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-rw-r--r--tools/perf/util/pmu.c132
1 files changed, 101 insertions, 31 deletions
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 6b82f4759c..cc349d9cb0 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -36,6 +36,18 @@ struct perf_pmu perf_pmu__fake = {
#define UNIT_MAX_LEN 31 /* max length for event unit name */
+enum event_source {
+ /* An event loaded from /sys/devices/<pmu>/events. */
+ EVENT_SRC_SYSFS,
+ /* An event loaded from a CPUID matched json file. */
+ EVENT_SRC_CPU_JSON,
+ /*
+ * An event loaded from a /sys/devices/<pmu>/identifier matched json
+ * file.
+ */
+ EVENT_SRC_SYS_JSON,
+};
+
/**
* struct perf_pmu_alias - An event either read from sysfs or builtin in
* pmu-events.c, created by parsing the pmu-events json files.
@@ -425,9 +437,30 @@ static struct perf_pmu_alias *perf_pmu__find_alias(struct perf_pmu *pmu,
{
struct perf_pmu_alias *alias;
- if (load && !pmu->sysfs_aliases_loaded)
- pmu_aliases_parse(pmu);
+ if (load && !pmu->sysfs_aliases_loaded) {
+ bool has_sysfs_event;
+ char event_file_name[FILENAME_MAX + 8];
+
+ /*
+ * Test if alias/event 'name' exists in the PMU's sysfs/events
+ * directory. If not skip parsing the sysfs aliases. Sysfs event
+ * name must be all lower or all upper case.
+ */
+ scnprintf(event_file_name, sizeof(event_file_name), "events/%s", name);
+ for (size_t i = 7, n = 7 + strlen(name); i < n; i++)
+ event_file_name[i] = tolower(event_file_name[i]);
+
+ has_sysfs_event = perf_pmu__file_exists(pmu, event_file_name);
+ if (!has_sysfs_event) {
+ for (size_t i = 7, n = 7 + strlen(name); i < n; i++)
+ event_file_name[i] = toupper(event_file_name[i]);
+
+ has_sysfs_event = perf_pmu__file_exists(pmu, event_file_name);
+ }
+ if (has_sysfs_event)
+ pmu_aliases_parse(pmu);
+ }
list_for_each_entry(alias, &pmu->aliases, list) {
if (!strcasecmp(alias->name, name))
return alias;
@@ -500,7 +533,7 @@ static int update_alias(const struct pmu_event *pe,
static int perf_pmu__new_alias(struct perf_pmu *pmu, const char *name,
const char *desc, const char *val, FILE *val_fd,
- const struct pmu_event *pe)
+ const struct pmu_event *pe, enum event_source src)
{
struct perf_pmu_alias *alias;
int ret;
@@ -552,25 +585,30 @@ static int perf_pmu__new_alias(struct perf_pmu *pmu, const char *name,
}
snprintf(alias->unit, sizeof(alias->unit), "%s", unit);
}
- if (!pe) {
- /* Update an event from sysfs with json data. */
- struct update_alias_data data = {
- .pmu = pmu,
- .alias = alias,
- };
-
+ switch (src) {
+ default:
+ case EVENT_SRC_SYSFS:
alias->from_sysfs = true;
if (pmu->events_table) {
+ /* Update an event from sysfs with json data. */
+ struct update_alias_data data = {
+ .pmu = pmu,
+ .alias = alias,
+ };
if (pmu_events_table__find_event(pmu->events_table, pmu, name,
update_alias, &data) == 0)
- pmu->loaded_json_aliases++;
+ pmu->cpu_json_aliases++;
}
- }
-
- if (!pe)
pmu->sysfs_aliases++;
- else
- pmu->loaded_json_aliases++;
+ break;
+ case EVENT_SRC_CPU_JSON:
+ pmu->cpu_json_aliases++;
+ break;
+ case EVENT_SRC_SYS_JSON:
+ pmu->sys_json_aliases++;
+ break;
+
+ }
list_add_tail(&alias->list, &pmu->aliases);
return 0;
}
@@ -646,7 +684,8 @@ static int pmu_aliases_parse(struct perf_pmu *pmu)
}
if (perf_pmu__new_alias(pmu, name, /*desc=*/ NULL,
- /*val=*/ NULL, file, /*pe=*/ NULL) < 0)
+ /*val=*/ NULL, file, /*pe=*/ NULL,
+ EVENT_SRC_SYSFS) < 0)
pr_debug("Cannot set up %s\n", name);
fclose(file);
}
@@ -657,7 +696,7 @@ static int pmu_aliases_parse(struct perf_pmu *pmu)
return 0;
}
-static int pmu_alias_terms(struct perf_pmu_alias *alias, struct list_head *terms)
+static int pmu_alias_terms(struct perf_pmu_alias *alias, int err_loc, struct list_head *terms)
{
struct parse_events_term *term, *cloned;
struct parse_events_terms clone_terms;
@@ -675,6 +714,7 @@ static int pmu_alias_terms(struct perf_pmu_alias *alias, struct list_head *terms
* which we don't want for implicit terms in aliases.
