diff --git a/src/unix/core.c b/src/unix/core.c
index 1a2eb5a3172089d1f08dd2e03c1fa0cdae9ed11b..c43a39de2bd09ee45b76e0c08391d9e776fc3583 100644
--- a/src/unix/core.c
+++ b/src/unix/core.c
@@ -444,15 +444,18 @@ int uv_run(uv_loop_t* loop, uv_run_mode mode) {
   if (!r)
     uv__update_time(loop);
 
+  UV_LOGI("start to run loop %{public}zu", (size_t)loop);
+
   while (r != 0 && loop->stop_flag == 0) {
 #ifdef USE_FFRT
     if (!is_uv_loop_good_magic(loop)) {
       return 0;
     }
 #endif
-
+    UV_LOGI("start to handle timer tasks, loop %{public}zu", (size_t)loop);
     uv__update_time(loop);
     uv__run_timers(loop);
+    UV_LOGI("handle timer tasks finished, loop %{public}zu", (size_t)loop);
 
     can_sleep =
         uv__queue_empty(&loop->pending_queue) &&
@@ -509,6 +512,7 @@ int uv_run(uv_loop_t* loop, uv_run_mode mode) {
   if (loop->stop_flag != 0)
     loop->stop_flag = 0;
 
+  UV_LOGI("loop %{public}zu stopped", (size_t)loop);
   return r;
 }