fix: modeling_deepseek.py should use `deepseek` instead of `deepseek_v2` architecture
Browse filesI have copied the file from https://huggingface.co/deepseek-ai/deepseek-moe-16b-chat/edit/main/modeling_deepseek.py
I believe that is the correct one since the model weight dict has matching keys (using the original self_attn architecture)
- modeling_deepseek.py +374 -730
modeling_deepseek.py
CHANGED
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@@ -5,7 +5,7 @@
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# and OPT implementations in this library. It has been modified from its
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# original forms to accommodate minor architectural differences compared
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# to GPT-NeoX and OPT used by the Meta AI team that trained the model.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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@@ -34,17 +34,11 @@ from transformers.modeling_attn_mask_utils import (
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AttentionMaskConverter,
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_prepare_4d_attention_mask,
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_prepare_4d_causal_attention_mask,
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)
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from transformers.modeling_outputs import
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BaseModelOutputWithPast,
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CausalLMOutputWithPast,
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SequenceClassifierOutputWithPast,
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)
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from transformers.modeling_utils import PreTrainedModel
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from transformers.pytorch_utils import
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ALL_LAYERNORM_LAYERS,
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is_torch_greater_or_equal_than_1_13,
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)
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from transformers.utils import (
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add_start_docstrings,
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add_start_docstrings_to_model_forward,
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@@ -54,9 +48,8 @@ from transformers.utils import (
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replace_return_docstrings,
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)
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from transformers.utils.import_utils import is_torch_fx_available
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-
from .configuration_deepseek import
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-
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import numpy as np
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if is_flash_attn_2_available():
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from flash_attn import flash_attn_func, flash_attn_varlen_func
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@@ -74,16 +67,14 @@ if is_torch_fx_available():
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logger = logging.get_logger(__name__)
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_CONFIG_FOR_DOC = "
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def _get_unpad_data(attention_mask):
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seqlens_in_batch = attention_mask.sum(dim=-1, dtype=torch.int32)
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indices = torch.nonzero(attention_mask.flatten(), as_tuple=False).flatten()
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max_seqlen_in_batch = seqlens_in_batch.max().item()
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cu_seqlens = F.pad(
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torch.cumsum(seqlens_in_batch, dim=0, dtype=torch.torch.int32), (1, 0)
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)
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return (
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indices,
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cu_seqlens,
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@@ -91,10 +82,28 @@ def _get_unpad_data(attention_mask):
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)
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-
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def __init__(self, hidden_size, eps=1e-6):
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"""
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-
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"""
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super().__init__()
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self.weight = nn.Parameter(torch.ones(hidden_size))
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@@ -108,34 +117,29 @@ class DeepseekV2RMSNorm(nn.Module):
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return self.weight * hidden_states.to(input_dtype)
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ALL_LAYERNORM_LAYERS.append(
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class
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def __init__(self, dim, max_position_embeddings=2048, base=10000, device=None):
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super().__init__()
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self.dim = dim
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self.max_position_embeddings = max_position_embeddings
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self.base = base
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-
inv_freq = 1.0 / (
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self.base ** (torch.arange(0, self.dim, 2).float().to(device) / self.dim)
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)
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self.register_buffer("inv_freq", inv_freq, persistent=False)
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# Build here to make `torch.jit.trace` work.
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self._set_cos_sin_cache(
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seq_len=max_position_embeddings,
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device=self.inv_freq.device,
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dtype=torch.get_default_dtype(),
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)
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self.max_seq_len_cached = None
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def _set_cos_sin_cache(self, seq_len, device, dtype):
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self.max_seq_len_cached = seq_len
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t = torch.arange(
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self.max_seq_len_cached, device=device, dtype=self.inv_freq.dtype
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)
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freqs = torch.outer(t, self.inv_freq.to(t.device))
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# Different from paper, but it uses a different permutation in order to obtain the same calculation
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@@ -154,26 +158,17 @@ class DeepseekV2RotaryEmbedding(nn.Module):
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)
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# Copied from transformers.models.llama.modeling_llama.LlamaLinearScalingRotaryEmbedding with Llama->
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class
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"""
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def __init__(
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self,
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dim,
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max_position_embeddings=2048,
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base=10000,
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device=None,
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scaling_factor=1.0,
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):
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self.scaling_factor = scaling_factor
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super().__init__(dim, max_position_embeddings, base, device)
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def _set_cos_sin_cache(self, seq_len, device, dtype):
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self.max_seq_len_cached = seq_len
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t = torch.arange(
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self.max_seq_len_cached, device=device, dtype=self.inv_freq.dtype
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)
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t = t / self.scaling_factor
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freqs = torch.outer(t, self.inv_freq)
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@@ -183,18 +178,11 @@ class DeepseekV2LinearScalingRotaryEmbedding(DeepseekV2RotaryEmbedding):
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self.register_buffer("sin_cached", emb.sin().to(dtype), persistent=False)
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# Copied from transformers.models.llama.modeling_llama.LlamaDynamicNTKScalingRotaryEmbedding with Llama->
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class
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"""
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def __init__(
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self,
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dim,
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max_position_embeddings=2048,
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base=10000,
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device=None,
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scaling_factor=1.0,
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):
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self.scaling_factor = scaling_factor
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super().__init__(dim, max_position_embeddings, base, device)
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@@ -203,17 +191,12 @@ class DeepseekV2DynamicNTKScalingRotaryEmbedding(DeepseekV2RotaryEmbedding):
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if seq_len > self.max_position_embeddings:
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base = self.base * (
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(self.scaling_factor * seq_len / self.max_position_embeddings)
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- (self.scaling_factor - 1)
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) ** (self.dim / (self.dim - 2))
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inv_freq = 1.0 / (
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base ** (torch.arange(0, self.dim, 2).float().to(device) / self.dim)
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)
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self.register_buffer("inv_freq", inv_freq, persistent=False)
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t = torch.arange(
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self.max_seq_len_cached, device=device, dtype=self.inv_freq.dtype
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)
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freqs = torch.outer(t, self.inv_freq)
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# Different from paper, but it uses a different permutation in order to obtain the same calculation
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@@ -222,111 +205,6 @@ class DeepseekV2DynamicNTKScalingRotaryEmbedding(DeepseekV2RotaryEmbedding):
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self.register_buffer("sin_cached", emb.sin().to(dtype), persistent=False)
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# Inverse dim formula to find dim based on number of rotations
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def yarn_find_correction_dim(
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num_rotations, dim, base=10000, max_position_embeddings=2048
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):
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return (dim * math.log(max_position_embeddings / (num_rotations * 2 * math.pi))) / (
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2 * math.log(base)
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)
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-
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-
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# Find dim range bounds based on rotations
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def yarn_find_correction_range(
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low_rot, high_rot, dim, base=10000, max_position_embeddings=2048
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):
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low = math.floor(
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yarn_find_correction_dim(low_rot, dim, base, max_position_embeddings)
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)
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high = math.ceil(
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yarn_find_correction_dim(high_rot, dim, base, max_position_embeddings)
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)
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return max(low, 0), min(high, dim - 1) # Clamp values just in case
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-
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-
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def yarn_get_mscale(scale=1, mscale=1):
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if scale <= 1:
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return 1.0
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return 0.1 * mscale * math.log(scale) + 1.0
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-
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-
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def yarn_linear_ramp_mask(min, max, dim):
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if min == max:
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max += 0.001 # Prevent singularity
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-
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linear_func = (torch.arange(dim, dtype=torch.float32) - min) / (max - min)
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ramp_func = torch.clamp(linear_func, 0, 1)
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return ramp_func
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-
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-
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class DeepseekV2YarnRotaryEmbedding(DeepseekV2RotaryEmbedding):
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def __init__(
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self,
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dim,
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max_position_embeddings=2048,
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base=10000,
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device=None,
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scaling_factor=1.0,
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original_max_position_embeddings=4096,
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beta_fast=32,
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beta_slow=1,
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mscale=1,
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mscale_all_dim=0,
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):
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self.scaling_factor = scaling_factor
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self.original_max_position_embeddings = original_max_position_embeddings
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self.beta_fast = beta_fast
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self.beta_slow = beta_slow
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self.mscale = mscale
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self.mscale_all_dim = mscale_all_dim
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super().__init__(dim, max_position_embeddings, base, device)
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-
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def _set_cos_sin_cache(self, seq_len, device, dtype):
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self.max_seq_len_cached = seq_len
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dim = self.dim
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freq_extra = 1.0 / (
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self.base
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** (torch.arange(0, dim, 2, dtype=torch.float32, device=device) / dim)
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)
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freq_inter = 1.0 / (
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self.scaling_factor
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* self.base
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** (torch.arange(0, dim, 2, dtype=torch.float32, device=device) / dim)
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)
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low, high = yarn_find_correction_range(
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self.beta_fast,
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self.beta_slow,
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dim,
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self.base,
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self.original_max_position_embeddings,
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)
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inv_freq_mask = 1.0 - yarn_linear_ramp_mask(low, high, dim // 2).to(
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device=device, dtype=torch.float32
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)
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inv_freq = freq_inter * (1 - inv_freq_mask) + freq_extra * inv_freq_mask
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self.register_buffer("inv_freq", inv_freq, persistent=False)
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t = torch.arange(seq_len, device=device, dtype=torch.float32)
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freqs = torch.outer(t, inv_freq)
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_mscale = float(
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yarn_get_mscale(self.scaling_factor, self.mscale)
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/ yarn_get_mscale(self.scaling_factor, self.mscale_all_dim)
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)
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emb = torch.cat((freqs, freqs), dim=-1)
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self.register_buffer(
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"cos_cached", (emb.cos() * _mscale).to(dtype), persistent=False
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)
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self.register_buffer(
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"sin_cached", (emb.sin() * _mscale).to(dtype), persistent=False
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)
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# Copied from transformers.models.llama.modeling_llama.rotate_half
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def rotate_half(x):
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"""Rotates half the hidden dims of the input."""
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@@ -359,26 +237,17 @@ def apply_rotary_pos_emb(q, k, cos, sin, position_ids, unsqueeze_dim=1):
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"""
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cos = cos[position_ids].unsqueeze(unsqueeze_dim)
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sin = sin[position_ids].unsqueeze(unsqueeze_dim)
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b, h, s, d = q.shape
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q = q.view(b, h, s, d // 2, 2).transpose(4, 3).reshape(b, h, s, d)
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b, h, s, d = k.shape
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k = k.view(b, h, s, d // 2, 2).transpose(4, 3).reshape(b, h, s, d)
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q_embed = (q * cos) + (rotate_half(q) * sin)
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k_embed = (k * cos) + (rotate_half(k) * sin)
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return q_embed, k_embed
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class
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def __init__(self, config, hidden_size=None, intermediate_size=None):
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super().__init__()
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self.config = config
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self.hidden_size = config.hidden_size if hidden_size is None else hidden_size
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self.intermediate_size =
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config.intermediate_size if intermediate_size is None else intermediate_size
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)
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self.gate_proj = nn.Linear(self.hidden_size, self.intermediate_size, bias=False)
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self.up_proj = nn.Linear(self.hidden_size, self.intermediate_size, bias=False)
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self.act_fn = ACT2FN[config.hidden_act]
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def forward(self, x):
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return down_proj
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@@ -396,75 +283,39 @@ class MoEGate(nn.Module):
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self.config = config
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self.top_k = config.num_experts_per_tok
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self.n_routed_experts = config.n_routed_experts
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-
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self.scoring_func = config.scoring_func
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self.alpha = config.aux_loss_alpha
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self.seq_aux = config.seq_aux
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self.topk_method = config.topk_method
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self.n_group = config.n_group
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self.topk_group = config.topk_group
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# topk selection algorithm
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self.norm_topk_prob = config.norm_topk_prob
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self.gating_dim = config.hidden_size
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self.weight = nn.Parameter(
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torch.empty((self.n_routed_experts, self.gating_dim))
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)
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self.reset_parameters()
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def reset_parameters(self) -> None:
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import torch.nn.init
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init.kaiming_uniform_(self.weight, a=math.sqrt(5))
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def forward(self, hidden_states):
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bsz, seq_len, h = hidden_states.shape
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### compute gating score
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hidden_states = hidden_states.view(-1, h)
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logits = F.linear(
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if self.scoring_func == "softmax":
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scores = logits.softmax(dim=-1, dtype=torch.float32)
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else:
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raise NotImplementedError(
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)
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-
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### select top-k experts
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scores, k=self.top_k, dim=-1, sorted=False
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)
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elif self.topk_method == "group_limited_greedy":
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group_scores = (
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scores.view(bsz * seq_len, self.n_group, -1).max(dim=-1).values
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) # [n, n_group]
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group_idx = torch.topk(
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group_scores, k=self.topk_group, dim=-1, sorted=False
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)[
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1
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] # [n, top_k_group]
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group_mask = torch.zeros_like(group_scores) # [n, n_group]
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group_mask.scatter_(1, group_idx, 1) # [n, n_group]
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score_mask = (
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group_mask.unsqueeze(-1)
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.expand(
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bsz * seq_len, self.n_group, self.n_routed_experts // self.n_group
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| 454 |
-
)
|
| 455 |
-
.reshape(bsz * seq_len, -1)
|
| 456 |
-
) # [n, e]
|
| 457 |
-
tmp_scores = scores.masked_fill(~score_mask.bool(), 0.0) # [n, e]
|
| 458 |
-
topk_weight, topk_idx = torch.topk(
|
| 459 |
-
tmp_scores, k=self.top_k, dim=-1, sorted=False
|
| 460 |
-
)
|
| 461 |
-
|
| 462 |
### norm gate to sum 1
|
| 463 |
if self.top_k > 1 and self.norm_topk_prob:
|
| 464 |
denominator = topk_weight.sum(dim=-1, keepdim=True) + 1e-20
|
| 465 |
topk_weight = topk_weight / denominator
|
| 466 |
-
|
| 467 |
-
topk_weight = topk_weight * self.routed_scaling_factor
|
| 468 |
### expert-level computation auxiliary loss
|
| 469 |
if self.training and self.alpha > 0.0:
|
| 470 |
scores_for_aux = scores
|
|
@@ -473,21 +324,11 @@ class MoEGate(nn.Module):
|
|
| 473 |
topk_idx_for_aux_loss = topk_idx.view(bsz, -1)
|
| 474 |
if self.seq_aux:
|
| 475 |
scores_for_seq_aux = scores_for_aux.view(bsz, seq_len, -1)
|
| 476 |
-
ce = torch.zeros(
|
| 477 |
-
|
| 478 |
-
)
|
| 479 |
-
ce.scatter_add_(
|
| 480 |
-
1,
|
| 481 |
-
topk_idx_for_aux_loss,
|
| 482 |
-
torch.ones(bsz, seq_len * aux_topk, device=hidden_states.device),
|
| 483 |
-
).div_(seq_len * aux_topk / self.n_routed_experts)
|
| 484 |
-
aux_loss = (ce * scores_for_seq_aux.mean(dim=1)).sum(
|
| 485 |
-
dim=1
|
| 486 |
-
).mean() * self.alpha
|
| 487 |
else:
|
| 488 |
-
mask_ce = F.one_hot(
|
| 489 |
-
topk_idx_for_aux_loss.view(-1), num_classes=self.n_routed_experts
|
| 490 |
-
)
|
| 491 |
ce = mask_ce.float().mean(0)
|
| 492 |
Pi = scores_for_aux.mean(0)
|
| 493 |
fi = ce * self.n_routed_experts
|
|
@@ -499,10 +340,9 @@ class MoEGate(nn.Module):
|
|
| 499 |
|
| 500 |
class AddAuxiliaryLoss(torch.autograd.Function):
|
| 501 |
"""
|
| 502 |
-
The trick function of adding auxiliary (aux) loss,
|
| 503 |
which includes the gradient of the aux loss during backpropagation.
|
| 504 |
"""
|
| 505 |
-
|
| 506 |
@staticmethod
|
| 507 |
def forward(ctx, x, loss):
|
| 508 |
assert loss.numel() == 1
|
|
@@ -516,53 +356,22 @@ class AddAuxiliaryLoss(torch.autograd.Function):
|
|
| 516 |
if ctx.required_aux_loss:
|
| 517 |
grad_loss = torch.ones(1, dtype=ctx.dtype, device=grad_output.device)
|
| 518 |
return grad_output, grad_loss
|
| 519 |
-
|
| 520 |
-
|
| 521 |
-
class
|
| 522 |
"""
|
| 523 |
A mixed expert module containing shared experts.
