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Merge pull request #1167 from GY-GitCode/24-5-4-commit
Add implementations for the new loss function
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# | ||
# Licensed to the Apache Software Foundation (ASF) under one | ||
# or more contributor license agreements. See the NOTICE file | ||
# distributed with this work for additional information | ||
# regarding copyright ownership. The ASF licenses this file | ||
# to you 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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from singa import layer | ||
from singa import model | ||
from singa import tensor | ||
from singa import opt | ||
from singa import device | ||
from singa.autograd import Operator | ||
from singa.layer import Layer | ||
from singa import singa_wrap as singa | ||
import argparse | ||
import numpy as np | ||
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np_dtype = {"float16": np.float16, "float32": np.float32} | ||
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singa_dtype = {"float16": tensor.float16, "float32": tensor.float32} | ||
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#### self-defined loss begin | ||
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### from autograd.py | ||
class SumError(Operator): | ||
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def __init__(self): | ||
super(SumError, self).__init__() | ||
# self.t = t.data | ||
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def forward(self, x): | ||
# self.err = singa.__sub__(x, self.t) | ||
self.data_x = x | ||
# sqr = singa.Square(self.err) | ||
# loss = singa.SumAll(sqr) | ||
loss = singa.SumAll(x) | ||
# self.n = 1 | ||
# for s in x.shape(): | ||
# self.n *= s | ||
# loss /= self.n | ||
return loss | ||
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def backward(self, dy=1.0): | ||
# dx = self.err | ||
dev = device.get_default_device() | ||
dx = tensor.Tensor(self.data_x.shape, dev, singa_dtype['float32']) | ||
dx.copy_from_numpy(np.ones(self.data_x.shape)) | ||
# dx *= float(2 / self.n) | ||
dx *= dy | ||
return dx | ||
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def se_loss(x): | ||
# assert x.shape == t.shape, "input and target shape different: %s, %s" % ( | ||
# x.shape, t.shape) | ||
return SumError()(x)[0] | ||
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### from layer.py | ||
class SumErrorLayer(Layer): | ||
""" | ||
Generate a MeanSquareError operator | ||
""" | ||
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def __init__(self): | ||
super(SumErrorLayer, self).__init__() | ||
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def forward(self, x): | ||
return se_loss(x) | ||
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#### self-defined loss end | ||
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class MSMLP(model.Model): | ||
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def __init__(self, data_size=10, perceptron_size=100, num_classes=10): | ||
super(MSMLP, self).__init__() | ||
self.num_classes = num_classes | ||
self.dimension = 2 | ||
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self.relu = layer.ReLU() | ||
self.linear1 = layer.Linear(perceptron_size) | ||
self.linear2 = layer.Linear(num_classes) | ||
self.softmax_cross_entropy = layer.SoftMaxCrossEntropy() | ||
self.sum_error = SumErrorLayer() | ||
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def forward(self, inputs): | ||
y = self.linear1(inputs) | ||
y = self.relu(y) | ||
y = self.linear2(y) | ||
return y | ||
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def train_one_batch(self, x, y, dist_option, spars, synflow_flag): | ||
# print ("in train_one_batch") | ||
out = self.forward(x) | ||
# print ("train_one_batch x.data: \n", x.data) | ||
# print ("train_one_batch y.data: \n", y.data) | ||
# print ("train_one_batch out.data: \n", out.data) | ||
if synflow_flag: | ||
# print ("sum_error") | ||
loss = self.sum_error(out) | ||
else: # normal training | ||
