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perf pmu-events: Hide pmu_events_map

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Move usage of the table to pmu-events.c so it may be hidden. By
abstracting the table the implementation can later be changed.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.garry@huawei.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Will Deacon <will@kernel.org>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20220812230949.683239-8-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ian Rogers 2022-08-12 16:09:42 -07:00 committed by Arnaldo Carvalho de Melo
parent eeac773041
commit 29be2fe0c1
7 changed files with 284 additions and 184 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

81
tools/perf/pmu-events/empty-pmu-events.c
View File

@ -6,6 +6,8 @@
* The test cpu/soc is provided for testing.
*/
#include "pmu-events/pmu-events.h"
#include "util/header.h"
#include "util/pmu.h"
#include <string.h>
#include <stddef.h>
@ -110,7 +112,26 @@ static const struct pmu_event pme_test_soc_cpu[] = {
},
};
const struct pmu_events_map pmu_events_map[] = {
/*
* Map a CPU to its table of PMU events. The CPU is identified by the
* cpuid field, which is an arch-specific identifier for the CPU.
* The identifier specified in tools/perf/pmu-events/arch/xxx/mapfile
* must match the get_cpuid_str() in tools/perf/arch/xxx/util/header.c)
*
* The cpuid can contain any character other than the comma.
*/
struct pmu_events_map {
const char *arch;
const char *cpuid;
const struct pmu_event *table;
};
/*
* Global table mapping each known CPU for the architecture to its
* table of PMU events.
*/
static const struct pmu_events_map pmu_events_map[] = {
{
.arch = "testarch",
.cpuid = "testcpu",
@ -162,6 +183,62 @@ static const struct pmu_sys_events pmu_sys_event_tables[] = {
},
};
const struct pmu_event *perf_pmu__find_table(struct perf_pmu *pmu)
{
const struct pmu_event *table = NULL;
char *cpuid = perf_pmu__getcpuid(pmu);
int i;
/* on some platforms which uses cpus map, cpuid can be NULL for
* PMUs other than CORE PMUs.
*/
if (!cpuid)
return NULL;
i = 0;
for (;;) {
const struct pmu_events_map *map = &pmu_events_map[i++];
if (!map->table)
break;
if (!strcmp_cpuid_str(map->cpuid, cpuid)) {
table = map->table;
break;
}
}
free(cpuid);
return table;
}
const struct pmu_event *find_core_events_table(const char *arch, const char *cpuid)
{
for (const struct pmu_events_map *tables = &pmu_events_map[0];
tables->table;
tables++) {
if (!strcmp(tables->arch, arch) && !strcmp_cpuid_str(tables->cpuid, cpuid))
return tables->table;
}
return NULL;
}
int pmu_for_each_core_event(pmu_event_iter_fn fn, void *data)
{
for (const struct pmu_events_map *tables = &pmu_events_map[0];
tables->table;
tables++) {
for (const struct pmu_event *pe = &tables->table[0];
pe->name || pe->metric_group || pe->metric_name;
pe++) {
int ret = fn(pe, &tables->table[0], data);
if (ret)
return ret;
}
}
return 0;
}
const struct pmu_event *find_sys_events_table(const char *name)
{
for (const struct pmu_sys_events *tables = &pmu_sys_event_tables[0];
@ -181,7 +258,7 @@ int pmu_for_each_sys_event(pmu_event_iter_fn fn, void *data)
for (const struct pmu_event *pe = &tables->table[0];
pe->name || pe->metric_group || pe->metric_name;
pe++) {
int ret = fn(pe, data);
int ret = fn(pe, &tables->table[0], data);
if (ret)
return ret;