|
| 524 |
"""
|
| 525 |
-
|
| 526 |
def __init__(self, config):
|
| 527 |
super().__init__()
|
| 528 |
self.config = config
|
| 529 |
self.num_experts_per_tok = config.num_experts_per_tok
|
| 530 |
-
|
| 531 |
-
if hasattr(config, "ep_size") and config.ep_size > 1:
|
| 532 |
-
assert config.ep_size == dist.get_world_size()
|
| 533 |
-
self.ep_size = config.ep_size
|
| 534 |
-
self.experts_per_rank = config.n_routed_experts // config.ep_size
|
| 535 |
-
self.ep_rank = dist.get_rank()
|
| 536 |
-
self.experts = nn.ModuleList(
|
| 537 |
-
[
|
| 538 |
-
(
|
| 539 |
-
DeepseekV2MLP(
|
| 540 |
-
config, intermediate_size=config.moe_intermediate_size
|
| 541 |
-
)
|
| 542 |
-
if i >= self.ep_rank * self.experts_per_rank
|
| 543 |
-
and i < (self.ep_rank + 1) * self.experts_per_rank
|
| 544 |
-
else None
|
| 545 |
-
)
|
| 546 |
-
for i in range(config.n_routed_experts)
|
| 547 |
-
]
|
| 548 |
-
)
|
| 549 |
-
else:
|
| 550 |
-
self.ep_size = 1
|
| 551 |
-
self.experts_per_rank = config.n_routed_experts
|
| 552 |
-
self.ep_rank = 0
|
| 553 |
-
self.experts = nn.ModuleList(
|
| 554 |
-
[
|
| 555 |
-
DeepseekV2MLP(config, intermediate_size=config.moe_intermediate_size)
|
| 556 |
-
for i in range(config.n_routed_experts)
|
| 557 |
-
]
|
| 558 |
-
)
|
| 559 |
self.gate = MoEGate(config)
|
| 560 |
if config.n_shared_experts is not None:
|
| 561 |
intermediate_size = config.moe_intermediate_size * config.n_shared_experts
|
| 562 |
-
self.shared_experts =
|
| 563 |
-
|
| 564 |
-
)
|
| 565 |
-
|
| 566 |
def forward(self, hidden_states):
|
| 567 |
identity = hidden_states
|
| 568 |
orig_shape = hidden_states.shape
|
|
@@ -570,96 +379,36 @@ class DeepseekV2MoE(nn.Module):
|
|
| 570 |
hidden_states = hidden_states.view(-1, hidden_states.shape[-1])
|
| 571 |
flat_topk_idx = topk_idx.view(-1)
|
| 572 |
if self.training:
|
| 573 |
-
hidden_states = hidden_states.repeat_interleave(
|
| 574 |
-
self.num_experts_per_tok, dim=0
|
| 575 |
-
)
|
| 576 |
y = torch.empty_like(hidden_states)
|
| 577 |
for i, expert in enumerate(self.experts):
|
| 578 |
y[flat_topk_idx == i] = expert(hidden_states[flat_topk_idx == i])
|
| 579 |
y = (y.view(*topk_weight.shape, -1) * topk_weight.unsqueeze(-1)).sum(dim=1)
|
| 580 |
-
y =
|
| 581 |
y = AddAuxiliaryLoss.apply(y, aux_loss)
|
| 582 |
else:
|
| 583 |
-
y = self.moe_infer(hidden_states,
|
| 584 |
if self.config.n_shared_experts is not None:
|
| 585 |
y = y + self.shared_experts(identity)
|
| 586 |
return y
|
| 587 |
-
|
| 588 |
@torch.no_grad()
|
| 589 |
-
def moe_infer(self, x,
|
| 590 |
-
|
| 591 |
-
|
| 592 |
-
tokens_per_expert =
|
| 593 |
-
|
| 594 |
-
|
| 595 |
-
|
| 596 |
-
|
| 597 |
-
tokens_per_ep_rank = tokens_per_expert.view(self.ep_size, -1).sum(dim=1)
|
| 598 |
-
tokens_per_expert_group = tokens_per_expert.new_empty(
|
| 599 |
-
tokens_per_expert.shape[0]
|
| 600 |
-
)
|
| 601 |
-
dist.all_to_all_single(tokens_per_expert_group, tokens_per_expert)
|
| 602 |
-
output_splits = (
|
| 603 |
-
tokens_per_expert_group.view(self.ep_size, -1)
|
| 604 |
-
.sum(1)
|
| 605 |
-
.cpu()
|
| 606 |
-
.numpy()
|
| 607 |
-
.tolist()
|
| 608 |
-
)
|
| 609 |
-
gathered_tokens = sorted_tokens.new_empty(
|
| 610 |
-
tokens_per_expert_group.sum(dim=0).cpu().item(), sorted_tokens.shape[1]
|
| 611 |
-
)
|
| 612 |
-
input_split_sizes = tokens_per_ep_rank.cpu().numpy().tolist()
|
| 613 |
-
dist.all_to_all(
|
| 614 |
-
list(gathered_tokens.split(output_splits)),
|
| 615 |
-
list(sorted_tokens.split(input_split_sizes)),
|
| 616 |
-
)
|
| 617 |
-
tokens_per_expert_post_gather = tokens_per_expert_group.view(
|
| 618 |
-
self.ep_size, self.experts_per_rank
|
| 619 |
-
).sum(dim=0)
|
| 620 |
-
gatherd_idxs = np.zeros(shape=(gathered_tokens.shape[0],), dtype=np.int32)
|
| 621 |
-
s = 0
|
| 622 |
-
for i, k in enumerate(tokens_per_expert_group.cpu().numpy()):
|
| 623 |
-
gatherd_idxs[s : s + k] = i % self.experts_per_rank
|
| 624 |
-
s += k
|
| 625 |
-
gatherd_idxs = gatherd_idxs.argsort()
|
| 626 |
-
sorted_tokens = gathered_tokens[gatherd_idxs]
|
| 627 |
-
tokens_per_expert = tokens_per_expert_post_gather
|
| 628 |
-
tokens_per_expert = tokens_per_expert.cpu().numpy()
|
| 629 |
-
|
| 630 |
-
outputs = []
|
| 631 |
-
start_idx = 0
|
| 632 |
-
for i, num_tokens in enumerate(tokens_per_expert):
|
| 633 |
-
end_idx = start_idx + num_tokens
|
| 634 |
-
if num_tokens == 0:
|
| 635 |
continue
|
| 636 |
-
expert = self.experts[i
|
| 637 |
-
|
| 638 |
-
|
| 639 |
-
|
| 640 |
-
start_idx
|
| 641 |
-
|
| 642 |
-
|
| 643 |
-
if self.ep_size > 1:
|
| 644 |
-
new_x = torch.empty_like(outs)
|
| 645 |
-
new_x[gatherd_idxs] = outs
|
| 646 |
-
gathered_tokens = new_x.new_empty(*sorted_tokens_shape)
|
| 647 |
-
dist.all_to_all(
|
| 648 |
-
list(gathered_tokens.split(input_split_sizes)),
|
| 649 |
-
list(new_x.split(output_splits)),
|
| 650 |
-
)
|
| 651 |
-
outs = gathered_tokens
|
| 652 |
-
|
| 653 |
-
new_x = torch.empty_like(outs)
|
| 654 |
-
new_x[idxs] = outs
|
| 655 |
-
final_out = (
|
| 656 |
-
new_x.view(*topk_ids.shape, -1)
|
| 657 |
-
.type(topk_weight.dtype)
|
| 658 |
-
.mul_(topk_weight.unsqueeze(dim=-1))
|
| 659 |
-
.sum(dim=1)
|
| 660 |
-
.type(new_x.dtype)
|
| 661 |
-
)
|
| 662 |
-
return final_out
|
| 663 |
|
| 664 |
|
| 665 |
# Copied from transformers.models.llama.modeling_llama.repeat_kv
|
|
@@ -671,17 +420,15 @@ def repeat_kv(hidden_states: torch.Tensor, n_rep: int) -> torch.Tensor:
|
|
| 671 |
batch, num_key_value_heads, slen, head_dim = hidden_states.shape
|
| 672 |
if n_rep == 1:
|
| 673 |
return hidden_states
|
| 674 |
-
hidden_states = hidden_states[:, :, None, :, :].expand(
|
| 675 |
-
batch, num_key_value_heads, n_rep, slen, head_dim
|
| 676 |
-
)
|
| 677 |
return hidden_states.reshape(batch, num_key_value_heads * n_rep, slen, head_dim)
|
| 678 |
|
| 679 |
|
| 680 |
-
# Copied from transformers.models.llama.modeling_llama.LlamaAttention with Llama->
|
| 681 |
-
class
|
| 682 |
"""Multi-headed attention from 'Attention Is All You Need' paper"""
|
| 683 |
|
| 684 |
-
def __init__(self, config:
|
| 685 |
super().__init__()
|
| 686 |
self.config = config
|
| 687 |
self.layer_idx = layer_idx
|
|
@@ -695,63 +442,29 @@ class DeepseekV2Attention(nn.Module):
|
|
| 695 |
self.attention_dropout = config.attention_dropout
|
| 696 |
self.hidden_size = config.hidden_size
|
| 697 |
self.num_heads = config.num_attention_heads
|
| 698 |
-
|
|
|
|
|
|
|
| 699 |
self.max_position_embeddings = config.max_position_embeddings
|
| 700 |
self.rope_theta = config.rope_theta
|
| 701 |
-
self.q_lora_rank = config.q_lora_rank
|
| 702 |
-
self.qk_rope_head_dim = config.qk_rope_head_dim
|
| 703 |
-
self.kv_lora_rank = config.kv_lora_rank
|
| 704 |
-
self.v_head_dim = config.v_head_dim
|
| 705 |
-
self.qk_nope_head_dim = config.qk_nope_head_dim
|
| 706 |
-
self.q_head_dim = config.qk_nope_head_dim + config.qk_rope_head_dim
|
| 707 |
-
|
| 708 |
self.is_causal = True
|
| 709 |
|
| 710 |
-
if self.
|
| 711 |
-
|
| 712 |
-
|
| 713 |
-
|
| 714 |
-
else:
|
| 715 |
-
self.q_a_proj = nn.Linear(
|
| 716 |
-
self.hidden_size, config.q_lora_rank, bias=config.attention_bias
|
| 717 |
-
)
|
| 718 |
-
self.q_a_layernorm = DeepseekV2RMSNorm(config.q_lora_rank)
|
| 719 |
-
self.q_b_proj = nn.Linear(
|
| 720 |
-
config.q_lora_rank, self.num_heads * self.q_head_dim, bias=False
|
| 721 |
)
|
| 722 |
|
| 723 |
-
self.
|
| 724 |
-
|
| 725 |
-
|
| 726 |
-
|
| 727 |
-
)
|
| 728 |
-
self.kv_a_layernorm = DeepseekV2RMSNorm(config.kv_lora_rank)
|
| 729 |
-
self.kv_b_proj = nn.Linear(
|
| 730 |
-
config.kv_lora_rank,
|
| 731 |
-
self.num_heads
|
| 732 |
-
* (self.q_head_dim - self.qk_rope_head_dim + self.v_head_dim),
|
| 733 |
-
bias=False,
|
| 734 |
-
)
|
| 735 |
-
|
| 736 |
-
self.o_proj = nn.Linear(
|
| 737 |
-
self.num_heads * self.v_head_dim,
|
| 738 |
-
self.hidden_size,
|
| 739 |
-
bias=config.attention_bias,
|
| 740 |
-
)
|
| 741 |
self._init_rope()
|
| 742 |
|
| 743 |
-
self.softmax_scale = self.q_head_dim ** (-0.5)
|
| 744 |
-
if self.config.rope_scaling is not None:
|
| 745 |
-
mscale_all_dim = self.config.rope_scaling.get("mscale_all_dim", 0)
|
| 746 |
-
scaling_factor = self.config.rope_scaling["factor"]
|
| 747 |
-
if mscale_all_dim:
|
| 748 |
-
mscale = yarn_get_mscale(scaling_factor, mscale_all_dim)
|
| 749 |
-
self.softmax_scale = self.softmax_scale * mscale * mscale
|
| 750 |
-
|
| 751 |
def _init_rope(self):
|
| 752 |
if self.config.rope_scaling is None:
|
| 753 |
-
self.rotary_emb =
|
| 754 |
-
self.
|
| 755 |
max_position_embeddings=self.max_position_embeddings,
|
| 756 |
base=self.rope_theta,
|
| 757 |
)
|
|
@@ -759,47 +472,24 @@ class DeepseekV2Attention(nn.Module):
|
|
| 759 |
scaling_type = self.config.rope_scaling["type"]
|
| 760 |
scaling_factor = self.config.rope_scaling["factor"]
|
| 761 |
if scaling_type == "linear":
|
| 762 |
-
self.rotary_emb =
|
| 763 |
-
self.
|
| 764 |
max_position_embeddings=self.max_position_embeddings,
|
| 765 |
scaling_factor=scaling_factor,
|
| 766 |
base=self.rope_theta,
|
| 767 |
)
|
| 768 |
elif scaling_type == "dynamic":
|
| 769 |
-
self.rotary_emb =
|
| 770 |
-
self.
|
| 771 |
max_position_embeddings=self.max_position_embeddings,
|
| 772 |
scaling_factor=scaling_factor,
|
| 773 |
base=self.rope_theta,
|
| 774 |
)
|
| 775 |
-
elif scaling_type == "yarn":
|
| 776 |
-
kwargs = {
|
| 777 |
-
key: self.config.rope_scaling[key]
|
| 778 |
-
for key in [
|
| 779 |
-
"original_max_position_embeddings",
|
| 780 |
-
"beta_fast",
|
| 781 |
-
"beta_slow",
|
| 782 |
-
"mscale",
|
| 783 |
-
"mscale_all_dim",
|
| 784 |
-
]
|
| 785 |
-
if key in self.config.rope_scaling
|
| 786 |
-
}
|
| 787 |
-
self.rotary_emb = DeepseekV2YarnRotaryEmbedding(
|
| 788 |
-
self.qk_rope_head_dim,
|
| 789 |
-
max_position_embeddings=self.max_position_embeddings,
|
| 790 |
-
scaling_factor=scaling_factor,
|
| 791 |
-
base=self.rope_theta,
|
| 792 |
-
**kwargs,
|
| 793 |
-
)
|
| 794 |
else:
|
| 795 |
raise ValueError(f"Unknown RoPE scaling type {scaling_type}")
|
| 796 |
|
| 797 |
def _shape(self, tensor: torch.Tensor, seq_len: int, bsz: int):
|
| 798 |
-
return (
|
| 799 |
-
tensor.view(bsz, seq_len, self.num_heads, self.v_head_dim)
|
| 800 |
-
.transpose(1, 2)
|
| 801 |
-
.contiguous()
|
| 802 |
-
)
|
| 803 |
|
| 804 |
def forward(
|
| 805 |
self,
|
|
@@ -815,32 +505,36 @@ class DeepseekV2Attention(nn.Module):
|
|
| 815 |
warnings.warn(
|
| 816 |
"Passing `padding_mask` is deprecated and will be removed in v4.37. Please make sure use `attention_mask` instead.`"
|
| 817 |
)
|
|
|
|
| 818 |
bsz, q_len, _ = hidden_states.size()
|
| 819 |
|
| 820 |
-
if self.
