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前往新版Gitcode,体验更适合开发者的 AI 搜索 >>
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d68786eb
编写于
7月 02, 2020
作者:
W
wukesong
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modify alexnet
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2 changed file
with
51 addition
and
3 deletion
+51
-3
chapter04/alexnet/generator_lr.py
chapter04/alexnet/generator_lr.py
+44
-0
chapter04/alexnet/main.py
chapter04/alexnet/main.py
+7
-3
未找到文件。
chapter04/alexnet/generator_lr.py
0 → 100755
浏览文件 @
d68786eb
# Copyright 2020 Huawei Technologies Co., Ltd
#
# 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.
# ============================================================================
"""learning rate generator"""
import
numpy
as
np
def
get_lr
(
current_step
,
lr_max
,
total_epochs
,
steps_per_epoch
):
"""
generate learning rate array
Args:
current_step(int): current steps of the training
lr_max(float): max learning rate
total_epochs(int): total epoch of training
steps_per_epoch(int): steps of one epoch
Returns:
np.array, learning rate array
"""
lr_each_step
=
[]
total_steps
=
steps_per_epoch
*
total_epochs
decay_epoch_index
=
[
0.8
*
total_steps
]
for
i
in
range
(
total_steps
):
if
i
<
decay_epoch_index
[
0
]:
lr
=
lr_max
else
:
lr
=
lr_max
*
0.1
lr_each_step
.
append
(
lr
)
lr_each_step
=
np
.
array
(
lr_each_step
).
astype
(
np
.
float32
)
learning_rate
=
lr_each_step
[
current_step
:]
return
learning_rate
chapter04/alexnet/main.py
浏览文件 @
d68786eb
...
@@ -17,14 +17,16 @@ AlexNet example tutorial
...
@@ -17,14 +17,16 @@ AlexNet example tutorial
Usage:
Usage:
python alexnet.py
python alexnet.py
with --device_target=GPU: After 20 epoch training, the accuracy is up to 80%
with --device_target=GPU: After 20 epoch training, the accuracy is up to 80%
with --device_target=Ascend: After
10 epoch training, the accuracy is up to 81
%
with --device_target=Ascend: After
30 epoch training, the accuracy is up to 88
%
"""
"""
import
argparse
import
argparse
from
config
import
alexnet_cfg
as
cfg
from
config
import
alexnet_cfg
as
cfg
from
alexnet
import
AlexNet
from
alexnet
import
AlexNet
from
generator_lr
import
get_lr
import
mindspore.dataset
as
ds
import
mindspore.dataset
as
ds
import
mindspore.nn
as
nn
import
mindspore.nn
as
nn
from
mindspore
import
Tensor
from
mindspore
import
context
from
mindspore
import
context
from
mindspore.train.serialization
import
load_checkpoint
,
load_param_into_net
from
mindspore.train.serialization
import
load_checkpoint
,
load_param_into_net
from
mindspore.train.callback
import
ModelCheckpoint
,
CheckpointConfig
,
LossMonitor
from
mindspore.train.callback
import
ModelCheckpoint
,
CheckpointConfig
,
LossMonitor
...
@@ -75,7 +77,7 @@ if __name__ == "__main__":
...
@@ -75,7 +77,7 @@ if __name__ == "__main__":
parser
.
add_argument
(
'--data_path'
,
type
=
str
,
default
=
"./"
,
help
=
'path where the dataset is saved'
)
parser
.
add_argument
(
'--data_path'
,
type
=
str
,
default
=
"./"
,
help
=
'path where the dataset is saved'
)
parser
.
add_argument
(
'--ckpt_path'
,
type
=
str
,
default
=
"./ckpt"
,
help
=
'if mode is test, must provide
\
parser
.
add_argument
(
'--ckpt_path'
,
type
=
str
,
default
=
"./ckpt"
,
help
=
'if mode is test, must provide
\
path where the trained ckpt file'
)
path where the trained ckpt file'
)
parser
.
add_argument
(
'--dataset_sink_mode'
,
type
=
bool
,
default
=
Fals
e
,
help
=
'dataset_sink_mode is False or True'
)
parser
.
add_argument
(
'--dataset_sink_mode'
,
type
=
bool
,
default
=
Tru
e
,
help
=
'dataset_sink_mode is False or True'
)
args
=
parser
.
parse_args
()
args
=
parser
.
parse_args
()
context
.
set_context
(
mode
=
context
.
GRAPH_MODE
,
device_target
=
args
.
device_target
)
context
.
set_context
(
mode
=
context
.
GRAPH_MODE
,
device_target
=
args
.
device_target
)
...
@@ -83,7 +85,9 @@ if __name__ == "__main__":
...
@@ -83,7 +85,9 @@ if __name__ == "__main__":
network
=
AlexNet
(
cfg
.
num_classes
)
network
=
AlexNet
(
cfg
.
num_classes
)
loss
=
nn
.
SoftmaxCrossEntropyWithLogits
(
is_grad
=
False
,
sparse
=
True
,
reduction
=
"mean"
)
loss
=
nn
.
SoftmaxCrossEntropyWithLogits
(
is_grad
=
False
,
sparse
=
True
,
reduction
=
"mean"
)
repeat_size
=
cfg
.
epoch_size
repeat_size
=
cfg
.
epoch_size
opt
=
nn
.
Momentum
(
network
.
trainable_params
(),
cfg
.
learning_rate
,
cfg
.
momentum
)
# when batch_size=32, steps is 1562
lr
=
Tensor
(
get_lr
(
0
,
cfg
.
learning_rate
,
cfg
.
epoch_size
,
1562
))
opt
=
nn
.
Momentum
(
network
.
trainable_params
(),
lr
,
cfg
.
momentum
)
model
=
Model
(
network
,
loss
,
opt
,
metrics
=
{
"Accuracy"
:
Accuracy
()})
# test
model
=
Model
(
network
,
loss
,
opt
,
metrics
=
{
"Accuracy"
:
Accuracy
()})
# test
if
args
.
mode
==
'train'
:
if
args
.
mode
==
'train'
:
...
...
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