81
tools/perf/pmu-events/jevents.py
View File

@ -334,7 +334,27 @@ def process_one_file(parents: Sequence[str], item: os.DirEntry) -> None:
def print_mapping_table(archs: Sequence[str]) -> None:
"""Read the mapfile and generate the struct from cpuid string to event table."""
_args.output_file.write('const struct pmu_events_map pmu_events_map[] = {\n')
_args.output_file.write("""
/*
* Map a CPU to its table of PMU events. The CPU is identified by the
* cpuid field, which is an arch-specific identifier for the CPU.
* The identifier specified in tools/perf/pmu-events/arch/xxx/mapfile
* must match the get_cpuid_str() in tools/perf/arch/xxx/util/header.c)
*
* The cpuid can contain any character other than the comma.
*/
struct pmu_events_map {
const char *arch;
const char *cpuid;
const struct pmu_event *table;
};
/*
* Global table mapping each known CPU for the architecture to its
* table of PMU events.
*/
const struct pmu_events_map pmu_events_map[] = {
""")
for arch in archs:
if arch == 'test':
_args.output_file.write("""{
@ -390,6 +410,61 @@ static const struct pmu_sys_events pmu_sys_event_tables[] = {
\t},
};
const struct pmu_event *perf_pmu__find_table(struct perf_pmu *pmu)
{
const struct pmu_event *table = NULL;
char *cpuid = perf_pmu__getcpuid(pmu);
int i;
/* on some platforms which uses cpus map, cpuid can be NULL for
* PMUs other than CORE PMUs.
*/
if (!cpuid)
return NULL;
i = 0;
for (;;) {
const struct pmu_events_map *map = &pmu_events_map[i++];
if (!map->table)
break;
if (!strcmp_cpuid_str(map->cpuid, cpuid)) {
table = map->table;
break;
}
}
free(cpuid);
return table;
}
const struct pmu_event *find_core_events_table(const char *arch, const char *cpuid)
{
for (const struct pmu_events_map *tables = &pmu_events_map[0];
tables->table;
tables++) {
if (!strcmp(tables->arch, arch) && !strcmp_cpuid_str(tables->cpuid, cpuid))
return tables->table;
}
return NULL;
}
int pmu_for_each_core_event(pmu_event_iter_fn fn, void *data)
{
for (const struct pmu_events_map *tables = &pmu_events_map[0];
tables->table;
tables++) {
for (const struct pmu_event *pe = &tables->table[0];
pe->name || pe->metric_group || pe->metric_name;
pe++) {
int ret = fn(pe, &tables->table[0], data);
if (ret)
return ret;
}
}
return 0;
}
const struct pmu_event *find_sys_events_table(const char *name)
{
for (const struct pmu_sys_events *tables = &pmu_sys_event_tables[0];
@ -409,7 +484,7 @@ int pmu_for_each_sys_event(pmu_event_iter_fn fn, void *data)
for (const struct pmu_event *pe = &tables->table[0];
pe->name || pe->metric_group || pe->metric_name;
pe++) {
int ret = fn(pe, data);
int ret = fn(pe, &tables->table[0], data);
if (ret)
return ret;
@ -450,6 +525,8 @@ def main() -> None:
_args.output_file.write("""
#include "pmu-events/pmu-events.h"
#include "util/header.h"
#include "util/pmu.h"
#include <string.h>
#include <stddef.h>

29
tools/perf/pmu-events/pmu-events.h
View File

@ -2,6 +2,8 @@
#ifndef PMU_EVENTS_H
#define PMU_EVENTS_H
struct perf_pmu;
enum aggr_mode_class {
PerChip = 1,
PerCore
@ -28,30 +30,15 @@ struct pmu_event {
const char *metric_constraint;
};
/*
*
* Map a CPU to its table of PMU events. The CPU is identified by the
* cpuid field, which is an arch-specific identifier for the CPU.
* The identifier specified in tools/perf/pmu-events/arch/xxx/mapfile
* must match the get_cpuid_str() in tools/perf/arch/xxx/util/header.c)
*
* The cpuid can contain any character other than the comma.
*/
struct pmu_events_map {
const char *arch;
const char *cpuid;
const struct pmu_event *table;
};
typedef int (*pmu_event_iter_fn)(const struct pmu_event *pe,
const struct pmu_event *table,
void *data);
/*
* Global table mapping each known CPU for the architecture to its
* table of PMU events.
*/
extern const struct pmu_events_map pmu_events_map[];
const struct pmu_event *perf_pmu__find_table(struct perf_pmu *pmu);
const struct pmu_event *find_core_events_table(const char *arch, const char *cpuid);
int pmu_for_each_core_event(pmu_event_iter_fn fn, void *data);
const struct pmu_event *find_sys_events_table(const char *name);
typedef int (*pmu_event_iter_fn)(const struct pmu_event *pe, void *data);
int pmu_for_each_sys_event(pmu_event_iter_fn fn, void *data);
#endif