|
| 821 |
-
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 822 |
else:
|
| 823 |
-
|
| 824 |
-
|
| 825 |
-
|
| 826 |
-
q, [self.qk_nope_head_dim, self.qk_rope_head_dim], dim=-1
|
| 827 |
-
)
|
| 828 |
|
| 829 |
-
|
| 830 |
-
|
| 831 |
-
|
| 832 |
-
)
|
| 833 |
-
k_pe = k_pe.view(bsz, q_len, 1, self.qk_rope_head_dim).transpose(1, 2)
|
| 834 |
-
kv = (
|
| 835 |
-
self.kv_b_proj(self.kv_a_layernorm(compressed_kv))
|
| 836 |
-
.view(bsz, q_len, self.num_heads, self.qk_nope_head_dim + self.v_head_dim)
|
| 837 |
-
.transpose(1, 2)
|
| 838 |
-
)
|
| 839 |
|
| 840 |
-
|
| 841 |
-
kv, [self.qk_nope_head_dim, self.v_head_dim], dim=-1
|
| 842 |
-
)
|
| 843 |
-
kv_seq_len = value_states.shape[-2]
|
| 844 |
if past_key_value is not None:
|
| 845 |
if self.layer_idx is None:
|
| 846 |
raise ValueError(
|
|
@@ -850,32 +544,23 @@ class DeepseekV2Attention(nn.Module):
|
|
| 850 |
)
|
| 851 |
kv_seq_len += past_key_value.get_usable_length(kv_seq_len, self.layer_idx)
|
| 852 |
cos, sin = self.rotary_emb(value_states, seq_len=kv_seq_len)
|
|
|
|
| 853 |
|
| 854 |
-
q_pe, k_pe = apply_rotary_pos_emb(q_pe, k_pe, cos, sin, position_ids)
|
| 855 |
-
|
| 856 |
-
query_states = k_pe.new_empty(bsz, self.num_heads, q_len, self.q_head_dim)
|
| 857 |
-
query_states[:, :, :, : self.qk_nope_head_dim] = q_nope
|
| 858 |
-
query_states[:, :, :, self.qk_nope_head_dim :] = q_pe
|
| 859 |
-
|
| 860 |
-
key_states = k_pe.new_empty(bsz, self.num_heads, q_len, self.q_head_dim)
|
| 861 |
-
key_states[:, :, :, : self.qk_nope_head_dim] = k_nope
|
| 862 |
-
key_states[:, :, :, self.qk_nope_head_dim :] = k_pe
|
| 863 |
if past_key_value is not None:
|
| 864 |
cache_kwargs = {"sin": sin, "cos": cos} # Specific to RoPE models
|
| 865 |
-
key_states, value_states = past_key_value.update(
|
| 866 |
-
key_states, value_states, self.layer_idx, cache_kwargs
|
| 867 |
-
)
|
| 868 |
|
| 869 |
-
|
| 870 |
-
|
| 871 |
-
|
|
|
|
| 872 |
|
| 873 |
if attn_weights.size() != (bsz, self.num_heads, q_len, kv_seq_len):
|
| 874 |
raise ValueError(
|
| 875 |
f"Attention weights should be of size {(bsz, self.num_heads, q_len, kv_seq_len)}, but is"
|
| 876 |
f" {attn_weights.size()}"
|
| 877 |
)
|
| 878 |
-
|
| 879 |
if attention_mask is not None:
|
| 880 |
if attention_mask.size() != (bsz, 1, q_len, kv_seq_len):
|
| 881 |
raise ValueError(
|
|
@@ -884,25 +569,26 @@ class DeepseekV2Attention(nn.Module):
|
|
| 884 |
attn_weights = attn_weights + attention_mask
|
| 885 |
|
| 886 |
# upcast attention to fp32
|
| 887 |
-
attn_weights = nn.functional.softmax(
|
| 888 |
-
|
| 889 |
-
).to(query_states.dtype)
|
| 890 |
-
attn_weights = nn.functional.dropout(
|
| 891 |
-
attn_weights, p=self.attention_dropout, training=self.training
|
| 892 |
-
)
|
| 893 |
attn_output = torch.matmul(attn_weights, value_states)
|
| 894 |
|
| 895 |
-
if attn_output.size() != (bsz, self.num_heads, q_len, self.
|
| 896 |
raise ValueError(
|
| 897 |
-
f"`attn_output` should be of size {(bsz, self.num_heads, q_len, self.
|
| 898 |
f" {attn_output.size()}"
|
| 899 |
)
|
| 900 |
|
| 901 |
attn_output = attn_output.transpose(1, 2).contiguous()
|
| 902 |
|
| 903 |
-
attn_output = attn_output.reshape(bsz, q_len, self.
|
| 904 |
|
| 905 |
-
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 906 |
|
| 907 |
if not output_attentions:
|
| 908 |
attn_weights = None
|
|
@@ -910,10 +596,10 @@ class DeepseekV2Attention(nn.Module):
|
|
| 910 |
return attn_output, attn_weights, past_key_value
|
| 911 |
|
| 912 |
|
| 913 |
-
# Copied from transformers.models.llama.modeling_llama.LlamaFlashAttention2 with Llama->
|
| 914 |
-
class
|
| 915 |
"""
|
| 916 |
-
|
| 917 |
untouched. The only required change would be on the forward pass where it needs to correctly call the public API of
|
| 918 |
flash attention and deal with padding tokens in case the input contains any of them.
|
| 919 |
"""
|
|
@@ -936,7 +622,7 @@ class DeepseekV2FlashAttention2(DeepseekV2Attention):
|
|
| 936 |
use_cache: bool = False,
|
| 937 |
**kwargs,
|
| 938 |
) -> Tuple[torch.Tensor, Optional[torch.Tensor], Optional[Tuple[torch.Tensor]]]:
|
| 939 |
-
#
|
| 940 |
if "padding_mask" in kwargs:
|
| 941 |
warnings.warn(
|
| 942 |
"Passing `padding_mask` is deprecated and will be removed in v4.37. Please make sure use `attention_mask` instead.`"
|
|
@@ -949,57 +635,26 @@ class DeepseekV2FlashAttention2(DeepseekV2Attention):
|
|
| 949 |
|
| 950 |
bsz, q_len, _ = hidden_states.size()
|
| 951 |
|
| 952 |
-
|
| 953 |
-
|
| 954 |
-
|
| 955 |
-
q = self.q_b_proj(self.q_a_layernorm(self.q_a_proj(hidden_states)))
|
| 956 |
-
q = q.view(bsz, q_len, self.num_heads, self.q_head_dim).transpose(1, 2)
|
| 957 |
-
q_nope, q_pe = torch.split(
|
| 958 |
-
q, [self.qk_nope_head_dim, self.qk_rope_head_dim], dim=-1
|
| 959 |
-
)
|
| 960 |
|
| 961 |
# Flash attention requires the input to have the shape
|
| 962 |
# batch_size x seq_length x head_dim x hidden_dim
|
| 963 |
# therefore we just need to keep the original shape
|
| 964 |
-
|
| 965 |
-
|
| 966 |
-
|
| 967 |
-
)
|
| 968 |
-
k_pe = k_pe.view(bsz, q_len, 1, self.qk_rope_head_dim).transpose(1, 2)
|
| 969 |
-
kv = (
|
| 970 |
-
self.kv_b_proj(self.kv_a_layernorm(compressed_kv))
|
| 971 |
-
.view(bsz, q_len, self.num_heads, self.qk_nope_head_dim + self.v_head_dim)
|
| 972 |
-
.transpose(1, 2)
|
| 973 |
-
)
|
| 974 |
-
|
| 975 |
-
k_nope, value_states = torch.split(
|
| 976 |
-
kv, [self.qk_nope_head_dim, self.v_head_dim], dim=-1
|
| 977 |
-
)
|
| 978 |
-
kv_seq_len = value_states.shape[-2]
|
| 979 |
|
| 980 |
-
kv_seq_len =
|
| 981 |
if past_key_value is not None:
|
| 982 |
kv_seq_len += past_key_value.get_usable_length(kv_seq_len, self.layer_idx)
|
| 983 |
-
|
| 984 |
cos, sin = self.rotary_emb(value_states, seq_len=kv_seq_len)
|
| 985 |
-
|
| 986 |
-
|
| 987 |
-
query_states = k_pe.new_empty(bsz, self.num_heads, q_len, self.q_head_dim)
|
| 988 |
-
query_states[:, :, :, : self.qk_nope_head_dim] = q_nope
|
| 989 |
-
query_states[:, :, :, self.qk_nope_head_dim :] = q_pe
|
| 990 |
-
|
| 991 |
-
key_states = k_pe.new_empty(bsz, self.num_heads, q_len, self.q_head_dim)
|
| 992 |
-
key_states[:, :, :, : self.qk_nope_head_dim] = k_nope
|
| 993 |
-
key_states[:, :, :, self.qk_nope_head_dim :] = k_pe
|
| 994 |
-
|
| 995 |
-
if self.q_head_dim != self.v_head_dim:
|
| 996 |
-
value_states = F.pad(value_states, [0, self.q_head_dim - self.v_head_dim])
|
| 997 |
|
| 998 |
if past_key_value is not None:
|
| 999 |
cache_kwargs = {"sin": sin, "cos": cos} # Specific to RoPE models
|
| 1000 |
-
key_states, value_states = past_key_value.update(
|
| 1001 |
-
key_states, value_states, self.layer_idx, cache_kwargs
|
| 1002 |
-
)
|
| 1003 |
|
| 1004 |
# TODO: These transpose are quite inefficient but Flash Attention requires the layout [batch_size, sequence_length, num_heads, head_dim]. We would need to refactor the KV cache
|
| 1005 |
# to be able to avoid many of these transpose/reshape/view.
|
|
@@ -1013,7 +668,7 @@ class DeepseekV2FlashAttention2(DeepseekV2Attention):
|
|
| 1013 |
# therefore the input hidden states gets silently casted in float32. Hence, we need
|
| 1014 |
# cast them back in the correct dtype just to be sure everything works as expected.
|
| 1015 |
# This might slowdown training & inference so it is recommended to not cast the LayerNorms
|
| 1016 |
-
# in fp32. (
|
| 1017 |
|
| 1018 |
input_dtype = query_states.dtype
|
| 1019 |
if input_dtype == torch.float32:
|
|
@@ -1023,7 +678,7 @@ class DeepseekV2FlashAttention2(DeepseekV2Attention):
|
|
| 1023 |
elif torch.is_autocast_enabled():
|
| 1024 |
target_dtype = torch.get_autocast_gpu_dtype()
|
| 1025 |
else:
|
| 1026 |
-
target_dtype = self.q_proj.weight.dtype
|
| 1027 |
|
| 1028 |
logger.warning_once(
|
| 1029 |
f"The input hidden states seems to be silently casted in float32, this might be related to"
|
|
@@ -1036,20 +691,10 @@ class DeepseekV2FlashAttention2(DeepseekV2Attention):
|
|
| 1036 |
value_states = value_states.to(target_dtype)
|
| 1037 |
|
| 1038 |
attn_output = self._flash_attention_forward(
|
| 1039 |
-
query_states,
|
| 1040 |
-
key_states,
|
| 1041 |
-
value_states,
|
| 1042 |
-
attention_mask,
|
| 1043 |
-
q_len,
|
| 1044 |
-
dropout=dropout_rate,
|
| 1045 |
-
softmax_scale=self.softmax_scale,
|
| 1046 |
)
|
| 1047 |
-
if self.q_head_dim != self.v_head_dim:
|
| 1048 |
-
attn_output = attn_output[:, :, :, : self.v_head_dim]
|
| 1049 |
|
| 1050 |
-
attn_output = attn_output.reshape(
|
| 1051 |
-
bsz, q_len, self.num_heads * self.v_head_dim
|
| 1052 |
-
).contiguous()
|
| 1053 |
attn_output = self.o_proj(attn_output)
|
| 1054 |
|
| 1055 |
if not output_attentions:
|
|
@@ -1058,14 +703,7 @@ class DeepseekV2FlashAttention2(DeepseekV2Attention):
|
|
| 1058 |
return attn_output, attn_weights, past_key_value
|
| 1059 |
|
| 1060 |
def _flash_attention_forward(
|
| 1061 |
-
self,
|
| 1062 |
-
query_states,
|
| 1063 |
-
key_states,
|
| 1064 |
-
value_states,
|
| 1065 |
-
attention_mask,
|
| 1066 |
-
query_length,
|
| 1067 |
-
dropout=0.0,
|
| 1068 |
-
softmax_scale=None,
|
| 1069 |
):
|
| 1070 |
"""
|
| 1071 |
Calls the forward method of Flash Attention - if the input hidden states contain at least one padding token
|
|
@@ -1089,20 +727,13 @@ class DeepseekV2FlashAttention2(DeepseekV2Attention):
|
|
| 1089 |
if not self._flash_attn_uses_top_left_mask:
|
| 1090 |
causal = self.is_causal
|
| 1091 |
else:
|
| 1092 |
-
# TODO: Remove the `query_length != 1` check once Flash Attention for RoCm is bumped to 2.1. For details, please see the comment in
|
| 1093 |
causal = self.is_causal and query_length != 1
|
| 1094 |
|
| 1095 |
# Contains at least one padding token in the sequence
|
| 1096 |
if attention_mask is not None:
|
| 1097 |
batch_size = query_states.shape[0]
|
| 1098 |
-
(
|
| 1099 |
-
query_states,
|
| 1100 |
-
key_states,
|
| 1101 |
-
value_states,
|
| 1102 |
-
indices_q,
|
| 1103 |
-
cu_seq_lens,
|
| 1104 |
-
max_seq_lens,
|
| 1105 |
-
) = self._upad_input(
|
| 1106 |
query_states, key_states, value_states, attention_mask, query_length
|
| 1107 |
)
|
| 1108 |
|
|
@@ -1122,39 +753,27 @@ class DeepseekV2FlashAttention2(DeepseekV2Attention):
|
|
| 1122 |
causal=causal,
|
| 1123 |
)
|
| 1124 |
|
| 1125 |
-
attn_output = pad_input(
|
| 1126 |
-
attn_output_unpad, indices_q, batch_size, query_length
|
| 1127 |
-
)
|
| 1128 |
else:
|
| 1129 |
attn_output = flash_attn_func(
|
| 1130 |
-
query_states,
|
| 1131 |
-
key_states,
|
| 1132 |
-
value_states,
|
| 1133 |
-
dropout,
|
| 1134 |
-
softmax_scale=softmax_scale,
|
| 1135 |
-
causal=causal,
|
| 1136 |
)
|
| 1137 |
|
| 1138 |
return attn_output
|
| 1139 |
|
| 1140 |
-
def _upad_input(
|
| 1141 |
-
self, query_layer, key_layer, value_layer, attention_mask, query_length
|
| 1142 |
-
):
|
| 1143 |
indices_k, cu_seqlens_k, max_seqlen_in_batch_k = _get_unpad_data(attention_mask)
|
| 1144 |
batch_size, kv_seq_len, num_key_value_heads, head_dim = key_layer.shape
|
| 1145 |
|
| 1146 |
key_layer = index_first_axis(
|
| 1147 |
-
key_layer.reshape(batch_size * kv_seq_len, num_key_value_heads, head_dim),
|
| 1148 |
-
indices_k,
|
| 1149 |
)
|
| 1150 |
value_layer = index_first_axis(
|
| 1151 |
-
value_layer.reshape(batch_size * kv_seq_len, num_key_value_heads, head_dim),
|
| 1152 |
-
indices_k,
|
| 1153 |
)
|
| 1154 |
if query_length == kv_seq_len:
|
| 1155 |
query_layer = index_first_axis(
|
| 1156 |
-
query_layer.reshape(batch_size * kv_seq_len, self.num_heads, head_dim),
|
| 1157 |
-
indices_k,
|
| 1158 |
)
|
| 1159 |
cu_seqlens_q = cu_seqlens_k
|
| 1160 |
max_seqlen_in_batch_q = max_seqlen_in_batch_k
|
|
@@ -1169,9 +788,7 @@ class DeepseekV2FlashAttention2(DeepseekV2Attention):
|
|
| 1169 |
else:
|
| 1170 |
# The -q_len: slice assumes left padding.
|
| 1171 |
attention_mask = attention_mask[:, -query_length:]
|
| 1172 |
-
query_layer, indices_q, cu_seqlens_q, max_seqlen_in_batch_q = unpad_input(
|
| 1173 |
-
query_layer, attention_mask
|
| 1174 |
-
)
|
| 1175 |
|
| 1176 |
return (
|
| 1177 |
query_layer,
|
|
@@ -1183,36 +800,113 @@ class DeepseekV2FlashAttention2(DeepseekV2Attention):
|
|
| 1183 |
)
|
| 1184 |
|
| 1185 |
|
| 1186 |
-
|
| 1187 |
-
|
| 1188 |
-
"
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
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|
| 1189 |
}
|
| 1190 |
|
| 1191 |
|
| 1192 |
-
class
|
| 1193 |
-
def __init__(self, config:
|
| 1194 |
super().__init__()
|
| 1195 |
self.hidden_size = config.hidden_size
|
| 1196 |
|
| 1197 |
-
self.self_attn =
|
| 1198 |
-
config=config, layer_idx=layer_idx
|
| 1199 |
-
)
|
| 1200 |
|
| 1201 |
-
self.mlp = (
|
| 1202 |
-
|
| 1203 |
-
|
| 1204 |
-
|
| 1205 |
-
|
| 1206 |
-
and layer_idx % config.moe_layer_freq == 0
|
| 1207 |
-
)
|
| 1208 |
-
else DeepseekV2MLP(config)
|
| 1209 |
-
)
|
| 1210 |
-
self.input_layernorm = DeepseekV2RMSNorm(
|
| 1211 |
-
config.hidden_size, eps=config.rms_norm_eps
|
| 1212 |
-
)
|
| 1213 |
-
self.post_attention_layernorm = DeepseekV2RMSNorm(
|
| 1214 |
-
config.hidden_size, eps=config.rms_norm_eps
|
| 1215 |
-
)
|
| 1216 |
|
| 1217 |
def forward(
|
| 1218 |
self,
|
|
@@ -1223,9 +917,7 @@ class DeepseekV2DecoderLayer(nn.Module):
|
|
| 1223 |
output_attentions: Optional[bool] = False,
|
| 1224 |
use_cache: Optional[bool] = False,
|
| 1225 |
**kwargs,
|
| 1226 |
-
) -> Tuple[
|
| 1227 |
-
torch.FloatTensor, Optional[Tuple[torch.FloatTensor, torch.FloatTensor]]
|
| 1228 |
-
]:
|
| 1229 |
"""
|
| 1230 |
Args:
|
| 1231 |
hidden_states (`torch.FloatTensor`): input to the layer of shape `(batch, seq_len, embed_dim)`
|
|
@@ -1277,7 +969,7 @@ class DeepseekV2DecoderLayer(nn.Module):
|
|
| 1277 |
return outputs
|
| 1278 |
|
| 1279 |
|
| 1280 |
-
|
| 1281 |
This model inherits from [`PreTrainedModel`]. Check the superclass documentation for the generic methods the
|
| 1282 |
library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads
|
| 1283 |
etc.)
