f60ec66fea135991f authored by Linus Torvalds on 22 May 2022, 19:52:31 UTC
Linux 5.18
Linux 5.18
Tip revision: 4b0986a
pmu-events.c
// SPDX-License-Identifier: GPL-2.0
#include "math.h"
#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"
#include "util/evlist.h"
#include "util/expr.h"
#include "util/parse-events.h"
#include "metricgroup.h"
struct perf_pmu_test_event {
/* used for matching against events from generated pmu-events.c */
struct pmu_event event;
/* used for matching against event aliases */
/* 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;
/* PMU which we should match against */
const char *matching_pmu;
};
struct perf_pmu_test_pmu {
struct perf_pmu pmu;
struct perf_pmu_test_event const *aliases[10];
};
static const struct perf_pmu_test_event bp_l1_btb_correct = {
.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",
};
static const struct perf_pmu_test_event bp_l2_btb_correct = {
.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",
};
static const struct perf_pmu_test_event segment_reg_loads_any = {
.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,period=0x30d40,event=0x6",
.alias_long_desc = "Number of segment register loads",
};
static const struct perf_pmu_test_event dispatch_blocked_any = {
.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,period=0x30d40,event=0x9",
.alias_long_desc = "Memory cluster signals to block micro-op dispatch for any reason",
};
static const struct perf_pmu_test_event eist_trans = {
.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,period=0x30d40,event=0x3a",
.alias_long_desc = "Number of Enhanced Intel SpeedStep(R) Technology (EIST) transitions",
};
static const struct perf_pmu_test_event l3_cache_rd = {
.event = {
.name = "l3_cache_rd",
.event = "event=0x40",
.desc = "L3 cache access, read",
.long_desc = "Attributable Level 3 cache access, read",
.topic = "cache",
},
.alias_str = "event=0x40",
.alias_long_desc = "Attributable Level 3 cache access, read",
};
static const struct perf_pmu_test_event *core_events[] = {
&bp_l1_btb_correct,
&bp_l2_btb_correct,
&segment_reg_loads_any,
&dispatch_blocked_any,
&eist_trans,
&l3_cache_rd,
NULL
};
static const struct perf_pmu_test_event uncore_hisi_ddrc_flux_wcmd = {
.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",
.matching_pmu = "hisi_sccl1_ddrc2",
};
static const struct perf_pmu_test_event unc_cbo_xsnp_response_miss_eviction = {
.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",
.matching_pmu = "uncore_cbox_0",
};
static const struct perf_pmu_test_event uncore_hyphen = {
.event = {
.name = "event-hyphen",
.event = "umask=0x00,event=0xe0",
.desc = "Unit: uncore_cbox UNC_CBO_HYPHEN",
.topic = "uncore",
.long_desc = "UNC_CBO_HYPHEN",
.pmu = "uncore_cbox",
},
.alias_str = "umask=0,event=0xe0",
.alias_long_desc = "UNC_CBO_HYPHEN",
.matching_pmu = "uncore_cbox_0",
};
static const struct perf_pmu_test_event uncore_two_hyph = {
.event = {
.name = "event-two-hyph",
.event = "umask=0x00,event=0xc0",
.desc = "Unit: uncore_cbox UNC_CBO_TWO_HYPH",
.topic = "uncore",
.long_desc = "UNC_CBO_TWO_HYPH",
.pmu = "uncore_cbox",
},
.alias_str = "umask=0,event=0xc0",
.alias_long_desc = "UNC_CBO_TWO_HYPH",
.matching_pmu = "uncore_cbox_0",
};
static const struct perf_pmu_test_event uncore_hisi_l3c_rd_hit_cpipe = {
.event = {
.name = "uncore_hisi_l3c.rd_hit_cpipe",
.event = "event=0x7",
.desc = "Total read hits. Unit: hisi_sccl,l3c ",
.topic = "uncore",