226
tools/perf/tests/pmu-events.c
View File

@ -272,18 +272,6 @@ static bool is_same(const char *reference, const char *test)
return !strcmp(reference, test);
}
static const struct pmu_event *__test_pmu_get_events_table(void)
{
for (const struct pmu_events_map *map = &pmu_events_map[0]; map->cpuid; map++) {
if (!strcmp(map->cpuid, "testcpu"))
return map->table;
}
pr_err("could not find test events map\n");
return NULL;
}
static int compare_pmu_events(const struct pmu_event *e1, const struct pmu_event *e2)
{
if (!is_same(e1->name, e2->name)) {
@ -438,7 +426,7 @@ static int test__pmu_event_table(struct test_suite *test __maybe_unused,
int subtest __maybe_unused)
{
const struct pmu_event *sys_event_tables = find_sys_events_table("pme_test_soc_sys");
const struct pmu_event *table = __test_pmu_get_events_table();
const struct pmu_event *table = find_core_events_table("testarch", "testcpu");
int map_events = 0, expected_events;
/* ignore 3x sentinels */
@ -534,7 +522,7 @@ static int __test_core_pmu_event_aliases(char *pmu_name, int *count)
struct perf_pmu *pmu;
LIST_HEAD(aliases);
int res = 0;
const struct pmu_event *table = __test_pmu_get_events_table();
const struct pmu_event *table = find_core_events_table("testarch", "testcpu");
struct perf_pmu_alias *a, *tmp;
if (!table)
@ -591,7 +579,7 @@ static int __test_uncore_pmu_event_aliases(struct perf_pmu_test_pmu *test_pmu)
LIST_HEAD(aliases);
int res = 0;
events_table = __test_pmu_get_events_table();
events_table = find_core_events_table("testarch", "testcpu");
if (!events_table)
return -1;
pmu_add_cpu_aliases_table(&aliases, pmu, events_table);
@ -845,11 +833,6 @@ static int check_parse_fake(const char *id)
return ret;
}
static void expr_failure(const char *msg, const struct pmu_event *pe)
{
pr_debug("%s\nOn metric %s\nOn expression %s\n", msg, pe->metric_name, pe->metric_expr);
}
struct metric {
struct list_head list;
struct metric_ref metric_ref;
@ -915,93 +898,100 @@ out_err:
}
static void expr_failure(const char *msg, const struct pmu_event *pe)
{
pr_debug("%s\nOn metric %s\nOn expression %s\n", msg, pe->metric_name, pe->metric_expr);
}
struct test__parsing_data {
const struct pmu_event *cpus_table;
struct expr_parse_ctx *ctx;
int failures;
};
static int test__parsing_callback(const struct pmu_event *pe, const struct pmu_event *table,
void *vdata)
{
struct test__parsing_data *data = vdata;
struct metric *metric, *tmp;
struct hashmap_entry *cur;
LIST_HEAD(compound_list);
size_t bkt;
int k;
double result;
if (!pe->metric_expr)
return 0;
pr_debug("Found metric '%s'\n", pe->metric_name);
expr__ctx_clear(data->ctx);
if (expr__find_ids(pe->metric_expr, NULL, data->ctx) < 0) {
expr_failure("Parse find ids failed", pe);
data->failures++;
return 0;
}
if (resolve_metric_simple(data->ctx, &compound_list, table,
pe->metric_name)) {
expr_failure("Could not resolve metrics", pe);
data->failures++;
return TEST_FAIL; /* 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(data->ctx->ids, cur, bkt)
expr__add_id_val(data->ctx, strdup(cur->key), k++);