|
|
@@ -1287,7 +979,7 @@ DeepseekV2_START_DOCSTRING = r"""
|
|
| 1287 |
and behavior.
|
| 1288 |
|
| 1289 |
Parameters:
|
| 1290 |
-
config ([`
|
| 1291 |
Model configuration class with all the parameters of the model. Initializing with a config file does not
|
| 1292 |
load the weights associated with the model, only the configuration. Check out the
|
| 1293 |
[`~PreTrainedModel.from_pretrained`] method to load the model weights.
|
|
@@ -1295,16 +987,17 @@ DeepseekV2_START_DOCSTRING = r"""
|
|
| 1295 |
|
| 1296 |
|
| 1297 |
@add_start_docstrings(
|
| 1298 |
-
"The bare
|
| 1299 |
-
|
| 1300 |
)
|
| 1301 |
-
class
|
| 1302 |
-
config_class =
|
| 1303 |
base_model_prefix = "model"
|
| 1304 |
supports_gradient_checkpointing = True
|
| 1305 |
-
_no_split_modules = ["
|
| 1306 |
_skip_keys_device_placement = "past_key_values"
|
| 1307 |
_supports_flash_attn_2 = True
|
|
|
|
| 1308 |
_supports_cache_class = True
|
| 1309 |
|
| 1310 |
def _init_weights(self, module):
|
|
@@ -1319,7 +1012,7 @@ class DeepseekV2PreTrainedModel(PreTrainedModel):
|
|
| 1319 |
module.weight.data[module.padding_idx].zero_()
|
| 1320 |
|
| 1321 |
|
| 1322 |
-
|
| 1323 |
Args:
|
| 1324 |
input_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`):
|
| 1325 |
Indices of input sequence tokens in the vocabulary. Padding will be ignored by default should you provide
|
|
@@ -1390,33 +1083,29 @@ DeepseekV2_INPUTS_DOCSTRING = r"""
|
|
| 1390 |
|
| 1391 |
|
| 1392 |
@add_start_docstrings(
|
| 1393 |
-
"The bare
|
| 1394 |
-
|
| 1395 |
)
|
| 1396 |
-
class
|
| 1397 |
"""
|
| 1398 |
-
Transformer decoder consisting of *config.num_hidden_layers* layers. Each layer is a [`
|
| 1399 |
|
| 1400 |
Args:
|
| 1401 |
-
config:
|
| 1402 |
"""
|
| 1403 |
|
| 1404 |
-
def __init__(self, config:
|
| 1405 |
super().__init__(config)
|
| 1406 |
self.padding_idx = config.pad_token_id
|
| 1407 |
self.vocab_size = config.vocab_size
|
| 1408 |
|
| 1409 |
-
self.embed_tokens = nn.Embedding(
|
| 1410 |
-
config.vocab_size, config.hidden_size, self.padding_idx
|
| 1411 |
-
)
|
| 1412 |
self.layers = nn.ModuleList(
|
| 1413 |
-
[
|
| 1414 |
-
DeepseekV2DecoderLayer(config, layer_idx)
|
| 1415 |
-
for layer_idx in range(config.num_hidden_layers)
|
| 1416 |
-
]
|
| 1417 |
)
|
|
|
|
| 1418 |
self._use_flash_attention_2 = config._attn_implementation == "flash_attention_2"
|
| 1419 |
-
self.norm =
|
| 1420 |
|
| 1421 |
self.gradient_checkpointing = False
|
| 1422 |
# Initialize weights and apply final processing
|
|
@@ -1428,7 +1117,7 @@ class DeepseekV2Model(DeepseekV2PreTrainedModel):
|
|
| 1428 |
def set_input_embeddings(self, value):
|
| 1429 |
self.embed_tokens = value
|
| 1430 |
|
| 1431 |
-
@add_start_docstrings_to_model_forward(
|
| 1432 |
def forward(
|
| 1433 |
self,
|
| 1434 |
input_ids: torch.LongTensor = None,
|
|
@@ -1441,27 +1130,17 @@ class DeepseekV2Model(DeepseekV2PreTrainedModel):
|
|
| 1441 |
output_hidden_states: Optional[bool] = None,
|
| 1442 |
return_dict: Optional[bool] = None,
|
| 1443 |
) -> Union[Tuple, BaseModelOutputWithPast]:
|
| 1444 |
-
output_attentions =
|
| 1445 |
-
output_attentions
|
| 1446 |
-
if output_attentions is not None
|
| 1447 |
-
else self.config.output_attentions
|
| 1448 |
-
)
|
| 1449 |
output_hidden_states = (
|
| 1450 |
-
output_hidden_states
|
| 1451 |
-
if output_hidden_states is not None
|
| 1452 |
-
else self.config.output_hidden_states
|
| 1453 |
)
|
| 1454 |
use_cache = use_cache if use_cache is not None else self.config.use_cache
|
| 1455 |
|
| 1456 |
-
return_dict =
|
| 1457 |
-
return_dict if return_dict is not None else self.config.use_return_dict
|
| 1458 |
-
)
|
| 1459 |
|
| 1460 |
# retrieve input_ids and inputs_embeds
|
| 1461 |
if input_ids is not None and inputs_embeds is not None:
|
| 1462 |
-
raise ValueError(
|
| 1463 |
-
"You cannot specify both input_ids and inputs_embeds at the same time"
|
| 1464 |
-
)
|
| 1465 |
elif input_ids is not None:
|
| 1466 |
batch_size, seq_length = input_ids.shape[:2]
|
| 1467 |
elif inputs_embeds is not None:
|
|
@@ -1486,10 +1165,7 @@ class DeepseekV2Model(DeepseekV2PreTrainedModel):
|
|
| 1486 |
if position_ids is None:
|
| 1487 |
device = input_ids.device if input_ids is not None else inputs_embeds.device
|
| 1488 |
position_ids = torch.arange(
|
| 1489 |
-
past_key_values_length,
|
| 1490 |
-
seq_length + past_key_values_length,
|
| 1491 |
-
dtype=torch.long,
|
| 1492 |
-
device=device,
|
| 1493 |
)
|
| 1494 |
position_ids = position_ids.unsqueeze(0)
|
| 1495 |
|
|
@@ -1498,19 +1174,21 @@ class DeepseekV2Model(DeepseekV2PreTrainedModel):
|
|
| 1498 |
|
| 1499 |
if self._use_flash_attention_2:
|
| 1500 |
# 2d mask is passed through the layers
|
| 1501 |
-
attention_mask = (
|
| 1502 |
-
|
| 1503 |
-
|
| 1504 |
-
|
| 1505 |
-
|
| 1506 |
-
else:
|
| 1507 |
-
# 4d mask is passed through the layers
|
| 1508 |
-
attention_mask = _prepare_4d_causal_attention_mask(
|
| 1509 |
attention_mask,
|
| 1510 |
(batch_size, seq_length),
|
| 1511 |
inputs_embeds,
|
| 1512 |
past_key_values_length,
|
| 1513 |
)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1514 |
|
| 1515 |
# embed positions
|
| 1516 |
hidden_states = inputs_embeds
|
|
@@ -1560,17 +1238,9 @@ class DeepseekV2Model(DeepseekV2PreTrainedModel):
|
|
| 1560 |
|
| 1561 |
next_cache = None
|
| 1562 |
if use_cache:
|
| 1563 |
-
next_cache = (
|
| 1564 |
-
next_decoder_cache.to_legacy_cache()
|
| 1565 |
-
if use_legacy_cache
|
| 1566 |
-
else next_decoder_cache
|
| 1567 |
-
)
|
| 1568 |
if not return_dict:
|
| 1569 |
-
return tuple(
|
| 1570 |
-
v
|
| 1571 |
-
for v in [hidden_states, next_cache, all_hidden_states, all_self_attns]
|
| 1572 |
-
if v is not None
|
| 1573 |
-
)
|
| 1574 |
return BaseModelOutputWithPast(
|
| 1575 |
last_hidden_state=hidden_states,
|
| 1576 |
past_key_values=next_cache,
|
|
@@ -1579,12 +1249,12 @@ class DeepseekV2Model(DeepseekV2PreTrainedModel):
|
|
| 1579 |
)
|
| 1580 |
|
| 1581 |
|
| 1582 |
-
class
|
| 1583 |
_tied_weights_keys = ["lm_head.weight"]
|
| 1584 |
|
| 1585 |
def __init__(self, config):
|
| 1586 |
super().__init__(config)
|
| 1587 |
-
self.model =
|
| 1588 |
self.vocab_size = config.vocab_size
|
| 1589 |
self.lm_head = nn.Linear(config.hidden_size, config.vocab_size, bias=False)
|
| 1590 |
|
|
@@ -1609,10 +1279,8 @@ class DeepseekV2ForCausalLM(DeepseekV2PreTrainedModel):
|
|
| 1609 |
def get_decoder(self):
|
| 1610 |
return self.model
|
| 1611 |
|
| 1612 |
-
@add_start_docstrings_to_model_forward(
|
| 1613 |
-
@replace_return_docstrings(
|
| 1614 |
-
output_type=CausalLMOutputWithPast, config_class=_CONFIG_FOR_DOC
|
| 1615 |
-
)
|
| 1616 |
def forward(
|
| 1617 |
self,
|
| 1618 |
input_ids: torch.LongTensor = None,
|
|
@@ -1638,9 +1306,9 @@ class DeepseekV2ForCausalLM(DeepseekV2PreTrainedModel):
|
|
| 1638 |
Example:
|
| 1639 |
|
| 1640 |
```python
|
| 1641 |
-
>>> from transformers import AutoTokenizer,
|
| 1642 |
|
| 1643 |
-
>>> model =
|
| 1644 |
>>> tokenizer = AutoTokenizer.from_pretrained(PATH_TO_CONVERTED_TOKENIZER)
|
| 1645 |
|
| 1646 |
>>> prompt = "Hey, are you conscious? Can you talk to me?"
|
|
@@ -1651,19 +1319,11 @@ class DeepseekV2ForCausalLM(DeepseekV2PreTrainedModel):
|
|
| 1651 |
>>> tokenizer.batch_decode(generate_ids, skip_special_tokens=True, clean_up_tokenization_spaces=False)[0]
|
| 1652 |
"Hey, are you conscious? Can you talk to me?\nI'm not conscious, but I can talk to you."
|
| 1653 |
```"""
|
| 1654 |
-
output_attentions =
|
| 1655 |
-
output_attentions
|
| 1656 |
-
if output_attentions is not None
|
| 1657 |
-
else self.config.output_attentions
|
| 1658 |
-
)
|
| 1659 |
output_hidden_states = (
|
| 1660 |
-
output_hidden_states
|
| 1661 |
-
if output_hidden_states is not None
|
| 1662 |
-
else self.config.output_hidden_states
|
| 1663 |
-
)
|
| 1664 |
-
return_dict = (
|
| 1665 |
-
return_dict if return_dict is not None else self.config.use_return_dict
|
| 1666 |
)
|
|
|
|
| 1667 |
|
| 1668 |
# decoder outputs consists of (dec_features, layer_state, dec_hidden, dec_attn)
|
| 1669 |
outputs = self.model(
|
|
@@ -1679,7 +1339,12 @@ class DeepseekV2ForCausalLM(DeepseekV2PreTrainedModel):
|
|
| 1679 |
)
|
| 1680 |
|
| 1681 |
hidden_states = outputs[0]
|
| 1682 |
-
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1683 |
logits = logits.float()
|
| 1684 |
|
| 1685 |
loss = None
|
|
@@ -1708,12 +1373,7 @@ class DeepseekV2ForCausalLM(DeepseekV2PreTrainedModel):
|
|
| 1708 |
)
|
| 1709 |
|
| 1710 |
def prepare_inputs_for_generation(
|
| 1711 |
-
self,
|
| 1712 |
-
input_ids,
|
| 1713 |
-
past_key_values=None,
|
| 1714 |
-
attention_mask=None,
|
| 1715 |
-
inputs_embeds=None,
|
| 1716 |
-
**kwargs,
|
| 1717 |
):
|
| 1718 |
if past_key_values is not None:
|
| 1719 |
if isinstance(past_key_values, Cache):
|
|
@@ -1728,10 +1388,7 @@ class DeepseekV2ForCausalLM(DeepseekV2PreTrainedModel):
|
|
| 1728 |
# 1 - If the length of the attention_mask exceeds the length of input_ids, then we are in a setting where
|
| 1729 |
# some of the inputs are exclusivelly passed as part of the cache (e.g. when passing input_embeds as
|
| 1730 |
# input)
|
| 1731 |
-
if
|
| 1732 |
-
attention_mask is not None
|
| 1733 |
-
and attention_mask.shape[1] > input_ids.shape[1]
|
| 1734 |
-
):
|
| 1735 |
input_ids = input_ids[:, -(attention_mask.shape[1] - past_length) :]
|
| 1736 |
# 2 - If the past_length is smaller than input_ids', then input_ids holds all input tokens. We can discard
|
| 1737 |
# input_ids based on the past_length.
|
|
@@ -1776,19 +1433,16 @@ class DeepseekV2ForCausalLM(DeepseekV2PreTrainedModel):
|
|
| 1776 |
reordered_past = ()
|
| 1777 |
for layer_past in past_key_values:
|
| 1778 |
reordered_past += (
|
| 1779 |
-
tuple(
|
| 1780 |
-
past_state.index_select(0, beam_idx.to(past_state.device))
|
| 1781 |
-
for past_state in layer_past
|
| 1782 |
-
),
|
| 1783 |
)
|
| 1784 |
return reordered_past
|
| 1785 |
|
| 1786 |
|
| 1787 |
@add_start_docstrings(
|
| 1788 |
"""
|
| 1789 |
-
The
|
| 1790 |
|
| 1791 |
-
[`
|
| 1792 |
(e.g. GPT-2) do.
|
| 1793 |
|
| 1794 |
Since it does classification on the last token, it requires to know the position of the last token. If a
|
|
@@ -1797,13 +1451,13 @@ class DeepseekV2ForCausalLM(DeepseekV2PreTrainedModel):
|
|
| 1797 |
padding tokens when `inputs_embeds` are passed instead of `input_ids`, it does the same (take the last value in
|
| 1798 |
each row of the batch).
|
| 1799 |
""",
|
| 1800 |
-
|
| 1801 |
)
|
| 1802 |
-
class
|
| 1803 |
def __init__(self, config):
|
| 1804 |
super().__init__(config)
|
| 1805 |
self.num_labels = config.num_labels
|
| 1806 |
-
self.model =
|
| 1807 |
self.score = nn.Linear(config.hidden_size, self.num_labels, bias=False)
|
| 1808 |
|
| 1809 |
# Initialize weights and apply final processing
|
|
@@ -1815,7 +1469,7 @@ class DeepseekV2ForSequenceClassification(DeepseekV2PreTrainedModel):
|
|
| 1815 |
def set_input_embeddings(self, value):
|
| 1816 |
self.model.embed_tokens = value
|
| 1817 |
|
| 1818 |
-
@add_start_docstrings_to_model_forward(
|
| 1819 |
def forward(
|
| 1820 |
self,
|
| 1821 |
input_ids: torch.LongTensor = None,
|
|
@@ -1835,9 +1489,7 @@ class DeepseekV2ForSequenceClassification(DeepseekV2PreTrainedModel):
|
|
| 1835 |
config.num_labels - 1]`. If `config.num_labels == 1` a regression loss is computed (Mean-Square loss), If
|
| 1836 |
`config.num_labels > 1` a classification loss is computed (Cross-Entropy).
