Bluetooth: Make H(ost)Top

Sorry we don't have color support yet..

On the non-joke side, this option will print the number of dropped
extended advertising reports every second.

Signed-off-by: Jonathan Rico <jonathan.rico@nordicsemi.no>
Co-authored-by: Aleksander Wasaznik <aleksander.wasaznik@nordicsemi.no>

subsys/bluetooth/host/Kconfig

@@ -1048,6 +1048,12 @@ config BT_TESTING
 	  This option enables custom Bluetooth testing interface.
 	  Shall only be used for testing purposes.
 
+config BT_HTOP
+	bool "Bluetooth Statistics"
+	help
+	  Enable printing of Bluetooth performance statistics.
+	  Sort of like THREAD_ANALYZER.
+
 config BT_CONN_DISABLE_SECURITY
 	bool "Disable security"
 	depends on BT_TESTING

subsys/bluetooth/host/scan.c

@@ -866,6 +866,35 @@ static void create_ext_adv_info(struct bt_hci_evt_le_ext_advertising_info const
 	scan_info->adv_props = get_adv_props_extended(sys_le16_to_cpu(evt->evt_type));
 }
 
+#if defined(CONFIG_BT_HTOP)
+static atomic_t dropped_adv_reports;
+static struct k_thread htop_thread;
+static K_THREAD_PINNED_STACK_DEFINE(htop_thread_stack, CONFIG_MAIN_STACK_SIZE);
+
+static void htop_thread_entry(void *p1, void *p2, void *p3)
+{
+	for (;;) {
+		int reports = atomic_clear(&dropped_adv_reports);
+
+		if (reports) {
+			LOG_INF("Dropped advertising reports: %d", reports);
+		}
+
+		k_sleep(K_SECONDS(2));
+	}
+}
+
+static int sys_init_spawn_htop(void)
+{
+	k_thread_create(&htop_thread, htop_thread_stack, K_THREAD_STACK_SIZEOF(htop_thread_stack),
+			htop_thread_entry, NULL, NULL, NULL, K_HIGHEST_THREAD_PRIO, 0, K_NO_WAIT);
+	k_thread_name_set(&htop_thread, "htop");
+	return 0;
+}
+
+SYS_INIT(sys_init_spawn_htop, POST_KERNEL, 64);
+#endif
+
 static void start_discarding(struct fragmented_advertiser *a)
 {
 	if (a->report) {
@@ -874,6 +903,9 @@ static void start_discarding(struct fragmented_advertiser *a)
 	}
 
 	a->state = FRAG_ADV_DISCARDING;
+#if defined(CONFIG_BT_HTOP)
+	atomic_inc(&dropped_adv_reports);
+#endif
 }
 
 static void crash_if_corrupted(size_t report_length, size_t buffer_length)
@@ -1015,6 +1047,9 @@ static void process_unfragmented_report(struct bt_hci_evt_le_ext_advertising_inf
 					struct net_buf *report)
 {
 	if (report == NULL) {
+#if defined(CONFIG_BT_HTOP)
+		atomic_inc(&dropped_adv_reports);
+#endif
 		return;
 	}
 

tests/bsim/bluetooth/host/scan/slow/prj.conf

@@ -19,3 +19,5 @@ CONFIG_ASSERT=y
 CONFIG_THREAD_NAME=y
 CONFIG_LOG_THREAD_ID_PREFIX=y
 CONFIG_ARCH_POSIX_TRAP_ON_FATAL=y
+
+CONFIG_BT_HTOP=y