hashmap__for_each_entry(data->ctx->ids, cur, bkt) {
if (check_parse_cpu(cur->key, table == data->cpus_table, pe))
data->failures++;
}
list_for_each_entry_safe(metric, tmp, &compound_list, list) {
expr__add_ref(data->ctx, &metric->metric_ref);
free(metric);
}
if (expr__parse(&result, data->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(data->ctx->ids, cur, bkt)
expr__add_id_val(data->ctx, strdup(cur->key), k--);
if (expr__parse(&result, data->ctx, pe->metric_expr)) {
expr_failure("Parse failed", pe);
data->failures++;
}
}
return 0;
}
static int test__parsing(struct test_suite *test __maybe_unused,
int subtest __maybe_unused)
{
const struct pmu_event *cpus_table = pmu_events_table__find();
const struct pmu_event *pe;
int i, j, k;
int ret = 0;
struct expr_parse_ctx *ctx;
double result;
struct test__parsing_data data = {
.cpus_table = pmu_events_table__find(),
.ctx = expr__ctx_new(),
.failures = 0,
};
ctx = expr__ctx_new();
if (!ctx) {
if (!data.ctx) {
pr_debug("expr__ctx_new failed");
return TEST_FAIL;
}
i = 0;
for (;;) {
const struct pmu_events_map *map = &pmu_events_map[i++];
pmu_for_each_core_event(test__parsing_callback, &data);
pmu_for_each_sys_event(test__parsing_callback, &data);
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", pe);
ret++;
continue;
}
if (resolve_metric_simple(ctx, &compound_list, map->table,
pe->metric_name)) {
expr_failure("Could not resolve metrics", 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->table == cpus_table,
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", pe);
ret++;
}
}
}
}
expr__ctx_free(ctx);
/* TODO: fail when not ok */
exit:
return ret == 0 ? TEST_OK : TEST_SKIP;
expr__ctx_free(data.ctx);
return data.failures == 0 ? TEST_OK : TEST_FAIL;
}
struct test_metric {
@ -1073,6 +1063,16 @@ out:
return ret;
}
static int test__parsing_fake_callback(const struct pmu_event *pe,
const struct pmu_event *table __maybe_unused,
void *data __maybe_unused)
{
if (!pe->metric_expr)
return 0;
return metric_parse_fake(pe->metric_expr);
}
/*
* Parse all the metrics for current architecture,
* or all defined cpus via the 'fake_pmu'
@ -1081,37 +1081,19 @@ out:
static int test__parsing_fake(struct test_suite *test __maybe_unused,
int subtest __maybe_unused)
{
unsigned int i, j;
int err = 0;
for (i = 0; i < ARRAY_SIZE(metrics); i++) {
for (size_t i = 0; i < ARRAY_SIZE(metrics); i++) {
err = metric_parse_fake(metrics[i].str);
if (err)
return err;
}
i = 0;
for (;;) {
const struct pmu_events_map *map = &pmu_events_map[i++];
err = pmu_for_each_core_event(test__parsing_fake_callback, NULL);
if (err)
return err;
if (!map->table)
break;
j = 0;
for (;;) {
const struct pmu_event *pe = &map->table[j++];
if (!pe->name && !pe->metric_group && !pe->metric_name)
break;
if (!pe->metric_expr)
continue;
pr_debug("Found metric '%s' for '%s'\n", pe->metric_name, map->cpuid);
err = metric_parse_fake(pe->metric_expr);
if (err)
return err;
}
}
return 0;
return pmu_for_each_sys_event(test__parsing_fake_callback, NULL);
}
static struct test_case pmu_events_tests[] = {

