Source code for mindspore.common.parameter

# Copyright 2020-2021 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
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# See the License for the specific language governing permissions and
# limitations under the License.
# ============================================================================

"""Parameter for cell."""
from copy import copy
import numbers
import numpy as np
from .._c_expression import ParamInfo
from . import dtype as mstype
from .. import context
from ..parallel._utils import _get_parallel_mode
from .initializer import initializer
from .tensor import Tensor
from .._checkparam import Validator
from .._c_expression import Tensor as Tensor_
from ..parallel._tensor import _get_slice_index
from ..parallel._auto_parallel_context import auto_parallel_context
from ..parallel._ps_context import _is_role_worker, _is_role_pserver, _is_role_sched, _clone_hash_table
from ..parallel._ps_context import _reinsert_hash_table_size
from ..parallel._ps_context import _insert_weight_init_info, _insert_accumu_init_info
from .seed import _get_global_and_op_seed

__all__ = ['Parameter', 'ParameterTuple']


def _is_in_parallel_mode():
    """Get parallel mode."""
    return auto_parallel_context().get_parallel_mode() in ["semi_auto_parallel", "auto_parallel"]

def init_to_value(init):
    """Get value of initializer."""
    if isinstance(init, str):
        if init == 'zeros':
            return 0.0
        if init == 'ones':
            return 1.0
        raise ValueError("init should be one of values in 'zeros', 'ones'.")
    if isinstance(init, numbers.Number):
        return float(init)
    raise ValueError("init should be number or string")

[docs]class Parameter(Tensor_): """ Parameter types of cell models. After initialized `Parameter` is a subtype of `Tensor`. In auto_parallel mode of "semi_auto_parallel" and "auto_parallel", if init `Parameter` by an `Tensor`, the type of Parameter will be `Tensor`. `Tensor` will save the shape and type info of a tensor with no memory usage. The shape can be changed while compiling for auto-parallel. Call `init_data` will return a Tensor Parameter with initialized data. Note: Each parameter of Cell is represented by Parameter class. A Parameter has to belong to a Cell. If there is an operator in the network that requires part of the inputs to be Parameter, then the Parameters as this part of the inputs are not allowed to be cast. It is recommended to use the default value of `name` when initialize a parameter as one attribute of a cell, otherwise, the parameter name may be different than expected. Args: default_input (Union[Tensor, int, float, numpy.ndarray, list]): Parameter data, to be set initialized. name (str): Name of the child parameter. Default: None. requires_grad (bool): True if the parameter requires gradient. Default: True. layerwise_parallel (bool): When layerwise_parallel is true in data parallel mode, broadcast and gradients communication would not be applied to parameters. Default: False. parallel_optimizer (bool): It is used to filter the weight shard operation in semi auto or auto parallel mode. It works only when enable parallel optimizer in `mindspore.context.set_auto_parallel_context()`. Default: True. Examples: >>> from mindspore import Parameter, Tensor >>> from mindspore.common import initializer as init >>> from mindspore.ops import operations as P >>> from mindspore.nn import Cell >>> import mindspore >>> import numpy as np >>> from mindspore import context >>> >>> class Net(Cell): ... def __init__(self): ... super(Net, self).__init__() ... self.matmul = P.MatMul() ... self.weight = Parameter(Tensor(np.ones((1, 2)), mindspore.float32), name="w", requires_grad=True) ... ... def construct(self, x): ... out = self.matmul(self.weight, x) ... return out >>> net = Net() >>> x = Tensor(np.ones((2, 1)), mindspore.float32) >>> print(net(x)) [[2.]] >>> _ = net.weight.set_data(Tensor(np.zeros((1, 2)), mindspore.float32)) >>> print(net(x)) [[0.]] """ __base_type__ = {} def __new__(cls, default_input, *args, **kwargs): init_data_flag = bool(isinstance(default_input, Tensor) and default_input.has_init) input_class, *class_init_args = Parameter._get_parameter_new_args(default_input) new_type = Parameter._get_base_class(input_class) obj = input_class.__new__(new_type) input_class.__init__(obj, *class_init_args) # it's better to make the Initializer a kind of tensor. obj.init_mode = None obj.is_default_input_init = init_data_flag if obj.has_init: obj.init_mode = default_input return obj def __reduce_ex__(self, _): data = self if self.init_mode is not None: data = self.init_mode else: # cast to break deep infinite loop while deepcopy data = Tensor(self) return ( Parameter, (data,, self.requires_grad, self.layerwise_parallel)) def __init__(self, default_input, name=None, requires_grad=True, layerwise_parallel=False, parallel_optimizer=True): self.param_info = ParamInfo() self.init_in_server = False self.cache_enable = False = name self.requires_grad = requires_grad self.layerwise_parallel = layerwise_parallel self.parallel_optimizer = parallel_optimizer # this flag for tensor copy data. self.init_flag = False # this flag is for ge variable copy data. self._is_init = False self._inited_param = None self._sliced = False self.is_param_ps = False self._cast_type = None self._unique = False self.is_in_parallel = _is_in_parallel_mode() if isinstance(default_input, (Tensor_, Tensor)): Tensor_.__init__(self, default_input.dtype, default_input.shape) elif isinstance(default_input, int): Tensor_.__init__(self, mstype.int64, ()) elif isinstance(default_input, float): Tensor_.__init__(self, mstype.float32, ()) elif isinstance(default_input, (np.ndarray, list)): Tensor_.__init__(self, default_input) else: raise TypeError(f"Parameter input must be [`Tensor`, `int`, `float`, `numpy.ndarray`, `list`]." f"But with type {type(default_input)}.") def __deepcopy__(self, memodict): new_obj = Parameter(self) = new_obj._inited_param = self._inited_param # pylint: disable=W0212 return new_obj @staticmethod def _get_base_class(input_class): input_class_name = f'Parameter{input_class.__name__}' if input_class_name in Parameter.__base_type__: new_type = Parameter.__base_type__[input_class_name] else: new_type = type(input_class_name, (Parameter, input_class), {}) Parameter.__base_type__[input_class_name] = new_type return new_type @staticmethod def _get_parameter_new_args(data): """Set `set_data` of current `Parameter`.""" if isinstance(data, bool): raise ValueError('Parameter data can not be `bool`') if isinstance(data, Tensor) and data.has_init: if _is_in_parallel_mode() or _is_role_worker() or _is_role_sched(): # do not init data while in auto parallel. return (Tensor, None, data.dtype, data.shape, data.init) data = data.init_data().asnumpy() elif isinstance(data, Tensor): # make a copy of Tensor to init the parameter return (Tensor, data.asnumpy(),) if isinstance(data, int): return (Tensor, data, mstype.int32) if isinstance(data, float): return (Tensor, data, mstype.float32) return (Tensor, data) def __str__(self): return f'Parameter (name={}, shape={self.shape}, dtype={self.dtype}, ' \ f'requires_grad={self.requires_grad})' def __repr__(self): return self.__str__() def __parameter__(self): """For parse check."""
[docs] def set_param_ps(self, init_in_server=False): """ Set whether the trainable parameter is updated by parameter server and whether the trainable parameter is initialized on server. Note: It only works when a running task is in the parameter server mode. Args: init_in_server (bool): Whether trainable parameter updated by parameter server is initialized on server. Default: False. """ if not(_is_role_worker() or _is_role_pserver() or _is_role_sched()): raise RuntimeError("Must complete following two steps before calling set_param_ps: \ 1. set_ps_context(enable_ps=True) \ 2. export MS_ROLE environment variable.") if init_in_server and (not"embedding_table")): raise RuntimeError("Can not initialize parameter '{}' in server, only parameters of " "sparse operator support initialization in server.".format( self.is_param_ps = True self.init_in_server = init_in_server self.param_info.init_in_server = init_in_server
@property def inited_param(self): """ Get the new parameter after call the init_data. Default is a None, If `self` is a Parameter with out data, after call the `init_data` the initialized Parameter with data will be recorded here. """ return self._inited_param @property def name(self): """Get the name of the parameter.""" return @name.setter def name(self, name_): """ Define a name for the parameter. Args: name_ (`str` or `None`): The name of the parameter. When the parameter is None or an empty string, the default value `PARAMETER_NAME_DEFAULT` is used. """ if name_ is None: name_ = PARAMETER_NAME_DEFAULT elif isinstance(name_, str): name_ = name_.strip() if name_ == '': name_ = PARAMETER_NAME_DEFAULT if len(name_) > PARAMETER_NAME_PREFIX_MAX_LEN: raise ValueError("The length of the '{}' name should be less than {}.". format(name_, PARAMETER_NAME_PREFIX_MAX_LEN)) else: raise ValueError("The type of the name should be `str` or `None`.") if _is_role_worker() and self.cache_enable: if len(self.shape) != 2: raise RuntimeError("The dims of parameter '{}' must be 2, but got {}." .format(, len(self.shape))) _reinsert_hash_table_size(name_,, self.shape[0], self.shape[1]) = name_ @property def sliced(self): """Get slice status of the parameter.""" return self._sliced @sliced.setter def sliced(self, sliced_): self._sliced = sliced_ @property def comm_fusion(self): """Get the fusion type for communication operators corresponding to this parameter.""" return self.param_info.comm_fusion @comm_fusion.setter def