mirror of https://github.com/hpcaitech/ColossalAI
659 lines
30 KiB
Python
659 lines
30 KiB
Python
import math
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from typing import Callable
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import torch
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import torch.nn as nn
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import torch.nn.functional as F
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from colossalai.communication import broadcast
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from colossalai.context import ParallelMode, seed
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from colossalai.core import global_context as gpc
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from colossalai.global_variables import tensor_parallel_env as env
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from colossalai.nn import init as init
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from colossalai.registry import LAYERS
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from colossalai.utils.cuda import get_current_device
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from torch import Tensor
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from torch.nn import Parameter
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from ..base_layer import ParallelLayer
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from ..utils import divide, set_tensor_parallel_attribute_by_partition, to_2tuple
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from ._operation import (add_bias_2p5d, Matmul_AB_2p5D, Matmul_ABT_2p5D, all_gather_tensor_2p5d, classifier_2p5d,
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layernorm_2p5d, reduce_scatter_tensor_2p5d, split_tensor_2p5d)
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from ._utils import assert_tesseract_initialization, get_tesseract_dim_dep_from_env
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@LAYERS.register_module
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class Linear2p5D(ParallelLayer):
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r"""Linear layer for 2.5D parallelism.
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Args:
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in_features (int): size of each input sample.
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out_features (int): size of each output sample.
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bias (bool, optional): If set to ``False``, the layer will not learn an additive bias, defaults to ``True``.
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dtype (:class:`torch.dtype`, optional): The dtype of parameters, defaults to None.
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skip_bias_add (bool, optional): If set to ``True``, it will skip bias add for linear layer,
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which is preserved for kernel fusion, defaults to False.
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weight_initializer (:class:`typing.Callable`, optional):
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The initializer of weight, defaults to kaiming uniform initializer.
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bias_initializer (:class:`typing.Callable`, optional):
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The initializer of bias, defaults to xavier uniform initializer.
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More details about ``initializer`` please refer to
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`init <https://github.com/hpcaitech/ColossalAI/blob/main/colossalai/nn/init.py>`_.
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"""
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def __init__(self,
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in_features: int,
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out_features: int,
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bias: bool = True,
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dtype: torch.dtype = None,
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skip_bias_add: bool = False,
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weight_initializer: Callable = init.kaiming_uniform_(a=math.sqrt(5)),
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bias_initializer: Callable = init.xavier_uniform_(a=1, scale=1)):
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super().__init__()
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self.in_features = in_features
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self.out_features = out_features
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self.skip_bias_add = skip_bias_add
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# parallel setting
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assert_tesseract_initialization()
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self.row_rank = gpc.get_local_rank(ParallelMode.PARALLEL_2P5D_COL)
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self.col_rank = gpc.get_local_rank(ParallelMode.PARALLEL_2P5D_ROW)
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self.dep_rank = gpc.get_local_rank(ParallelMode.PARALLEL_2P5D_DEP)
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self.tesseract_dim, _ = get_tesseract_dim_dep_from_env()
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# partitioning dimension
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self.input_size_per_partition = divide(in_features, self.tesseract_dim)
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self.hidden_size_per_partition = divide(out_features, self.tesseract_dim)
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# create weight, shape: [k/q, h/q]
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factory_kwargs = {'device': get_current_device(), 'dtype': dtype}
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self.weight = Parameter(
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torch.empty(self.input_size_per_partition, self.hidden_size_per_partition, **factory_kwargs))
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# create bias, shape: [h/q]
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if bias:
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self.bias = Parameter(torch.empty(self.hidden_size_per_partition, **factory_kwargs))
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else:
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self.register_parameter('bias', None)
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# initialize parameters
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with seed(ParallelMode.TENSOR):
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self.reset_parameters(weight_initializer, bias_initializer)
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self._set_tensor_parallel_attributes()