|
| 1837 |
"""
|
| 1838 |
-
return_dict =
|
| 1839 |
-
return_dict if return_dict is not None else self.config.use_return_dict
|
| 1840 |
-
)
|
| 1841 |
|
| 1842 |
transformer_outputs = self.model(
|
| 1843 |
input_ids,
|
|
@@ -1859,22 +1511,18 @@ class DeepseekV2ForSequenceClassification(DeepseekV2PreTrainedModel):
|
|
| 1859 |
batch_size = inputs_embeds.shape[0]
|
| 1860 |
|
| 1861 |
if self.config.pad_token_id is None and batch_size != 1:
|
| 1862 |
-
raise ValueError(
|
| 1863 |
-
"Cannot handle batch sizes > 1 if no padding token is defined."
|
| 1864 |
-
)
|
| 1865 |
if self.config.pad_token_id is None:
|
| 1866 |
sequence_lengths = -1
|
| 1867 |
else:
|
| 1868 |
if input_ids is not None:
|
| 1869 |
-
sequence_lengths = (
|
| 1870 |
-
|
| 1871 |
-
)
|
| 1872 |
else:
|
| 1873 |
sequence_lengths = -1
|
| 1874 |
|
| 1875 |
-
pooled_logits = logits[
|
| 1876 |
-
torch.arange(batch_size, device=logits.device), sequence_lengths
|
| 1877 |
-
]
|
| 1878 |
|
| 1879 |
loss = None
|
| 1880 |
if labels is not None:
|
|
@@ -1882,9 +1530,7 @@ class DeepseekV2ForSequenceClassification(DeepseekV2PreTrainedModel):
|
|
| 1882 |
if self.config.problem_type is None:
|
| 1883 |
if self.num_labels == 1:
|
| 1884 |
self.config.problem_type = "regression"
|
| 1885 |
-
elif self.num_labels > 1 and (
|
| 1886 |
-
labels.dtype == torch.long or labels.dtype == torch.int
|
| 1887 |
-
):
|
| 1888 |
self.config.problem_type = "single_label_classification"
|
| 1889 |
else:
|
| 1890 |
self.config.problem_type = "multi_label_classification"
|
|
@@ -1897,9 +1543,7 @@ class DeepseekV2ForSequenceClassification(DeepseekV2PreTrainedModel):
|
|
| 1897 |
loss = loss_fct(pooled_logits, labels)
|
| 1898 |
elif self.config.problem_type == "single_label_classification":
|
| 1899 |
loss_fct = CrossEntropyLoss()
|
| 1900 |
-
loss = loss_fct(
|
| 1901 |
-
pooled_logits.view(-1, self.num_labels), labels.view(-1)
|
| 1902 |
-
)
|
| 1903 |
elif self.config.problem_type == "multi_label_classification":
|
| 1904 |
loss_fct = BCEWithLogitsLoss()
|
| 1905 |
loss = loss_fct(pooled_logits, labels)
|
|
@@ -1913,4 +1557,4 @@ class DeepseekV2ForSequenceClassification(DeepseekV2PreTrainedModel):
|
|
| 1913 |
past_key_values=transformer_outputs.past_key_values,
|
| 1914 |
hidden_states=transformer_outputs.hidden_states,
|
| 1915 |
attentions=transformer_outputs.attentions,
|
| 1916 |
-
)
|
|
|
|
| 5 |
# and OPT implementations in this library. It has been modified from its
|
| 6 |
# original forms to accommodate minor architectural differences compared
|
| 7 |
# to GPT-NeoX and OPT used by the Meta AI team that trained the model.
|
| 8 |
+
#
|
| 9 |
# Licensed under the Apache License, Version 2.0 (the "License");
|
| 10 |
# you may not use this file except in compliance with the License.
|
| 11 |
# You may obtain a copy of the License at
|
|
|
|
| 34 |
AttentionMaskConverter,
|
| 35 |
_prepare_4d_attention_mask,
|
| 36 |
_prepare_4d_causal_attention_mask,
|
| 37 |
+
_prepare_4d_causal_attention_mask_for_sdpa,
|
| 38 |
)
|
| 39 |
+
from transformers.modeling_outputs import BaseModelOutputWithPast, CausalLMOutputWithPast, SequenceClassifierOutputWithPast
|
|
|
|
|
|
|
|
|
|
|
|
|
| 40 |
from transformers.modeling_utils import PreTrainedModel
|
| 41 |
+
from transformers.pytorch_utils import ALL_LAYERNORM_LAYERS, is_torch_greater_or_equal_than_1_13
|
|
|
|
|
|
|
|
|
|
| 42 |
from transformers.utils import (
|
| 43 |
add_start_docstrings,
|
| 44 |
add_start_docstrings_to_model_forward,
|
|
|
|
| 48 |
replace_return_docstrings,
|
| 49 |
)
|
| 50 |
from transformers.utils.import_utils import is_torch_fx_available
|
| 51 |
+
from .configuration_deepseek import DeepseekConfig
|
| 52 |
+
|
|
|
|
| 53 |
|
| 54 |
if is_flash_attn_2_available():
|
| 55 |
from flash_attn import flash_attn_func, flash_attn_varlen_func
|
|
|
|
| 67 |
|
| 68 |
logger = logging.get_logger(__name__)
|
| 69 |
|
| 70 |
+
_CONFIG_FOR_DOC = "DeepseekConfig"
|
| 71 |
|
| 72 |
|
| 73 |
def _get_unpad_data(attention_mask):
|
| 74 |
seqlens_in_batch = attention_mask.sum(dim=-1, dtype=torch.int32)
|
| 75 |
indices = torch.nonzero(attention_mask.flatten(), as_tuple=False).flatten()
|
| 76 |
max_seqlen_in_batch = seqlens_in_batch.max().item()
|
| 77 |
+
cu_seqlens = F.pad(torch.cumsum(seqlens_in_batch, dim=0, dtype=torch.torch.int32), (1, 0))
|
|
|
|
|
|
|
| 78 |
return (
|
| 79 |
indices,
|
| 80 |
cu_seqlens,
|
|
|
|
| 82 |
)
|
| 83 |
|
| 84 |
|
| 85 |
+
def _expand_mask(mask: torch.Tensor, dtype: torch.dtype, tgt_len: Optional[int] = None):
|
| 86 |
+
warnings.warn(
|
| 87 |
+
"Calling `transformers.models.Deepseek.modeling_Deepseek._prepare_4d_attention_mask` is deprecated and will be removed in v4.37. Use `transformers.modeling_attn_mask_utils._prepare_4d_attention_mask"
|
| 88 |
+
)
|
| 89 |
+
return _prepare_4d_attention_mask(mask=mask, dtype=dtype, tgt_len=tgt_len)
|
| 90 |
+
|
| 91 |
+
|
| 92 |
+
def _make_causal_mask(
|
| 93 |
+
input_ids_shape: torch.Size, dtype: torch.dtype, device: torch.device, past_key_values_length: int = 0
|
| 94 |
+
):
|
| 95 |
+
warnings.warn(
|
| 96 |
+
"Calling `transformers.models.Deepseek.modeling_Deepseek._make_causal_mask` is deprecated and will be removed in v4.37. Use `transformers.models.Deepseek.modeling_Deepseek.AttentionMaskConverter._make_causal_mask"
|
| 97 |
+
)
|
| 98 |
+
return AttentionMaskConverter._make_causal_mask(
|
| 99 |
+
input_ids_shape=input_ids_shape, dtype=dtype, device=device, past_key_values_length=past_key_values_length
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| 100 |
+
)
|
| 101 |
+
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| 102 |
+
|
| 103 |
+
class DeepseekRMSNorm(nn.Module):
|
| 104 |
def __init__(self, hidden_size, eps=1e-6):
|
| 105 |
"""
|
| 106 |
+
DeepseekRMSNorm is equivalent to T5LayerNorm
|
| 107 |
"""
|
| 108 |
super().__init__()
|
| 109 |
self.weight = nn.Parameter(torch.ones(hidden_size))
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| 117 |
return self.weight * hidden_states.to(input_dtype)
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| 120 |
+
ALL_LAYERNORM_LAYERS.append(DeepseekRMSNorm)
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| 122 |
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| 123 |
+
class DeepseekRotaryEmbedding(nn.Module):
|
| 124 |
def __init__(self, dim, max_position_embeddings=2048, base=10000, device=None):
|
| 125 |
super().__init__()
|
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| 127 |
self.dim = dim
|
| 128 |
self.max_position_embeddings = max_position_embeddings
|
| 129 |
self.base = base
|
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+
inv_freq = 1.0 / (self.base ** (torch.arange(0, self.dim, 2).float().to(device) / self.dim))
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| 131 |
self.register_buffer("inv_freq", inv_freq, persistent=False)
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| 133 |
# Build here to make `torch.jit.trace` work.
|
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self._set_cos_sin_cache(
|
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+
seq_len=max_position_embeddings, device=self.inv_freq.device, dtype=torch.get_default_dtype()
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| 136 |
)
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self.max_seq_len_cached = None
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| 139 |
+
|
| 140 |
def _set_cos_sin_cache(self, seq_len, device, dtype):
|
| 141 |
self.max_seq_len_cached = seq_len
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+
t = torch.arange(self.max_seq_len_cached, device=device, dtype=self.inv_freq.dtype)
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| 143 |
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| 144 |
freqs = torch.outer(t, self.inv_freq.to(t.device))
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# Different from paper, but it uses a different permutation in order to obtain the same calculation
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| 158 |
)
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| 161 |
+
# Copied from transformers.models.llama.modeling_llama.LlamaLinearScalingRotaryEmbedding with Llama->Deepseek
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| 162 |
+
class DeepseekLinearScalingRotaryEmbedding(DeepseekRotaryEmbedding):
|
| 163 |
+
"""DeepseekRotaryEmbedding extended with linear scaling. Credits to the Reddit user /u/kaiokendev"""
|
| 164 |
|
| 165 |
+
def __init__(self, dim, max_position_embeddings=2048, base=10000, device=None, scaling_factor=1.0):
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| 166 |
self.scaling_factor = scaling_factor
|
| 167 |
super().__init__(dim, max_position_embeddings, base, device)
|
| 168 |
|
| 169 |
def _set_cos_sin_cache(self, seq_len, device, dtype):
|
| 170 |
self.max_seq_len_cached = seq_len
|
| 171 |
+
t = torch.arange(self.max_seq_len_cached, device=device, dtype=self.inv_freq.dtype)
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| 172 |
t = t / self.scaling_factor
|
| 173 |
|
| 174 |
freqs = torch.outer(t, self.inv_freq)
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|
| 178 |
self.register_buffer("sin_cached", emb.sin().to(dtype), persistent=False)
|
| 179 |
|
| 180 |
|
| 181 |
+
# Copied from transformers.models.llama.modeling_llama.LlamaDynamicNTKScalingRotaryEmbedding with Llama->Deepseek
|
| 182 |
+
class DeepseekDynamicNTKScalingRotaryEmbedding(DeepseekRotaryEmbedding):
|
| 183 |
+
"""DeepseekRotaryEmbedding extended with Dynamic NTK scaling. Credits to the Reddit users /u/bloc97 and /u/emozilla"""
|
| 184 |
|
| 185 |
+
def __init__(self, dim, max_position_embeddings=2048, base=10000, device=None, scaling_factor=1.0):
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| 186 |
self.scaling_factor = scaling_factor
|
| 187 |
super().__init__(dim, max_position_embeddings, base, device)
|
| 188 |
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|
| 191 |
|
| 192 |
if seq_len > self.max_position_embeddings:
|
| 193 |
base = self.base * (
|
| 194 |
+
(self.scaling_factor * seq_len / self.max_position_embeddings) - (self.scaling_factor - 1)
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|
| 195 |
) ** (self.dim / (self.dim - 2))
|
| 196 |
+
inv_freq = 1.0 / (base ** (torch.arange(0, self.dim, 2).float().to(device) / self.dim))
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|
| 197 |
self.register_buffer("inv_freq", inv_freq, persistent=False)
|
| 198 |
|
| 199 |
+
t = torch.arange(self.max_seq_len_cached, device=device, dtype=self.inv_freq.dtype)
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|
| 200 |
|
| 201 |
freqs = torch.outer(t, self.inv_freq)
|
| 202 |
# Different from paper, but it uses a different permutation in order to obtain the same calculation
|
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|
| 205 |
self.register_buffer("sin_cached", emb.sin().to(dtype), persistent=False)
|
| 206 |
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| 207 |
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|
| 208 |
# Copied from transformers.models.llama.modeling_llama.rotate_half
|
| 209 |
def rotate_half(x):
|
| 210 |
"""Rotates half the hidden dims of the input."""
|
|
|
|
| 237 |
"""
|
| 238 |
cos = cos[position_ids].unsqueeze(unsqueeze_dim)
|
| 239 |
sin = sin[position_ids].unsqueeze(unsqueeze_dim)
|
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|
| 240 |
q_embed = (q * cos) + (rotate_half(q) * sin)
|
| 241 |
k_embed = (k * cos) + (rotate_half(k) * sin)
|
| 242 |
return q_embed, k_embed
|
| 243 |
|
| 244 |
|
| 245 |
+
class DeepseekMLP(nn.Module):
|
| 246 |
+
def __init__(self, config, hidden_size = None, intermediate_size = None):
|
| 247 |
super().__init__()
|
| 248 |
self.config = config
|
| 249 |
self.hidden_size = config.hidden_size if hidden_size is None else hidden_size
|
| 250 |
+
self.intermediate_size = config.intermediate_size if intermediate_size is None else intermediate_size
|
|
|
|
|
|
|
| 251 |
|
| 252 |
self.gate_proj = nn.Linear(self.hidden_size, self.intermediate_size, bias=False)
|
| 253 |
self.up_proj = nn.Linear(self.hidden_size, self.intermediate_size, bias=False)
|
|
|
|
| 255 |
self.act_fn = ACT2FN[config.hidden_act]
|
| 256 |
|
| 257 |
def forward(self, x):
|
| 258 |
+
if self.config.pretraining_tp > 1:
|
| 259 |
+
slice = self.intermediate_size // self.config.pretraining_tp
|
| 260 |
+
gate_proj_slices = self.gate_proj.weight.split(slice, dim=0)
|
| 261 |
+
up_proj_slices = self.up_proj.weight.split(slice, dim=0)
|
| 262 |
+
down_proj_slices = self.down_proj.weight.split(slice, dim=1)
|
| 263 |
+
|
| 264 |
+
gate_proj = torch.cat(
|
| 265 |
+
[F.linear(x, gate_proj_slices[i]) for i in range(self.config.pretraining_tp)], dim=-1
|
| 266 |
+
)
|
| 267 |
+
up_proj = torch.cat([F.linear(x, up_proj_slices[i]) for i in range(self.config.pretraining_tp)], dim=-1)
|
| 268 |
+
|
| 269 |
+
intermediate_states = (self.act_fn(gate_proj) * up_proj).split(slice, dim=2)
|
| 270 |
+
down_proj = [
|
| 271 |
+
F.linear(intermediate_states[i], down_proj_slices[i]) for i in range(self.config.pretraining_tp)
|
| 272 |
+
]
|
| 273 |
+
down_proj = sum(down_proj)
|
| 274 |
+
else:
|
| 275 |
+
down_proj = self.down_proj(self.act_fn(self.gate_proj(x)) * self.up_proj(x))
|
| 276 |
+
|
| 277 |
return down_proj
|
| 278 |
|
| 279 |
|
|
|
|
| 283 |
self.config = config
|
| 284 |
self.top_k = config.num_experts_per_tok
|
| 285 |
self.n_routed_experts = config.n_routed_experts
|
| 286 |
+
|
| 287 |
self.scoring_func = config.scoring_func
|
| 288 |
self.alpha = config.aux_loss_alpha
|
| 289 |
self.seq_aux = config.seq_aux
|
|
|
|
|
|
|
|
|
|
| 290 |
|
| 291 |
# topk selection algorithm
|
| 292 |
self.norm_topk_prob = config.norm_topk_prob
|
| 293 |
self.gating_dim = config.hidden_size
|
| 294 |
+
self.weight = nn.Parameter(torch.empty((self.n_routed_experts, self.gating_dim)))
|
|
|
|
|
|
|
| 295 |
self.reset_parameters()
|
| 296 |
|
| 297 |
def reset_parameters(self) -> None:
|
| 298 |
+
import torch.nn.init as init
|
|
|
|
| 299 |
init.kaiming_uniform_(self.weight, a=math.sqrt(5))
|
| 300 |
+
|
| 301 |
def forward(self, hidden_states):
|
| 302 |
+
bsz, seq_len, h = hidden_states.shape
|
| 303 |
### compute gating score
|
| 304 |
hidden_states = hidden_states.view(-1, h)
|
| 305 |
+
logits = F.linear(hidden_states, self.weight, None)
|
| 306 |
+
if self.scoring_func == 'softmax':
|
| 307 |
+
scores = logits.softmax(dim=-1)
|
|
|
|
|
|
|
| 308 |
else:
|
| 309 |
+
raise NotImplementedError(f'insupportable scoring function for MoE gating: {self.scoring_func}')
|
| 310 |
+
|
|
|
|
|
|
|
| 311 |
### select top-k experts
|
| 312 |
+
topk_weight, topk_idx = torch.topk(scores, k=self.top_k, dim=-1, sorted=False)
|
| 313 |
+
|
|
|
|
|
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|
|
|
|
|
|
|
|
|
| 314 |
### norm gate to sum 1
|
| 315 |
if self.top_k > 1 and self.norm_topk_prob:
|
| 316 |
denominator = topk_weight.sum(dim=-1, keepdim=True) + 1e-20
|
| 317 |
topk_weight = topk_weight / denominator
|
| 318 |
+
|
|
|
|
| 319 |
### expert-level computation auxiliary loss
|
| 320 |
if self.training and self.alpha > 0.0:
|
| 321 |
scores_for_aux = scores
|
|
|
|
| 324 |
topk_idx_for_aux_loss = topk_idx.view(bsz, -1)
|
| 325 |
if self.seq_aux:
|
| 326 |
scores_for_seq_aux = scores_for_aux.view(bsz, seq_len, -1)
|
| 327 |
+
ce = torch.zeros(bsz, self.n_routed_experts, device=hidden_states.device)
|
| 328 |
+
ce.scatter_add_(1, topk_idx_for_aux_loss, torch.ones(bsz, seq_len * aux_topk, device=hidden_states.device)).div_(seq_len * aux_topk / self.n_routed_experts)
|
| 329 |
+
aux_loss = (ce * scores_for_seq_aux.mean(dim = 1)).sum(dim = 1).mean() * self.alpha
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 330 |
else:
|
| 331 |
+
mask_ce = F.one_hot(topk_idx_for_aux_loss.view(-1), num_classes=self.n_routed_experts)
|
|
|
|
|
|
|
| 332 |
ce = mask_ce.float().mean(0)
|
| 333 |
Pi = scores_for_aux.mean(0)
|
| 334 |
fi = ce * self.n_routed_experts
|
|
|
|
| 340 |
|
| 341 |
class AddAuxiliaryLoss(torch.autograd.Function):
|
| 342 |
"""
|
| 343 |
+
The trick function of adding auxiliary (aux) loss,
|
| 344 |
which includes the gradient of the aux loss during backpropagation.
