diff --git a/ge/graph/load/model_manager/davinci_model.cc b/ge/graph/load/model_manager/davinci_model.cc
index b52796c8..4fac7b28 100755
--- a/ge/graph/load/model_manager/davinci_model.cc
+++ b/ge/graph/load/model_manager/davinci_model.cc
@@ -488,6 +488,9 @@ void DavinciModel::InitRuntimeParams() {
   session_scope_mem_info.memory_size = static_cast<size_t>(ret ? value : 0);
   runtime_param_.memory_infos[kSessionScopeMemory | RT_MEMORY_HBM] = std::move(session_scope_mem_info);
 
+  ret = ge::AttrUtils::GetInt(ge_model_, ATTR_MODEL_ZERO_COPY_MEMORY_SIZE, value);
+  runtime_param_.zero_copy_size = ret ? static_cast<size_t>value : 0;
+
   GELOGI("InitRuntimeParams(), %s.", runtime_param_.ToString().c_str());
 }
 
diff --git a/ge/graph/load/model_manager/davinci_model.h b/ge/graph/load/model_manager/davinci_model.h
index e4898dec..e362acfa 100755
--- a/ge/graph/load/model_manager/davinci_model.h
+++ b/ge/graph/load/model_manager/davinci_model.h
@@ -265,6 +265,9 @@ class DavinciModel {
 
   size_t TotalVarMemSize() const { return runtime_param_.var_size; }
 
+  // get total zero copy size
+  size_t TotalZeroCopySize() const { return runtime_param_.zero_copy_size; }
+
   // get base memory address
   uint8_t *MemBase() { return mem_base_; }
 
diff --git a/ge/graph/load/model_manager/task_info/task_info.h b/ge/graph/load/model_manager/task_info/task_info.h
index 5657f003..5a101f0d 100644
--- a/ge/graph/load/model_manager/task_info/task_info.h
+++ b/ge/graph/load/model_manager/task_info/task_info.h
@@ -49,7 +49,7 @@ struct RuntimeParam {
        << ", label_num:" << label_num << ", logic_mem_base:" << logic_mem_base
        << ", logic_weight_base:" << logic_weight_base << ", logic_var_base:" << logic_var_base
        << ", memory_size:" << mem_size << ", weight_size:" << weight_size << ", var_size:" << var_size
-       << ", ex_memory_info:";
+       << ", zero_copy_size:" << zero_copy_size << ", ex_memory_info:";
     for (auto it : memory_infos) {
       ss << "[memory_type:" << it.first << ", memory_size:" << it.second.memory_size << "]";
     }
@@ -65,6 +65,7 @@ struct RuntimeParam {
   uint64_t var_size = 0;
   uint64_t logic_var_base = 0;
   uint8_t *var_base = nullptr;
+  size_t zero_copy_size = 0;
   std::map<uint64_t, MemInfo> memory_infos;
   uint32_t batch_num = 0;
   uint32_t stream_num = 0;
diff --git a/ge/hybrid/node_executor/compiledsubgraph/known_node_executor.cc b/ge/hybrid/node_executor/compiledsubgraph/known_node_executor.cc
index c800e93d..1c666230 100755
--- a/ge/hybrid/node_executor/compiledsubgraph/known_node_executor.cc
+++ b/ge/hybrid/node_executor/compiledsubgraph/known_node_executor.cc
@@ -101,10 +101,14 @@ Status KnownNodeTask::Init(TaskContext &context) {
   GE_CHK_STATUS_RET(context.AllocateOutputs(), "[Allocate][Outputs] failed for %s.", context.GetNodeName());
   // allocate mem base
   void *buffer = nullptr;
-  if (davinci_model_->TotalMemSize() != 0) {
+  size_t total_mem_size = davinci_model_->TotalMemSize();
+  size_t total_zero_copy_size = davinci_model_->TotalZeroCopySize();
+  GELOGI("####KnownNodeTask::Init total mem size is %lu, total zero size is %lu.",
+         total_mem_size, total_zero_copy_size);
+  if (total_mem_size != 0 && total_mem_size > total_zero_copy_size) {
     RECORD_EXECUTION_EVENT(context.GetExecutionContext(), context.GetNodeName(),
                            "[KnownNodeTask_AllocateWorkspace] Start");
-    GE_CHK_STATUS_RET(context.AllocateWorkspace(davinci_model_->TotalMemSize(), &buffer,
+    GE_CHK_STATUS_RET(context.AllocateWorkspace(total_mem_size - total_zero_copy_size, &buffer,
                                                 davinci_model_->GetRuntimeParam().mem_base),
                       "[Allocate][Workspace] failed for %s.", context.GetNodeName());
     RECORD_EXECUTION_EVENT(context.GetExecutionContext(), context.GetNodeName(),