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-rw-r--r--tools/perf/util/evsel.h1
-rw-r--r--tools/perf/util/parse-events.c130
-rw-r--r--tools/perf/util/parse-events.h7
-rw-r--r--tools/perf/util/parse-events.y8
4 files changed, 137 insertions, 9 deletions
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 92ec009a292d..b13f5f234c8f 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -127,6 +127,7 @@ struct perf_evsel {
bool precise_max;
bool ignore_missing_thread;
bool forced_leader;
+ bool use_uncore_alias;
/* parse modifier helper */
int exclude_GH;
int nr_members;
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index b8b8a9558d32..2fc4ee8b86c1 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1219,13 +1219,16 @@ int parse_events_add_numeric(struct parse_events_state *parse_state,
int parse_events_add_pmu(struct parse_events_state *parse_state,
struct list_head *list, char *name,
- struct list_head *head_config, bool auto_merge_stats)
+ struct list_head *head_config,
+ bool auto_merge_stats,
+ bool use_alias)
{
struct perf_event_attr attr;
struct perf_pmu_info info;
struct perf_pmu *pmu;
struct perf_evsel *evsel;
struct parse_events_error *err = parse_state->error;
+ bool use_uncore_alias;
LIST_HEAD(config_terms);
pmu = perf_pmu__find(name);
@@ -1244,11 +1247,14 @@ int parse_events_add_pmu(struct parse_events_state *parse_state,
memset(&attr, 0, sizeof(attr));
}
+ use_uncore_alias = (pmu->is_uncore && use_alias);
+
if (!head_config) {
attr.type = pmu->type;
evsel = __add_event(list, &parse_state->idx, &attr, NULL, pmu, NULL, auto_merge_stats);
if (evsel) {
evsel->pmu_name = name;
+ evsel->use_uncore_alias = use_uncore_alias;
return 0;
} else {
return -ENOMEM;
@@ -1282,6 +1288,7 @@ int parse_events_add_pmu(struct parse_events_state *parse_state,
evsel->metric_expr = info.metric_expr;
evsel->metric_name = info.metric_name;
evsel->pmu_name = name;
+ evsel->use_uncore_alias = use_uncore_alias;
}
return evsel ? 0 : -ENOMEM;
@@ -1317,7 +1324,8 @@ int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
list_add_tail(&term->list, head);
if (!parse_events_add_pmu(parse_state, list,
- pmu->name, head, true)) {
+ pmu->name, head,
+ true, true)) {
pr_debug("%s -> %s/%s/\n", str,
pmu->name, alias->str);
ok++;
@@ -1339,7 +1347,120 @@ int parse_events__modifier_group(struct list_head *list,
return parse_events__modifier_event(list, event_mod, true);
}
-void parse_events__set_leader(char *name, struct list_head *list)
+/*
+ * Check if the two uncore PMUs are from the same uncore block
+ * The format of the uncore PMU name is uncore_#blockname_#pmuidx
+ */
+static bool is_same_uncore_block(const char *pmu_name_a, const char *pmu_name_b)
+{
+ char *end_a, *end_b;
+
+ end_a = strrchr(pmu_name_a, '_');
+ end_b = strrchr(pmu_name_b, '_');
+
+ if (!end_a || !end_b)
+ return false;
+
+ if ((end_a - pmu_name_a) != (end_b - pmu_name_b))
+ return false;
+
+ return (strncmp(pmu_name_a, pmu_name_b, end_a - pmu_name_a) == 0);
+}
+
+static int
+parse_events__set_leader_for_uncore_aliase(char *name, struct list_head *list,
+ struct parse_events_state *parse_state)
+{
+ struct perf_evsel *evsel, *leader;
+ uintptr_t *leaders;
+ bool is_leader = true;
+ int i, nr_pmu = 0, total_members, ret = 0;
+
+ leader = list_first_entry(list, struct perf_evsel, node);
+ evsel = list_last_entry(list, struct perf_evsel, node);
+ total_members = evsel->idx - leader->idx + 1;
+
+ leaders = calloc(total_members, sizeof(uintptr_t));
+ if (WARN_ON(!leaders))
+ return 0;
+
+ /*
+ * Going through the whole group and doing sanity check.
+ * All members must use alias, and be from the same uncore block.
+ * Also, storing the leader events in an array.
+ */
+ __evlist__for_each_entry(list, evsel) {
+
+ /* Only split the uncore group which members use alias */
+ if (!evsel->use_uncore_alias)
+ goto out;
+
+ /* The events must be from the same uncore block */
+ if (!is_same_uncore_block(leader->pmu_name, evsel->pmu_name))
+ goto out;
+
+ if (!is_leader)
+ continue;
+ /*
+ * If the event's PMU name starts to repeat, it must be a new
+ * event. That can be used to distinguish the leader from
+ * other members, even they have the same event name.
