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[NPU] Add flatten_param_grads for Trainer to improve NPU performance (#…
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# Copyright 2020-present the HuggingFace Inc. team. | ||
# Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved. | ||
# | ||
# Licensed under the Apache License, Version 2.0 (the "License"); | ||
# you may not use this file except in compliance with the License. | ||
# You may obtain a copy of the License at | ||
# | ||
# http://www.apache.org/licenses/LICENSE-2.0 | ||
# | ||
# Unless required by applicable law or agreed to in writing, software | ||
# distributed under the License is distributed on an "AS IS" BASIS, | ||
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
# See the License for the specific language governing permissions and | ||
# limitations under the License. | ||
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import types | ||
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import numpy as np | ||
import paddle | ||
from paddle.fluid.layer_helper import LayerHelper | ||
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from ...utils.log import logger | ||
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def npu_accelerate_plugin(optimizer): | ||
"""npu_accelerate_plugin uses the flatten_param_grads method to speed up the performance of the model on NPU devices. | ||
flatten_param_grads method will be added to `step` function of optimizer. | ||
Args: | ||
optimizer (`paddle.optimizer.Optimizer`): | ||
The Optimizer whose `step` method will be modified. | ||
""" | ||
optimizer.step = types.MethodType(_optimizer_step_with_flatten_param_grads, optimizer) | ||
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def _optimizer_step_with_flatten_param_grads(optimizer): | ||
if not isinstance(optimizer._param_groups[0], dict): | ||
params_grads = [] | ||
for param in optimizer._param_groups: | ||
if param.stop_gradient: | ||
continue | ||
if param._grad_ivar() is not None: | ||
grad_var = param._grad_ivar() | ||
params_grads.append((param, grad_var)) | ||
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# currently, only support ClipGradByGlobalNorm and without regularization. | ||
if isinstance(params_grads, list) and optimizer.regularization is None: | ||
if optimizer._grad_clip is None or isinstance(optimizer._grad_clip, paddle.nn.ClipGradByGlobalNorm): | ||
params_grads = _flatten_param_grads(optimizer, params_grads) | ||
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optimizer._apply_optimize( | ||
loss=None, | ||
startup_program=None, | ||
params_grads=params_grads, | ||
param_group_idx=0, | ||
) | ||
else: | ||
raise RuntimeError("flatten_param_grads is not supported when _param_groups[0] is dict.") | ||
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def _flatten_param_grads(optimizer, params_grads): | ||
optimizer.helper = LayerHelper(optimizer.__class__.__name__) | ||
need_flatten_params = [] | ||
need_flatten_grads = [] | ||
for p, g in params_grads: | ||
if g is None: | ||
continue | ||
g.persistable = True | ||
if getattr(p, "need_clip", True) is False or getattr(p, "regularizer", None) is not None: | ||
logger.warning( | ||
f"flatten_param_grads=True will be discarded since paramter {p.name}'s need_clip is False or " | ||
"the regularizer is set." | ||
) | ||
return params_grads | ||
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need_flatten_params.append(p) | ||
need_flatten_grads.append(g) | ||
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shape = [np.prod(p.shape) for p in need_flatten_params] | ||
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flatten_param = optimizer.helper.create_global_variable( | ||
name="flatten_param", | ||
persistable=True, | ||
dtype=need_flatten_params[0].dtype, | ||
shape=[np.sum(shape)], | ||
belong_to_optimizer=True, | ||
) | ||
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flatten_grad = optimizer.helper.create_global_variable( | ||
name="flatten_grad", | ||
persistable=True, | ||
dtype=need_flatten_grads[0].dtype, | ||
shape=[np.sum(shape)], | ||
belong_to_optimizer=True, | ||
) | ||
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flatten_param.stop_gradient = False | ||
# In the final state of the dynamic graph, the `coalesce_tensor` op | ||
# does not support passing the output as an input into the op in | ||
# temporary, so _legacy_C_ops is temporarily used here. | ||
# `use_align` is set to false, which is different from the behavior | ||
# under static graphs. `use_align` can be set to true after calling | ||
# the coalesce_tensor op of the final state (_C_ops). | ||
paddle._legacy_C_ops.coalesce_tensor( | ||
need_flatten_params, | ||
need_flatten_params, | ||
flatten_param, | ||
"copy_data", | ||
True, | ||
"use_align", | ||
False, | ||
"dtype", | ||
need_flatten_params[0].dtype, | ||
) | ||
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paddle._legacy_C_ops.coalesce_tensor( | ||
need_flatten_grads, | ||
need_flatten_grads, | ||
flatten_grad, | ||
"copy_data", | ||
True, | ||
"use_align", | ||
False, | ||
"dtype", | ||
need_flatten_grads[0].dtype, | ||
) | ||
return [(flatten_param, flatten_grad)] |
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