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Parent(s):
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Browse files- config.json +1 -7
- modeling_glm.py +0 -1304
config.json
CHANGED
@@ -2,13 +2,7 @@
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"architectures": [
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"GlmForCausalLM"
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],
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"
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"AutoModel": "modeling_glm.GlmModel",
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"AutoModelForCausalLM": "modeling_glm.GlmForCausalLM",
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"AutoModelForSeq2SeqLM": "modeling_glm.GlmForTokenClassification",
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"AutoModelForSequenceClassification": "modeling_glm.GlmForSequenceClassification"
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},
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"rotary_percent": 1.0,
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"attention_bias": false,
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"attention_dropout": 0.0,
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"eos_token_id": [
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"architectures": [
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"GlmForCausalLM"
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],
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+
"partial_rotary_factor": 1.0,
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"attention_bias": false,
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"attention_dropout": 0.0,
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"eos_token_id": [
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modeling_glm.py
DELETED
@@ -1,1304 +0,0 @@
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import math
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from typing import List, Optional, Tuple, Union
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import torch
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import torch.nn as nn
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from transformers.activations import ACT2FN
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from transformers.cache_utils import Cache, DynamicCache, StaticCache
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from transformers.generation import GenerationMixin
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from transformers.modeling_attn_mask_utils import AttentionMaskConverter
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from transformers.modeling_flash_attention_utils import (
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FlashAttentionKwargs,
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_flash_attention_forward,
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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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TokenClassifierOutput,
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)
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from transformers.modeling_utils import PreTrainedModel
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from transformers.processing_utils import Unpack
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from transformers.utils import (
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add_code_sample_docstrings,
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add_start_docstrings,
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add_start_docstrings_to_model_forward,
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is_flash_attn_greater_or_equal_2_10,
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logging,
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replace_return_docstrings,
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)
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from transformers.models.glm.configuration_glm import GlmConfig
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logger = logging.get_logger(__name__)
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_CHECKPOINT_FOR_DOC = "THUDM/glm-edge-4b-chat"
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_CONFIG_FOR_DOC = "GlmConfig"
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class GlmRMSNorm(nn.Module):
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def __init__(self, hidden_size, eps=1e-6):
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"""
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GlmRMSNorm is equivalent to T5LayerNorm
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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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self.variance_epsilon = eps
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def forward(self, hidden_states):
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input_dtype = hidden_states.dtype
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hidden_states = hidden_states.to(torch.float32)
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variance = hidden_states.pow(2).mean(-1, keepdim=True)
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hidden_states = hidden_states * torch.rsqrt(variance + self.variance_epsilon)
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return self.weight * hidden_states.to(input_dtype)
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def extra_repr(self):
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return f"{tuple(self.weight.shape)}, eps={self.variance_epsilon}"
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class GlmRotaryEmbedding(nn.Module):
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def __init__(self, dim, max_position_embeddings=2048, base=10000, rotary_percent=0.5, device=None):
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super().__init__()
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self.rotary_percent = rotary_percent
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self.dim = dim * rotary_percent
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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 / (self.base ** (torch.arange(0, self.dim, 2, device=device, dtype=torch.float32) / self.dim))
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self.register_buffer("inv_freq", inv_freq)
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def forward(self, x, position_ids=None):
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batch_size, seq_len, head_dim = x.shape
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device = x.device
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dtype = x.dtype
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seq_idx = torch.arange(0, self.max_position_embeddings, device=device).float()
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idx_theta = torch.outer(seq_idx, self.inv_freq)
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if position_ids is not None:
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idx_theta = idx_theta[position_ids[0]]
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else:
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idx_theta = idx_theta[:seq_len]
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if self.rotary_percent == 0.5:
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idx_theta = torch.cat([idx_theta, idx_theta], dim=-1) # for glm-4-9b
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device_type = device.type
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device_type = device_type if isinstance(device_type, str) and device_type != "mps" else "cpu"
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with torch.autocast(device_type=device_type, enabled=False):
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cos = torch.cos(idx_theta).to(dtype=dtype)
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sin = torch.sin(idx_theta).to(dtype=dtype)
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cos = cos[None, :, :].expand(batch_size, seq_len, -1)
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sin = sin[None, :, :].expand(batch_size, seq_len, -1)
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return cos.to(dtype=x.dtype), sin.to(dtype=x.dtype)
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class GlmMLP(nn.Module):
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def __init__(self, config):
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super().__init__()
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self.config = config
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self.gate_up_proj = nn.Linear(config.hidden_size, 2 * config.intermediate_size, bias=False)
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self.down_proj = nn.Linear(config.intermediate_size, config.hidden_size, bias=False)
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self.activation_fn = ACT2FN[config.hidden_act]
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def forward(self, hidden_states: torch.FloatTensor) -> torch.FloatTensor:
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up_states = self.gate_up_proj(hidden_states)
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gate, up_states = up_states.chunk(2, dim=-1)
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up_states = up_states * self.activation_fn(gate)
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return self.down_proj(up_states)
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def repeat_kv(hidden_states: torch.Tensor, n_rep: int) -> torch.Tensor:
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"""
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This is the equivalent of torch.repeat_interleave(x, dim=1, repeats=n_rep). The hidden states go from (batch,
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num_key_value_heads, seqlen, head_dim) to (batch, num_attention_heads, seqlen, head_dim)
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"""
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batch, num_key_value_heads, slen, head_dim = hidden_states.shape
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if n_rep == 1:
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return hidden_states
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hidden_states = hidden_states[:, :, None, :, :].expand(batch, num_key_value_heads, n_rep, slen, head_dim)
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return hidden_states.reshape(batch, num_key_value_heads * n_rep, slen, head_dim)
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def rotate_half(x):
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"""Rotates half the hidden dims of the input."""