15
tools/perf/util/metricgroup.c
View File

@ -502,14 +502,14 @@ struct metricgroup_print_sys_idata {
bool details;
};
typedef int (*metricgroup_sys_event_iter_fn)(const struct pmu_event *pe, void *);
struct metricgroup_iter_data {
metricgroup_sys_event_iter_fn fn;
pmu_event_iter_fn fn;
void *data;
};
static int metricgroup__sys_event_iter(const struct pmu_event *pe, void *data)
static int metricgroup__sys_event_iter(const struct pmu_event *pe,
const struct pmu_event *table __maybe_unused,
void *data)
{
struct metricgroup_iter_data *d = data;
struct perf_pmu *pmu = NULL;
@ -522,13 +522,15 @@ static int metricgroup__sys_event_iter(const struct pmu_event *pe, void *data)
if (!pmu->id || strcmp(pmu->id, pe->compat))
continue;
return d->fn(pe, d->data);
return d->fn(pe, table, d->data);
}
return 0;
}
static int metricgroup__print_sys_event_iter(const struct pmu_event *pe, void *data)
static int metricgroup__print_sys_event_iter(const struct pmu_event *pe,
const struct pmu_event *table __maybe_unused,
void *data)
{
struct metricgroup_print_sys_idata *d = data;
@ -1101,6 +1103,7 @@ static int add_metric(struct list_head *metric_list,
}
static int metricgroup__add_metric_sys_event_iter(const struct pmu_event *pe,
const struct pmu_event *table __maybe_unused,
void *data)
{
struct metricgroup_add_iter_data *d = data;

34
tools/perf/util/pmu.c
View File

@ -690,7 +690,7 @@ static int is_arm_pmu_core(const char *name)
return file_available(path);
}
static char *perf_pmu__getcpuid(struct perf_pmu *pmu)
char *perf_pmu__getcpuid(struct perf_pmu *pmu)
{
char *cpuid;
static bool printed;
@ -710,34 +710,6 @@ static char *perf_pmu__getcpuid(struct perf_pmu *pmu)
return cpuid;
}
const struct pmu_event *perf_pmu__find_table(struct perf_pmu *pmu)
{
const struct pmu_event *table = NULL;
char *cpuid = perf_pmu__getcpuid(pmu);
int i;
/* on some platforms which uses cpus map, cpuid can be NULL for
* PMUs other than CORE PMUs.
*/
if (!cpuid)
return NULL;
i = 0;
for (;;) {
const struct pmu_events_map *map = &pmu_events_map[i++];
if (!map->table)
break;
if (!strcmp_cpuid_str(map->cpuid, cpuid)) {
table = map->table;
break;
}
}
free(cpuid);
return table;
}
__weak const struct pmu_event *pmu_events_table__find(void)
{
return perf_pmu__find_table(NULL);
@ -874,7 +846,9 @@ struct pmu_sys_event_iter_data {
struct perf_pmu *pmu;
};
static int pmu_add_sys_aliases_iter_fn(const struct pmu_event *pe, void *data)
static int pmu_add_sys_aliases_iter_fn(const struct pmu_event *pe,
const struct pmu_event *table __maybe_unused,
void *data)
{
struct pmu_sys_event_iter_data *idata = data;
struct perf_pmu *pmu = idata->pmu;

2
tools/perf/util/pmu.h
View File

@ -128,7 +128,7 @@ struct perf_event_attr *perf_pmu__get_default_config(struct perf_pmu *pmu);
void pmu_add_cpu_aliases_table(struct list_head *head, struct perf_pmu *pmu,
const struct pmu_event *table);
const struct pmu_event *perf_pmu__find_table(struct perf_pmu *pmu);
char *perf_pmu__getcpuid(struct perf_pmu *pmu);
const struct pmu_event *pmu_events_table__find(void);
bool pmu_uncore_alias_match(const char *pmu_name, const char *name);
void perf_pmu_free_alias(struct perf_pmu_alias *alias);