chore: Add tokio metrics to the app

mobile/native/Cargo.toml

@@ -34,7 +34,8 @@ serde_json = "1"
 state = "0.5.3"
 thiserror = "1"
 time = { version = "0.3.20", features = ["formatting"] }
-tokio = { version = "1.25.0", features = ["macros", "rt", "rt-multi-thread", "sync", "time"] }
+tokio = { version = "1.25.0", features = ["macros", "rt", "rt-multi-thread", "sync", "time", "tracing"] }
+tokio-metrics = "0.2.2"
 tracing = "0.1.37"
 tracing-subscriber = { version = "0.3", default-features = false, features = ["fmt", "env-filter", "time", "json"] }
 trade = { path = "../../crates/trade" }

mobile/native/src/api.rs

@@ -248,6 +248,19 @@ pub fn run(
     config::set(config.clone());
     db::init_db(&app_dir, get_network())?;
     let runtime = ln_dlc::get_or_create_tokio_runtime()?;
+
+    // TODO: Hide this behind some debug flag, it shouldn't run in production
+    // (or maybe log once a minute in release build?)
+    let handle = runtime.handle();
+    let runtime_monitor = tokio_metrics::RuntimeMonitor::new(handle);
+    let frequency = Duration::from_secs(5);
+    runtime.spawn(async move {
+        for metrics in runtime_monitor.intervals() {
+            tracing::debug!(?metrics, "tokio metrics");
+            tokio::time::sleep(frequency).await;
+        }
+    });
+
     ln_dlc::run(app_dir, seed_dir, runtime)?;
 
     let (_health, tx) = health::Health::new(config, runtime);