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体验新版 GitCode,发现更多精彩内容 >>
提交
1a5f31b5
编写于
3月 01, 2019
作者:
S
sneaxiy
提交者:
ceci3
3月 04, 2019
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Fix doc
test=develop
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python/paddle/fluid/executor.py
python/paddle/fluid/executor.py
+34
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python/paddle/fluid/executor.py
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1a5f31b5
...
...
@@ -261,45 +261,42 @@ def _as_lodtensor(data, place):
class
Executor
(
object
):
"""
An Executor in Python, only support the single-GPU running. For multi-cards, please refer to
ParallelExecutor.
Python executor takes a program, add feed operators and fetch operators to this program according
An Executor in Python, supports single/multiple-GPU running, and single/multiple-CPU running.
Python executor takes a program, adds feed operators and fetch operators to this program according
to feed map and fetch_list. Feed map provides input data for the program. fetch_list provides
the variables(or names) that user want
to get after program run
. Note: the executor will run all
the variables(or names) that user want
s to get after program runs
. Note: the executor will run all
operators in the program but not only the operators dependent by the fetch_list.
It store the global variables into the global scope, and create a local scope for the temporary
variables. The local scope contents will be discarded after every minibatch forward/backward finished.
But the global scope variables will be persistent through different runs.
All of ops in program will be running in sequence.
It stores the global variables into the global scope, and creates a local scope for the temporary
variables. The contents in local scope may be discarded after every minibatch forward/backward
finished. But the global scope variables will be persistent through different runs.
Example:
.. code-block:: python
# First create the Executor.
place = fluid.CUDAPlace(0) if use_cuda else fluid.CPUPlace()
exe = fluid.Executor(place)
# Run the startup program once and only once.
# Not need to optimize/compile the startup program.
exe.run(fluid.default_startup_program())
# Run the main program directly without compile.
loss, = exe.run(fluid.default_main_program(),
feed=feed_dict,
fetch_list=[loss.name])
# Or, compiled the program and run. See `CompiledProgram` for more detail.
compiled_prog = compiler.CompiledProgram(
fluid.default_main_program()).with_data_parallel(
loss_name=loss.name)
loss, = exe.run(compiled_prog,
feed=feed_dict,
fetch_list=[loss.name])
.. code-block:: python
# First create the Executor.
place = fluid.CUDAPlace(0) if use_cuda else fluid.CPUPlace()
exe = fluid.Executor(place)
# Run the startup program once and only once.
# Not need to optimize/compile the startup program.
exe.run(fluid.default_startup_program())
# Run the main program directly without compile.
loss, = exe.run(fluid.default_main_program(),
feed=feed_dict,
fetch_list=[loss.name])
# Or, compiled the program and run. See `CompiledProgram` for more detail.
compiled_prog = compiler.CompiledProgram(
fluid.default_main_program()).with_data_parallel(
loss_name=loss.name)
loss, = exe.run(compiled_prog,
feed=feed_dict,
fetch_list=[loss.name])
Args:
place(core.CPUPlace|core.CUDAPlace(n)): indicate the executor run on which device
Note: For debugging complicated network in parallel-GPUs, you can test it on the executor.
They has the exactly same arguments, and expected the same results.
"""
def
__init__
(
self
,
place
):
...
...
@@ -382,6 +379,12 @@ class Executor(object):
]
return
outs
'''
TODO(typhoonzero): Define "no longer use" meaning? Can user create
a new Executor for the same program and run?
TODO(panyx0718): Why ParallelExecutor doesn't have close?
'''
def
close
(
self
):
"""
Close this executor.
...
...
@@ -389,9 +392,6 @@ class Executor(object):
You can no longer use this executor after calling this method.
For the distributed training, this method would free the resource on PServers related to
the current Trainer.
TODO(typhoonzero): Define "no longer use" meaning? Can user create
a new Executor for the same program and run?
TODO(panyx0718): Why ParallelExecutor doesn't have close?
Example:
>>> cpu = core.CPUPlace()
...
...
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