*/
cloned->weak = true;
+ cloned->err_term = cloned->err_val = err_loc;
list_add_tail(&cloned->list, &clone_terms.terms);
}
list_splice_init(&clone_terms.terms, terms);
@@ -899,7 +939,8 @@ static int pmu_add_cpu_aliases_map_callback(const struct pmu_event *pe,
{
struct perf_pmu *pmu = vdata;
- perf_pmu__new_alias(pmu, pe->name, pe->desc, pe->event, /*val_fd=*/ NULL, pe);
+ perf_pmu__new_alias(pmu, pe->name, pe->desc, pe->event, /*val_fd=*/ NULL,
+ pe, EVENT_SRC_CPU_JSON);
return 0;
}
@@ -934,13 +975,14 @@ static int pmu_add_sys_aliases_iter_fn(const struct pmu_event *pe,
return 0;
if (pmu_uncore_alias_match(pe->pmu, pmu->name) &&
- pmu_uncore_identifier_match(pe->compat, pmu->id)) {
+ pmu_uncore_identifier_match(pe->compat, pmu->id)) {
perf_pmu__new_alias(pmu,
pe->name,
pe->desc,
pe->event,
/*val_fd=*/ NULL,
- pe);
+ pe,
+ EVENT_SRC_SYS_JSON);
}
return 0;
@@ -986,8 +1028,10 @@ static int pmu_max_precise(int dirfd, struct perf_pmu *pmu)
}
void __weak
-perf_pmu__arch_init(struct perf_pmu *pmu __maybe_unused)
+perf_pmu__arch_init(struct perf_pmu *pmu)
{
+ if (pmu->is_core)
+ pmu->mem_events = perf_mem_events;
}
struct perf_pmu *perf_pmu__lookup(struct list_head *pmus, int dirfd, const char *name)
@@ -1032,6 +1076,12 @@ struct perf_pmu *perf_pmu__lookup(struct list_head *pmus, int dirfd, const char
pmu->max_precise = pmu_max_precise(dirfd, pmu);
pmu->alias_name = pmu_find_alias_name(pmu, dirfd);
pmu->events_table = perf_pmu__find_events_table(pmu);
+ /*
+ * Load the sys json events/aliases when loading the PMU as each event
+ * may have a different compat regular expression. We therefore can't
+ * know the number of sys json events/aliases without computing the
+ * regular expressions for them all.
+ */
pmu_add_sys_aliases(pmu);
list_add_tail(&pmu->list, pmus);
@@ -1360,8 +1410,8 @@ static int pmu_config_term(const struct perf_pmu *pmu,
parse_events_error__handle(err, term->err_val,
asprintf(&err_str,
- "value too big for format, maximum is %llu",
- (unsigned long long)max_val) < 0
+ "value too big for format (%s), maximum is %llu",
+ format->name, (unsigned long long)max_val) < 0
? strdup("value too big for format")
: err_str,
NULL);
@@ -1515,7 +1565,7 @@ int perf_pmu__check_alias(struct perf_pmu *pmu, struct parse_events_terms *head_
alias = pmu_find_alias(pmu, term);
if (!alias)
continue;
- ret = pmu_alias_terms(alias, &term->list);
+ ret = pmu_alias_terms(alias, term->err_term, &term->list);
if (ret) {
parse_events_error__handle(err, term->err_term,
strdup("Failure to duplicate terms"),
@@ -1629,15 +1679,15 @@ size_t perf_pmu__num_events(struct perf_pmu *pmu)
{
size_t nr;
- if (!pmu->sysfs_aliases_loaded)
- pmu_aliases_parse(pmu);
-
- nr = pmu->sysfs_aliases;
+ pmu_aliases_parse(pmu);
+ nr = pmu->sysfs_aliases + pmu->sys_json_aliases;;
if (pmu->cpu_aliases_added)
- nr += pmu->loaded_json_aliases;
+ nr += pmu->cpu_json_aliases;
else if (pmu->events_table)
- nr += pmu_events_table__num_events(pmu->events_table, pmu) - pmu->loaded_json_aliases;
+ nr += pmu_events_table__num_events(pmu->events_table, pmu) - pmu->cpu_json_aliases;
+ else
+ assert(pmu->cpu_json_aliases == 0);
return pmu->selectable ? nr + 1 : nr;
}
@@ -1690,6 +1740,7 @@ int perf_pmu__for_each_event(struct perf_pmu *pmu, bool skip_duplicate_pmus,
struct strbuf sb;
strbuf_init(&sb, /*hint=*/ 0);
+ pmu_aliases_parse(pmu);
pmu_add_cpu_aliases(pmu);
list_for_each_entry(event, &pmu->aliases, list) {
size_t buf_used;
@@ -2082,3 +2133,22 @@ void perf_pmu__delete(struct perf_pmu *pmu)
zfree(&pmu->id);
free(pmu);
}
+
+const char *perf_pmu__name_from_config(struct perf_pmu *pmu, u64 config)
+{
+ struct perf_pmu_alias *event;
+
+ if (!pmu)
+ return NULL;
+
+ pmu_aliases_parse(pmu);
+ pmu_add_cpu_aliases(pmu);
+ list_for_each_entry(event, &pmu->aliases, list) {
+ struct perf_event_attr attr = {.config = 0,};
+ int ret = perf_pmu__config(pmu, &attr, &event->terms, NULL);
+
+ if (ret == 0 && config == attr.config)
+ return event->name;
+ }
+ return NULL;
+}