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perf pmu: Pass PMU rather than aliases and format

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Pass the pmu so the aliases and format list can be better abstracted
and later lazily loaded.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Gaosheng Cui <cuigaosheng1@huawei.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jing Zhang <renyu.zj@linux.alibaba.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230823080828.1460376-9-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ian Rogers 2023-08-23 01:08:11 -07:00 committed by Arnaldo Carvalho de Melo
parent da6a5afda5
commit 838a8c5f40
4 changed files with 68 additions and 71 deletions
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47
tools/perf/tests/pmu-events.c
View File

@ -496,26 +496,13 @@ static int test__pmu_event_table(struct test_suite *test __maybe_unused,
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_table *table = find_core_events_table("testarch", "testcpu");
struct perf_pmu_alias *a, *tmp;
if (!table)
return -1;
@ -526,14 +513,18 @@ static int __test_core_pmu_event_aliases(char *pmu_name, int *count)
if (!pmu)
return -1;
pmu->name = pmu_name;
INIT_LIST_HEAD(&pmu->format);
INIT_LIST_HEAD(&pmu->aliases);
INIT_LIST_HEAD(&pmu->caps);
INIT_LIST_HEAD(&pmu->list);
pmu->name = strdup(pmu_name);
pmu_add_cpu_aliases_table(&aliases, pmu, table);
pmu_add_cpu_aliases_table(pmu, table);
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);
struct perf_pmu_alias *alias = perf_pmu__find_alias(pmu, event->name);
if (!alias) {
pr_debug("testing aliases core PMU %s: no alias, alias_table->name=%s\n",
@ -551,12 +542,8 @@ static int __test_core_pmu_event_aliases(char *pmu_name, int *count)
pr_debug2("testing aliases core PMU %s: matched event %s\n",
pmu_name, alias->name);
}
perf_pmu__delete(pmu);
list_for_each_entry_safe(a, tmp, &aliases, list) {
list_del(&a->list);
perf_pmu_free_alias(a);
}
free(pmu);
return res;
}
@ -568,17 +555,16 @@ static int __test_uncore_pmu_event_aliases(struct perf_pmu_test_pmu *test_pmu)
const char *pmu_name = pmu->name;
struct perf_pmu_alias *a, *tmp, *alias;
const struct pmu_events_table *events_table;
LIST_HEAD(aliases);
int res = 0;
events_table = find_core_events_table("testarch", "testcpu");
if (!events_table)
return -1;
pmu_add_cpu_aliases_table(&aliases, pmu, events_table);
pmu_add_sys_aliases(&aliases, pmu);
pmu_add_cpu_aliases_table(pmu, events_table);
pmu_add_sys_aliases(pmu);
/* Count how many aliases we generated */
list_for_each_entry(alias, &aliases, list)
list_for_each_entry(alias, &pmu->aliases, list)
alias_count++;
/* Count how many aliases we expect from the known table */
@ -592,7 +578,7 @@ static int __test_uncore_pmu_event_aliases(struct perf_pmu_test_pmu *test_pmu)
goto out;
}
list_for_each_entry(alias, &aliases, list) {
list_for_each_entry(alias, &pmu->aliases, list) {
bool matched = false;
for (table = &test_pmu->aliases[0]; *table; table++) {
@ -625,7 +611,7 @@ static int __test_uncore_pmu_event_aliases(struct perf_pmu_test_pmu *test_pmu)
}
out:
list_for_each_entry_safe(a, tmp, &aliases, list) {
list_for_each_entry_safe(a, tmp, &pmu->aliases, list) {
list_del(&a->list);
perf_pmu_free_alias(a);
}
@ -732,8 +718,13 @@ static int test__aliases(struct test_suite *test __maybe_unused,
}
for (i = 0; i < ARRAY_SIZE(test_pmus); i++) {
int res = __test_uncore_pmu_event_aliases(&test_pmus[i]);
int res;
INIT_LIST_HEAD(&test_pmus[i].pmu.format);
INIT_LIST_HEAD(&test_pmus[i].pmu.aliases);
INIT_LIST_HEAD(&test_pmus[i].pmu.caps);
res = __test_uncore_pmu_event_aliases(&test_pmus[i]);
if (res)
return res;
}