.long_desc = "Total read hits",
.pmu = "hisi_sccl,l3c",
},
.alias_str = "event=0x7",
.alias_long_desc = "Total read hits",
.matching_pmu = "hisi_sccl3_l3c7",
};
static const struct perf_pmu_test_event uncore_imc_free_running_cache_miss = {
.event = {
.name = "uncore_imc_free_running.cache_miss",
.event = "event=0x12",
.desc = "Total cache misses. Unit: uncore_imc_free_running ",
.topic = "uncore",
.long_desc = "Total cache misses",
.pmu = "uncore_imc_free_running",
},
.alias_str = "event=0x12",
.alias_long_desc = "Total cache misses",
.matching_pmu = "uncore_imc_free_running_0",
};
static const struct perf_pmu_test_event uncore_imc_cache_hits = {
.event = {
.name = "uncore_imc.cache_hits",
.event = "event=0x34",
.desc = "Total cache hits. Unit: uncore_imc ",
.topic = "uncore",
.long_desc = "Total cache hits",
.pmu = "uncore_imc",
},
.alias_str = "event=0x34",
.alias_long_desc = "Total cache hits",
.matching_pmu = "uncore_imc_0",
};
static const struct perf_pmu_test_event *uncore_events[] = {
&uncore_hisi_ddrc_flux_wcmd,
&unc_cbo_xsnp_response_miss_eviction,
&uncore_hyphen,
&uncore_two_hyph,
&uncore_hisi_l3c_rd_hit_cpipe,
&uncore_imc_free_running_cache_miss,
&uncore_imc_cache_hits,
NULL
};
static const struct perf_pmu_test_event sys_ddr_pmu_write_cycles = {
.event = {
.name = "sys_ddr_pmu.write_cycles",
.event = "event=0x2b",
.desc = "ddr write-cycles event. Unit: uncore_sys_ddr_pmu ",
.topic = "uncore",
.pmu = "uncore_sys_ddr_pmu",
.compat = "v8",
},
.alias_str = "event=0x2b",
.alias_long_desc = "ddr write-cycles event. Unit: uncore_sys_ddr_pmu ",
.matching_pmu = "uncore_sys_ddr_pmu",
};
static const struct perf_pmu_test_event sys_ccn_pmu_read_cycles = {
.event = {
.name = "sys_ccn_pmu.read_cycles",
.event = "config=0x2c",
.desc = "ccn read-cycles event. Unit: uncore_sys_ccn_pmu ",
.topic = "uncore",
.pmu = "uncore_sys_ccn_pmu",
.compat = "0x01",
},
.alias_str = "config=0x2c",
.alias_long_desc = "ccn read-cycles event. Unit: uncore_sys_ccn_pmu ",
.matching_pmu = "uncore_sys_ccn_pmu",
};
static const struct perf_pmu_test_event *sys_events[] = {
&sys_ddr_pmu_write_cycles,
&sys_ccn_pmu_read_cycles,
NULL
};
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 const struct pmu_events_map *__test_pmu_get_events_map(void)
{
const 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;
}
static const struct pmu_event *__test_pmu_get_sys_events_table(void)
{
const struct pmu_sys_events *tables = &pmu_sys_event_tables[0];
for ( ; tables->name; tables++) {
if (!strcmp("pme_test_soc_sys", tables->name))
return tables->table;
}
return NULL;
}
static int compare_pmu_events(const struct pmu_event *e1, const struct pmu_event *e2)
{
if (!is_same(e1->name, e2->name)) {
pr_debug2("testing event e1 %s: mismatched name string, %s vs %s\n",
e1->name, e1->name, e2->name);
return -1;
}
if (!is_same(e1->compat, e2->compat)) {
pr_debug2("testing event e1 %s: mismatched compat string, %s vs %s\n",
e1->name, e1->compat, e2->compat);
return -1;
}
if (!is_same(e1->event, e2->event)) {
pr_debug2("testing event e1 %s: mismatched event, %s vs %s\n",
e1->name, e1->event, e2->event);
return -1;
}
if (!is_same(e1->desc, e2->desc)) {
pr_debug2("testing event e1 %s: mismatched desc, %s vs %s\n",
e1->name, e1->desc, e2->desc);
return -1;
}
if (!is_same(e1->topic, e2->topic)) {
pr_debug2("testing event e1 %s: mismatched topic, %s vs %s\n",
e1->name, e1->topic, e2->topic);
return -1;
}
