提交 1f5f79cb 编写于 作者: F fengjiayi

fix error_clip errors and add unit test

上级 5f985000
......@@ -3,7 +3,8 @@ import layers
from . import core
__all__ = [
'GradientClipByValue', 'append_gradient_clip_ops', 'error_clip_callback'
'GradientClipByValue', 'ErrorClipByValue', 'append_gradient_clip_ops',
'error_clip_callback'
]
......@@ -23,12 +24,12 @@ class ErrorClipByValue(BaseErrorClipAttr):
self.min = min
def append_clip_op(self, block, grad_name):
block.append_op(
type="clip",
inputs={"X": grad_name},
outputs={"Out": grad_name},
attrs={"min": self.min,
"max": self.max})
clip_op_desc = block.desc.append_op()
clip_op_desc.set_type("clip")
clip_op_desc.set_input("X", [grad_name])
clip_op_desc.set_output("Out", [grad_name])
clip_op_desc.set_attr("min", self.min)
clip_op_desc.set_attr("max", self.max)
def error_clip_callback(block, context):
......
......@@ -271,6 +271,9 @@ class Variable(object):
uid = core.unique_integer(prefix) # unique during whole process.
return "_".join([prefix, str(uid)])
def set_error_clip(self, error_clip):
self.error_clip = error_clip
def get_all_op_protos():
"""
......
from __future__ import print_function
import numpy as np
import paddle.v2 as paddle
import paddle.v2.fluid as fluid
BATCH_SIZE = 128
CLIP_MAX = 2e-6
CLIP_MIN = -1e-6
prog = fluid.framework.Program()
with fluid.program_guard(main_program=prog):
image = fluid.layers.data(name='x', shape=[784], dtype='float32')
hidden1 = fluid.layers.fc(input=image, size=128, act='relu')
hidden2 = fluid.layers.fc(input=hidden1, size=64, act='relu')
predict = fluid.layers.fc(input=hidden2, size=10, act='softmax')
label = fluid.layers.data(name='y', shape=[1], dtype='int64')
cost = fluid.layers.cross_entropy(input=predict, label=label)
avg_cost = fluid.layers.mean(x=cost)
prog_clip = prog.clone()
prog_clip.block(0).var(hidden1.name).set_error_clip(
fluid.clip.ErrorClipByValue(
max=CLIP_MAX, min=CLIP_MIN))
avg_cost_clip = prog_clip.block(0).var(avg_cost.name)
fluid.backward.append_backward(loss=avg_cost)
fluid.backward.append_backward(
loss=avg_cost_clip, callback=fluid.clip.error_clip_callback)
hidden1_grad = prog.block(0).var(hidden1.name + "@GRAD")
hidden1_grad_clip = prog_clip.block(0).var(hidden1.name + "@GRAD")
train_reader = paddle.batch(
paddle.reader.shuffle(
paddle.dataset.mnist.train(), buf_size=8192),
batch_size=BATCH_SIZE)
place = fluid.CPUPlace()
exe = fluid.Executor(place)
feeder = fluid.DataFeeder(feed_list=[image, label], place=place)
exe.run(fluid.default_startup_program())
count = 0
for data in train_reader():
count += 1
if count > 5:
break
out = exe.run(prog, feed=feeder.feed(data), fetch_list=[hidden1_grad])
out_clip = exe.run(prog_clip,
feed=feeder.feed(data),
fetch_list=[hidden1_grad_clip])
if not (out[0].clip(min=CLIP_MIN, max=CLIP_MAX) == out_clip[0]).all():
exit(1)
exit(0)
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