2
tools/perf/tests/pmu.c
View File

@ -171,7 +171,7 @@ static int test__pmu(struct test_suite *test __maybe_unused, int subtest __maybe
}
pmu->name = strdup("perf-pmu-test");
ret = perf_pmu__format_parse(fd, &pmu->format);
ret = perf_pmu__format_parse(pmu, fd);
if (ret)
goto out;

81
tools/perf/util/pmu.c
View File

@ -58,7 +58,7 @@ struct perf_pmu_format {
* Parse & process all the sysfs attributes located under
* the directory specified in 'dir' parameter.
*/
int perf_pmu__format_parse(int dirfd, struct list_head *head)
int perf_pmu__format_parse(struct perf_pmu *pmu, int dirfd)
{
struct dirent *evt_ent;
DIR *format_dir;
@ -96,7 +96,7 @@ int perf_pmu__format_parse(int dirfd, struct list_head *head)
}
perf_pmu_set_in(file, scanner);
ret = perf_pmu_parse(head, name, scanner);
ret = perf_pmu_parse(&pmu->format, name, scanner);
perf_pmu_lex_destroy(scanner);
fclose(file);
}
@ -110,7 +110,7 @@ int perf_pmu__format_parse(int dirfd, struct list_head *head)
* located at:
* /sys/bus/event_source/devices/<dev>/format as sysfs group attributes.
*/
static int pmu_format(int dirfd, const char *name, struct list_head *format)
static int pmu_format(struct perf_pmu *pmu, int dirfd, const char *name)
{
int fd;
@ -119,7 +119,7 @@ static int pmu_format(int dirfd, const char *name, struct list_head *format)
return 0;
/* it'll close the fd */
if (perf_pmu__format_parse(fd, format))
if (perf_pmu__format_parse(pmu, fd))
return -1;
return 0;
@ -508,7 +508,7 @@ static int pmu_aliases_parse(int dirfd, struct list_head *head)
* Reading the pmu event aliases definition, which should be located at:
* /sys/bus/event_source/devices/<dev>/events as sysfs group attributes.
*/
static int pmu_aliases(int dirfd, const char *name, struct list_head *head)
static int pmu_aliases(struct perf_pmu *pmu, int dirfd, const char *name)
{
int fd;
@ -517,7 +517,7 @@ static int pmu_aliases(int dirfd, const char *name, struct list_head *head)
return 0;
/* it'll close the fd */
if (pmu_aliases_parse(fd, head))
if (pmu_aliases_parse(fd, &pmu->aliases))
return -1;
return 0;
@ -770,11 +770,10 @@ static int pmu_add_cpu_aliases_map_callback(const struct pmu_event *pe,
* From the pmu_events_table, find the events that correspond to the given
* PMU and add them to the list 'head'.
*/
void pmu_add_cpu_aliases_table(struct list_head *head, struct perf_pmu *pmu,
const struct pmu_events_table *table)
void pmu_add_cpu_aliases_table(struct perf_pmu *pmu, const struct pmu_events_table *table)
{
struct pmu_add_cpu_aliases_map_data data = {
.head = head,
.head = &pmu->aliases,
.default_pmu_name = perf_pmus__default_pmu_name(),
.pmu = pmu,
};
@ -783,7 +782,7 @@ void pmu_add_cpu_aliases_table(struct list_head *head, struct perf_pmu *pmu,
free(data.default_pmu_name);
}
static void pmu_add_cpu_aliases(struct list_head *head, struct perf_pmu *pmu)
static void pmu_add_cpu_aliases(struct perf_pmu *pmu)
{
const struct pmu_events_table *table;
@ -791,7 +790,7 @@ static void pmu_add_cpu_aliases(struct list_head *head, struct perf_pmu *pmu)
if (!table)
return;
pmu_add_cpu_aliases_table(head, pmu, table);
pmu_add_cpu_aliases_table(pmu, table);
}
struct pmu_sys_event_iter_data {
@ -821,10 +820,10 @@ static int pmu_add_sys_aliases_iter_fn(const struct pmu_event *pe,
return 0;
}
void pmu_add_sys_aliases(struct list_head *head, struct perf_pmu *pmu)
void pmu_add_sys_aliases(struct perf_pmu *pmu)
{
struct pmu_sys_event_iter_data idata = {
.head = head,
.head = &pmu->aliases,
.pmu = pmu,
};
@ -863,30 +862,33 @@ static int pmu_max_precise(int dirfd, struct perf_pmu *pmu)
struct perf_pmu *perf_pmu__lookup(struct list_head *pmus, int dirfd, const char *lookup_name)
{
struct perf_pmu *pmu;
LIST_HEAD(format);
LIST_HEAD(aliases);
__u32 type;
char *name = pmu_find_real_name(lookup_name);
char *alias_name;
/*
* The pmu data we store & need consists of the pmu
* type value and format definitions. Load both right
* now.
*/
if (pmu_format(dirfd, name, &format))
return NULL;
/*
* Check the aliases first to avoid unnecessary work.
*/
if (pmu_aliases(dirfd, name, &aliases))
return NULL;
pmu = zalloc(sizeof(*pmu));
if (!pmu)
return NULL;
INIT_LIST_HEAD(&pmu->format);
INIT_LIST_HEAD(&pmu->aliases);
INIT_LIST_HEAD(&pmu->caps);
/*
* The pmu data we store & need consists of the pmu
* type value and format definitions. Load both right
* now.
*/
if (pmu_format(pmu, dirfd, name)) {
free(pmu);
return NULL;
}
/*
* Check the aliases first to avoid unnecessary work.
*/
if (pmu_aliases(pmu, dirfd, name)) {
free(pmu);
return NULL;
}
pmu->is_core = is_pmu_core(name);
pmu->cpus = pmu_cpumask(dirfd, name, pmu->is_core);
pmu->name = strdup(name);
@ -909,14 +911,8 @@ struct perf_pmu *perf_pmu__lookup(struct list_head *pmus, int dirfd, const char
if (pmu->is_uncore)
pmu->id = pmu_id(name);
pmu->max_precise = pmu_max_precise(dirfd, pmu);
pmu_add_cpu_aliases(&aliases, pmu);
pmu_add_sys_aliases(&aliases, pmu);
INIT_LIST_HEAD(&pmu->format);
INIT_LIST_HEAD(&pmu->aliases);
INIT_LIST_HEAD(&pmu->caps);
list_splice(&format, &pmu->format);
list_splice(&aliases, &pmu->aliases);
pmu_add_cpu_aliases(pmu);
pmu_add_sys_aliases(pmu);
list_add_tail(&pmu->list, pmus);
pmu->default_config = perf_pmu__get_default_config(pmu);
@ -1397,6 +1393,17 @@ int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,
return 0;
}
struct perf_pmu_alias *perf_pmu__find_alias(struct perf_pmu *pmu, const char *event)
{
struct perf_pmu_alias *alias;
list_for_each_entry(alias, &pmu->aliases, list)
if (!strcmp(event, alias->name))
return alias;
return NULL;
}
int perf_pmu__new_format(struct list_head *list, char *name,
int config, unsigned long *bits)
{