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x1 = x[..., 0::2]
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x2 = x[..., 1::2]
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return torch.stack((-x2, x1), dim=-1).flatten(-2)
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def apply_rotary_pos_emb(q, k, cos, sin, position_ids=None, unsqueeze_dim=1, rotary_percent=0.5):
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"""
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Applies Rotary Position Embedding to the query and key tensors.
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rotary_percent is for glm-4-9b(0.5) or glm-edge(1.0)
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"""
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cos = cos.unsqueeze(unsqueeze_dim)
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sin = sin.unsqueeze(unsqueeze_dim)
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# Interleave them instead of usual shape
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cos = cos[..., : int(cos.shape[-1] * rotary_percent)].repeat_interleave(2, dim=-1)
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sin = sin[..., : int(sin.shape[-1] * rotary_percent)].repeat_interleave(2, dim=-1)
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# Keep rotary_percent(half or not) for later concatenation
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rotary_dim = int(q.shape[-1] * rotary_percent)
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q, q_pass = q[..., :rotary_dim], q[..., rotary_dim:]
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k, k_pass = k[..., :rotary_dim], k[..., rotary_dim:]
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# Apply rotary embeddings on the first half or full tensor
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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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# Concatenate back to full shape
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q_embed = torch.cat([q_embed, q_pass], dim=-1)
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k_embed = torch.cat([k_embed, k_pass], dim=-1)
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return q_embed, k_embed
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class GlmAttention(nn.Module):
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"""Multi-headed attention from 'Attention Is All You Need' paper"""
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def __init__(self, config: GlmConfig, layer_idx: Optional[int] = None):
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super().__init__()
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self.config = config
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self.layer_idx = layer_idx
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if layer_idx is None:
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logger.warning_once(
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f"Instantiating {self.__class__.__name__} without passing a `layer_idx` is not recommended and will "
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"lead to errors during the forward call if caching is used. Please make sure to provide a `layer_idx` "
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"when creating this class."
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)
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self.attention_dropout = config.attention_dropout
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self.hidden_size = config.hidden_size
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self.num_heads = config.num_attention_heads
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self.head_dim = self.hidden_size // self.num_heads
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self.num_key_value_heads = config.num_key_value_heads
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self.num_key_value_groups = self.num_heads // self.num_key_value_heads
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self.is_causal = True
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self.scaling = 1 / math.sqrt(self.head_dim)
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self.rotary_percent = config.rotary_percent if hasattr(config, "rotary_percent") else 0.5
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if (self.head_dim * self.num_heads) != self.hidden_size:
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raise ValueError(
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f"hidden_size must be divisible by num_heads (got `hidden_size`: {self.hidden_size}"
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f" and `num_heads`: {self.num_heads})."