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def _set_tensor_parallel_attributes(self):
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set_tensor_parallel_attribute_by_partition(self.weight, self.tesseract_dim**2)
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if self.bias is not None:
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set_tensor_parallel_attribute_by_partition(self.bias, self.tesseract_dim)
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def reset_parameters(self, weight_initializer, bias_initializer) -> None:
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fan_in, fan_out = self.in_features, self.out_features
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weight_initializer(self.weight, fan_in=fan_in, fan_out=fan_out)
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if self.bias is not None:
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bias_initializer(self.bias, fan_in=fan_in)
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def forward(self, x: Tensor) -> Tensor:
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# input: [m/dq, n/q, k/q]
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# output: [m/dq, n/q, h/q]
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out_shape = x.shape[:-1] + (self.hidden_size_per_partition, )
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output = Matmul_AB_2p5D.apply(
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x,
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self.weight,
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self.tesseract_dim,
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out_shape,
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self.row_rank,
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self.col_rank,
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self.dep_rank,
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ParallelMode.PARALLEL_2P5D_ROW,
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ParallelMode.PARALLEL_2P5D_COL,
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self.data_parallel_rank,
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self.pipeline_parallel_rank,
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self.pipeline_parallel_size,
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self.tensor_parallel_size,
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)
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if self.bias is not None:
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if self.skip_bias_add:
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bias = add_bias_2p5d(None, self.bias, self.hidden_size_per_partition, self.tesseract_dim, self.row_rank,
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self.col_rank, self.dep_rank, ParallelMode.PARALLEL_2P5D_COL, True,
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self.data_parallel_rank, self.pipeline_parallel_rank, self.pipeline_parallel_size,
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self.tensor_parallel_size)
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return output, bias
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else:
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output = add_bias_2p5d(output, self.bias, self.hidden_size_per_partition, self.tesseract_dim,
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self.row_rank, self.col_rank, self.dep_rank, ParallelMode.PARALLEL_2P5D_COL,
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False, self.data_parallel_rank, self.pipeline_parallel_rank,
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self.pipeline_parallel_size, self.tensor_parallel_size)
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return output
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else:
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return output
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@LAYERS.register_module
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class LayerNorm2p5D(ParallelLayer):
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r"""Layer Normalization for 2.5D parallelism.
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Args:
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normalized_shape (int): input shape from an expected input of size.
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:math:`[* \times \text{normalized_shape}[0] \times \text{normalized_shape}[1]
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\times \ldots \times \text{normalized_shape}[-1]]`
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If a single integer is used, it is treated as a singleton list, and this module will
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normalize over the last dimension which is expected to be of that specific size.
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eps (float, optional): a value added to the denominator for numerical stability, defaults to 1e-05.
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dtype (:class:`torch.dtype`, optional): The dtype of parameters, defaults to None.
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"""
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def __init__(self, normalized_shape: int, eps: float = 1e-05, dtype=None):
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super().__init__()
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# layer norm config
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self.normalized_shape = normalized_shape
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self.variance_epsilon = eps
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# parallel setting
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assert_tesseract_initialization()
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self.row_rank = gpc.get_local_rank(ParallelMode.PARALLEL_2P5D_COL)
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self.col_rank = gpc.get_local_rank(ParallelMode.PARALLEL_2P5D_ROW)
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self.dep_rank = gpc.get_local_rank(ParallelMode.PARALLEL_2P5D_DEP)
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self.tesseract_dim, _ = get_tesseract_dim_dep_from_env()
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# partitioning dimension
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self.partitioned_partition = divide(normalized_shape, self.tesseract_dim) # *
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# create parameters
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factory_kwargs = {'device': get_current_device(), 'dtype': dtype}
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self.gamma = Parameter(torch.ones(self.partitioned_partition, **factory_kwargs))
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self.beta = Parameter(torch.zeros(self.partitioned_partition, **factory_kwargs))
