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Optimize frozen tensorflow graph using TensorRT
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import os | |
import tensorflow as tf | |
import tensorflow.contrib.tensorrt as trt | |
def get_frozen_graph(graph_file): | |
"""Read Frozen Graph file from disk.""" | |
with tf.gfile.FastGFile(graph_file, "rb") as f: | |
graph_def = tf.GraphDef() | |
graph_def.ParseFromString(f.read()) | |
return graph_def | |
def main(): | |
frozen_graph_def = get_frozen_graph('log/freeze_graph.pb') | |
output_nodes = ['softmax_tensor'] | |
output_dir = 'tensorrt_dir' | |
trt_graph_def = trt.create_inference_graph( | |
frozen_graph_def, | |
output_nodes, | |
max_batch_size=1, | |
max_workspace_size_bytes=(2 << 10) << 20, | |
precision_mode='FP32') | |
tf.reset_default_graph() | |
g = tf.Graph() | |
with g.as_default(): | |
tf.import_graph_def( | |
graph_def=trt_graph_def, | |
return_elements=output_nodes, | |
name='' | |
) | |
with tf.Session(graph=g) as sess: | |
builder = tf.saved_model.builder.SavedModelBuilder(output_dir) | |
builder.add_meta_graph_and_variables( | |
sess, | |
[tf.saved_model.tag_constants.SERVING] | |
) | |
builder.save() | |
train_writer = tf.summary.FileWriter(output_dir) | |
train_writer.add_graph(sess.graph) | |
if __name__ == '__main__': | |
main() |
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