1 files changed, 208 insertions, 1 deletions

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index bc45cee3f77c..0528d1bc15d2 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -142,6 +142,7 @@ struct perf_stat {
 	struct perf_cpu_map	*cpus;
 	struct perf_thread_map *threads;
 	enum aggr_mode		 aggr_mode;
+	u32			 aggr_level;
 };
 
 static struct perf_stat		perf_stat;
@@ -151,6 +152,7 @@ static volatile sig_atomic_t done = 0;
 
 static struct perf_stat_config stat_config = {
 	.aggr_mode		= AGGR_GLOBAL,
+	.aggr_level		= MAX_CACHE_LVL + 1,
 	.scale			= true,
 	.unit_width		= 4, /* strlen("unit") */
 	.run_count		= 1,
@@ -1249,8 +1251,132 @@ static struct option stat_options[] = {
 	OPT_END()
 };
 
+/**
+ * Calculate the cache instance ID from the map in
+ * /sys/devices/system/cpu/cpuX/cache/indexY/shared_cpu_list
+ * Cache instance ID is the first CPU reported in the shared_cpu_list file.
+ */
+static int cpu__get_cache_id_from_map(struct perf_cpu cpu, char *map)
+{
+	int id;
+	struct perf_cpu_map *cpu_map = perf_cpu_map__new(map);
+
+	/*
+	 * If the map contains no CPU, consider the current CPU to
+	 * be the first online CPU in the cache domain else use the
+	 * first online CPU of the cache domain as the ID.
+	 */
+	if (perf_cpu_map__empty(cpu_map))
+		id = cpu.cpu;
+	else
+		id = perf_cpu_map__cpu(cpu_map, 0).cpu;
+
+	/* Free the perf_cpu_map used to find the cache ID */
+	perf_cpu_map__put(cpu_map);
+
+	return id;
+}
+
+/**
+ * cpu__get_cache_id - Returns 0 if successful in populating the
+ * cache level and cache id. Cache level is read from
+ * /sys/devices/system/cpu/cpuX/cache/indexY/level where as cache instance ID
+ * is the first CPU reported by
+ * /sys/devices/system/cpu/cpuX/cache/indexY/shared_cpu_list
+ */
+static int cpu__get_cache_details(struct perf_cpu cpu, struct perf_cache *cache)
+{
+	int ret = 0;
+	u32 cache_level = stat_config.aggr_level;
+	struct cpu_cache_level caches[MAX_CACHE_LVL];
+	u32 i = 0, caches_cnt = 0;
+
+	cache->cache_lvl = (cache_level > MAX_CACHE_LVL) ? 0 : cache_level;
+	cache->cache = -1;
+
+	ret = build_caches_for_cpu(cpu.cpu, caches, &caches_cnt);
+	if (ret) {
+		/*
+		 * If caches_cnt is not 0, cpu_cache_level data
+		 * was allocated when building the topology.
+		 * Free the allocated data before returning.
+		 */
+		if (caches_cnt)
+			goto free_caches;
+
+		return ret;
+	}
+
+	if (!caches_cnt)
+		return -1;
+
+	/*
+	 * Save the data for the highest level if no
+	 * level was specified by the user.
+	 */
+	if (cache_level > MAX_CACHE_LVL) {
+		int max_level_index = 0;
+
+		for (i = 1; i < caches_cnt; ++i) {
+			if (caches[i].level > caches[max_level_index].level)
+				max_level_index = i;
+		}
+
+		cache->cache_lvl = caches[max_level_index].level;
+		cache->cache = cpu__get_cache_id_from_map(cpu, caches[max_level_index].map);
+
+		/* Reset i to 0 to free entire caches[] */
+		i = 0;
+		goto free_caches;
+	}
+
+	for (i = 0; i < caches_cnt; ++i) {
+		if (caches[i].level == cache_level) {
+			cache->cache_lvl = cache_level;
+			cache->cache = cpu__get_cache_id_from_map(cpu, caches[i].map);
+		}
+
+		cpu_cache_level__free(&caches[i]);
+	}
+
+free_caches:
+	/*
+	 * Free all the allocated cpu_cache_level data.
+	 */
+	while (i < caches_cnt)
+		cpu_cache_level__free(&caches[i++]);
+
+	return ret;
+}
+
+/**
+ * aggr_cpu_id__cache - Create an aggr_cpu_id with cache instache ID, cache
+ * level, die and socket populated with the cache instache ID, cache level,
+ * die and socket for cpu. The function signature is compatible with
+ * aggr_cpu_id_get_t.
+ */
+static struct aggr_cpu_id aggr_cpu_id__cache(struct perf_cpu cpu, void *data)
+{
+	int ret;
+	struct aggr_cpu_id id;
+	struct perf_cache cache;
+
+	id = aggr_cpu_id__die(cpu, data);
+	if (aggr_cpu_id__is_empty(&id))
+		return id;
+
+	ret = cpu__get_cache_details(cpu, &cache);
+	if (ret)
+		return id;
+
+	id.cache_lvl = cache.cache_lvl;
+	id.cache = cache.cache;
+	return id;
+}
+
 static const char *const aggr_mode__string[] = {
 	[AGGR_CORE] = "core",
+	[AGGR_CACHE] = "cache",
 	[AGGR_DIE] = "die",
 	[AGGR_GLOBAL] = "global",
 	[AGGR_NODE] = "node",
@@ -1272,6 +1398,12 @@ static struct aggr_cpu_id perf_stat__get_die(struct perf_stat_config *config __m
 	return aggr_cpu_id__die(cpu, /*data=*/NULL);
 }
 