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self._set_tensor_parallel_attribute()
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def _set_tensor_parallel_attribute(self):
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set_tensor_parallel_attribute_by_partition(self.gamma, self.tesseract_dim)
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set_tensor_parallel_attribute_by_partition(self.beta, self.tesseract_dim)
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def forward(self, x: Tensor) -> Tensor:
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with torch.no_grad():
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E_x = torch.sum(x, dim=-1, keepdim=True) # [b/q, s, 1]
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torch.distributed.all_reduce(E_x, group=gpc.get_group(ParallelMode.PARALLEL_2P5D_ROW))
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E_x /= self.normalized_shape
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# Var_x in the block below is the sum of input^2
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Var_x = torch.sum(x * x, dim=-1, keepdim=True) # [b/q, s, 1]
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torch.distributed.all_reduce(Var_x, group=gpc.get_group(ParallelMode.PARALLEL_2P5D_ROW))
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Var_x /= self.normalized_shape
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Var_x = Var_x - E_x * E_x # variance of x [b/q, s, 1]
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# this time 1/sqrt(Var_x + epsilon)
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Var_x = 1.0 / torch.sqrt(Var_x + self.variance_epsilon)
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output = layernorm_2p5d(x, E_x, Var_x, self.normalized_shape, ParallelMode.PARALLEL_2P5D_ROW)
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bias = add_bias_2p5d(None, self.beta, self.partitioned_partition, self.tesseract_dim, self.row_rank,
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self.col_rank, self.dep_rank, ParallelMode.PARALLEL_2P5D_COL, True,
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self.data_parallel_rank, self.pipeline_parallel_rank, self.pipeline_parallel_size,
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self.tensor_parallel_size)
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scale = add_bias_2p5d(None, self.gamma, self.partitioned_partition, self.tesseract_dim, self.row_rank,
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self.col_rank, self.dep_rank, ParallelMode.PARALLEL_2P5D_COL, True,
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self.data_parallel_rank, self.pipeline_parallel_rank, self.pipeline_parallel_size,
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self.tensor_parallel_size)
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output = torch.addcmul(bias, scale, output)
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return output
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@LAYERS.register_module
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class PatchEmbedding2p5D(ParallelLayer):
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r"""2D Image to Patch Embedding.
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Args:
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img_size (int): image size.
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patch_size (int): patch size.
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in_chans (int): number of channels of input image.
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embed_size (int): size of embedding.
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dtype (:class:`torch.dtype`, optional): The dtype of parameters, defaults to None.
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flatten (bool, optional): whether to flatten output tensor, defaults to True.
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weight_initializer (:class:`typing.Callable`, optional):
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The initializer of weight, defaults to kaiming uniform initializer.
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bias_initializer (:class:`typing.Callable`, optional):
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The initializer of bias, defaults to xavier uniform initializer.
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position_embed_initializer (:class:`typing.Callable`, optional):
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The initializer of position embedding, defaults to zeros initializer.
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More details about ``initializer`` please refer to
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`init <https://github.com/hpcaitech/ColossalAI/blob/main/colossalai/nn/init.py>`_.
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"""
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def __init__(self,
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img_size: int,
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patch_size: int,
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in_chans: int,
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embed_size: int,
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flatten: bool = True,
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dtype: torch.dtype = None,
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weight_initializer: Callable = init.kaiming_uniform_(a=math.sqrt(5)),
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bias_initializer: Callable = init.xavier_uniform_(a=1, scale=1),
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position_embed_initializer: Callable = init.zeros_()):
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super().__init__()
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img_size = to_2tuple(img_size)
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patch_size = to_2tuple(patch_size)
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assert_tesseract_initialization()
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self.tesseract_dim, self.tesseract_dep = get_tesseract_dim_dep_from_env()
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self.img_size = img_size
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self.patch_size = patch_size
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self.grid_size = (img_size[0] // patch_size[0], img_size[1] // patch_size[1])
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self.num_patches = self.grid_size[0] * self.grid_size[1]
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self.flatten = flatten
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self.embed_size = embed_size
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self.embed_size_per_partition = embed_size // self.tesseract_dim**2
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with seed(ParallelMode.TENSOR):