if (!is_same(e1->long_desc, e2->long_desc)) {
pr_debug2("testing event e1 %s: mismatched long_desc, %s vs %s\n",
e1->name, e1->long_desc, e2->long_desc);
return -1;
}
if (!is_same(e1->pmu, e2->pmu)) {
pr_debug2("testing event e1 %s: mismatched pmu string, %s vs %s\n",
e1->name, e1->pmu, e2->pmu);
return -1;
}
if (!is_same(e1->unit, e2->unit)) {
pr_debug2("testing event e1 %s: mismatched unit, %s vs %s\n",
e1->name, e1->unit, e2->unit);
return -1;
}
if (!is_same(e1->perpkg, e2->perpkg)) {
pr_debug2("testing event e1 %s: mismatched perpkg, %s vs %s\n",
e1->name, e1->perpkg, e2->perpkg);
return -1;
}
if (!is_same(e1->aggr_mode, e2->aggr_mode)) {
pr_debug2("testing event e1 %s: mismatched aggr_mode, %s vs %s\n",
e1->name, e1->aggr_mode, e2->aggr_mode);
return -1;
}
if (!is_same(e1->metric_expr, e2->metric_expr)) {
pr_debug2("testing event e1 %s: mismatched metric_expr, %s vs %s\n",
e1->name, e1->metric_expr, e2->metric_expr);
return -1;
}
if (!is_same(e1->metric_name, e2->metric_name)) {
pr_debug2("testing event e1 %s: mismatched metric_name, %s vs %s\n",
e1->name, e1->metric_name, e2->metric_name);
return -1;
}
if (!is_same(e1->metric_group, e2->metric_group)) {
pr_debug2("testing event e1 %s: mismatched metric_group, %s vs %s\n",
e1->name, e1->metric_group, e2->metric_group);
return -1;
}
if (!is_same(e1->deprecated, e2->deprecated)) {
pr_debug2("testing event e1 %s: mismatched deprecated, %s vs %s\n",
e1->name, e1->deprecated, e2->deprecated);
return -1;
}
if (!is_same(e1->metric_constraint, e2->metric_constraint)) {
pr_debug2("testing event e1 %s: mismatched metric_constant, %s vs %s\n",
e1->name, e1->metric_constraint, e2->metric_constraint);
return -1;
}
return 0;
}
static int compare_alias_to_test_event(struct perf_pmu_alias *alias,
struct perf_pmu_test_event const *test_event,
char const *pmu_name)
{
struct pmu_event const *event = &test_event->event;
/* An alias was found, ensure everything is in order */
if (!is_same(alias->name, event->name)) {
pr_debug("testing aliases PMU %s: mismatched name, %s vs %s\n",
pmu_name, alias->name, event->name);
return -1;
}
if (!is_same(alias->desc, event->desc)) {
pr_debug("testing aliases PMU %s: mismatched desc, %s vs %s\n",
pmu_name, alias->desc, event->desc);
return -1;
}
if (!is_same(alias->long_desc, test_event->alias_long_desc)) {
pr_debug("testing aliases PMU %s: mismatched long_desc, %s vs %s\n",
pmu_name, alias->long_desc,
test_event->alias_long_desc);
return -1;
}
if (!is_same(alias->topic, event->topic)) {
pr_debug("testing aliases PMU %s: mismatched topic, %s vs %s\n",
pmu_name, alias->topic, event->topic);
return -1;
}
if (!is_same(alias->str, test_event->alias_str)) {
pr_debug("testing aliases PMU %s: mismatched str, %s vs %s\n",
pmu_name, alias->str, test_event->alias_str);
return -1;
}
if (!is_same(alias->long_desc, test_event->alias_long_desc)) {
pr_debug("testing aliases PMU %s: mismatched long desc, %s vs %s\n",
pmu_name, alias->str, test_event->alias_long_desc);
return -1;
}
if (!is_same(alias->pmu_name, test_event->event.pmu)) {
pr_debug("testing aliases PMU %s: mismatched pmu_name, %s vs %s\n",
pmu_name, alias->pmu_name, test_event->event.pmu);
return -1;
}
return 0;
}
/* Verify generated events from pmu-events.c are as expected */
static int test__pmu_event_table(struct test_suite *test __maybe_unused,
int subtest __maybe_unused)
{
const struct pmu_event *sys_event_tables = __test_pmu_get_sys_events_table();