9
tools/perf/util/pmu.h
View File

@ -213,7 +213,7 @@ struct perf_pmu_alias {
char *pmu_name;
};
void pmu_add_sys_aliases(struct list_head *head, struct perf_pmu *pmu);
void pmu_add_sys_aliases(struct perf_pmu *pmu);
int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr,
struct list_head *head_terms,
struct parse_events_error *error);
@ -225,12 +225,11 @@ __u64 perf_pmu__format_bits(struct perf_pmu *pmu, const char *name);
int perf_pmu__format_type(struct perf_pmu *pmu, const char *name);
int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,
struct perf_pmu_info *info);
struct list_head *perf_pmu__alias(struct perf_pmu *pmu,
struct list_head *head_terms);
struct perf_pmu_alias *perf_pmu__find_alias(struct perf_pmu *pmu, const char *event);
int perf_pmu__new_format(struct list_head *list, char *name,
int config, unsigned long *bits);
int perf_pmu__format_parse(int dirfd, struct list_head *head);
int perf_pmu__format_parse(struct perf_pmu *pmu, int dirfd);
bool perf_pmu__has_format(const struct perf_pmu *pmu, const char *name);
bool is_pmu_core(const char *name);
@ -255,7 +254,7 @@ bool perf_pmu__file_exists(struct perf_pmu *pmu, const char *name);
int perf_pmu__test(void);
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,
void pmu_add_cpu_aliases_table(struct perf_pmu *pmu,
const struct pmu_events_table *table);
char *perf_pmu__getcpuid(struct perf_pmu *pmu);