# Copyright 2022 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.
# ============================================================================
"""Data sink help for minddata dataset"""
from functools import wraps
import mindspore.ops as ops
from mindspore import context
from mindspore.common.dtype import pytype_to_dtype
from mindspore.common.api import jit
from mindspore.train._utils import _exec_datagraph, _get_types_and_shapes
from mindspore.train.dataset_helper import _has_dynamic_shape, _check_inputs
import mindspore.dataset as ds
from mindspore._c_expression import _set_dataset_mode_config
from mindspore.parallel._utils import _get_device_num, _need_to_full, _to_full_shapes, _get_pipeline_stages
from mindspore import _checkparam as Validator
def _init_sink_dataset(dataset, sink_size, input_signature, create_info):
"""
Initialize data sinking
"""
if hasattr(dataset, '__transfer_dataset__'):
raise ValueError(f"The dataset has been used with network.")
dataset_size = dataset.get_dataset_size()
dataset_types, dataset_shapes = _get_types_and_shapes(dataset)
dynamic_shape = _has_dynamic_shape(dataset_shapes) or ds.config.get_dynamic_shape()
# create transfer_dataset
is_info_queue = (create_info and sink_size == 1 and dataset_size != 1 and
input_signature is None and not dynamic_shape and
context.get_context('device_target') == 'Ascend')
transfer_dataset = _exec_datagraph(dataset, sink_size, create_data_info_queue=is_info_queue)
dataset.__transfer_dataset__ = transfer_dataset
# send data
transfer_dataset.send(-1)
# create GetNext op
if input_signature is not None:
_check_inputs(input_signature, dataset_shapes, dataset_types)
queue_name = transfer_dataset.queue_name
if _need_to_full() and context.get_context('mode') == context.GRAPH_MODE:
device_num = _get_device_num() // _get_pipeline_stages()
dataset_shapes = _to_full_shapes(dataset_shapes, device_num)
next_op = ops.GetNext(dataset_types, dataset_shapes, len(dataset_types), queue_name)
_set_dataset_mode_config('sink')
dataset.__transfer_dataset__ = transfer_dataset
return next_op, is_info_queue
class _DataSinkAux:
@staticmethod
def __deepcopy__(memodict):
return
def _get_next_op(dataset, ori_next_op, is_info_queue):
"""
get the next operation.
"""
if not is_info_queue:
return ori_next_op, ''
if not hasattr(dataset, '__sink_aux__'):
dataset.__sink_aux__ = _DataSinkAux()
dataset.__sink_aux__.next_ops = {}
dataset.__sink_aux__.sink_funcs = {}
queue_name = dataset.__transfer_dataset__.queue_name
dataset_types, dataset_shapes = dataset.__transfer_dataset__.get_data_info()
dataset_types = [pytype_to_dtype(x) for x in dataset_types]
key = str(dataset_types) + str(dataset_shapes)
if key in dataset.__sink_aux__.next_ops:
next_op = dataset.__sink_aux__.next_ops[key]
else:
if _need_to_full() and context.get_context('mode') == context.GRAPH_MODE:
device_num = _get_device_num() // _get_pipeline_stages()
dataset_shapes = _to_full_shapes(dataset_shapes, device_num)
next_op = ops.GetNext(dataset_types, dataset_shapes, len(dataset_types), queue_name)
return next_op, (key, dataset_shapes, dataset_types)
def _get_sink_fun(sink_fun, key_info, is_info_queue, dataset, jit_config):
"""
get the sink function.
"""
if not is_info_queue:
if not hasattr(dataset, '__sink_fun__'):
if jit_config is None:
dst_sink_fun = sink_fun
else:
dst_sink_fun = jit(sink_fun, jit_config=jit_config)
dataset.__sink_fun__ = dst_sink_fun
return dataset.__sink_fun__
key = key_info[0]
if key in dataset.__sink_aux__.sink_funcs:
dst_sink_fun = dataset.__sink_aux__.sink_funcs[key]
else:
if jit_config is None:
dst_sink_fun = sink_fun
else:
dst_sink_fun = jit(sink_fun, jit_config=jit_config)
dataset.__sink_aux__.sink_funcs[key] = dst_sink_fun
return dst_sink_fun
[文档]def data_sink(fn, dataset, sink_size=1, jit_config=None, input_signature=None):
"""
A wrapper function to generate a function for the input function.
Note:
When using data sinking, the dataset will be automatically looped to the device. The device side can cache up
to 100 batches of data and occupy no more than 2GB of memory. At this time, only the number of steps for each
sinking `sink_size` needs to be considered. `sink_size` defaults to ``1``, indicating that each epoch only
takes one batch of data from the cache for training and outputs a loss. If `sink_size` is greater than 1, each
epoch takes out `sink_size` batches of data from the cache for training and outputs a loss.
Args:
fn (Function): The Python function that will be run with dataset.
dataset (Dataset): The dataset iterator. The dataset can be generated by dataset generator API in
:class:`mindspore.dataset`, such as :class:`mindspore.dataset.ImageFolderDataset`.
sink_size (int): Control the amount of data in each sink. `sink_size` must be positive integer. Default: ``1`` .
jit_config (JitConfig): Controls the execution mode(Graph mode/PyNative mode) of the generated function, and Jit
config for compile. Default: ``None`` , means running in PyNative mode.
input_signature (Union[Tensor, List or Tuple of Tensors]): The Tensor which describes the input arguments.
The shape and dtype of the Tensor will be supplied to this function. If input_signature is specified,
each input to `fn` must be a `Tensor`. And the input parameters of `fn` cannot accept `**kwargs`. The shape
and dtype of actual inputs should keep the same as `input_signature`. Otherwise, TypeError will be raised.
Default: ``None`` .
Returns:
Function, the generated function will be executed in data sinking mode.
Raises:
ValueError: If `sink_size` is not positive integer.
Supported Platforms:
``Ascend`` ``GPU``
Examples:
>>> import numpy as np
>>> import mindspore as ms
>>> from mindspore import dataset as ds
>>>
>>> data = {"x": np.ones((1,), dtype=np.int32), "y": np.ones((1,), dtype=np.int32)}
>>> dataset = ds.NumpySlicesDataset(data=data)
>>>
>>> def func_net(x, y):
... out = x + y
... return out
>>>
>>> sink_process = ms.data_sink(func_net, dataset, sink_size=1)
>>> for _ in range(2):
... out = sink_process()
... print(out)
2
2
"""
Validator.check_value_type("sink_size", sink_size, int, "Data sink")
if sink_size <= 0:
raise ValueError(
f"The 'sink_size' must be positive, but got sink_size {sink_size}.")
if context.get_context('device_target') not in ('Ascend', 'GPU'):
raise ValueError(
f"Data sinking supports ascend or gpu device target, "
f"but device target is {context.get_context('device_target')}.")
loop = sink_size
create_info = True
if jit_config is None:
create_info = (loop == 1)
loop = 1
ori_next_op, is_info_queue = _init_sink_dataset(dataset, loop, input_signature, create_info)
@wraps(fn)
def sink_process(*args, **kwargs):
next_op, key_info = _get_next_op(dataset, ori_next_op, is_info_queue)
def sink_fun():
data = next_op()
out = fn(*data)
return out
real_sink_fun = _get_sink_fun(sink_fun, key_info, is_info_queue, dataset, jit_config)
loop = sink_size
if jit_config is not None and context.get_context('mode') == context.GRAPH_MODE:
loop = 1
out = None
for _ in range(loop):
out = real_sink_fun()
return out
return sink_process