Add more BF16 ops support on stock tensorflow (#792)

Signed-off-by: Lv, Liang1 <liang1.lv@intel.com>

neural_compressor/adaptor/tensorflow.py

@@ -722,6 +722,7 @@ def _query_quantizable_ops(self, matched_nodes):
         fp32_common_config = {'weight': {'dtype': 'fp32'}, 'activation': {'dtype': 'fp32'}}
         uint8_type = self.query_handler.get_op_types_by_precision(precision='uint8')
         int8_type = self.query_handler.get_op_types_by_precision(precision='int8')
+        bf16_type = self.query_handler.get_op_types_by_precision(precision='bf16')
         tf_quantizable_op_type = list(set(uint8_type).union(set(int8_type)))
 
         valid_precision = self.query_handler.get_mixed_precision_combination()
@@ -792,7 +793,8 @@ def _query_quantizable_ops(self, matched_nodes):
                     self.quantizable_op_details[(
                         node_name, self.unify_op_type_mapping[node_op]
                     )] = [copy.deepcopy(other_config), fp32_common_config]
-                if ('bf16' in valid_precision and CpuInfo().bf16) or os.getenv('FORCE_BF16') == '1':
+                if node_op in bf16_type and (('bf16' in valid_precision and CpuInfo().bf16) \
+                         or os.getenv('FORCE_BF16') == '1'):
                     self.quantizable_op_details[(
                         node_name, self.unify_op_type_mapping[node_op]
                     )].insert(1, bf16_common_config)
@@ -2228,7 +2230,7 @@ def get_op_types_by_precision(self, precision):
                 return self.cur_config[precision]
             if version1_gte_version2(tf.version.VERSION, '2.1.0') or \
                version1_eq_version2(tf.version.VERSION, '1.15.0-up3'):
-                return ['Conv2D']
+                return self.cur_config[precision]
             return []
 
     def get_mixed_precision_combination(self):

neural_compressor/adaptor/tensorflow.yaml

@@ -153,7 +153,7 @@
   version:
     name: ['2.1.0', '2.2.0', '2.3.0', '2.4.0', '2.5.0', '2.6.0', '2.6.1', '2.6.2', '2.7.0', '2.8.0', '2.9.0', '2.9.1', '2.10.0', '2.11.0', '1.15.0-up1', '1.15.0-up2', 1.15.0-up3]
 
-  bf16: ['Conv2D']
+  bf16: ['Conv2D', 'Conv3D', 'MatMul', 'BatchMatMul', 'MaxPool', 'MaxPool3D', 'AvgPool', 'AvgPool3D', 'DepthwiseConv2dNative']
   fp32: ['*'] # '*' means all op types
 
   int8: {

neural_compressor/adaptor/tf_utils/graph_rewriter/bf16/bf16_convert.py

@@ -34,6 +34,8 @@
 from neural_compressor.adaptor.tf_utils.graph_util import GraphRewriterHelper as Helper
 from ..generic.graph_cse_optimizer import GraphCseOptimizer
 from ..generic.dequantize_cast_optimizer import DequantizeCastOptimizer
+import tensorflow as tf
+from neural_compressor.adaptor.tf_utils.util import TF_SPR_BASE_VERSIONS
 
 DT_FLOAT32  = attr_value_pb2.AttrValue(type=dtypes.float32.as_datatype_enum)
 DT_BFLOAT16 = attr_value_pb2.AttrValue(type=dtypes.bfloat16.as_datatype_enum)
@@ -179,7 +181,8 @@ def _bf16_convert(self, bf16_node_name):
                     tensor=tensor_util.make_tensor_proto(
                         fp32_value, dtypes.bfloat16, fp32_value.shape)))
             elif 'Dequantize' == input_node.op and len(input_node_outputs) == 1 \
-                                                        and input_node.attr['mode'].s != b'MIN_FIRST':
+                                and input_node.attr['mode'].s != b'MIN_FIRST' \
+                                and tf.version.VERSION in TF_SPR_BASE_VERSIONS:
                 # Dequantize with mode MIN_FIRST does not support bf16 in both eigen and mkl
                 _, outputs_dt_input_node = self._dtype(input_node)
                 allowed_input_node_dt_val = self._allowed_dtype_val(input_node)

neural_compressor/adaptor/tf_utils/graph_rewriter/generic/dequantize_cast_optimizer.py

@@ -21,8 +21,10 @@
 
 from ..graph_base import GraphRewriterBase
 from neural_compressor.adaptor.tf_utils.graph_util import GraphAnalyzer
-from neural_compressor.adaptor.tf_utils.graph_util import GraphRewriterHelper as Helper
 from neural_compressor.utils.utility import dump_elapsed_time
+import tensorflow as tf
+from neural_compressor.adaptor.tf_utils.util import TF_SPR_BASE_VERSIONS
+
 class DequantizeCastOptimizer(GraphRewriterBase):
     """Remove the Cast OP and set Dequantize output to B16 if the Cast OP output is BF16."""
 