# print ("softmax_cross_entropy") | ||
loss = self.softmax_cross_entropy(out, y) | ||
# print ("train_one_batch loss.data: \n", loss.data) | ||
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if dist_option == 'plain': | ||
# print ("before pn_p_g_list = self.optimizer(loss)") | ||
pn_p_g_list = self.optimizer(loss) | ||
# print ("after pn_p_g_list = self.optimizer(loss)") | ||
elif dist_option == 'half': | ||
self.optimizer.backward_and_update_half(loss) | ||
elif dist_option == 'partialUpdate': | ||
self.optimizer.backward_and_partial_update(loss) | ||
elif dist_option == 'sparseTopK': | ||
self.optimizer.backward_and_sparse_update(loss, | ||
topK=True, | ||
spars=spars) | ||
elif dist_option == 'sparseThreshold': | ||
self.optimizer.backward_and_sparse_update(loss, | ||
topK=False, | ||
spars=spars) | ||
# print ("len(pn_p_g_list): \n", len(pn_p_g_list)) | ||
# print ("len(pn_p_g_list[0]): \n", len(pn_p_g_list[0])) | ||
# print ("pn_p_g_list[0][0]: \n", pn_p_g_list[0][0]) | ||
# print ("pn_p_g_list[0][1].data: \n", pn_p_g_list[0][1].data) | ||
# print ("pn_p_g_list[0][2].data: \n", pn_p_g_list[0][2].data) | ||
return pn_p_g_list, out, loss | ||
# return pn_p_g_list[0], pn_p_g_list[1], pn_p_g_list[2], out, loss | ||
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def set_optimizer(self, optimizer): | ||
self.optimizer = optimizer | ||
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def create_model(pretrained=False, **kwargs): | ||
"""Constructs a CNN model. | ||
Args: | ||
pretrained (bool): If True, returns a pre-trained model. | ||
Returns: | ||
The created CNN model. | ||
""" | ||
model = MSMLP(**kwargs) | ||
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return model | ||
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__all__ = ['MLP', 'create_model'] | ||
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if __name__ == "__main__": | ||
np.random.seed(0) | ||
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parser = argparse.ArgumentParser() | ||
parser.add_argument('-p', | ||
choices=['float32', 'float16'], | ||
default='float32', | ||
dest='precision') | ||
parser.add_argument('-g', | ||
'--disable-graph', | ||
default='True', | ||
action='store_false', | ||
help='disable graph', | ||
dest='graph') | ||
parser.add_argument('-m', | ||
'--max-epoch', | ||
default=1001, | ||
type=int, | ||
help='maximum epochs', | ||
dest='max_epoch') | ||
args = parser.parse_args() | ||
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# generate the boundary | ||
f = lambda x: (5 * x + 1) | ||
bd_x = np.linspace(-1.0, 1, 200) | ||
bd_y = f(bd_x) | ||
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# generate the training data | ||
x = np.random.uniform(-1, 1, 400) | ||
y = f(x) + 2 * np.random.randn(len(x)) | ||
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# choose one precision | ||
precision = singa_dtype[args.precision] | ||
np_precision = np_dtype[args.precision] | ||
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# convert training data to 2d space | ||
label = np.asarray([5 * a + 1 > b for (a, b) in zip(x, y)]).astype(np.int32) | ||
data = np.array([[a, b] for (a, b) in zip(x, y)], dtype=np_precision) | ||
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dev = device.create_cuda_gpu_on(0) | ||
sgd = opt.SGD(0.1, 0.9, 1e-5, dtype=singa_dtype[args.precision]) | ||
tx = tensor.Tensor((400, 2), dev, precision) | ||
ty = tensor.Tensor((400,), dev, tensor.int32) | ||
model = MLP(data_size=2, perceptron_size=3, num_classes=2) | ||
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# attach model to graph | ||
model.set_optimizer(sgd) | ||
model.compile([tx], is_train=True, use_graph=args.graph, sequential=True) | ||
model.train() | ||
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for i in range(args.max_epoch): | ||
tx.copy_from_numpy(data) | ||
ty.copy_from_numpy(label) | ||
out, loss = model(tx, ty, 'fp32', spars=None) | ||
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if i % 100 == 0: | ||
print("training loss = ", tensor.to_numpy(loss)[0]) |