const struct pmu_events_map *map = __test_pmu_get_events_map();
const struct pmu_event *table;
int map_events = 0, expected_events;
/* ignore 3x sentinels */
expected_events = ARRAY_SIZE(core_events) +
ARRAY_SIZE(uncore_events) +
ARRAY_SIZE(sys_events) - 3;
if (!map || !sys_event_tables)
return -1;
for (table = map->table; table->name; table++) {
struct perf_pmu_test_event const **test_event_table;
bool found = false;
if (table->pmu)
test_event_table = &uncore_events[0];
else
test_event_table = &core_events[0];
for (; *test_event_table; test_event_table++) {
struct perf_pmu_test_event const *test_event = *test_event_table;
struct pmu_event const *event = &test_event->event;
if (strcmp(table->name, event->name))
continue;
found = true;
map_events++;
if (compare_pmu_events(table, event))
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;
}
}
for (table = sys_event_tables; table->name; table++) {
struct perf_pmu_test_event const **test_event_table;
bool found = false;
test_event_table = &sys_events[0];
for (; *test_event_table; test_event_table++) {
struct perf_pmu_test_event const *test_event = *test_event_table;
struct pmu_event const *event = &test_event->event;
if (strcmp(table->name, event->name))
continue;
found = true;
map_events++;
if (compare_pmu_events(table, event))
return -1;
pr_debug("testing sys event table %s: pass\n", table->name);
}
if (!found) {
pr_debug("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_core_pmu_event_aliases(char *pmu_name, int *count)
{
struct perf_pmu_test_event const **test_event_table;
struct perf_pmu *pmu;
LIST_HEAD(aliases);
int res = 0;
const struct pmu_events_map *map = __test_pmu_get_events_map();
struct perf_pmu_alias *a, *tmp;
if (!map)
return -1;
test_event_table = &core_events[0];
pmu = zalloc(sizeof(*pmu));
if (!pmu)
return -1;
pmu->name = pmu_name;
pmu_add_cpu_aliases_map(&aliases, pmu, map);
for (; *test_event_table; test_event_table++) {
struct perf_pmu_test_event const *test_event = *test_event_table;
struct pmu_event const *event = &test_event->event;
struct perf_pmu_alias *alias = find_alias(event->name, &aliases);
if (!alias) {
pr_debug("testing aliases core PMU %s: no alias, alias_table->name=%s\n",
pmu_name, event->name);
res = -1;
break;
}
if (compare_alias_to_test_event(alias, test_event, pmu_name)) {
res = -1;
break;
}
(*count)++;
pr_debug2("testing aliases core PMU %s: matched event %s\n",
pmu_name, alias->name);
}
list_for_each_entry_safe(a, tmp, &aliases, list) {
list_del(&a->list);
perf_pmu_free_alias(a);
}
free(pmu);
return res;
}
static int __test_uncore_pmu_event_aliases(struct perf_pmu_test_pmu *test_pmu)
{
int alias_count = 0, to_match_count = 0, matched_count = 0;
struct perf_pmu_test_event const **table;
struct perf_pmu *pmu = &test_pmu->pmu;
const char *pmu_name = pmu->name;
struct perf_pmu_alias *a, *tmp, *alias;
const struct pmu_events_map *map;
LIST_HEAD(aliases);
int res = 0;
map = __test_pmu_get_events_map();
if (!map)
return -1;
pmu_add_cpu_aliases_map(&aliases, pmu, map);
pmu_add_sys_aliases(&aliases, pmu);
/* Count how many aliases we generated */
list_for_each_entry(alias, &aliases, list)
alias_count++;
/* Count how many aliases we expect from the known table */
for (table = &test_pmu->aliases[0]; *table; table++)
to_match_count++;
if (alias_count != to_match_count) {
pr_debug("testing aliases uncore PMU %s: mismatch expected aliases (%d) vs found (%d)\n",