@@ -36,6 +38,11 @@ def do_transformation(self):
         Returns:
             [graphdef]: optimized graph
         """
+        # stock TF _MklDequantize doesn't support BF16 currently.
+        # TODO remove this when spr-base upstream to stock TF.
+        if not tf.version.VERSION in TF_SPR_BASE_VERSIONS:
+            return self.model
+
         DT_BFLOAT16 = attr_value_pb2.AttrValue(type=dtypes.bfloat16.as_datatype_enum)
         cur_graph = GraphAnalyzer()
         cur_graph.graph = self.model

test/adaptor/tensorflow_adaptor/test_tensorflow_graph_dequantize_cast_optimizer.py

@@ -67,7 +67,10 @@ def test_dequantize_cast_normal(self):
         graph_def = build_fake_graphdef()
         converted_graph_def = DequantizeCastOptimizer(graph_def).do_transformation()
         for i in converted_graph_def.node:
-            self.assertNotEqual(i.op, 'Cast')
+            if i.op == 'Cast':
+                hasCast = True
+                break
+        self.assertEqual(hasCast, True)
 
     @disable_random()
     def test_dequantize_cast_min_first(self):

test/adaptor/tensorflow_adaptor/test_tensorflow_query_yaml.py

@@ -52,7 +52,9 @@ def build_fake_framework_yaml():
 ---
 -
   version:
-    name: ['2.1.0', '2.2.0', '2.3.0', '2.4.0', '2.5.0', '2.6.0', '2.7.0']  
+    name: ['2.1.0', '2.2.0', '2.3.0', '2.4.0', '2.5.0', '2.6.0', '2.7.0']
+
+  bf16: ['Conv2D', 'MatMul', 'ConcatV2', 'MaxPool', 'AvgPool', 'DepthwiseConv2dNative']
 
   int8: { 
     'static': {
@@ -93,6 +95,8 @@ def build_fake_framework_yaml():
   version:
     name: ['default']  
 
+  bf16: ['Conv2D', 'MatMul', 'ConcatV2', 'MaxPool', 'AvgPool', 'DepthwiseConv2dNative']
+
   int8: { 
     'static': {
         'Conv2D': {

test/tfnewapi/test_tensorflow_graph_dequantize_cast_optimizer_newapi.py

@@ -0,0 +1,96 @@
+import unittest
+import os
+import yaml
+import numpy as np
+import tensorflow as tf
+from tensorflow.python.framework import dtypes
+from neural_compressor.adaptor.tf_utils.util import disable_random
+from neural_compressor.adaptor.tf_utils.graph_util import GraphRewriterHelper as Helper
+from neural_compressor.adaptor.tf_utils.graph_rewriter.generic.dequantize_cast_optimizer import DequantizeCastOptimizer
+
+def build_fake_graphdef(set_min_first=False, dq_multi_outputs=False):
+    tf.compat.v1.disable_eager_execution()
+
+    input = tf.compat.v1.placeholder(tf.float32, shape=(32, 224, 224, 3), name='input')
+    graph_def = tf.compat.v1.get_default_graph().as_graph_def(add_shapes=True)
+
+    min_input = Helper.create_constant_node(
+        'test_min',
+        value=0.,
+        dtype=dtypes.float32)
+
+    max_input = Helper.create_constant_node(
+        'test_max',
+        value=[1],
+        dtype=dtypes.float32)
+
+    quant_v2_node = Helper.create_node("QuantizeV2", 'test_quantize',
+            [input.name, min_input.name, max_input.name])
+
+    dequantize_node = Helper.create_node(
+                "Dequantize", 'test_dequantize',
+                [quant_v2_node.name, quant_v2_node.name + ':1', quant_v2_node.name + ':2'])
+    if set_min_first:
+        Helper.set_attr_string(dequantize_node, "mode", b'MIN_FIRST')
+
+    cast_node = Helper.create_node(
+                "Cast", 'test_cast', [dequantize_node.name])
+    Helper.set_attr_dtype(cast_node, "DstT", dtypes.bfloat16)
+    Helper.set_attr_dtype(cast_node, "SrcT", dtypes.float32)
+    Helper.set_attr_bool(cast_node, "Truncate", False)
+
+    dentity_node = Helper.create_node(
+                "Identity", 'output', [cast_node.name])
+    Helper.set_attr_dtype(dentity_node, "T", dtypes.bfloat16)
+
+    graph_def.node.extend([
+        min_input,
+        max_input,
+        quant_v2_node,
+        dequantize_node,
+        cast_node,
+        dentity_node,
+    ])
+
+    if dq_multi_outputs:
+        dentity_node_2 = Helper.create_node(
+            "Identity", 'id_1', [dequantize_node.name])
+        Helper.set_attr_dtype(dentity_node_2, "T", dtypes.float32)
+        graph_def.node.extend([dentity_node_2])
+
+    return graph_def
+
+class TestDequantizeCastOptimizer(unittest.TestCase):
+
+    @disable_random()
+    def test_dequantize_cast_normal(self):
+        graph_def = build_fake_graphdef()
+        converted_graph_def = DequantizeCastOptimizer(graph_def).do_transformation()
+        for i in converted_graph_def.node:
+            self.assertNotEqual(i.op, 'Cast')
+
+    @disable_random()
+    def test_dequantize_cast_min_first(self):
+        graph_def = build_fake_graphdef(set_min_first=True)
+        converted_graph_def = DequantizeCastOptimizer(graph_def).do_transformation()
+        hasCast = False
+        for i in converted_graph_def.node:
+            if i.op == 'Cast':
+                hasCast = True
+                break
+        self.assertEqual(hasCast, True)
+
+    @disable_random()
+    def test_dequantize_cast_multiple_outputs(self):
+        graph_def = build_fake_graphdef(dq_multi_outputs=True)
+        converted_graph_def = DequantizeCastOptimizer(graph_def).do_transformation()
+        hasCast = False
+        for i in converted_graph_def.node:
+            if i.op == 'Cast':
+                hasCast = True
+                break
+        self.assertEqual(hasCast, True)
+
+
+if __name__ == "__main__":
+    unittest.main()