|
| 345 |
"""
|
|
|
|
| 346 |
@staticmethod
|
| 347 |
def forward(ctx, x, loss):
|
| 348 |
assert loss.numel() == 1
|
|
|
|
| 356 |
if ctx.required_aux_loss:
|
| 357 |
grad_loss = torch.ones(1, dtype=ctx.dtype, device=grad_output.device)
|
| 358 |
return grad_output, grad_loss
|
| 359 |
+
|
| 360 |
+
|
| 361 |
+
class DeepseekMoE(nn.Module):
|
| 362 |
"""
|
| 363 |
A mixed expert module containing shared experts.
|
| 364 |
"""
|
|
|
|
| 365 |
def __init__(self, config):
|
| 366 |
super().__init__()
|
| 367 |
self.config = config
|
| 368 |
self.num_experts_per_tok = config.num_experts_per_tok
|
| 369 |
+
self.experts = nn.ModuleList([DeepseekMLP(config, intermediate_size = config.moe_intermediate_size) for i in range(config.n_routed_experts)])
|
|
|
|
|
|
|
|
|
|
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|
|
|
|
|
|
|
|
|
| 370 |
self.gate = MoEGate(config)
|
| 371 |
if config.n_shared_experts is not None:
|
| 372 |
intermediate_size = config.moe_intermediate_size * config.n_shared_experts
|
| 373 |
+
self.shared_experts = DeepseekMLP(config=config, intermediate_size = intermediate_size)
|
| 374 |
+
|
|
|
|
|
|
|
| 375 |
def forward(self, hidden_states):
|
| 376 |
identity = hidden_states
|
| 377 |
orig_shape = hidden_states.shape
|
|
|
|
| 379 |
hidden_states = hidden_states.view(-1, hidden_states.shape[-1])
|
| 380 |
flat_topk_idx = topk_idx.view(-1)
|
| 381 |
if self.training:
|
| 382 |
+
hidden_states = hidden_states.repeat_interleave(self.num_experts_per_tok, dim=0)
|
|
|
|
|
|
|
| 383 |
y = torch.empty_like(hidden_states)
|
| 384 |
for i, expert in enumerate(self.experts):
|
| 385 |
y[flat_topk_idx == i] = expert(hidden_states[flat_topk_idx == i])
|
| 386 |
y = (y.view(*topk_weight.shape, -1) * topk_weight.unsqueeze(-1)).sum(dim=1)
|
| 387 |
+
y = y.view(*orig_shape)
|
| 388 |
y = AddAuxiliaryLoss.apply(y, aux_loss)
|
| 389 |
else:
|
| 390 |
+
y = self.moe_infer(hidden_states, flat_topk_idx, topk_weight.view(-1, 1)).view(*orig_shape)
|
| 391 |
if self.config.n_shared_experts is not None:
|
| 392 |
y = y + self.shared_experts(identity)
|
| 393 |
return y
|
| 394 |
+
|
| 395 |
@torch.no_grad()
|
| 396 |
+
def moe_infer(self, x, flat_expert_indices, flat_expert_weights):
|
| 397 |
+
expert_cache = torch.zeros_like(x)
|
| 398 |
+
idxs = flat_expert_indices.argsort()
|
| 399 |
+
tokens_per_expert = flat_expert_indices.bincount().cpu().numpy().cumsum(0)
|
| 400 |
+
token_idxs = idxs // self.num_experts_per_tok
|
| 401 |
+
for i, end_idx in enumerate(tokens_per_expert):
|
| 402 |
+
start_idx = 0 if i == 0 else tokens_per_expert[i-1]
|
| 403 |
+
if start_idx == end_idx:
|
|
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|
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|
| 404 |
continue
|
| 405 |
+
expert = self.experts[i]
|
| 406 |
+
exp_token_idx = token_idxs[start_idx:end_idx]
|
| 407 |
+
expert_tokens = x[exp_token_idx]
|
| 408 |
+
expert_out = expert(expert_tokens)
|
| 409 |
+
expert_out.mul_(flat_expert_weights[idxs[start_idx:end_idx]])
|
| 410 |
+
expert_cache.scatter_reduce_(0, exp_token_idx.view(-1, 1).repeat(1, x.shape[-1]), expert_out, reduce='sum')
|
| 411 |
+
return expert_cache
|
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| 412 |
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# Copied from transformers.models.llama.modeling_llama.repeat_kv
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| 420 |
batch, num_key_value_heads, slen, head_dim = hidden_states.shape
|
| 421 |
if n_rep == 1:
|
| 422 |
return hidden_states
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| 423 |
+
hidden_states = hidden_states[:, :, None, :, :].expand(batch, num_key_value_heads, n_rep, slen, head_dim)
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| 424 |
return hidden_states.reshape(batch, num_key_value_heads * n_rep, slen, head_dim)
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| 425 |
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| 426 |
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| 427 |
+
# Copied from transformers.models.llama.modeling_llama.LlamaAttention with Llama->Deepseek
|
| 428 |
+
class DeepseekAttention(nn.Module):
|
| 429 |
"""Multi-headed attention from 'Attention Is All You Need' paper"""
|
| 430 |
|
| 431 |
+
def __init__(self, config: DeepseekConfig, layer_idx: Optional[int] = None):
|
| 432 |
super().__init__()
|
| 433 |
self.config = config
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| 434 |
self.layer_idx = layer_idx
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| 442 |
self.attention_dropout = config.attention_dropout
|
| 443 |
self.hidden_size = config.hidden_size
|
| 444 |
self.num_heads = config.num_attention_heads
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| 445 |
+
self.head_dim = self.hidden_size // self.num_heads
|
| 446 |
+
self.num_key_value_heads = config.num_key_value_heads
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| 447 |
+
self.num_key_value_groups = self.num_heads // self.num_key_value_heads
|
| 448 |
self.max_position_embeddings = config.max_position_embeddings
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| 449 |
self.rope_theta = config.rope_theta
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| 450 |
self.is_causal = True
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| 451 |
|
| 452 |
+
if (self.head_dim * self.num_heads) != self.hidden_size:
|
| 453 |
+
raise ValueError(
|
| 454 |
+
f"hidden_size must be divisible by num_heads (got `hidden_size`: {self.hidden_size}"
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| 455 |
+
f" and `num_heads`: {self.num_heads})."
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| 456 |
)
|
| 457 |
|
| 458 |
+
self.q_proj = nn.Linear(self.hidden_size, self.num_heads * self.head_dim, bias=config.attention_bias)
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| 459 |
+
self.k_proj = nn.Linear(self.hidden_size, self.num_key_value_heads * self.head_dim, bias=config.attention_bias)
|
| 460 |
+
self.v_proj = nn.Linear(self.hidden_size, self.num_key_value_heads * self.head_dim, bias=config.attention_bias)
|
| 461 |
+
self.o_proj = nn.Linear(self.num_heads * self.head_dim, self.hidden_size, bias=config.attention_bias)
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| 462 |
self._init_rope()
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| 463 |
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| 464 |
def _init_rope(self):
|
| 465 |
if self.config.rope_scaling is None:
|
| 466 |
+
self.rotary_emb = DeepseekRotaryEmbedding(
|
| 467 |
+
self.head_dim,
|
| 468 |
max_position_embeddings=self.max_position_embeddings,
|
| 469 |
base=self.rope_theta,
|
| 470 |
)
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|
| 472 |
scaling_type = self.config.rope_scaling["type"]
|
| 473 |
scaling_factor = self.config.rope_scaling["factor"]
|
| 474 |
if scaling_type == "linear":
|
| 475 |
+
self.rotary_emb = DeepseekLinearScalingRotaryEmbedding(
|
| 476 |
+
self.head_dim,
|
| 477 |
max_position_embeddings=self.max_position_embeddings,
|
| 478 |
scaling_factor=scaling_factor,
|
| 479 |
base=self.rope_theta,
|
| 480 |
)
|
| 481 |
elif scaling_type == "dynamic":
|
| 482 |
+
self.rotary_emb = DeepseekDynamicNTKScalingRotaryEmbedding(
|
| 483 |
+
self.head_dim,
|
| 484 |
max_position_embeddings=self.max_position_embeddings,
|
| 485 |
scaling_factor=scaling_factor,
|
| 486 |
base=self.rope_theta,
|
| 487 |
)
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|
| 488 |
else:
|
| 489 |
raise ValueError(f"Unknown RoPE scaling type {scaling_type}")
|
| 490 |
|
| 491 |
def _shape(self, tensor: torch.Tensor, seq_len: int, bsz: int):
|
| 492 |
+
return tensor.view(bsz, seq_len, self.num_heads, self.head_dim).transpose(1, 2).contiguous()
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|
| 493 |
|
| 494 |
def forward(
|
| 495 |
self,
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|
| 505 |
warnings.warn(
|
| 506 |
"Passing `padding_mask` is deprecated and will be removed in v4.37. Please make sure use `attention_mask` instead.`"
|
| 507 |
)
|
| 508 |
+
|
| 509 |
bsz, q_len, _ = hidden_states.size()
|
| 510 |
|
| 511 |
+
if self.config.pretraining_tp > 1:
|
| 512 |
+
key_value_slicing = (self.num_key_value_heads * self.head_dim) // self.config.pretraining_tp
|
| 513 |
+
query_slices = self.q_proj.weight.split(
|
| 514 |
+
(self.num_heads * self.head_dim) // self.config.pretraining_tp, dim=0
|
| 515 |
+
)
|
| 516 |
+
key_slices = self.k_proj.weight.split(key_value_slicing, dim=0)
|
| 517 |
+
value_slices = self.v_proj.weight.split(key_value_slicing, dim=0)
|
| 518 |
+
|
| 519 |
+
query_states = [F.linear(hidden_states, query_slices[i]) for i in range(self.config.pretraining_tp)]
|
| 520 |
+
query_states = torch.cat(query_states, dim=-1)
|
| 521 |
+
|
| 522 |
+
key_states = [F.linear(hidden_states, key_slices[i]) for i in range(self.config.pretraining_tp)]
|
| 523 |
+
key_states = torch.cat(key_states, dim=-1)
|
| 524 |
+
|
| 525 |
+
value_states = [F.linear(hidden_states, value_slices[i]) for i in range(self.config.pretraining_tp)]
|
| 526 |
+
value_states = torch.cat(value_states, dim=-1)
|
| 527 |
+
|
| 528 |
else:
|
| 529 |
+
query_states = self.q_proj(hidden_states)
|
| 530 |
+
key_states = self.k_proj(hidden_states)
|
| 531 |
+
value_states = self.v_proj(hidden_states)
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|
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|
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|
|
| 532 |
|
| 533 |
+
query_states = query_states.view(bsz, q_len, self.num_heads, self.head_dim).transpose(1, 2)
|
| 534 |
+
key_states = key_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
|
| 535 |
+
value_states = value_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
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|
| 536 |
|
| 537 |
+
kv_seq_len = key_states.shape[-2]
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|
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|
|
|
| 538 |
if past_key_value is not None:
|
| 539 |
if self.layer_idx is None:
|
| 540 |
raise ValueError(
|
|
|
|
| 544 |
)
|
| 545 |
kv_seq_len += past_key_value.get_usable_length(kv_seq_len, self.layer_idx)
|
| 546 |
cos, sin = self.rotary_emb(value_states, seq_len=kv_seq_len)
|
| 547 |
+
query_states, key_states = apply_rotary_pos_emb(query_states, key_states, cos, sin, position_ids)
|
| 548 |
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|
| 549 |
if past_key_value is not None:
|
| 550 |
cache_kwargs = {"sin": sin, "cos": cos} # Specific to RoPE models
|
| 551 |
+
key_states, value_states = past_key_value.update(key_states, value_states, self.layer_idx, cache_kwargs)
|
|
|
|
|
|
|
| 552 |
|
| 553 |
+
key_states = repeat_kv(key_states, self.num_key_value_groups)
|
| 554 |
+
value_states = repeat_kv(value_states, self.num_key_value_groups)
|
| 555 |
+
|
| 556 |
+
attn_weights = torch.matmul(query_states, key_states.transpose(2, 3)) / math.sqrt(self.head_dim)
|
| 557 |
|
| 558 |
if attn_weights.size() != (bsz, self.num_heads, q_len, kv_seq_len):
|
| 559 |
raise ValueError(
|
| 560 |
f"Attention weights should be of size {(bsz, self.num_heads, q_len, kv_seq_len)}, but is"
|
| 561 |
f" {attn_weights.size()}"
|
| 562 |
)
|
| 563 |
+
|
| 564 |
if attention_mask is not None:
|
| 565 |
if attention_mask.size() != (bsz, 1, q_len, kv_seq_len):
|
| 566 |
raise ValueError(
|
|
|
|
| 569 |
attn_weights = attn_weights + attention_mask
|
| 570 |
|
| 571 |
# upcast attention to fp32
|
| 572 |
+
attn_weights = nn.functional.softmax(attn_weights, dim=-1, dtype=torch.float32).to(query_states.dtype)
|
| 573 |
+
attn_weights = nn.functional.dropout(attn_weights, p=self.attention_dropout, training=self.training)
|
|
|
|
|
|
|
|
|
|
|
|
|
| 574 |
attn_output = torch.matmul(attn_weights, value_states)
|
| 575 |
|
| 576 |
+
if attn_output.size() != (bsz, self.num_heads, q_len, self.head_dim):
|
| 577 |
raise ValueError(
|
| 578 |
+
f"`attn_output` should be of size {(bsz, self.num_heads, q_len, self.head_dim)}, but is"
|
| 579 |
f" {attn_output.size()}"
|
| 580 |
)
|
| 581 |
|
| 582 |
attn_output = attn_output.transpose(1, 2).contiguous()
|
| 583 |
|
| 584 |
+
attn_output = attn_output.reshape(bsz, q_len, self.hidden_size)
|
| 585 |
|
| 586 |
+
if self.config.pretraining_tp > 1:
|
| 587 |
+
attn_output = attn_output.split(self.hidden_size // self.config.pretraining_tp, dim=2)
|
| 588 |
+
o_proj_slices = self.o_proj.weight.split(self.hidden_size // self.config.pretraining_tp, dim=1)
|
| 589 |
+
attn_output = sum([F.linear(attn_output[i], o_proj_slices[i]) for i in range(self.config.pretraining_tp)])
|
| 590 |
+
else:
|
| 591 |
+
attn_output = self.o_proj(attn_output)
|
| 592 |
|
| 593 |
if not output_attentions:
|
| 594 |
attn_weights = None
|
|
|
|
| 596 |
return attn_output, attn_weights, past_key_value
|
| 597 |
|
| 598 |
|
| 599 |
+
# Copied from transformers.models.llama.modeling_llama.LlamaFlashAttention2 with Llama->Deepseek
|
| 600 |
+
class DeepseekFlashAttention2(DeepseekAttention):
|
| 601 |
"""
|
| 602 |
+
Deepseek flash attention module. This module inherits from `DeepseekAttention` as the weights of the module stays
|
| 603 |
untouched. The only required change would be on the forward pass where it needs to correctly call the public API of
|
| 604 |
flash attention and deal with padding tokens in case the input contains any of them.
