diff --git a/dnn/src/rocm/sleep/opr_impl.cpp b/dnn/src/rocm/sleep/opr_impl.cpp
index ce2a9521..71aa3c04 100644
--- a/dnn/src/rocm/sleep/opr_impl.cpp
+++ b/dnn/src/rocm/sleep/opr_impl.cpp
@@ -22,7 +22,7 @@ void SleepForwardImpl::exec() {
     double seconds = m_param.time;
     megdnn_assert(seconds > 0);
     auto hdl = static_cast<HandleImpl*>(handle());
-    sleep(hdl->stream(), hdl->device_prop().clockRate * 18.01 * seconds);
+    sleep(hdl->stream(), hdl->device_prop().clockRate * 1000 * seconds);
 }
 
 } // namespace rocm
diff --git a/src/core/impl/utils/persistent_cache.cpp b/src/core/impl/utils/persistent_cache.cpp
index ec6651e8..98e3dc2a 100644
--- a/src/core/impl/utils/persistent_cache.cpp
+++ b/src/core/impl/utils/persistent_cache.cpp
@@ -122,6 +122,17 @@ std::string PersistentCache::make_category_from_comp_node(CompNode comp_node) {
             break;
         }
 #endif
+#if MGB_ROCM
+        case CompNode::DeviceType::ROCM: {
+            int drv = -1, hip_rt = -1;
+            MGB_ROCM_CHECK(hipDriverGetVersion(&drv));
+            MGB_ROCM_CHECK(hipRuntimeGetVersion(&hip_rt));
+            auto&& prop = env.rocm_env().device_prop;
+            return ssprintf("plat=rocm;dev=%s;cap=%d.%d,drv=%d;runtime=%d",
+                            prop.name, prop.major, prop.minor, drv, hip_rt);
+            break;
+        }
+#endif
         case CompNode::DeviceType::CPU:
             return "plat=cpu";
         default: