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communicator.py
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88 lines (69 loc) · 2.58 KB
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# Copyright (c) 2019 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.
from .executor import global_scope
from . import core
from .framework import Program
__all__ = ['Communicator']
class Communicator(object):
def __init__(self, program):
"""
Communicator is used for async distribute training in distribute_transpiler mode.
It's a wrapper of a cpp class Communicator and should be used inside fleet API.
Args:
program(Program): the trainers program after transpile of distribute_transpiler.
It's used by communicator to extract the information to do communication.
Returns:
None
Examples:
.. code-block:: python
import paddle.fluid as fluid
prog = fluid.Program()
comm = fluid.communicator.Communicator(prog)
comm.start()
comm.stop()
"""
# set all recv op to not_run mode
assert isinstance(program, Program)
for op in program.block(0).ops:
if op.type == "recv":
op._set_attr('do_not_run', True)
self.communicator_ = core.DistCommunicator(program.desc, global_scope())
def start(self):
"""
Start communicator. Should call before training process.
Returns:
None
Examples:
.. code-block:: python
import paddle.fluid as fluid
prog = fluid.Program()
comm = fluid.communicator.Communicator(prog)
comm.start()
comm.stop()
"""
self.communicator_.start()
def stop(self):
"""
Stop communicator. Should call after training process.
Returns:
None
Examples:
.. code-block:: python
import paddle.fluid as fluid
prog = fluid.Program()
comm = fluid.communicator.Communicator(prog)
comm.start()
comm.stop()
"""
self.communicator_.stop()