pmu_name, to_match_count, alias_count);
res = -1;
goto out;
}
list_for_each_entry(alias, &aliases, list) {
bool matched = false;
for (table = &test_pmu->aliases[0]; *table; table++) {
struct perf_pmu_test_event const *test_event = *table;
struct pmu_event const *event = &test_event->event;
if (!strcmp(event->name, alias->name)) {
if (compare_alias_to_test_event(alias,
test_event,
pmu_name)) {
continue;
}
matched = true;
matched_count++;
}
}
if (matched == false) {
pr_debug("testing aliases uncore PMU %s: could not match alias %s\n",
pmu_name, alias->name);
res = -1;
goto out;
}
}
if (alias_count != matched_count) {
pr_debug("testing aliases uncore PMU %s: mismatch found aliases (%d) vs matched (%d)\n",
pmu_name, matched_count, alias_count);
res = -1;
}
out:
list_for_each_entry_safe(a, tmp, &aliases, list) {
list_del(&a->list);
perf_pmu_free_alias(a);
}
return res;
}
static struct perf_pmu_test_pmu test_pmus[] = {
{
.pmu = {
.name = (char *)"hisi_sccl1_ddrc2",
.is_uncore = 1,
},
.aliases = {
&uncore_hisi_ddrc_flux_wcmd,
},
},
{
.pmu = {
.name = (char *)"uncore_cbox_0",
.is_uncore = 1,
},
.aliases = {
&unc_cbo_xsnp_response_miss_eviction,
&uncore_hyphen,
&uncore_two_hyph,
},
},
{
.pmu = {
.name = (char *)"hisi_sccl3_l3c7",
.is_uncore = 1,
},
.aliases = {
&uncore_hisi_l3c_rd_hit_cpipe,
},
},
{
.pmu = {
.name = (char *)"uncore_imc_free_running_0",
.is_uncore = 1,
},
.aliases = {
&uncore_imc_free_running_cache_miss,
},
},
{
.pmu = {
.name = (char *)"uncore_imc_0",
.is_uncore = 1,
},
.aliases = {
&uncore_imc_cache_hits,
},
},
{
.pmu = {
.name = (char *)"uncore_sys_ddr_pmu0",
.is_uncore = 1,
.id = (char *)"v8",
},
.aliases = {
&sys_ddr_pmu_write_cycles,
},
},
{
.pmu = {
.name = (char *)"uncore_sys_ccn_pmu4",
.is_uncore = 1,
.id = (char *)"0x01",
},
.aliases = {
&sys_ccn_pmu_read_cycles,
},
},
};
/* Test that aliases generated are as expected */
static int test__aliases(struct test_suite *test __maybe_unused,
int subtest __maybe_unused)
{
struct perf_pmu *pmu = NULL;
unsigned long i;
while ((pmu = perf_pmu__scan(pmu)) != NULL) {
int count = 0;
if (!is_pmu_core(pmu->name))
continue;
if (list_empty(&pmu->format)) {
pr_debug2("skipping testing core PMU %s\n", pmu->name);
continue;
}
if (__test_core_pmu_event_aliases(pmu->name, &count)) {
pr_debug("testing core PMU %s aliases: failed\n", pmu->name);
return -1;
}
if (count == 0) {
pr_debug("testing core PMU %s aliases: no events to match\n",
pmu->name);
return -1;
}
pr_debug("testing core PMU %s aliases: pass\n", pmu->name);
}
for (i = 0; i < ARRAY_SIZE(test_pmus); i++) {
int res = __test_uncore_pmu_event_aliases(&test_pmus[i]);
if (res)
return res;
}
return 0;
}
static bool is_number(const char *str)
{
char *end_ptr;
double v;
errno = 0;
v = strtod(str, &end_ptr);
(void)v; // We're not interested in this value, only if it is valid
return errno == 0 && end_ptr != str;
}
static int check_parse_id(const char *id, struct parse_events_error *error,
struct perf_pmu *fake_pmu)
{
struct evlist *evlist;
int ret;
char *dup, *cur;
/* Numbers are always valid. */
if (is_number(id))
return 0;
evlist = evlist__new();
if (!evlist)
return -ENOMEM;
dup = strdup(id);
if (!dup)
return -ENOMEM;
for (cur = strchr(dup, '@') ; cur; cur = strchr(++cur, '@'))
*cur = '/';
ret = __parse_events(evlist, dup, error, fake_pmu);
free(dup);
evlist__delete(evlist);
return ret;
}
static int check_parse_cpu(const char *id, bool same_cpu, const struct pmu_event *pe)