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self.weight = Parameter(
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torch.empty((self.embed_size_per_partition, in_chans, *self.patch_size),
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device=get_current_device(),
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dtype=dtype))
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self.bias = Parameter(torch.empty(self.embed_size_per_partition, device=get_current_device(), dtype=dtype))
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self.cls_token = Parameter(
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torch.zeros((1, 1, self.embed_size_per_partition), device=get_current_device(), dtype=dtype))
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self.pos_embed = Parameter(
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torch.zeros((1, self.num_patches + 1, self.embed_size_per_partition),
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device=get_current_device(),
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dtype=dtype))
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self.reset_parameters(weight_initializer, bias_initializer, position_embed_initializer)
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self._set_tensor_parallel_attribute()
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def _set_tensor_parallel_attribute(self):
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set_tensor_parallel_attribute_by_partition(self.weight, self.tesseract_dim**2)
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set_tensor_parallel_attribute_by_partition(self.bias, self.tesseract_dim**2)
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set_tensor_parallel_attribute_by_partition(self.cls_token, self.tesseract_dim**2)
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set_tensor_parallel_attribute_by_partition(self.pos_embed, self.tesseract_dim**2)
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def reset_parameters(self, weight_initializer, bias_initializer, position_embed_initializer):
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with seed(ParallelMode.TENSOR):
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fan_in, _ = nn.init._calculate_fan_in_and_fan_out(self.weight)
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fan_out = self.embed_size
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weight_initializer(self.weight, fan_in=fan_in, fan_out=fan_out)
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bias_initializer(self.bias, fan_in=fan_in)
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position_embed_initializer(self.pos_embed)
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def forward(self, input_: Tensor) -> Tensor:
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input_ = split_tensor_2p5d(input_, 0)
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B, C, H, W = input_.shape
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assert H == self.img_size[0] and W == self.img_size[1], \
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f"Input image size ({H}*{W}) doesn't match model ({self.img_size[0]}*{self.img_size[1]})."
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weight = all_gather_tensor_2p5d(self.weight, 0, ParallelMode.PARALLEL_2P5D_COL)
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bias = all_gather_tensor_2p5d(self.bias, 0, ParallelMode.PARALLEL_2P5D_COL)
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output = F.conv2d(input_, weight, bias, stride=self.patch_size)
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if self.flatten:
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output = output.flatten(2).transpose(1, 2) # BCHW -> BNC
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cls_token = all_gather_tensor_2p5d(self.cls_token, -1, ParallelMode.PARALLEL_2P5D_COL)
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pos_embed = all_gather_tensor_2p5d(self.pos_embed, -1, ParallelMode.PARALLEL_2P5D_COL)
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cls_token = cls_token.expand(output.shape[0], -1, -1)
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output = torch.cat((cls_token, output), dim=1)
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output = output + pos_embed
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return output
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@LAYERS.register_module
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class Embedding2p5D(ParallelLayer):
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r"""Embedding for 2.5D parallelism.
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Args:
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num_embeddings (int): number of embeddings.
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embedding_dim (int): dimension of embedding.
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padding_idx (int, optional): If specified, the entries at padding_idx do not contribute to the gradient;
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therefore, the embedding vector at padding_idx is not updated during training,
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i.e. it remains as a fixed “pad”, defaults to None.
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dtype (:class:`torch.dtype`, optional): The dtype of parameters, defaults to None.
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weight_initializer (:class:`typing.Callable`, optional):
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he initializer of weight, defaults to normal initializer.
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The ``args`` and ``kwargs`` used in :class:``torch.nn.functional.embedding`` should contain:
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::
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max_norm (float, optional): If given, each embedding vector with norm larger than max_norm is
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renormalized to have norm max_norm. Note: this will modify weight in-place.
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norm_type (float, optional): The p of the p-norm to compute for the max_norm option. Default 2.
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scale_grad_by_freq (bool, optional): If given, this will scale gradients by the inverse
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of frequency of the words in the mini-batch. Default False.
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sparse (bool, optional): If True, gradient w.r.t. weight will be a sparse tensor. Default False.
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More details about ``args`` and ``kwargs`` could be found in
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`Embedding <https://pytorch.org/docs/stable/generated/torch.nn.functional.embedding.html#torch.nn.functional.embedding>`_.
