t5-11b out of memory/FileNotFoundError

``First of all, this seems like a great repo that I was super excited to find!

When testing with t5-small everything works correctly. But when trying with my custom t5-11b I get out of memory issues.

I was running this with a t5-11b as model: onnx_model_paths = generate_onnx_representation("t5-11b",model=model)

And at first I got this error:

RuntimeError: Exporting model exceed maximum protobuf size of 2GB. Please call torch.onnx.export with use_external_data_format=True.

So I simply added use_external_data_format=True to all of the three torch.onnx.export in onnx_exporter.py in fastT5.

Then I can run onnx_model_paths = generate_onnx_representation(model_name,model=model), and get no error (First time I posted I got an error but it seems like I made an error and only had 100 GB disk memory, when trying 200 GB it worked).

Then when running quant_model_paths = quantize(onnx_model_paths) I get the error:

`FileNotFoundError                         Traceback (most recent call last)
<ipython-input-7-3a782b6d5a25> in <module>
      8 
      9 # Step 2. (recommended) quantize the converted model for fast inference and to reduce model size.
---> 10 quant_model_paths = quantize(onnx_model_paths)
     11 
     12 # step 3. setup onnx runtime

~/fastT5/fastT5/onnx_exporter.py in quantize(models_name_or_path)
    273             activation_type=QuantType.QUInt8,
    274             weight_type=QuantType.QUInt8,
--> 275             optimize_model=False,
    276         )  # op_types_to_quantize=['MatMul', 'Relu', 'Add', 'Mul' ],
    277         quant_model_paths.append(output_model_name)

/opt/conda/lib/python3.7/site-packages/onnxruntime/quantization/quantize.py in quantize_dynamic(model_input, model_output, op_types_to_quantize, per_channel, reduce_range, activation_type, weight_type, nodes_to_quantize, nodes_to_exclude, optimize_model, use_external_data_format)
    266         op_types_to_quantize = list(IntegerOpsRegistry.keys())
    267 
--> 268     model = load_model(Path(model_input), optimize_model)
    269     quantizer = ONNXQuantizer(
    270         model,

/opt/conda/lib/python3.7/site-packages/onnxruntime/quantization/quantize.py in load_model(model_path, optimize)
     51         return onnx_model.model
     52 
---> 53     return onnx.load(Path(model_path))
     54 
     55 

/opt/conda/lib/python3.7/site-packages/onnx/__init__.py in load_model(f, format, load_external_data)
    125         if model_filepath:
    126             base_dir = os.path.dirname(model_filepath)
--> 127             load_external_data_for_model(model, base_dir)
    128 
    129     return model

/opt/conda/lib/python3.7/site-packages/onnx/external_data_helper.py in load_external_data_for_model(model, base_dir)
     69     for tensor in _get_all_tensors(model):
     70         if uses_external_data(tensor):
---> 71             load_external_data_for_tensor(tensor, base_dir)
     72             # After loading raw_data from external_data, change the state of tensors
     73             tensor.data_location = TensorProto.DEFAULT

/opt/conda/lib/python3.7/site-packages/onnx/external_data_helper.py in load_external_data_for_tensor(tensor, base_dir)
     48     external_data_file_path = os.path.join(base_dir, file_location)
     49 
---> 50     with open(external_data_file_path, 'rb') as data_file:
     51 
     52         if info.offset:

FileNotFoundError: [Errno 2] No such file or directory: '/home/jupyter/encoder.embed_tokens.weight'`

Has anyone successfully exported the t5-11b version and knows how to solve this?

Update:

I tried changing the working directory to /home/jupyter/models instead of /home/jupyter/, which seems to solve the FileNotFoundError. But then again I get problems with the size:

ValueError                                Traceback (most recent call last)
<ipython-input-10-032d95bca1c8> in <module>
      1 os.chdir(r'/home/jupyter/models/')
----> 2 quant_model_paths = quantize(onnx_model_paths)

~/fastT5/fastT5/onnx_exporter.py in quantize(models_name_or_path)
    273             activation_type=QuantType.QUInt8,
    274             weight_type=QuantType.QUInt8,
--> 275             optimize_model=False,
    276         )  # op_types_to_quantize=['MatMul', 'Relu', 'Add', 'Mul' ],
    277         quant_model_paths.append(output_model_name)

/opt/conda/lib/python3.7/site-packages/onnxruntime/quantization/quantize.py in quantize_dynamic(model_input, model_output, op_types_to_quantize, per_channel, reduce_range, activation_type, weight_type, nodes_to_quantize, nodes_to_exclude, optimize_model, use_external_data_format)
    278         nodes_to_quantize,
    279         nodes_to_exclude,
--> 280         op_types_to_quantize)
    281 
    282     quantizer.quantize_model()

/opt/conda/lib/python3.7/site-packages/onnxruntime/quantization/onnx_quantizer.py in __init__(self, model, per_channel, reduce_range, mode, static, weight_qType, input_qType, tensors_range, nodes_to_quantize, nodes_to_exclude, op_types_to_quantize)
     30 
     31         # run shape inference on the model
---> 32         model = onnx.shape_inference.infer_shapes(model)
     33         self.value_infos = {vi.name: vi for vi in model.graph.value_info}
     34         self.value_infos.update({ot.name: ot for ot in model.graph.output})

