From 56aba4b747f69058ceeb4c868b2306b5fe2bfb6a Mon Sep 17 00:00:00 2001
From: lidanqing <danqing.li@intel.com>
Date: Wed, 21 Oct 2020 12:36:50 +0200
Subject: [PATCH] add FLAGS_use_mkldnn check (#28147)

---
 paddle/fluid/imperative/prepared_operator.cc | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/paddle/fluid/imperative/prepared_operator.cc b/paddle/fluid/imperative/prepared_operator.cc
index 4e0e95dd012..c58b1e9596f 100644
--- a/paddle/fluid/imperative/prepared_operator.cc
+++ b/paddle/fluid/imperative/prepared_operator.cc
@@ -20,6 +20,8 @@
 #include "paddle/fluid/imperative/infer_shape_context.h"
 #include "paddle/fluid/imperative/infer_var_type_context.h"
 
+DECLARE_bool(use_mkldnn);
+
 namespace paddle {
 namespace imperative {
 
@@ -91,8 +93,10 @@ PreparedOp PrepareOpImpl(const NameVarMap<VarType>& ins,
   // MKLDNN variant of code reads attributes in some of GetKernelTypeForVar and
   // GetKernelType functions, so we need to copy the attributes there.
   // Const qualifier of Attrs had to be discarded to overwrite it.
-  auto& mutable_op_attrs = const_cast<framework::AttributeMap&>(op.Attrs());
-  mutable_op_attrs = attrs;
+  if (FLAGS_use_mkldnn) {
+    auto& mutable_op_attrs = const_cast<framework::AttributeMap&>(op.Attrs());
+    mutable_op_attrs = attrs;
+  }
 #endif
   auto expected_kernel_key =
       op.GetExpectedKernelType(DygraphExecutionContext<VarType>(
-- 
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