diff --git a/dnn/src/atlas/megcore/computing_context.cpp b/dnn/src/atlas/megcore/computing_context.cpp
index 715dcc77dba5fb86c47483c504b348a5413bc698..69b4d3b620cc546666dcd0ca63e43a13e60dac14 100644
--- a/dnn/src/atlas/megcore/computing_context.cpp
+++ b/dnn/src/atlas/megcore/computing_context.cpp
@@ -41,26 +41,22 @@ AtlasComputingContext::~AtlasComputingContext() {
 void AtlasComputingContext::memcpy(void* dst, const void* src,
                                    size_t size_in_bytes,
                                    megcoreMemcpyKind_t kind) {
-    aclrtMemcpyKind atlas_kind;
     switch (kind) {
         case megcoreMemcpyDeviceToHost:
-            atlas_kind = ACL_MEMCPY_DEVICE_TO_HOST;
+            acl_check(aclrtMemcpy(dst, size_in_bytes, src, size_in_bytes,
+                               ACL_MEMCPY_DEVICE_TO_HOST));
             break;
         case megcoreMemcpyHostToDevice:
-            atlas_kind = ACL_MEMCPY_HOST_TO_DEVICE;
+            acl_check(aclrtMemcpy(dst, size_in_bytes, src, size_in_bytes,
+                        ACL_MEMCPY_HOST_TO_DEVICE));
             break;
         case megcoreMemcpyDeviceToDevice:
-            atlas_kind = ACL_MEMCPY_DEVICE_TO_DEVICE;
+            acl_check(aclrtMemcpyAsync(dst, size_in_bytes, src, size_in_bytes,
+                ACL_MEMCPY_DEVICE_TO_DEVICE, m_ctx.stream));
             break;
         default:
             megdnn_throw("bad atlas memcpy kind");
     }
-#if MGB_USE_ATLAS_ASYNC_API
-    acl_check(aclrtMemcpyAsync(dst, size_in_bytes, src, size_in_bytes,
-                               atlas_kind, m_ctx.stream));
-#else
-    acl_check(aclrtMemcpy(dst, size_in_bytes, src, size_in_bytes, atlas_kind));
-#endif
 }
 
 void AtlasComputingContext::memset(void* dst, int value, size_t size_in_bytes) {
@@ -69,11 +65,7 @@ void AtlasComputingContext::memset(void* dst, int value, size_t size_in_bytes) {
 }
 
 void AtlasComputingContext::synchronize() {
-#if MGB_USE_ATLAS_ASYNC_API
     acl_check(aclrtSynchronizeStream(m_ctx.stream));
-#else
-    return;
-#endif
 }
 
 // vim: syntax=cpp.doxygen
diff --git a/src/core/impl/comp_node/atlas/comp_node.cpp b/src/core/impl/comp_node/atlas/comp_node.cpp
index 4b7a03d5b7d08a76ecc251d9addd4b450cd4d9b7..1f64bf0eb9990859478a2bee6142e034cc8cb492 100644
--- a/src/core/impl/comp_node/atlas/comp_node.cpp
+++ b/src/core/impl/comp_node/atlas/comp_node.cpp
@@ -230,10 +230,10 @@ void AtlasCompNodeImpl::peer_copy_to(Impl* dest_impl, void* dest,
         auto&& src_env = m_env.atlas_env();
         activate();
         if (dst_env.device == src_env.device) {
-#if MGB_USE_ATLAS_ASYNC_API
-        MGB_ATLAS_CHECK(aclrtMemcpyAsync(dest, size, src, size,
-                                         ACL_MEMCPY_DEVICE_TO_DEVICE,
-                                         dst_env.stream));
+#if 1
+            MGB_ATLAS_CHECK(aclrtMemcpyAsync(dest, size, src, size,
+                                             ACL_MEMCPY_DEVICE_TO_DEVICE,
+                                             dst_env.stream));
 #else
             MGB_ATLAS_CHECK(aclrtMemcpy(dest, size, src, size,
                                              ACL_MEMCPY_DEVICE_TO_DEVICE));
diff --git a/src/opr/impl/atlas_runtime_op.cpp b/src/opr/impl/atlas_runtime_op.cpp
index 7853545a2ec9f28fc27fd9e814637ca04ec38246..051a2c8f2fd6692ecd8bf288f4561a531dbac744 100644
--- a/src/opr/impl/atlas_runtime_op.cpp
+++ b/src/opr/impl/atlas_runtime_op.cpp
@@ -361,6 +361,7 @@ void AtlasRuntimeOpr::scn_do_execute() {
                        i, output(i)->cname());
             aclmdlAddDatasetBuffer(model_outputs, output_db);
         }
+
         MGB_ATLAS_CHECK(aclmdlExecute(m_model_id, model_inputs, model_outputs));
 
         for (size_t i = 0; i < nr_inputs; ++i) {