|
| 605 |
"""
|
|
|
|
| 622 |
use_cache: bool = False,
|
| 623 |
**kwargs,
|
| 624 |
) -> Tuple[torch.Tensor, Optional[torch.Tensor], Optional[Tuple[torch.Tensor]]]:
|
| 625 |
+
# DeepseekFlashAttention2 attention does not support output_attentions
|
| 626 |
if "padding_mask" in kwargs:
|
| 627 |
warnings.warn(
|
| 628 |
"Passing `padding_mask` is deprecated and will be removed in v4.37. Please make sure use `attention_mask` instead.`"
|
|
|
|
| 635 |
|
| 636 |
bsz, q_len, _ = hidden_states.size()
|
| 637 |
|
| 638 |
+
query_states = self.q_proj(hidden_states)
|
| 639 |
+
key_states = self.k_proj(hidden_states)
|
| 640 |
+
value_states = self.v_proj(hidden_states)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 641 |
|
| 642 |
# Flash attention requires the input to have the shape
|
| 643 |
# batch_size x seq_length x head_dim x hidden_dim
|
| 644 |
# therefore we just need to keep the original shape
|
| 645 |
+
query_states = query_states.view(bsz, q_len, self.num_heads, self.head_dim).transpose(1, 2)
|
| 646 |
+
key_states = key_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
|
| 647 |
+
value_states = value_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
|
|
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|
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|
|
|
|
|
|
|
|
|
| 648 |
|
| 649 |
+
kv_seq_len = key_states.shape[-2]
|
| 650 |
if past_key_value is not None:
|
| 651 |
kv_seq_len += past_key_value.get_usable_length(kv_seq_len, self.layer_idx)
|
|
|
|
| 652 |
cos, sin = self.rotary_emb(value_states, seq_len=kv_seq_len)
|
| 653 |
+
query_states, key_states = apply_rotary_pos_emb(query_states, key_states, cos, sin, position_ids)
|
|
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|
|
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|
|
|
|
|
| 654 |
|
| 655 |
if past_key_value is not None:
|
| 656 |
cache_kwargs = {"sin": sin, "cos": cos} # Specific to RoPE models
|
| 657 |
+
key_states, value_states = past_key_value.update(key_states, value_states, self.layer_idx, cache_kwargs)
|
|
|
|
|
|
|
| 658 |
|
| 659 |
# TODO: These transpose are quite inefficient but Flash Attention requires the layout [batch_size, sequence_length, num_heads, head_dim]. We would need to refactor the KV cache
|
| 660 |
# to be able to avoid many of these transpose/reshape/view.
|
|
|
|
| 668 |
# therefore the input hidden states gets silently casted in float32. Hence, we need
|
| 669 |
# cast them back in the correct dtype just to be sure everything works as expected.
|
| 670 |
# This might slowdown training & inference so it is recommended to not cast the LayerNorms
|
| 671 |
+
# in fp32. (DeepseekRMSNorm handles it correctly)
|
| 672 |
|
| 673 |
input_dtype = query_states.dtype
|
| 674 |
if input_dtype == torch.float32:
|
|
|
|
| 678 |
elif torch.is_autocast_enabled():
|
| 679 |
target_dtype = torch.get_autocast_gpu_dtype()
|
| 680 |
else:
|
| 681 |
+
target_dtype = self.q_proj.weight.dtype
|
| 682 |
|
| 683 |
logger.warning_once(
|
| 684 |
f"The input hidden states seems to be silently casted in float32, this might be related to"
|
|
|
|
| 691 |
value_states = value_states.to(target_dtype)
|
| 692 |
|
| 693 |
attn_output = self._flash_attention_forward(
|
| 694 |
+
query_states, key_states, value_states, attention_mask, q_len, dropout=dropout_rate
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 695 |
)
|
|
|
|
|
|
|
| 696 |
|
| 697 |
+
attn_output = attn_output.reshape(bsz, q_len, self.hidden_size).contiguous()
|
|
|
|
|
|
|
| 698 |
attn_output = self.o_proj(attn_output)
|
| 699 |
|
| 700 |
if not output_attentions:
|
|
|
|
| 703 |
return attn_output, attn_weights, past_key_value
|
| 704 |
|
| 705 |
def _flash_attention_forward(
|
| 706 |
+
self, query_states, key_states, value_states, attention_mask, query_length, dropout=0.0, softmax_scale=None
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 707 |
):
|
| 708 |
"""
|
| 709 |
Calls the forward method of Flash Attention - if the input hidden states contain at least one padding token
|
|
|
|
| 727 |
if not self._flash_attn_uses_top_left_mask:
|
| 728 |
causal = self.is_causal
|
| 729 |
else:
|
| 730 |
+
# TODO: Remove the `query_length != 1` check once Flash Attention for RoCm is bumped to 2.1. For details, please see the comment in DeepseekFlashAttention2 __init__.
|
| 731 |
causal = self.is_causal and query_length != 1
|
| 732 |
|
| 733 |
# Contains at least one padding token in the sequence
|
| 734 |
if attention_mask is not None:
|
| 735 |
batch_size = query_states.shape[0]
|
| 736 |
+
query_states, key_states, value_states, indices_q, cu_seq_lens, max_seq_lens = self._upad_input(
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 737 |
query_states, key_states, value_states, attention_mask, query_length
|
| 738 |
)
|
| 739 |
|
|
|
|
| 753 |
causal=causal,
|
| 754 |
)
|
| 755 |
|
| 756 |
+
attn_output = pad_input(attn_output_unpad, indices_q, batch_size, query_length)
|
|
|
|
|
|
|
| 757 |
else:
|
| 758 |
attn_output = flash_attn_func(
|
| 759 |
+
query_states, key_states, value_states, dropout, softmax_scale=softmax_scale, causal=causal
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 760 |
)
|
| 761 |
|
| 762 |
return attn_output
|
| 763 |
|
| 764 |
+
def _upad_input(self, query_layer, key_layer, value_layer, attention_mask, query_length):
|
|
|
|
|
|
|
| 765 |
indices_k, cu_seqlens_k, max_seqlen_in_batch_k = _get_unpad_data(attention_mask)
|
| 766 |
batch_size, kv_seq_len, num_key_value_heads, head_dim = key_layer.shape
|
| 767 |
|
| 768 |
key_layer = index_first_axis(
|
| 769 |
+
key_layer.reshape(batch_size * kv_seq_len, num_key_value_heads, head_dim), indices_k
|
|
|
|
| 770 |
)
|
| 771 |
value_layer = index_first_axis(
|
| 772 |
+
value_layer.reshape(batch_size * kv_seq_len, num_key_value_heads, head_dim), indices_k
|
|
|
|
| 773 |
)
|
| 774 |
if query_length == kv_seq_len:
|
| 775 |
query_layer = index_first_axis(
|
| 776 |
+
query_layer.reshape(batch_size * kv_seq_len, self.num_heads, head_dim), indices_k
|
|
|
|
| 777 |
)
|
| 778 |
cu_seqlens_q = cu_seqlens_k
|
| 779 |
max_seqlen_in_batch_q = max_seqlen_in_batch_k
|
|
|
|
| 788 |
else:
|
| 789 |
# The -q_len: slice assumes left padding.
|
| 790 |
attention_mask = attention_mask[:, -query_length:]
|
| 791 |
+
query_layer, indices_q, cu_seqlens_q, max_seqlen_in_batch_q = unpad_input(query_layer, attention_mask)
|
|
|
|
|
|
|
| 792 |
|
| 793 |
return (
|
| 794 |
query_layer,
|
|
|
|
| 800 |
)
|
| 801 |
|
| 802 |
|
| 803 |
+
# Copied from transformers.models.llama.modeling_llama.LlamaSdpaAttention with Llama->Deepseek
|
| 804 |
+
class DeepseekSdpaAttention(DeepseekAttention):
|
| 805 |
+
"""
|
| 806 |
+
Deepseek attention module using torch.nn.functional.scaled_dot_product_attention. This module inherits from
|
| 807 |
+
`DeepseekAttention` as the weights of the module stays untouched. The only changes are on the forward pass to adapt to
|
| 808 |
+
SDPA API.
|
| 809 |
+
"""
|
| 810 |
+
|
| 811 |
+
# Adapted from DeepseekAttention.forward
|
| 812 |
+
def forward(
|
| 813 |
+
self,
|
| 814 |
+
hidden_states: torch.Tensor,
|
| 815 |
+
attention_mask: Optional[torch.Tensor] = None,
|
| 816 |
+
position_ids: Optional[torch.LongTensor] = None,
|
| 817 |
+
past_key_value: Optional[Cache] = None,
|
| 818 |
+
output_attentions: bool = False,
|
| 819 |
+
use_cache: bool = False,
|
| 820 |
+
) -> Tuple[torch.Tensor, Optional[torch.Tensor], Optional[Tuple[torch.Tensor]]]:
|
| 821 |
+
if output_attentions:
|
| 822 |
+
# TODO: Improve this warning with e.g. `model.config.attn_implementation = "manual"` once this is implemented.
|
| 823 |
+
logger.warning_once(
|
| 824 |
+
"DeepseekModel is using DeepseekSdpaAttention, but `torch.nn.functional.scaled_dot_product_attention` does not support `output_attentions=True`. Falling back to the manual attention implementation, "
|
| 825 |
+
'but specifying the manual implementation will be required from Transformers version v5.0.0 onwards. This warning can be removed using the argument `attn_implementation="eager"` when loading the model.'
|
| 826 |
+
)
|
| 827 |
+
return super().forward(
|
| 828 |
+
hidden_states=hidden_states,
|
| 829 |
+
attention_mask=attention_mask,
|
| 830 |
+
position_ids=position_ids,
|
| 831 |
+
past_key_value=past_key_value,
|
| 832 |
+
output_attentions=output_attentions,
|
| 833 |
+
use_cache=use_cache,
|
| 834 |
+
)
|
| 835 |
+
|
| 836 |
+
bsz, q_len, _ = hidden_states.size()
|
| 837 |
+
|
| 838 |
+
query_states = self.q_proj(hidden_states)
|
| 839 |
+
key_states = self.k_proj(hidden_states)
|
| 840 |
+
value_states = self.v_proj(hidden_states)
|
| 841 |
+
|
| 842 |
+
query_states = query_states.view(bsz, q_len, self.num_heads, self.head_dim).transpose(1, 2)
|
| 843 |
+
key_states = key_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
|
| 844 |
+
value_states = value_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
|
| 845 |
+
|
| 846 |
+
kv_seq_len = key_states.shape[-2]
|
| 847 |
+
if past_key_value is not None:
|
| 848 |
+
kv_seq_len += past_key_value.get_usable_length(kv_seq_len, self.layer_idx)
|
| 849 |
+
cos, sin = self.rotary_emb(value_states, seq_len=kv_seq_len)
|
| 850 |
+
|
| 851 |
+
query_states, key_states = apply_rotary_pos_emb(query_states, key_states, cos, sin, position_ids)
|
| 852 |
+
|
| 853 |
+
if past_key_value is not None:
|
| 854 |
+
cache_kwargs = {"sin": sin, "cos": cos} # Specific to RoPE models
|
| 855 |
+
key_states, value_states = past_key_value.update(key_states, value_states, self.layer_idx, cache_kwargs)
|
| 856 |
+
|
| 857 |
+
key_states = repeat_kv(key_states, self.num_key_value_groups)
|
| 858 |
+
value_states = repeat_kv(value_states, self.num_key_value_groups)
|
| 859 |
+
|
| 860 |
+
if attention_mask is not None:
|
| 861 |
+
if attention_mask.size() != (bsz, 1, q_len, kv_seq_len):
|
| 862 |
+
raise ValueError(
|
| 863 |
+
f"Attention mask should be of size {(bsz, 1, q_len, kv_seq_len)}, but is {attention_mask.size()}"
|
| 864 |
+
)
|
| 865 |
+
|
| 866 |
+
# SDPA with memory-efficient backend is currently (torch==2.1.2) bugged with non-contiguous inputs with custom attn_mask,
|
| 867 |
+
# Reference: https://github.com/pytorch/pytorch/issues/112577.
|
| 868 |
+
if query_states.device.type == "cuda" and attention_mask is not None:
|
| 869 |
+
query_states = query_states.contiguous()
|
| 870 |
+
key_states = key_states.contiguous()
|
| 871 |
+
value_states = value_states.contiguous()
|
| 872 |
+
|
| 873 |
+
attn_output = torch.nn.functional.scaled_dot_product_attention(
|
| 874 |
+
query_states,
|
| 875 |
+
key_states,
|
| 876 |
+
value_states,
|
| 877 |
+
attn_mask=attention_mask,
|
| 878 |
+
dropout_p=self.attention_dropout if self.training else 0.0,
|
| 879 |
+
# The q_len > 1 is necessary to match with AttentionMaskConverter.to_causal_4d that does not create a causal mask in case q_len == 1.
|
| 880 |
+
is_causal=self.is_causal and attention_mask is None and q_len > 1,
|
| 881 |
+
)
|
| 882 |
+
|
| 883 |
+
attn_output = attn_output.transpose(1, 2).contiguous()
|
| 884 |
+
attn_output = attn_output.reshape(bsz, q_len, self.hidden_size)
|
| 885 |
+
|
| 886 |
+
attn_output = self.o_proj(attn_output)
|
| 887 |
+
|
| 888 |
+
return attn_output, None, past_key_value
|
| 889 |
+
|
| 890 |
+
|
| 891 |
+
Deepseek_ATTENTION_CLASSES = {
|
| 892 |
+
"eager": DeepseekAttention,
|
| 893 |
+
"flash_attention_2": DeepseekFlashAttention2,
|
| 894 |
+
"sdpa": DeepseekSdpaAttention,
|
| 895 |
}
|
| 896 |
|
| 897 |
|
| 898 |
+
class DeepseekDecoderLayer(nn.Module):
|
| 899 |
+
def __init__(self, config: DeepseekConfig, layer_idx: int):
|
| 900 |
super().__init__()
|
| 901 |
self.hidden_size = config.hidden_size
|
| 902 |
|
| 903 |
+
self.self_attn = Deepseek_ATTENTION_CLASSES[config._attn_implementation](config=config, layer_idx=layer_idx)
|
|
|
|
|
|
|
| 904 |
|
| 905 |
+
self.mlp = DeepseekMoE(config) if (config.n_routed_experts is not None and \
|
| 906 |
+
layer_idx >= config.first_k_dense_replace and layer_idx % config.moe_layer_freq == 0) \
|
| 907 |
+
else DeepseekMLP(config)
|
| 908 |
+
self.input_layernorm = DeepseekRMSNorm(config.hidden_size, eps=config.rms_norm_eps)
|
| 909 |
+
self.post_attention_layernorm = DeepseekRMSNorm(config.hidden_size, eps=config.rms_norm_eps)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 910 |
|
| 911 |
def forward(
|
| 912 |
self,
|
|
|
|
| 917 |
output_attentions: Optional[bool] = False,
|
| 918 |
use_cache: Optional[bool] = False,
|
| 919 |
**kwargs,
|
| 920 |
+
) -> Tuple[torch.FloatTensor, Optional[Tuple[torch.FloatTensor, torch.FloatTensor]]]:
|
|
|
|
|
|
|
| 921 |
"""
|
| 922 |
Args:
|
| 923 |
hidden_states (`torch.FloatTensor`): input to the layer of shape `(batch, seq_len, embed_dim)`
|
|
|
|
| 969 |
return outputs
|
| 970 |
|
| 971 |
|
| 972 |
+
Deepseek_START_DOCSTRING = r"""
|
| 973 |
This model inherits from [`PreTrainedModel`]. Check the superclass documentation for the generic methods the
|
| 974 |
library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads
|
| 975 |
etc.)
|
|
|
|
| 979 |
and behavior.