/opt/conda/lib/python3.7/site-packages/onnx/shape_inference.py in infer_shapes(model, check_type, strict_mode)
     34 def infer_shapes(model, check_type=False, strict_mode=False):  # type: (ModelProto, bool, bool) -> ModelProto
     35     if isinstance(model, ModelProto):
---> 36         model_str = model.SerializeToString()
     37         inferred_model_str = C.infer_shapes(model_str, check_type, strict_mode)
     38         return onnx.load_from_string(inferred_model_str)

ValueError: Message onnx.ModelProto exceeds maximum protobuf size of 2GB: 19459248612

[ViktorThink]

Normal torch quantization works on the larger models, so to anyone reading could check that out as an alternative: https://snappishproductions.com/blog/2020/05/03/big-models-hate-this-one-weird-trick-quantization-t5--pytorch-1.4.html.html

My result was 4x smaller (with qint8) and 3x faster, so better than nothing, although I lost a little bit of accuracy.

[samanz]

I’m getting this same error when trying to export t5-3b. Seems like this may be the more relevant onnx issue. Seems like the infer_shapes method doesn’t work with large models, and is supposed to be replaced with infer_shapes_path. So that would need to be fixed in the onnxruntime project. I modified the code in onnx_quantizer to look like:

        onnx.shape_inference.infer_shapes_path(model_name, model_name + ".inferred")
        model = onnx.load(model_name + ".inferred")

while passing in a model_name to the method as well. The code was able to get pass the shape inference step, but failed with this information now:

Quantizing... |##########                      | 1/3
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-4-e72945460842> in <module>
      1 # Step 2. (recommended) quantize the converted model for fast inference and to reduce model size.
----> 2 quant_model_paths = quantize(onnx_model_paths)
      3 
      4 # step 3. setup onnx runtime
      5 model_sessions = get_onnx_runtime_sessions(quant_model_paths)

~/.local/lib/python3.6/site-packages/fastT5/onnx_exporter.py in quantize(models_name_or_path)
    274             weight_type=QuantType.QUInt8,
    275             optimize_model=False,
--> 276             use_external_data_format=True,
    277         )  # op_types_to_quantize=['MatMul', 'Relu', 'Add', 'Mul' ],
    278         quant_model_paths.append(output_model_name)

~/.local/lib/python3.6/site-packages/onnxruntime/quantization/quantize.py in quantize_dynamic(model_input, model_output, op_types_to_quantize, per_channel, reduce_range, activation_type, weight_type, nodes_to_quantize, nodes_to_exclude, optimize_model, use_external_data_format)
    281         op_types_to_quantize)
    282 
--> 283     quantizer.quantize_model()
    284     quantizer.model.save_model_to_file(model_output, use_external_data_format)
    285 

~/.local/lib/python3.6/site-packages/onnxruntime/quantization/onnx_quantizer.py in quantize_model(self)
    195                 op_quantizer = CreateDefaultOpQuantizer(self, node)
    196 
--> 197             op_quantizer.quantize()
    198 
    199         self._dequantize_outputs()

~/.local/lib/python3.6/site-packages/onnxruntime/quantization/operators/matmul.py in quantize(self)
     17 
     18         (quantized_input_names, zero_point_names, scale_names, nodes) = \
---> 19             self.quantizer.quantize_inputs(node, [0, 1])
     20 
     21         matmul_integer_output = node.output[0] + "_output_quantized"

~/.local/lib/python3.6/site-packages/onnxruntime/quantization/onnx_quantizer.py in quantize_inputs(self, node, indices, initializer_use_weight_qType)
    613             if initializer is not None:
    614                 q_weight_name, zp_name, scale_name = self.quantize_weight(
--> 615                     initializer, self.weight_qType if initializer_use_weight_qType else self.input_qType)
    616 
    617                 quantized_input_names.append(q_weight_name)

~/.local/lib/python3.6/site-packages/onnxruntime/quantization/onnx_quantizer.py in quantize_weight(self, weight, qType)
    654 
    655         # Update packed weight, zero point, and scale initializers
--> 656         weight_data = self.tensor_proto_to_array(weight)
    657         _, _, zero_point, scale, q_weight_data = quantize_data(weight_data.flatten().tolist(),
    658                                                                get_qrange_for_qType(qType, self.reduce_range), qType)

~/.local/lib/python3.6/site-packages/onnxruntime/quantization/onnx_quantizer.py in tensor_proto_to_array(initializer)
    215     def tensor_proto_to_array(initializer):
    216         if initializer.data_type == onnx_proto.TensorProto.FLOAT:
--> 217             weights = onnx.numpy_helper.to_array(initializer)
    218         else:
    219             raise ValueError('Only float type quantization is supported. Weights {} is {}. '.format(

~/.local/lib/python3.6/site-packages/onnx/numpy_helper.py in to_array(tensor)
     52         return np.frombuffer(
     53             tensor.raw_data,
---> 54             dtype=np_dtype).reshape(dims)
     55     else:
     56         data = getattr(tensor, storage_field),  # type: Sequence[np.complex64]

ValueError: cannot reshape array of size 16777216 into shape (1024,4096)