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More details about initializer please refer to
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`init <https://github.com/hpcaitech/ColossalAI/blob/main/colossalai/nn/init.py>`_
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"""
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def __init__(self,
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num_embeddings: int,
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embedding_dim: int,
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padding_idx: int = None,
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dtype: torch.dtype = None,
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weight_initializer: Callable = init.normal_(),
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*args,
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**kwargs):
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super().__init__()
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assert_tesseract_initialization()
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self.tesseract_dim, self.tesseract_dep = get_tesseract_dim_dep_from_env()
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self.num_embeddings = num_embeddings
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self.embed_dim = embedding_dim
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embed_dim_per_partition = embedding_dim // self.tesseract_dim**2
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self.padding_idx = padding_idx
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self.embed_args = args
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self.embed_kwargs = kwargs
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self.weight = Parameter(
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torch.empty((num_embeddings, embed_dim_per_partition), device=get_current_device(), dtype=dtype))
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self.reset_parameters(weight_initializer)
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self._set_tensor_parallel_attributes()
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def _set_tensor_parallel_attributes(self):
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set_tensor_parallel_attribute_by_partition(self.weight, self.tesseract_dim**2)
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def reset_parameters(self, weight_initializer) -> None:
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with seed(ParallelMode.TENSOR):
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fan_in, fan_out = self.num_embeddings, self.embed_dim
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weight_initializer(self.weight, fan_in=fan_in, fan_out=fan_out)
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self._fill_padding_idx_with_zero()
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def _fill_padding_idx_with_zero(self) -> None:
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if self.padding_idx is not None:
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with torch.no_grad():
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self.weight[self.padding_idx].fill_(0)
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def forward(self, input_: Tensor) -> Tensor:
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input_ = split_tensor_2p5d(input_, 0)
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weight = all_gather_tensor_2p5d(self.weight, -1, ParallelMode.PARALLEL_2P5D_COL)
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output = F.embedding(input_, weight, self.padding_idx, *self.embed_args, **self.embed_kwargs)
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return output
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@LAYERS.register_module
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class VocabParallelEmbedding2p5D(torch.nn.Module):
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"""Embedding parallelized in the vocabulary dimension.
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Args:
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num_embeddings (int): number of embeddings.
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embedding_dim (int): dimension of embedding.
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padding_idx (int, optional): If specified, the entries at padding_idx do not contribute to the gradient;
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therefore, the embedding vector at padding_idx is not updated during training,
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i.e. it remains as a fixed “pad”, defaults to None.
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dtype (:class:`torch.dtype`, optional): The dtype of parameters, defaults to None.
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weight_initializer (:class:`typing.Callable`, optional):
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he initializer of weight, defaults to normal initializer.
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The ``args`` and ``kwargs`` used in :class:``torch.nn.functional.embedding`` should contain:
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|
::
|
|
|
|
max_norm (float, optional): If given, each embedding vector with norm larger than max_norm is
|
|
renormalized to have norm max_norm. Note: this will modify weight in-place.
|
|
norm_type (float, optional): The p of the p-norm to compute for the max_norm option. Default 2.
|
|
scale_grad_by_freq (bool, optional): If given, this will scale gradients by the inverse
|
|
of frequency of the words in the mini-batch. Default False.
|
|
sparse (bool, optional): If True, gradient w.r.t. weight will be a sparse tensor. Default False.
|
|
|
|
More details about ``args`` and ``kwargs`` could be found in
|
|
`Embedding <https://pytorch.org/docs/stable/generated/torch.nn.functional.embedding.html#torch.nn.functional.embedding>`_.
|
|
|
|
More details about initializer please refer to
|
|
`init <https://github.com/hpcaitech/ColossalAI/blob/main/colossalai/nn/init.py>`_.
