diff --git a/mnn-sync/src/lib.rs b/mnn-sync/src/lib.rs
index 6ea8747..c9690ef 100644
--- a/mnn-sync/src/lib.rs
+++ b/mnn-sync/src/lib.rs
@@ -77,12 +77,18 @@ impl SessionHandle {
         let (tx, rx) = flume::unbounded();
         let handle = builder
             .spawn(move || -> Result<()> {
+                #[cfg(feature = "tracing")]
+                tracing::info!("Starting mnn session thread");
                 let mut session = interpreter.create_session(config)?;
+                #[cfg(feature = "tracing")]
+                tracing::info!("Updating mnn cache file");
                 interpreter.update_cache_file(&mut session);
                 let mut session_runner = SessionRunner {
                     interpreter,
                     session,
                 };
+                #[cfg(feature = "tracing")]
+                tracing::info!("Starting mnn session loop");
                 loop {
                     let f = receiver
                         .recv()