{
struct parse_events_error error;
int ret;
parse_events_error__init(&error);
ret = check_parse_id(id, &error, NULL);
if (ret && same_cpu) {
pr_warning("Parse event failed metric '%s' id '%s' expr '%s'\n",
pe->metric_name, id, pe->metric_expr);
pr_warning("Error string '%s' help '%s'\n", error.str,
error.help);
} else if (ret) {
pr_debug3("Parse event failed, but for an event that may not be supported by this CPU.\nid '%s' metric '%s' expr '%s'\n",
id, pe->metric_name, pe->metric_expr);
ret = 0;
}
parse_events_error__exit(&error);
return ret;
}
static int check_parse_fake(const char *id)
{
struct parse_events_error error;
int ret;
parse_events_error__init(&error);
ret = check_parse_id(id, &error, &perf_pmu__fake);
parse_events_error__exit(&error);
return ret;
}
static void expr_failure(const char *msg,
const struct pmu_events_map *map,
const struct pmu_event *pe)
{
pr_debug("%s for map %s %s %s\n",
msg, map->cpuid, map->version, map->type);
pr_debug("On metric %s\n", pe->metric_name);
pr_debug("On expression %s\n", pe->metric_expr);
}
struct metric {
struct list_head list;
struct metric_ref metric_ref;
};
static int resolve_metric_simple(struct expr_parse_ctx *pctx,
struct list_head *compound_list,
const struct pmu_events_map *map,
const char *metric_name)
{
struct hashmap_entry *cur, *cur_tmp;
struct metric *metric, *tmp;
size_t bkt;
bool all;
int rc;
do {
all = true;
hashmap__for_each_entry_safe(pctx->ids, cur, cur_tmp, bkt) {
struct metric_ref *ref;
const struct pmu_event *pe;
pe = metricgroup__find_metric(cur->key, map);
if (!pe)
continue;
if (!strcmp(metric_name, (char *)cur->key)) {
pr_warning("Recursion detected for metric %s\n", metric_name);
rc = -1;
goto out_err;
}
all = false;
/* The metric key itself needs to go out.. */
expr__del_id(pctx, cur->key);
metric = malloc(sizeof(*metric));
if (!metric) {
rc = -ENOMEM;
goto out_err;
}
ref = &metric->metric_ref;
ref->metric_name = pe->metric_name;
ref->metric_expr = pe->metric_expr;
list_add_tail(&metric->list, compound_list);
rc = expr__find_ids(pe->metric_expr, NULL, pctx);
if (rc)
goto out_err;
break; /* The hashmap has been modified, so restart */
}
} while (!all);
return 0;
out_err:
list_for_each_entry_safe(metric, tmp, compound_list, list)
free(metric);
return rc;
}
static int test__parsing(struct test_suite *test __maybe_unused,
int subtest __maybe_unused)
{
const struct pmu_events_map *cpus_map = pmu_events_map__find();
const struct pmu_events_map *map;
const struct pmu_event *pe;
int i, j, k;
int ret = 0;
struct expr_parse_ctx *ctx;
double result;
ctx = expr__ctx_new();
if (!ctx) {
pr_debug("expr__ctx_new failed");
return TEST_FAIL;
}
i = 0;
for (;;) {
map = &pmu_events_map[i++];
if (!map->table)
break;
j = 0;
for (;;) {
struct metric *metric, *tmp;
struct hashmap_entry *cur;
LIST_HEAD(compound_list);
size_t bkt;
pe = &map->table[j++];
if (!pe->name && !pe->metric_group && !pe->metric_name)
break;
if (!pe->metric_expr)
continue;
expr__ctx_clear(ctx);
if (expr__find_ids(pe->metric_expr, NULL, ctx) < 0) {
expr_failure("Parse find ids failed", map, pe);
ret++;
continue;
}
if (resolve_metric_simple(ctx, &compound_list, map,
pe->metric_name)) {
expr_failure("Could not resolve metrics", map, pe);
ret++;
goto exit; /* Don't tolerate errors due to severity */
}
/*
* Add all ids with a made up value. The value may
* trigger divide by zero when subtracted and so try to
* make them unique.