+ */
+ if ((leader != evsel) && (leader->pmu_name == evsel->pmu_name)) {
+ is_leader = false;
+ continue;
+ }
+ /* The name is always alias name */
+ WARN_ON(strcmp(leader->name, evsel->name));
+
+ /* Store the leader event for each PMU */
+ leaders[nr_pmu++] = (uintptr_t) evsel;
+ }
+
+ /* only one event alias */
+ if (nr_pmu == total_members) {
+ parse_state->nr_groups--;
+ goto handled;
+ }
+
+ /*
+ * An uncore event alias is a joint name which means the same event
+ * runs on all PMUs of a block.
+ * Perf doesn't support mixed events from different PMUs in the same
+ * group. The big group has to be split into multiple small groups
+ * which only include the events from the same PMU.
+ *
+ * Here the uncore event aliases must be from the same uncore block.
+ * The number of PMUs must be same for each alias. The number of new
+ * small groups equals to the number of PMUs.
+ * Setting the leader event for corresponding members in each group.
+ */
+ i = 0;
+ __evlist__for_each_entry(list, evsel) {
+ if (i >= nr_pmu)
+ i = 0;
+ evsel->leader = (struct perf_evsel *) leaders[i++];
+ }
+
+ /* The number of members and group name are same for each group */
+ for (i = 0; i < nr_pmu; i++) {
+ evsel = (struct perf_evsel *) leaders[i];
+ evsel->nr_members = total_members / nr_pmu;
+ evsel->group_name = name ? strdup(name) : NULL;
+ }
+
+ /* Take the new small groups into account */
+ parse_state->nr_groups += nr_pmu - 1;
+
+handled:
+ ret = 1;
+out:
+ free(leaders);
+ return ret;
+}
+
+void parse_events__set_leader(char *name, struct list_head *list,
+ struct parse_events_state *parse_state)
{
struct perf_evsel *leader;
@@ -1348,6 +1469,9 @@ void parse_events__set_leader(char *name, struct list_head *list)
return;
}
+ if (parse_events__set_leader_for_uncore_aliase(name, list, parse_state))
+ return;
+
__perf_evlist__set_leader(list);
leader = list_entry(list->next, struct perf_evsel, node);
leader->group_name = name ? strdup(name) : NULL;
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index 5015cfd58277..4473dac27aee 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -167,7 +167,9 @@ int parse_events_add_breakpoint(struct list_head *list, int *idx,
void *ptr, char *type, u64 len);
int parse_events_add_pmu(struct parse_events_state *parse_state,
struct list_head *list, char *name,
- struct list_head *head_config, bool auto_merge_stats);
+ struct list_head *head_config,
+ bool auto_merge_stats,
+ bool use_alias);
int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
char *str,
@@ -178,7 +180,8 @@ int parse_events_copy_term_list(struct list_head *old,
enum perf_pmu_event_symbol_type
perf_pmu__parse_check(const char *name);
-void parse_events__set_leader(char *name, struct list_head *list);
+void parse_events__set_leader(char *name, struct list_head *list,
+ struct parse_events_state *parse_state);
void parse_events_update_lists(struct list_head *list_event,
struct list_head *list_all);
void parse_events_evlist_error(struct parse_events_state *parse_state,
diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index 7afeb80cc39e..e37608a87dba 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -161,7 +161,7 @@ PE_NAME '{' events '}'
struct list_head *list = $3;
inc_group_count(list, _parse_state);
- parse_events__set_leader($1, list);
+ parse_events__set_leader($1, list, _parse_state);
$$ = list;
}
|
@@ -170,7 +170,7 @@ PE_NAME '{' events '}'
struct list_head *list = $2;
inc_group_count(list, _parse_state);
- parse_events__set_leader(NULL, list);
+ parse_events__set_leader(NULL, list, _parse_state);
$$ = list;
}
@@ -232,7 +232,7 @@ PE_NAME opt_event_config
YYABORT;
ALLOC_LIST(list);
- if (parse_events_add_pmu(_parse_state, list, $1, $2, false)) {
+ if (parse_events_add_pmu(_parse_state, list, $1, $2, false, false)) {
struct perf_pmu *pmu = NULL;
int ok = 0;
char *pattern;
@@ -251,7 +251,7 @@ PE_NAME opt_event_config
free(pattern);
YYABORT;
}
- if (!parse_events_add_pmu(_parse_state, list, pmu->name, terms, true))
+ if (!parse_events_add_pmu(_parse_state, list, pmu->name, terms, true, false))
ok++;
parse_events_terms__delete(terms);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-26 21:41:13 +0000