diff --git a/imperative/python/src/helper.h b/imperative/python/src/helper.h
index 6a2fb1c938c6d15b2064fa11a336860397410f9a..b9f61e3d431c463c9039dab51113d4d55d8bd2e6 100644
--- a/imperative/python/src/helper.h
+++ b/imperative/python/src/helper.h
@@ -67,6 +67,12 @@ auto to_tuple(T begin, T end, pybind11::return_value_policy policy = pybind11::r
 class PyTaskDipatcher {
     struct Queue : mgb::AsyncQueueSC<std::function<void(void)>, Queue> {
         using Task = std::function<void(void)>;
+
+        // set max_spin=0 to prevent Queue fetch task in busy wait manner.
+        // this won't affect throughput when python interpreter is sending enough task,
+        // but will significantly save CPU time when waiting for task, e.g. wait for data input
+        Queue() : mgb::AsyncQueueSC<std::function<void(void)>, Queue>(0) {}
+
         void process_one_task(Task& f) {
             if (!Py_IsInitialized()) return;
             pybind11::gil_scoped_acquire _;
diff --git a/imperative/src/impl/interpreter_impl.h b/imperative/src/impl/interpreter_impl.h
index c1dd8447d77ff717d863bfa5bc381c58bc954abf..4a5e3fe9eb846a4038ebfc2f4caba61b14d2d7e8 100644
--- a/imperative/src/impl/interpreter_impl.h
+++ b/imperative/src/impl/interpreter_impl.h
@@ -207,7 +207,11 @@ private:
     size_t m_enable_evict = 0;
 
     struct WorkQueue : AsyncQueueSC<Command, WorkQueue> {
-        WorkQueue(ChannelImpl* owner) : m_owner(owner) {
+        // set max_spin=0 to prevent Queue fetch task in busy wait manner.
+        // this won't affect throughput when python interpreter is sending enough task,
+        // but will significantly save CPU time when waiting for task, e.g. wait for data input
+        WorkQueue(ChannelImpl* owner)
+                : AsyncQueueSC<Command, WorkQueue>(0), m_owner(owner) {
             sys::set_thread_name("interpreter");
         }
         void process_one_task(Command& cmd) {
diff --git a/imperative/src/impl/physical_tensor.cpp b/imperative/src/impl/physical_tensor.cpp
index 19fa9a29016afa4c565eb47d05ed139ad5428e5f..b4a76626d4cbf9ca7df932a6b376f0e6f3dfeb5a 100644
--- a/imperative/src/impl/physical_tensor.cpp
+++ b/imperative/src/impl/physical_tensor.cpp
@@ -30,7 +30,10 @@ class AsyncReleaser : public CompNodeDepedentObject {
         AsyncReleaser* m_par_releaser;
 
     public:
-        Waiter(AsyncReleaser* releaser) : m_par_releaser(releaser) {}
+        // disable busy wait by set max_spin=0 to save CPU cycle
+        Waiter(AsyncReleaser* releaser)
+                : AsyncQueueSC<WaiterParam, Waiter>(0),
+                  m_par_releaser(releaser) {}
 
         void process_one_task(WaiterParam& param) {
             if (param.event->finished()) {