|
|
"""
|
|
def __init__(self,
|
|
num_embeddings: int,
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|
embedding_dim: int,
|
|
padding_idx: int = None,
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|
dtype: torch.dtype = None,
|
|
weight_initializer: Callable = init.normal_(),
|
|
*args,
|
|
**kwargs):
|
|
super().__init__()
|
|
self.num_embeddings = num_embeddings
|
|
self.embed_dim = embedding_dim
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|
self.padding_idx = padding_idx
|
|
self.embed_args = args
|
|
self.embed_kwargs = kwargs
|
|
|
|
assert_tesseract_initialization()
|
|
self.tesseract_dim, self.tesseract_dep = get_tesseract_dim_dep_from_env()
|
|
self.num_embeddings_per_partition = divide(self.num_embeddings, self.tesseract_dim)
|
|
self.embed_dim_per_partition = divide(self.embed_dim, self.tesseract_dim)
|
|
tensor_parallel_rank = gpc.get_local_rank(ParallelMode.PARALLEL_2P5D_COL)
|
|
self.vocab_start_index = tensor_parallel_rank * self.num_embeddings_per_partition
|
|
self.vocab_end_index = self.vocab_start_index + self.num_embeddings_per_partition
|
|
|
|
self.weight = Parameter(
|
|
torch.empty((self.num_embeddings_per_partition, self.embed_dim_per_partition),
|
|
device=get_current_device(),
|
|
dtype=dtype))
|
|
|
|
self.reset_parameters(weight_initializer)
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|
self._set_tensor_parallel_attributes()
|
|
env.vocab_parallel = True
|
|
|
|
def _set_tensor_parallel_attributes(self):
|
|
set_tensor_parallel_attribute_by_partition(self.weight, self.tesseract_dim**2)
|
|
|
|
def reset_parameters(self, weight_initializer) -> None:
|
|
with seed(ParallelMode.TENSOR):
|
|
fan_in, fan_out = self.num_embeddings, self.embed_dim
|
|
weight_initializer(self.weight, fan_in=fan_in, fan_out=fan_out)
|
|
self._fill_padding_idx_with_zero()
|
|
|
|
def _fill_padding_idx_with_zero(self) -> None:
|
|
if self.padding_idx is not None and \
|
|
self.vocab_start_index <= self.padding_idx < self.vocab_end_index:
|
|
with torch.no_grad():
|
|
self.weight[self.padding_idx - self.vocab_start_index].fill_(0)
|
|
|
|
def forward(self, input_: Tensor) -> Tensor:
|
|
# Build the mask.
|
|
input_mask = (input_ < self.vocab_start_index) | (input_ >= self.vocab_end_index)
|
|
# Mask the input.
|
|
masked_input = input_.clone() - self.vocab_start_index
|
|
masked_input[input_mask] = 0
|
|
|
|
output_parallel = F.embedding(masked_input, self.weight, self.padding_idx, *self.embed_args,
|
|
**self.embed_kwargs)
|
|
|
|
# Mask the output embedding.
|
|
output_parallel[input_mask, :] = 0.
|
|
# Reduce across all the model parallel GPUs.
|
|
output = reduce_scatter_tensor_2p5d(output_parallel, 0, ParallelMode.PARALLEL_2P5D_COL)
|
|
return output
|
|
|
|
|
|
@LAYERS.register_module
|
|
class Classifier2p5D(ParallelLayer):
|
|
r"""Classifier for 2.5D parallelism.
|
|
|
|
Args:
|
|
in_features (int): size of each input sample.
|
|
num_classes (int): number of classes.
|
|
weight (:class:`torch.nn.Parameter`, optional): weight of the classifier, defaults to None.
|
|
bias (bool, optional): If set to ``False``, the layer will not learn an additive bias, defaults to ``True``.
|
|
dtype (:class:`torch.dtype`, optional): The dtype of parameters, defaults to None.
|
|
weight_initializer (:class:`typing.Callable`, optional):
|
|
The initializer of weight, defaults to kaiming uniform initializer.
|
|
bias_initializer (:class:`typing.Callable`, optional):
|
|
The initializer of bias, defaults to xavier uniform initializer.
|
|
|
|
More details about ``initializer`` please refer to
|
|
`init <https://github.com/hpcaitech/ColossalAI/blob/main/colossalai/nn/init.py>`_.