+static struct aggr_cpu_id perf_stat__get_cache_id(struct perf_stat_config *config __maybe_unused,
+						  struct perf_cpu cpu)
+{
+	return aggr_cpu_id__cache(cpu, /*data=*/NULL);
+}
+
 static struct aggr_cpu_id perf_stat__get_core(struct perf_stat_config *config __maybe_unused,
 					      struct perf_cpu cpu)
 {
@@ -1324,6 +1456,12 @@ static struct aggr_cpu_id perf_stat__get_die_cached(struct perf_stat_config *con
 	return perf_stat__get_aggr(config, perf_stat__get_die, cpu);
 }
 
+static struct aggr_cpu_id perf_stat__get_cache_id_cached(struct perf_stat_config *config,
+							 struct perf_cpu cpu)
+{
+	return perf_stat__get_aggr(config, perf_stat__get_cache_id, cpu);
+}
+
 static struct aggr_cpu_id perf_stat__get_core_cached(struct perf_stat_config *config,
 						     struct perf_cpu cpu)
 {
@@ -1355,6 +1493,8 @@ static aggr_cpu_id_get_t aggr_mode__get_aggr(enum aggr_mode aggr_mode)
 		return aggr_cpu_id__socket;
 	case AGGR_DIE:
 		return aggr_cpu_id__die;
+	case AGGR_CACHE:
+		return aggr_cpu_id__cache;
 	case AGGR_CORE:
 		return aggr_cpu_id__core;
 	case AGGR_NODE:
@@ -1378,6 +1518,8 @@ static aggr_get_id_t aggr_mode__get_id(enum aggr_mode aggr_mode)
 		return perf_stat__get_socket_cached;
 	case AGGR_DIE:
 		return perf_stat__get_die_cached;
+	case AGGR_CACHE:
+		return perf_stat__get_cache_id_cached;
 	case AGGR_CORE:
 		return perf_stat__get_core_cached;
 	case AGGR_NODE:
@@ -1490,6 +1632,60 @@ static struct aggr_cpu_id perf_env__get_die_aggr_by_cpu(struct perf_cpu cpu, voi
 	return id;
 }
 
