!20684 Fix for weight change watchpoint cannot find previous value and async dump make unexisting root_graph_id directories issues

Merge pull request !20684 from parastooashtari/offline_watchpoint

mindspore/ccsrc/backend/session/ascend_session.cc

@@ -1127,9 +1127,13 @@ void AscendSession::Execute(const std::shared_ptr<KernelGraph> &kernel_graph, bo
   }
   auto runtime_instance = device::KernelRuntimeManager::Instance().GetKernelRuntime(kAscendDevice, device_id_);
   MS_EXCEPTION_IF_NULL(runtime_instance);
-  DumpSetup(kernel_graph);
+  if (is_task) {
+    DumpSetup(kernel_graph);
+  }
   bool ret_ok = runtime_instance->Run(kernel_graph.get(), is_task_sink);
-  Dump(kernel_graph);
+  if (is_task) {
+    Dump(kernel_graph);
+  }
   if (!ret_ok) {
 #ifdef ENABLE_DUMP_IR
     mindspore::RDR::TriggerAll();

mindspore/ccsrc/debug/debug_services.cc

@@ -128,7 +128,7 @@ std::unique_ptr<ITensorSummary> GetSummaryPtr(const std::shared_ptr<TensorData>
 void *DebugServices::GetPrevTensor(const std::shared_ptr<TensorData> &tensor, bool previous_iter_tensor_needed) {
   void *previous_tensor_ptr = nullptr;
   std::shared_ptr<TensorData> tensor_prev;
-  if (previous_iter_tensor_needed && tensor->GetIteration() > 1) {
+  if (previous_iter_tensor_needed && tensor->GetIteration() >= 1) {
     // read data in offline mode
     std::vector<std::string> file_paths;
     if (!is_sync_mode) {