|
|
"""
|
|
def __init__(self,
|
|
in_features: int,
|
|
num_classes: int,
|
|
weight: Parameter = None,
|
|
bias: bool = True,
|
|
dtype: torch.dtype = None,
|
|
weight_initializer: Callable = init.kaiming_uniform_(a=math.sqrt(5)),
|
|
bias_initializer: Callable = init.xavier_uniform_(a=1, scale=1)):
|
|
super().__init__()
|
|
self.in_features = in_features
|
|
self.num_classes = num_classes
|
|
assert_tesseract_initialization()
|
|
self.row_rank = gpc.get_local_rank(ParallelMode.PARALLEL_2P5D_COL)
|
|
self.col_rank = gpc.get_local_rank(ParallelMode.PARALLEL_2P5D_ROW)
|
|
self.dep_rank = gpc.get_local_rank(ParallelMode.PARALLEL_2P5D_DEP)
|
|
self.tesseract_dim, self.tesseract_dep = get_tesseract_dim_dep_from_env()
|
|
|
|
# partitioning dimension
|
|
self.input_size_per_partition = divide(self.in_features, self.tesseract_dim**2)
|
|
|
|
if weight is not None:
|
|
self.weight = weight
|
|
self.has_weight = False
|
|
else:
|
|
self.weight = Parameter(
|
|
torch.empty(self.num_classes, self.input_size_per_partition, device=get_current_device(), dtype=dtype))
|
|
self.has_weight = True
|
|
if bias:
|
|
self.bias = Parameter(torch.zeros(self.num_classes, device=get_current_device(), dtype=dtype))
|
|
else:
|
|
self.bias = None
|
|
|
|
self.reset_parameters(weight_initializer, bias_initializer)
|
|
self._set_tensor_parallel_attributes()
|
|
|
|
def _set_tensor_parallel_attributes(self):
|
|
if self.has_weight:
|
|
set_tensor_parallel_attribute_by_partition(self.weight, self.tesseract_dim**2)
|
|
|
|
def reset_parameters(self, weight_initializer, bias_initializer) -> None:
|
|
with seed(ParallelMode.TENSOR):
|
|
fan_in, fan_out = self.in_features, self.num_classes
|
|
col_src_rank = gpc.get_ranks_in_group(ParallelMode.PARALLEL_2P5D_COL)[0]
|
|
row_src_rank = gpc.get_ranks_in_group(ParallelMode.PARALLEL_2P5D_ROW)[0]
|
|
|
|
if self.has_weight:
|
|
weight_initializer(self.weight, fan_in=fan_in, fan_out=fan_out)
|
|
|
|
if self.bias is not None:
|
|
bias_initializer(self.bias, fan_in=fan_in)
|
|
broadcast(self.bias, col_src_rank, ParallelMode.PARALLEL_2P5D_COL)
|
|
broadcast(self.bias, row_src_rank, ParallelMode.PARALLEL_2P5D_ROW)
|
|
|
|
def forward(self, input_: Tensor) -> Tensor:
|
|
out_shape = input_.shape[:-1] + (self.num_classes, )
|
|
|
|
return classifier_2p5d(input_, self.weight, self.bias, self.tesseract_dim, out_shape, self.row_rank,
|
|
self.col_rank, ParallelMode.PARALLEL_2P5D_ROW, ParallelMode.PARALLEL_2P5D_COL,
|
|
self.data_parallel_rank, self.pipeline_parallel_rank, self.pipeline_parallel_size,
|
|
self.tensor_parallel_size)
|
|
|
|
|
|
@LAYERS.register_module
|
|
class VocabParallelClassifier2p5D(ParallelLayer):
|
|
r"""Vocab parallel classifier layer for 2.5D parallelism.
|
|
|
|
Args:
|
|
in_features (int): size of each input sample.
|
|
num_classes (int): number of classes.
|
|
weight (:class:`torch.nn.Parameter`, optional): weight of the classifier, defaults to None.
|
|
bias (bool, optional): If set to ``False``, the layer will not learn an additive bias, defaults to ``True``.
|
|
dtype (:class:`torch.dtype`, optional): The dtype of parameters, defaults to None.
|
|
weight_initializer (:class:`typing.Callable`, optional):
|
|
The initializer of weight, defaults to kaiming uniform initializer.
|
|
bias_initializer (:class:`typing.Callable`, optional):
|
|
The initializer of bias, defaults to xavier uniform initializer.
|
|
|
|
More details about ``initializer`` please refer to
|
|
`init <https://github.com/hpcaitech/ColossalAI/blob/main/colossalai/nn/init.py>`_.
