perf cpumap: Add CPU to aggr_cpu_id

With no aggregration, such as 'perf stat -A', the aggr_cpu_id lacks a
way to describe per CPU aggregation and the core is set to the CPU in
places like print_counter_aggrdata in stat-display.c.

Setting the core to the CPU is undesirable as the CPU will exceed valid
core values and lead to confusion. Add a CPU variable to address this.
Signed-off-by: Ian Rogers <irogers@google.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@redhat.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Riccardo Mancini <rickyman7@gmail.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Vineet Singh <vineet.singh@intel.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: zhengjun.xing@intel.com
Link: https://lore.kernel.org/r/20220105061351.120843-25-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/tests/topology.c

@@ -119,6 +119,22 @@ static int check_cpu_topology(char *path, struct perf_cpu_map *map)
 			 session->header.env.cpu[i].socket_id);
 	}
 
+	// Test that CPU ID contains socket, die, core and CPU
+	for (i = 0; i < map->nr; i++) {
+		id = aggr_cpu_id__cpu(perf_cpu_map__cpu(map, i), NULL);
+		TEST_ASSERT_VAL("Cpu map - CPU ID doesn't match", map->map[i] == id.cpu);
+
+		TEST_ASSERT_VAL("Cpu map - Core ID doesn't match",
+			session->header.env.cpu[map->map[i]].core_id == id.core);
+		TEST_ASSERT_VAL("Cpu map - Socket ID doesn't match",
+			session->header.env.cpu[map->map[i]].socket_id == id.socket);
+
+		TEST_ASSERT_VAL("Cpu map - Die ID doesn't match",
+			session->header.env.cpu[map->map[i]].die_id == id.die);
+		TEST_ASSERT_VAL("Cpu map - Node ID is set", id.node == -1);
+		TEST_ASSERT_VAL("Cpu map - Thread is set", id.thread == -1);
+	}
+
 	// Test that core ID contains socket, die and core
 	for (i = 0; i < map->nr; i++) {
 		id = aggr_cpu_id__core(perf_cpu_map__cpu(map, i), NULL);
@@ -145,6 +161,7 @@ static int check_cpu_topology(char *path, struct perf_cpu_map *map)
 
 		TEST_ASSERT_VAL("Die map - Node ID is set", id.node == -1);
 		TEST_ASSERT_VAL("Die map - Core is set", id.core == -1);
+		TEST_ASSERT_VAL("Die map - CPU is set", id.cpu == -1);
 		TEST_ASSERT_VAL("Die map - Thread is set", id.thread == -1);
 	}
 
@@ -157,6 +174,7 @@ static int check_cpu_topology(char *path, struct perf_cpu_map *map)
 		TEST_ASSERT_VAL("Socket map - Node ID is set", id.node == -1);
 		TEST_ASSERT_VAL("Socket map - Die ID is set", id.die == -1);
 		TEST_ASSERT_VAL("Socket map - Core is set", id.core == -1);
+		TEST_ASSERT_VAL("Socket map - CPU is set", id.cpu == -1);
 		TEST_ASSERT_VAL("Socket map - Thread is set", id.thread == -1);
 	}
 
@@ -168,6 +186,7 @@ static int check_cpu_topology(char *path, struct perf_cpu_map *map)
 		TEST_ASSERT_VAL("Node map - Socket is set", id.socket == -1);
 		TEST_ASSERT_VAL("Node map - Die ID is set", id.die == -1);
 		TEST_ASSERT_VAL("Node map - Core is set", id.core == -1);
+		TEST_ASSERT_VAL("Node map - CPU is set", id.cpu == -1);
 		TEST_ASSERT_VAL("Node map - Thread is set", id.thread == -1);
 	}
 	perf_session__delete(session);

tools/perf/util/cpumap.c

@@ -242,7 +242,7 @@ struct aggr_cpu_id aggr_cpu_id__core(int cpu, void *data)
 	struct aggr_cpu_id id;
 	int core = cpu__get_core_id(cpu);
 
-	/* aggr_cpu_id__die returns a struct with socket and die set*/
+	/* aggr_cpu_id__die returns a struct with socket and die set. */
 	id = aggr_cpu_id__die(cpu, data);
 	if (aggr_cpu_id__is_empty(&id))
 		return id;
@@ -256,6 +256,20 @@ struct aggr_cpu_id aggr_cpu_id__core(int cpu, void *data)
 
 }
 
+struct aggr_cpu_id aggr_cpu_id__cpu(int cpu, void *data)
+{
+	struct aggr_cpu_id id;
+
+	/* aggr_cpu_id__core returns a struct with socket, die and core set. */
+	id = aggr_cpu_id__core(cpu, data);
+	if (aggr_cpu_id__is_empty(&id))
+		return id;
+
+	id.cpu = cpu;
+	return id;
+
+}
+
 struct aggr_cpu_id aggr_cpu_id__node(int cpu, void *data __maybe_unused)
 {
 	struct aggr_cpu_id id = aggr_cpu_id__empty();
@@ -579,7 +593,8 @@ bool aggr_cpu_id__equal(const struct aggr_cpu_id *a, const struct aggr_cpu_id *b
 		a->node == b->node &&
 		a->socket == b->socket &&
 		a->die == b->die &&
-		a->core == b->core;
+		a->core == b->core &&
+		a->cpu == b->cpu;
 }
 
 bool aggr_cpu_id__is_empty(const struct aggr_cpu_id *a)
@@ -588,7 +603,8 @@ bool aggr_cpu_id__is_empty(const struct aggr_cpu_id *a)
 		a->node == -1 &&
 		a->socket == -1 &&
 		a->die == -1 &&
-		a->core == -1;
+		a->core == -1 &&
+		a->cpu == -1;
 }
 
 struct aggr_cpu_id aggr_cpu_id__empty(void)
@@ -598,7 +614,8 @@ struct aggr_cpu_id aggr_cpu_id__empty(void)
 		.node = -1,
 		.socket = -1,
 		.die = -1,
-		.core = -1
+		.core = -1,
+		.cpu = -1
 	};
 	return ret;
 }

tools/perf/util/cpumap.h

@@ -22,6 +22,8 @@ struct aggr_cpu_id {
 	int die;
 	/** The core id as read from /sys/devices/system/cpu/cpuX/topology/core_id. */
 	int core;
+	/** CPU aggregation, note there is one CPU for each SMT thread. */
+	int cpu;
 };
 
 /** A collection of aggr_cpu_id values, the "built" version is sorted and uniqued. */
@@ -109,6 +111,12 @@ struct aggr_cpu_id aggr_cpu_id__die(int cpu, void *data);
  * compatible with aggr_cpu_id_get_t.
  */
 struct aggr_cpu_id aggr_cpu_id__core(int cpu, void *data);
+/**
+ * aggr_cpu_id__core - Create an aggr_cpu_id with the cpu, core, die and socket
+ * populated with the cpu, core, die and socket for cpu. The function signature
+ * is compatible with aggr_cpu_id_get_t.
+ */
+struct aggr_cpu_id aggr_cpu_id__cpu(int cpu, void *data);
 /**
  * aggr_cpu_id__node - Create an aggr_cpu_id with the numa node populated for
  * cpu. The function signature is compatible with aggr_cpu_id_get_t.