*/
k = 1;
hashmap__for_each_entry(ctx->ids, cur, bkt)
expr__add_id_val(ctx, strdup(cur->key), k++);
hashmap__for_each_entry(ctx->ids, cur, bkt) {
if (check_parse_cpu(cur->key, map == cpus_map,
pe))
ret++;
}
list_for_each_entry_safe(metric, tmp, &compound_list, list) {
expr__add_ref(ctx, &metric->metric_ref);
free(metric);
}
if (expr__parse(&result, ctx, pe->metric_expr)) {
/*
* Parsing failed, make numbers go from large to
* small which can resolve divide by zero
* issues.
*/
k = 1024;
hashmap__for_each_entry(ctx->ids, cur, bkt)
expr__add_id_val(ctx, strdup(cur->key), k--);
if (expr__parse(&result, ctx, pe->metric_expr)) {
expr_failure("Parse failed", map, pe);
ret++;
}
}
}
}
expr__ctx_free(ctx);
/* TODO: fail when not ok */
exit:
return ret == 0 ? TEST_OK : TEST_SKIP;
}
struct test_metric {
const char *str;
};
static struct test_metric metrics[] = {
{ "(unc_p_power_state_occupancy.cores_c0 / unc_p_clockticks) * 100." },
{ "imx8_ddr0@read\\-cycles@ * 4 * 4", },
{ "imx8_ddr0@axid\\-read\\,axi_mask\\=0xffff\\,axi_id\\=0x0000@ * 4", },
{ "(cstate_pkg@c2\\-residency@ / msr@tsc@) * 100", },
{ "(imx8_ddr0@read\\-cycles@ + imx8_ddr0@write\\-cycles@)", },
};
static int metric_parse_fake(const char *str)
{
struct expr_parse_ctx *ctx;
struct hashmap_entry *cur;
double result;
int ret = -1;
size_t bkt;
int i;
pr_debug("parsing '%s'\n", str);
ctx = expr__ctx_new();
if (!ctx) {
pr_debug("expr__ctx_new failed");
return TEST_FAIL;
}
if (expr__find_ids(str, NULL, ctx) < 0) {
pr_err("expr__find_ids failed\n");
return -1;
}
/*
* Add all ids with a made up value. The value may
* trigger divide by zero when subtracted and so try to
* make them unique.
*/
i = 1;
hashmap__for_each_entry(ctx->ids, cur, bkt)
expr__add_id_val(ctx, strdup(cur->key), i++);
hashmap__for_each_entry(ctx->ids, cur, bkt) {
if (check_parse_fake(cur->key)) {
pr_err("check_parse_fake failed\n");
goto out;
}
}
ret = 0;
if (expr__parse(&result, ctx, str)) {
/*
* Parsing failed, make numbers go from large to small which can
* resolve divide by zero issues.
*/
i = 1024;
hashmap__for_each_entry(ctx->ids, cur, bkt)
expr__add_id_val(ctx, strdup(cur->key), i--);
if (expr__parse(&result, ctx, str)) {
pr_err("expr__parse failed\n");
ret = -1;
}
}
out:
expr__ctx_free(ctx);
return ret;
}
/*
* Parse all the metrics for current architecture,
* or all defined cpus via the 'fake_pmu'
* in parse_events.
*/
static int test__parsing_fake(struct test_suite *test __maybe_unused,
int subtest __maybe_unused)
{
const struct pmu_events_map *map;
const struct pmu_event *pe;
unsigned int i, j;
int err = 0;
for (i = 0; i < ARRAY_SIZE(metrics); i++) {
err = metric_parse_fake(metrics[i].str);
if (err)
return err;
}
i = 0;
for (;;) {
map = &pmu_events_map[i++];
if (!map->table)
break;
j = 0;
for (;;) {
pe = &map->table[j++];
if (!pe->name && !pe->metric_group && !pe->metric_name)
break;
if (!pe->metric_expr)
continue;
err = metric_parse_fake(pe->metric_expr);
if (err)
return err;
}
}
return 0;
}
static struct test_case pmu_events_tests[] = {
TEST_CASE("PMU event table sanity", pmu_event_table),
TEST_CASE("PMU event map aliases", aliases),
TEST_CASE_REASON("Parsing of PMU event table metrics", parsing,
"some metrics failed"),
TEST_CASE("Parsing of PMU event table metrics with fake PMUs", parsing_fake),
{ .name = NULL, }
};
struct test_suite suite__pmu_events = {
.desc = "PMU events",
.test_cases = pmu_events_tests,
};