|
|
"""
|
|
def __init__(self,
|
|
in_features: int,
|
|
num_classes: int,
|
|
weight: Parameter = None,
|
|
bias: bool = True,
|
|
dtype: torch.dtype = None,
|
|
weight_initializer: Callable = init.kaiming_uniform_(a=math.sqrt(5)),
|
|
bias_initializer: Callable = init.xavier_uniform_(a=1, scale=1)):
|
|
super().__init__()
|
|
|
|
self.in_features = in_features
|
|
self.num_classes = num_classes
|
|
|
|
# parallel setting
|
|
assert_tesseract_initialization()
|
|
self.row_rank = gpc.get_local_rank(ParallelMode.PARALLEL_2P5D_COL)
|
|
self.col_rank = gpc.get_local_rank(ParallelMode.PARALLEL_2P5D_ROW)
|
|
self.dep_rank = gpc.get_local_rank(ParallelMode.PARALLEL_2P5D_DEP)
|
|
self.tesseract_dim, _ = get_tesseract_dim_dep_from_env()
|
|
|
|
# partitioning dimension
|
|
self.input_size_per_partition = divide(in_features, self.tesseract_dim)
|
|
self.hidden_size_per_partition = divide(num_classes, self.tesseract_dim)
|
|
|
|
# create weight, shape: [k/q, h/q]
|
|
factory_kwargs = {'device': get_current_device(), 'dtype': dtype}
|
|
if weight is not None:
|
|
self.weight = weight
|
|
self.has_weight = False
|
|
else:
|
|
self.weight = Parameter(
|
|
torch.empty(self.hidden_size_per_partition, self.input_size_per_partition, **factory_kwargs))
|
|
self.has_weight = True
|
|
# create bias, shape: [h/q]
|
|
if bias:
|
|
self.bias = Parameter(torch.empty(self.hidden_size_per_partition, **factory_kwargs))
|
|
else:
|
|
self.bias = None
|
|
|
|
# initialize parameters
|
|
with seed(ParallelMode.TENSOR):
|
|
self.reset_parameters(weight_initializer, bias_initializer)
|
|
self._set_tensor_parallel_attributes()
|
|
env.vocab_parallel = True
|
|
|
|
def _set_tensor_parallel_attributes(self):
|
|
if self.has_weight:
|
|
set_tensor_parallel_attribute_by_partition(self.weight, self.tesseract_dim**2)
|
|
if self.bias is not None:
|
|
set_tensor_parallel_attribute_by_partition(self.bias, self.tesseract_dim)
|
|
|
|
def reset_parameters(self, weight_initializer, bias_initializer) -> None:
|
|
fan_in, fan_out = self.in_features, self.num_classes
|
|
if self.has_weight:
|
|
weight_initializer(self.weight, fan_in=fan_in, fan_out=fan_out)
|
|
if self.bias is not None:
|
|
bias_initializer(self.bias, fan_in=fan_in)
|
|
|
|
def forward(self, x: Tensor) -> Tensor:
|
|
# input: [m/dq, n/q, k/q]
|
|
# output: [m/dq, n/q, h/q]
|
|
out_shape = x.shape[:-1] + (self.hidden_size_per_partition, )
|
|
|
|
output = Matmul_ABT_2p5D.apply(
|
|
x,
|
|
self.weight,
|
|
self.tesseract_dim,
|
|
out_shape,
|
|
self.row_rank,
|
|
self.col_rank,
|
|
self.dep_rank,
|
|
ParallelMode.PARALLEL_2P5D_ROW,
|
|
ParallelMode.PARALLEL_2P5D_COL,
|
|
self.data_parallel_rank,
|
|
self.pipeline_parallel_rank,
|
|
self.pipeline_parallel_size,
|
|
self.tensor_parallel_size,
|
|
)
|
|
|
|
if self.bias is not None:
|
|
output = add_bias_2p5d(output, self.bias, self.hidden_size_per_partition, self.tesseract_dim, self.row_rank,
|
|
self.col_rank, self.dep_rank, ParallelMode.PARALLEL_2P5D_COL, False,
|
|
self.data_parallel_rank, self.pipeline_parallel_rank, self.pipeline_parallel_size,
|
|
self.tensor_parallel_size)
|
|
return output
|