comm_fusion(self, comm_fusion_): """ In `AUTO_PARALLEL` and `SEMI_AUTO_PARALLEL` mode, some communication operators used for parameters or gradients aggregation are inserted automatically.Set the fusion type for communication operators generated for this parameter. Only `Ascend` and `Graph` mode is supported. Args: comm_fusion_ (int): The value of fusion must be greater than or equal to 0. When the value of fusion is 0, operators will not be fused together. """ if context.get_context("mode") == context.PYNATIVE_MODE and "auto_parallel" in _get_parallel_mode(): raise RuntimeError("`comm_fusion` does not support PYNATIVE_MODE") Validator.check_non_negative_int(comm_fusion_) self.param_info.comm_fusion = comm_fusion_ @property def unique(self): """whether the parameter is already unique or not.""" return self._unique @unique.setter def unique(self, unique_): self._unique = unique_ @property def is_init(self): """ Get the initialization status of the parameter. In GE backend, the Parameter need a "init graph" to sync the data from host to device. This flag indicates whether the data as been sync to the device. This flag only work in GE, and it will be set to False in other backend. """ return self._is_init @is_init.setter def is_init(self, is_init_): """ Set init status of the parameter. Args: is_init_ (bool): The init status of the parameter. """ self._is_init = is_init_
[docs] def clone(self, init='same'): """ Clone the parameter. Args: init (Union[Tensor, str, numbers.Number]): Initialize the shape of the parameter. Default: 'same'. Returns: Parameter, a new parameter. """ x = copy(self) # pylint: disable=protected-access x.param_info = self.param_info.clone() x.is_init = False x.init = self.init x.is_param_ps = self.is_param_ps x.init_in_server = self.init_in_server x.cache_enable = self.cache_enable if self.cache_shape: x.cache_shape = self.cache_shape if init != 'same': shape = self.shape dtype = self.dtype x.set_data(initializer(init, shape=shape, dtype=dtype)) return x
@property def layerwise_parallel(self): return self.param_info.layerwise_parallel @layerwise_parallel.setter def layerwise_parallel(self, value=True): if not isinstance(value, bool): raise TypeError("`layerwise_parallel` parameter must be bool type") self.param_info.layerwise_parallel = value @property def parallel_optimizer(self): """Return whether the parameter requires weight shard for parallel optimizer.""" return self.param_info.parallel_optimizer @parallel_optimizer.setter def parallel_optimizer(self, value=True): if not isinstance(value, bool): raise TypeError("`parallel_optimizer` parameter must be bool type") self.param_info.parallel_optimizer = value @property def cache_enable(self): """Return whether the parameter is cache enable.""" return self.param_info.cache_enable @cache_enable.setter def cache_enable(self, value=True): if not isinstance(value, bool): raise TypeError("`cache_enable` parameter must be bool type") self.param_info.cache_enable = value @property def cache_shape(self): """Return the cache shape corresponding to the parameter if use cache.""" return self.param_info.cache_shape @cache_shape.setter def cache_shape(self, value): if not isinstance(value, (tuple, list)): raise TypeError("`cache_shape` parameter must be tuple or list type") self.param_info.cache_shape = value @property def requires_grad(self): """Return whether the parameter requires gradient.""" return self.param_info.requires_grad @requires_grad.setter def requires_grad(self, value=True): if not isinstance(value, bool): raise TypeError("`requires_grad` parameter must be bool type") self.param_info.requires_grad = value @property def data(self): return self def _update_tensor_data(self, data): "Update the parameter by a Tensor." if isinstance(self, Tensor): # for Tensor same shape: self.init_flag = False self.init = None return self.assign_value(data) # create a new tensor new_param = Parameter(data,, self.requires_grad) new_param.param_info = self.param_info return new_param
[docs] def set_data(self, data, slice_shape=False): """ Set `set_data` of current `Parameter`. Args: data (Union[Tensor, int, float]): new data. slice_shape (bool): If slice the parameter is set to true, the shape is not checked for consistency. Default: False. Returns: Parameter, the parameter after set data. """ def raise_type_error(incoming): raise TypeError(f"Incoming Parameter dtype can not be converted to current dtype implicitly. " f"Current dtype is {self.dtype}, and incoming is {incoming}. " f"Use .set_dtype(xxx) to change the dtype.") if not isinstance(data, (Tensor, int, float)): raise TypeError(f"Parameter data must be [`Tensor`, `int`, `float`] or a kind of `Tensor` " f"(like `Tensor`). But with type {type(data)}.") if isinstance(data, (int, float)): if self.dtype in mstype.int_type and isinstance(data, float): raise_type_error(mstype.float_) data = Tensor(data, self.dtype) # both not init. incoming_tensor_is_init = isinstance(data, Tensor) and not data.has_init current_tensor_is_init = isinstance(self, Tensor) and not self.has_init if incoming_tensor_is_init and not current_tensor_is_init: raise TypeError("Parameter is a `Tensor` and not initializered, `data` for `set_data`" "should be a Tensor. If you want to update it by Tensor, call method" "`init_parameters_data` of `Cell` to init and replace all the Parameter of" "network, then call this method.") if tuple(self.shape) != tuple(data.shape): # If Slice create Parameter shape can be change. if not slice_shape: raise ValueError(f"Can not change the shape of Parameter which has been initialized." f" Current shape is {self.shape}, and incoming is {data.shape}.") if self.dtype != data.dtype: if mstype.implicit_conversion_seq[self.dtype] < mstype.implicit_conversion_seq[data.dtype]: raise_type_error(data.dtype) else: from mindspore.ops import functional as F data = F.cast(data, self.dtype) if isinstance(data, Tensor) and data.has_init: # The parameter has been initializered, directly update by the data if current_tensor_is_init: self._update_tensor_data(data.init_data()) else: # also update the related inited parameter data if self.inited_param is not None: self.inited_param.set_data(data) self.init_mode = data elif incoming_tensor_is_init or current_tensor_is_init: self._update_tensor_data(data) else: raise ValueError(f"Not support to update the Parameter by {data}") self.sliced = slice_shape return self
[docs] def init_data(self, layout=None, set_sliced=False): """ Initialize the parameter data. Args: layout (Union[None, list(list(int))]): Parameter slice layout [dev_mat, tensor_map, slice_shape]. Default: None. - dev_mat (list(int)): Device matrix. - tensor_map (list(int)): Tensor map. - slice_shape (list(int)): Shape of slice. set_sliced (bool): True if the parameter is set sliced after initializing the data. Default: False. Raises: RuntimeError: If it is from Initializer, and parallel mode has changed after the Initializer created. Returns: Parameter, the `Parameter` after initializing data. If current `Parameter` was already initialized before, returns the same initialized `Parameter`. """ if self.is_default_input_init and self.is_in_parallel != _is_in_parallel_mode(): raise RuntimeError("Must set or change parallel mode before any Tensor created.") if self.init_mode is None: return self if self.inited_param is not None: return self.inited_param if _is_role_worker() and self.cache_enable: global_seed, op_seed = _get_global_and_op_seed() _insert_weight_init_info(, global_seed, op_seed) init_data_args = () if layout is not None: if not isinstance(layout, tuple): raise TypeError("The layout should be tuple, but got layout is {}.".format(layout)) if len(layout) < 3: raise ValueError("The length of layout must be larger than 2, but got layout is {}.".format(layout)) slice_index = int(_get_slice_index(layout[0], layout[1])) init_data_args += (slice_index, layout[2], layout[5]) if self.init_in_server and self.is_param_ps and isinstance(self.init_mode, Tensor) and \ self.init_mode.init is not None and (_is_role_worker() or _is_role_sched()): data = self.init_mode.init_data(0, [1]) else: data = self.init_mode.init_data(*init_data_args) obj = self._update_tensor_data(data) if id(obj) != id(self): self._inited_param = obj obj.init_mode = None obj.sliced = set_sliced return obj
[docs]class ParameterTuple(tuple): """ Class for storing tuple of parameters. Note: It is used to store the parameters of the network into the parameter tuple collection. """ def __new__(cls, iterable): """Create instance object of ParameterTuple.""" data = tuple(iterable) ids = set() orders = {} for x in data: if not isinstance(x, Parameter): raise TypeError(f"ParameterTuple input should be `Parameter` collection." f"But got a {type(iterable)}, {iterable}") if id(x) not in ids: ids.add(id(x)) if not in orders.keys(): orders[] = [0, x] else: if isinstance(orders[], list): name = orders[name][1].name = name + "_" + str(0) = + "_" + str(1) orders[name] = 1 else: orders[] += 1 = + "_" + str(orders[]) return tuple.__new__(ParameterTuple, tuple(data))
[docs] def clone(self, prefix, init='same'): """ Clone the parameter. Args: prefix (str): Namespace of parameter. init (str): Initialize the shape of the parameter. Default: 'same'. Returns: Tuple, the new Parameter tuple. """ Validator.check_str_by_regular(prefix) new = [] for x in self: x1 = x.clone(init) = prefix + "." + new.append(x1) if not x1.cache_enable: continue if not"embedding_table"): raise RuntimeError("Can not enable cache for parameter '{}', Only parameters of " "sparse operator support enable cache.".format( if _is_role_worker(): _clone_hash_table(, _insert_accumu_init_info(, init_to_value(init)) return ParameterTuple(new)
def __parameter_tuple__(self): """For parse check."""