+static void perf_env__get_cache_id_for_cpu(struct perf_cpu cpu, struct perf_env *env,
+					   u32 cache_level, struct aggr_cpu_id *id)
+{
+	int i;
+	int caches_cnt = env->caches_cnt;
+	struct cpu_cache_level *caches = env->caches;
+
+	id->cache_lvl = (cache_level > MAX_CACHE_LVL) ? 0 : cache_level;
+	id->cache = -1;
+
+	if (!caches_cnt)
+		return;
+
+	for (i = caches_cnt - 1; i > -1; --i) {
+		struct perf_cpu_map *cpu_map;
+		int map_contains_cpu;
+
+		/*
+		 * If user has not specified a level, find the fist level with
+		 * the cpu in the map. Since building the map is expensive, do
+		 * this only if levels match.
+		 */
+		if (cache_level <= MAX_CACHE_LVL && caches[i].level != cache_level)
+			continue;
+
+		cpu_map = perf_cpu_map__new(caches[i].map);
+		map_contains_cpu = perf_cpu_map__idx(cpu_map, cpu);
+		perf_cpu_map__put(cpu_map);
+
+		if (map_contains_cpu != -1) {
+			id->cache_lvl = caches[i].level;
+			id->cache = cpu__get_cache_id_from_map(cpu, caches[i].map);
+			return;
+		}
+	}
+}
+
+static struct aggr_cpu_id perf_env__get_cache_aggr_by_cpu(struct perf_cpu cpu,
+							  void *data)
+{
+	struct perf_env *env = data;
+	struct aggr_cpu_id id = aggr_cpu_id__empty();
+
+	if (cpu.cpu != -1) {
+		u32 cache_level = (perf_stat.aggr_level) ?: stat_config.aggr_level;
+
+		id.socket = env->cpu[cpu.cpu].socket_id;
+		id.die = env->cpu[cpu.cpu].die_id;
+		perf_env__get_cache_id_for_cpu(cpu, env, cache_level, &id);
+	}
+
+	return id;
+}
+
 static struct aggr_cpu_id perf_env__get_core_aggr_by_cpu(struct perf_cpu cpu, void *data)
 {
 	struct perf_env *env = data;
@@ -1558,6 +1754,12 @@ static struct aggr_cpu_id perf_stat__get_die_file(struct perf_stat_config *confi
 	return perf_env__get_die_aggr_by_cpu(cpu, &perf_stat.session->header.env);
 }
 
+static struct aggr_cpu_id perf_stat__get_cache_file(struct perf_stat_config *config __maybe_unused,
+						    struct perf_cpu cpu)
+{
+	return perf_env__get_cache_aggr_by_cpu(cpu, &perf_stat.session->header.env);
+}
+
 static struct aggr_cpu_id perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused,
 						   struct perf_cpu cpu)
 {
@@ -1589,6 +1791,8 @@ static aggr_cpu_id_get_t aggr_mode__get_aggr_file(enum aggr_mode aggr_mode)
 		return perf_env__get_socket_aggr_by_cpu;
 	case AGGR_DIE:
 		return perf_env__get_die_aggr_by_cpu;
+	case AGGR_CACHE:
+		return perf_env__get_cache_aggr_by_cpu;
 	case AGGR_CORE:
 		return perf_env__get_core_aggr_by_cpu;
 	case AGGR_NODE:
@@ -1612,6 +1816,8 @@ static aggr_get_id_t aggr_mode__get_id_file(enum aggr_mode aggr_mode)
 		return perf_stat__get_socket_file;
 	case AGGR_DIE:
 		return perf_stat__get_die_file;
+	case AGGR_CACHE:
+		return perf_stat__get_cache_file;
 	case AGGR_CORE:
 		return perf_stat__get_core_file;
 	case AGGR_NODE:
@@ -2127,7 +2333,8 @@ static struct perf_stat perf_stat = {
 		.stat		= perf_event__process_stat_event,
 		.stat_round	= process_stat_round_event,
 	},
-	.aggr_mode = AGGR_UNSET,
+	.aggr_mode	= AGGR_UNSET,
+	.aggr_level	= 0,
 };
 
 static int __cmd_report(int argc, const char **argv)