|
| 980 |
|
| 981 |
Parameters:
|
| 982 |
+
config ([`DeepseekConfig`]):
|
| 983 |
Model configuration class with all the parameters of the model. Initializing with a config file does not
|
| 984 |
load the weights associated with the model, only the configuration. Check out the
|
| 985 |
[`~PreTrainedModel.from_pretrained`] method to load the model weights.
|
|
|
|
| 987 |
|
| 988 |
|
| 989 |
@add_start_docstrings(
|
| 990 |
+
"The bare Deepseek Model outputting raw hidden-states without any specific head on top.",
|
| 991 |
+
Deepseek_START_DOCSTRING,
|
| 992 |
)
|
| 993 |
+
class DeepseekPreTrainedModel(PreTrainedModel):
|
| 994 |
+
config_class = DeepseekConfig
|
| 995 |
base_model_prefix = "model"
|
| 996 |
supports_gradient_checkpointing = True
|
| 997 |
+
_no_split_modules = ["DeepseekDecoderLayer"]
|
| 998 |
_skip_keys_device_placement = "past_key_values"
|
| 999 |
_supports_flash_attn_2 = True
|
| 1000 |
+
_supports_sdpa = True
|
| 1001 |
_supports_cache_class = True
|
| 1002 |
|
| 1003 |
def _init_weights(self, module):
|
|
|
|
| 1012 |
module.weight.data[module.padding_idx].zero_()
|
| 1013 |
|
| 1014 |
|
| 1015 |
+
Deepseek_INPUTS_DOCSTRING = r"""
|
| 1016 |
Args:
|
| 1017 |
input_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`):
|
| 1018 |
Indices of input sequence tokens in the vocabulary. Padding will be ignored by default should you provide
|
|
|
|
| 1083 |
|
| 1084 |
|
| 1085 |
@add_start_docstrings(
|
| 1086 |
+
"The bare Deepseek Model outputting raw hidden-states without any specific head on top.",
|
| 1087 |
+
Deepseek_START_DOCSTRING,
|
| 1088 |
)
|
| 1089 |
+
class DeepseekModel(DeepseekPreTrainedModel):
|
| 1090 |
"""
|
| 1091 |
+
Transformer decoder consisting of *config.num_hidden_layers* layers. Each layer is a [`DeepseekDecoderLayer`]
|
| 1092 |
|
| 1093 |
Args:
|
| 1094 |
+
config: DeepseekConfig
|
| 1095 |
"""
|
| 1096 |
|
| 1097 |
+
def __init__(self, config: DeepseekConfig):
|
| 1098 |
super().__init__(config)
|
| 1099 |
self.padding_idx = config.pad_token_id
|
| 1100 |
self.vocab_size = config.vocab_size
|
| 1101 |
|
| 1102 |
+
self.embed_tokens = nn.Embedding(config.vocab_size, config.hidden_size, self.padding_idx)
|
|
|
|
|
|
|
| 1103 |
self.layers = nn.ModuleList(
|
| 1104 |
+
[DeepseekDecoderLayer(config, layer_idx) for layer_idx in range(config.num_hidden_layers)]
|
|
|
|
|
|
|
|
|
|
| 1105 |
)
|
| 1106 |
+
self._use_sdpa = config._attn_implementation == "sdpa"
|
| 1107 |
self._use_flash_attention_2 = config._attn_implementation == "flash_attention_2"
|
| 1108 |
+
self.norm = DeepseekRMSNorm(config.hidden_size, eps=config.rms_norm_eps)
|
| 1109 |
|
| 1110 |
self.gradient_checkpointing = False
|
| 1111 |
# Initialize weights and apply final processing
|
|
|
|
| 1117 |
def set_input_embeddings(self, value):
|
| 1118 |
self.embed_tokens = value
|
| 1119 |
|
| 1120 |
+
@add_start_docstrings_to_model_forward(Deepseek_INPUTS_DOCSTRING)
|
| 1121 |
def forward(
|
| 1122 |
self,
|
| 1123 |
input_ids: torch.LongTensor = None,
|
|
|
|
| 1130 |
output_hidden_states: Optional[bool] = None,
|
| 1131 |
return_dict: Optional[bool] = None,
|
| 1132 |
) -> Union[Tuple, BaseModelOutputWithPast]:
|
| 1133 |
+
output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1134 |
output_hidden_states = (
|
| 1135 |
+
output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states
|
|
|
|
|
|
|
| 1136 |
)
|
| 1137 |
use_cache = use_cache if use_cache is not None else self.config.use_cache
|
| 1138 |
|
| 1139 |
+
return_dict = return_dict if return_dict is not None else self.config.use_return_dict
|
|
|
|
|
|
|
| 1140 |
|
| 1141 |
# retrieve input_ids and inputs_embeds
|
| 1142 |
if input_ids is not None and inputs_embeds is not None:
|
| 1143 |
+
raise ValueError("You cannot specify both input_ids and inputs_embeds at the same time")
|
|
|
|
|
|
|
| 1144 |
elif input_ids is not None:
|
| 1145 |
batch_size, seq_length = input_ids.shape[:2]
|
| 1146 |
elif inputs_embeds is not None:
|
|
|
|
| 1165 |
if position_ids is None:
|
| 1166 |
device = input_ids.device if input_ids is not None else inputs_embeds.device
|
| 1167 |
position_ids = torch.arange(
|
| 1168 |
+
past_key_values_length, seq_length + past_key_values_length, dtype=torch.long, device=device
|
|
|
|
|
|
|
|
|
|
| 1169 |
)
|
| 1170 |
position_ids = position_ids.unsqueeze(0)
|
| 1171 |
|
|
|
|
| 1174 |
|
| 1175 |
if self._use_flash_attention_2:
|
| 1176 |
# 2d mask is passed through the layers
|
| 1177 |
+
attention_mask = attention_mask if (attention_mask is not None and 0 in attention_mask) else None
|
| 1178 |
+
elif self._use_sdpa and not output_attentions:
|
| 1179 |
+
# output_attentions=True can not be supported when using SDPA, and we fall back on
|
| 1180 |
+
# the manual implementation that requires a 4D causal mask in all cases.
|
| 1181 |
+
attention_mask = _prepare_4d_causal_attention_mask_for_sdpa(
|
|
|
|
|
|
|
|
|
|
| 1182 |
attention_mask,
|
| 1183 |
(batch_size, seq_length),
|
| 1184 |
inputs_embeds,
|
| 1185 |
past_key_values_length,
|
| 1186 |
)
|
| 1187 |
+
else:
|
| 1188 |
+
# 4d mask is passed through the layers
|
| 1189 |
+
attention_mask = _prepare_4d_causal_attention_mask(
|
| 1190 |
+
attention_mask, (batch_size, seq_length), inputs_embeds, past_key_values_length
|
| 1191 |
+
)
|
| 1192 |
|
| 1193 |
# embed positions
|
| 1194 |
hidden_states = inputs_embeds
|
|
|
|
| 1238 |
|
| 1239 |
next_cache = None
|
| 1240 |
if use_cache:
|
| 1241 |
+
next_cache = next_decoder_cache.to_legacy_cache() if use_legacy_cache else next_decoder_cache
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1242 |
if not return_dict:
|
| 1243 |
+
return tuple(v for v in [hidden_states, next_cache, all_hidden_states, all_self_attns] if v is not None)
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1244 |
return BaseModelOutputWithPast(
|
| 1245 |
last_hidden_state=hidden_states,
|
| 1246 |
past_key_values=next_cache,
|
|
|
|
| 1249 |
)
|
| 1250 |
|
| 1251 |
|
| 1252 |
+
class DeepseekForCausalLM(DeepseekPreTrainedModel):
|
| 1253 |
_tied_weights_keys = ["lm_head.weight"]
|
| 1254 |
|
| 1255 |
def __init__(self, config):
|
| 1256 |
super().__init__(config)
|
| 1257 |
+
self.model = DeepseekModel(config)
|
| 1258 |
self.vocab_size = config.vocab_size
|
| 1259 |
self.lm_head = nn.Linear(config.hidden_size, config.vocab_size, bias=False)
|
| 1260 |
|
|
|
|
| 1279 |
def get_decoder(self):
|
| 1280 |
return self.model
|
| 1281 |
|
| 1282 |
+
@add_start_docstrings_to_model_forward(Deepseek_INPUTS_DOCSTRING)
|
| 1283 |
+
@replace_return_docstrings(output_type=CausalLMOutputWithPast, config_class=_CONFIG_FOR_DOC)
|
|
|
|
|
|
|
| 1284 |
def forward(
|
| 1285 |
self,
|
| 1286 |
input_ids: torch.LongTensor = None,
|
|
|
|
| 1306 |
Example:
|
| 1307 |
|
| 1308 |
```python
|
| 1309 |
+
>>> from transformers import AutoTokenizer, DeepseekForCausalLM
|
| 1310 |
|
| 1311 |
+
>>> model = DeepseekForCausalLM.from_pretrained(PATH_TO_CONVERTED_WEIGHTS)
|
| 1312 |
>>> tokenizer = AutoTokenizer.from_pretrained(PATH_TO_CONVERTED_TOKENIZER)
|
| 1313 |
|
| 1314 |
>>> prompt = "Hey, are you conscious? Can you talk to me?"
|
|
|
|
| 1319 |
>>> tokenizer.batch_decode(generate_ids, skip_special_tokens=True, clean_up_tokenization_spaces=False)[0]
|
| 1320 |
"Hey, are you conscious? Can you talk to me?\nI'm not conscious, but I can talk to you."
|
| 1321 |
```"""
|
| 1322 |
+
output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1323 |
output_hidden_states = (
|
| 1324 |
+
output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1325 |
)
|
| 1326 |
+
return_dict = return_dict if return_dict is not None else self.config.use_return_dict
|
| 1327 |
|
| 1328 |
# decoder outputs consists of (dec_features, layer_state, dec_hidden, dec_attn)
|
| 1329 |
outputs = self.model(
|
|
|
|
| 1339 |
)
|
| 1340 |
|
| 1341 |
hidden_states = outputs[0]
|
| 1342 |
+
if self.config.pretraining_tp > 1:
|
| 1343 |
+
lm_head_slices = self.lm_head.weight.split(self.vocab_size // self.config.pretraining_tp, dim=0)
|
| 1344 |
+
logits = [F.linear(hidden_states, lm_head_slices[i]) for i in range(self.config.pretraining_tp)]
|
| 1345 |
+
logits = torch.cat(logits, dim=-1)
|
| 1346 |
+
else:
|
| 1347 |
+
logits = self.lm_head(hidden_states)
|
| 1348 |
logits = logits.float()
|
| 1349 |
|
| 1350 |
loss = None
|
|
|
|
| 1373 |
)
|
| 1374 |
|
| 1375 |
def prepare_inputs_for_generation(
|
| 1376 |
+
self, input_ids, past_key_values=None, attention_mask=None, inputs_embeds=None, **kwargs
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1377 |
):
|
| 1378 |
if past_key_values is not None:
|
| 1379 |
if isinstance(past_key_values, Cache):
|
|
|
|
| 1388 |
# 1 - If the length of the attention_mask exceeds the length of input_ids, then we are in a setting where
|
| 1389 |
# some of the inputs are exclusivelly passed as part of the cache (e.g. when passing input_embeds as
|
| 1390 |
# input)
|
| 1391 |
+
if attention_mask is not None and attention_mask.shape[1] > input_ids.shape[1]:
|
|
|
|
|
|
|
|
|
|
| 1392 |
input_ids = input_ids[:, -(attention_mask.shape[1] - past_length) :]
|
| 1393 |
# 2 - If the past_length is smaller than input_ids', then input_ids holds all input tokens. We can discard
|
| 1394 |
# input_ids based on the past_length.
|
|
|
|
| 1433 |
reordered_past = ()
|
| 1434 |
for layer_past in past_key_values:
|
| 1435 |
reordered_past += (
|
| 1436 |
+
tuple(past_state.index_select(0, beam_idx.to(past_state.device)) for past_state in layer_past),
|
|
|
|
|
|
|
|
|
|
| 1437 |
)
|
| 1438 |
return reordered_past
|
| 1439 |
|
| 1440 |
|
| 1441 |
@add_start_docstrings(
|
| 1442 |
"""
|
| 1443 |
+
The Deepseek Model transformer with a sequence classification head on top (linear layer).
|
| 1444 |
|
| 1445 |
+
[`DeepseekForSequenceClassification`] uses the last token in order to do the classification, as other causal models
|
| 1446 |
(e.g. GPT-2) do.
|
| 1447 |
|
| 1448 |
Since it does classification on the last token, it requires to know the position of the last token. If a
|
|
|
|
| 1451 |
padding tokens when `inputs_embeds` are passed instead of `input_ids`, it does the same (take the last value in
|
| 1452 |
each row of the batch).
|
| 1453 |
""",
|
| 1454 |
+
Deepseek_START_DOCSTRING,
|
| 1455 |
)
|
| 1456 |
+
class DeepseekForSequenceClassification(DeepseekPreTrainedModel):
|
| 1457 |
def __init__(self, config):
|
| 1458 |
super().__init__(config)
|
| 1459 |
self.num_labels = config.num_labels
|
| 1460 |
+
self.model = DeepseekModel(config)
|
| 1461 |
self.score = nn.Linear(config.hidden_size, self.num_labels, bias=False)
|
| 1462 |
|
| 1463 |
# Initialize weights and apply final processing
|
|
|
|
| 1469 |
def set_input_embeddings(self, value):
|
| 1470 |
self.model.embed_tokens = value
|
| 1471 |
|
| 1472 |
+
@add_start_docstrings_to_model_forward(Deepseek_INPUTS_DOCSTRING)
|
| 1473 |
def forward(
|
| 1474 |
self,
|
| 1475 |
input_ids: torch.LongTensor = None,
|
|
|
|
| 1489 |
config.num_labels - 1]`. If `config.num_labels == 1` a regression loss is computed (Mean-Square loss), If
|
| 1490 |
`config.num_labels > 1` a classification loss is computed (Cross-Entropy).
|
| 1491 |
"""
|
| 1492 |
+
return_dict = return_dict if return_dict is not None else self.config.use_return_dict
|
|
|
|
|
|
|
| 1493 |
|
| 1494 |
transformer_outputs = self.model(
|
| 1495 |
input_ids,
|
|
|
|
| 1511 |
batch_size = inputs_embeds.shape[0]
|
| 1512 |
|
| 1513 |
if self.config.pad_token_id is None and batch_size != 1:
|
| 1514 |
+
raise ValueError("Cannot handle batch sizes > 1 if no padding token is defined.")
|
|
|
|
|
|
|
| 1515 |
if self.config.pad_token_id is None:
|
| 1516 |
sequence_lengths = -1
|
| 1517 |
else:
|
| 1518 |
if input_ids is not None:
|
| 1519 |
+
sequence_lengths = (torch.eq(input_ids, self.config.pad_token_id).int().argmax(-1) - 1).to(
|
| 1520 |
+
logits.device
|
| 1521 |
+
)
|
| 1522 |
else:
|
| 1523 |
sequence_lengths = -1
|
| 1524 |
|
| 1525 |
+
pooled_logits = logits[torch.arange(batch_size, device=logits.device), sequence_lengths]
|
|
|
|
|
|
|
| 1526 |
|
| 1527 |
loss = None
|
| 1528 |
if labels is not None:
|
|
|
|
| 1530 |
if self.config.problem_type is None:
|
| 1531 |
if self.num_labels == 1:
|
| 1532 |
self.config.problem_type = "regression"
|
| 1533 |
+
elif self.num_labels > 1 and (labels.dtype == torch.long or labels.dtype == torch.int):
|
|
|
|
|
|
|
| 1534 |
self.config.problem_type = "single_label_classification"
|
| 1535 |
else:
|
| 1536 |
self.config.problem_type = "multi_label_classification"
|
|
|
|
| 1543 |
loss = loss_fct(pooled_logits, labels)
|
| 1544 |
elif self.config.problem_type == "single_label_classification":
|
| 1545 |
loss_fct = CrossEntropyLoss()
|
| 1546 |
+
loss = loss_fct(pooled_logits.view(-1, self.num_labels), labels.view(-1))
|
|
|
|
|
|
|
| 1547 |
elif self.config.problem_type == "multi_label_classification":
|
| 1548 |
loss_fct = BCEWithLogitsLoss()
|
| 1549 |
loss = loss_fct(pooled_logits, labels)
|
|
|
|
| 1557 |
past_key_values=transformer_outputs.past_key_values,
|
| 1558 |
hidden_states=transformer_outputs.hidden_states,
|
| 1559 |
attentions=transformer_outputs.attentions,
|
| 1560 |
+
)
|