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)
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self.q_proj = nn.Linear(self.hidden_size, self.num_heads * self.head_dim, bias=config.attention_bias)
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self.k_proj = nn.Linear(
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self.hidden_size,
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self.num_key_value_heads * self.head_dim,
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bias=config.attention_bias,
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)
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self.v_proj = nn.Linear(
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self.hidden_size,
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self.num_key_value_heads * self.head_dim,
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bias=config.attention_bias,
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)
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self.o_proj = nn.Linear(self.hidden_size, self.hidden_size, bias=False)
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def forward(
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self,
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hidden_states: torch.Tensor,
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attention_mask: Optional[torch.Tensor] = None,
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position_ids: Optional[torch.LongTensor] = None,
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past_key_value: Optional[Cache] = None,
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output_attentions: bool = False,
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use_cache: bool = False,
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cache_position: Optional[torch.LongTensor] = None,
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position_embeddings: Optional[Tuple[torch.Tensor, torch.Tensor]] = None, # will become mandatory in v4.45
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**kwargs,
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) -> Tuple[torch.Tensor, Optional[torch.Tensor], Optional[Tuple[torch.Tensor]]]:
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bsz, q_len, _ = hidden_states.size()
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query_states = self.q_proj(hidden_states)
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key_states = self.k_proj(hidden_states)
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value_states = self.v_proj(hidden_states)
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query_states = query_states.view(bsz, q_len, self.num_heads, self.head_dim).transpose(1, 2)
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key_states = key_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
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value_states = value_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
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cos, sin = position_embeddings
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query_states, key_states = apply_rotary_pos_emb(
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query_states,
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key_states,
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cos,
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sin,
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rotary_percent=self.rotary_percent,
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)
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if past_key_value is not None:
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# sin and cos are specific to RoPE models; cache_position needed for the static cache
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cache_kwargs = {"sin": sin, "cos": cos, "cache_position": cache_position}
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key_states, value_states = past_key_value.update(key_states, value_states, self.layer_idx, cache_kwargs)
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key_states = repeat_kv(key_states, self.num_key_value_groups)
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value_states = repeat_kv(value_states, self.num_key_value_groups)
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attn_weights = torch.matmul(query_states, key_states.transpose(2, 3)) * self.scaling
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if attention_mask is not None: # no matter the length, we just slice it
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causal_mask = attention_mask[:, :, :, : key_states.shape[-2]]
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attn_weights = attn_weights + causal_mask
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# upcast attention to fp32
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attn_weights = nn.functional.softmax(attn_weights, dim=-1, dtype=torch.float32).to(query_states.dtype)
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attn_weights = nn.functional.dropout(attn_weights, p=self.attention_dropout, training=self.training)
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attn_output = torch.matmul(attn_weights, value_states)
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if attn_output.size() != (bsz, self.num_heads, q_len, self.head_dim):
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raise ValueError(
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f"`attn_output` should be of size {(bsz, self.num_heads, q_len, self.head_dim)}, but is"
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f" {attn_output.size()}"
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)
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attn_output = attn_output.transpose(1, 2).contiguous()
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attn_output = attn_output.view(bsz, q_len, -1)
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attn_output = self.o_proj(attn_output)
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if not output_attentions:
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attn_weights = None
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return attn_output, attn_weights, past_key_value
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class GlmFlashAttention2(GlmAttention):
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"""
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Glm flash attention module. This module inherits from `GlmAttention` as the weights of the module stays
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untouched. The only required change would be on the forward pass where it needs to correctly call the public API of
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flash attention and deal with padding tokens in case the input contains any of them.
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"""
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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# TODO: Should be removed once Flash Attention for RoCm is bumped to 2.1.
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# flash_attn<2.1 generates top-left aligned causal mask, while what is needed here is bottom-right alignement, that was made default for flash_attn>=2.1. This attribute is used to handle this difference. Reference: https://github.com/Dao-AILab/flash-attention/releases/tag/v2.1.0.
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# Beware that with flash_attn<2.1, using q_seqlen != k_seqlen (except for the case q_seqlen == 1) produces a wrong mask (top-left).
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self._flash_attn_uses_top_left_mask = not is_flash_attn_greater_or_equal_2_10()
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def forward(
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self,
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hidden_states: torch.Tensor,
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attention_mask: Optional[torch.LongTensor] = None,
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position_ids: Optional[torch.LongTensor] = None,
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past_key_value: Optional[Cache] = None,
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output_attentions: bool = False,
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use_cache: bool = False,
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cache_position: Optional[torch.LongTensor] = None,
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position_embeddings: Optional[Tuple[torch.Tensor, torch.Tensor]] = None, # will become mandatory in v4.45
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) -> Tuple[torch.Tensor, Optional[torch.Tensor], Optional[Tuple[torch.Tensor]]]:
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output_attentions = False
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bsz, q_len, _ = hidden_states.size()
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query_states = self.q_proj(hidden_states)
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key_states = self.k_proj(hidden_states)
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value_states = self.v_proj(hidden_states)
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# Flash attention requires the input to have the shape
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# batch_size x seq_length x head_dim x hidden_dim
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# therefore we just need to keep the original shape
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query_states = query_states.view(bsz, q_len, self.num_heads, self.head_dim).transpose(1, 2)
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key_states = key_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
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value_states = value_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
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cos, sin = position_embeddings
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query_states, key_states = apply_rotary_pos_emb(
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query_states,
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key_states,
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cos,
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sin,
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rotary_percent=self.rotary_percent,
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)
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if past_key_value is not None:
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# sin and cos are specific to RoPE models; cache_position needed for the static cache
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cache_kwargs = {"sin": sin, "cos": cos, "cache_position": cache_position}
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325 |
-
key_states, value_states = past_key_value.update(key_states, value_states, self.layer_idx, cache_kwargs)
|
326 |
-
|
327 |
-
# 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
|
328 |
-
# to be able to avoid many of these transpose/reshape/view.
|
329 |
-
query_states = query_states.transpose(1, 2)
|
330 |
-
key_states = key_states.transpose(1, 2)
|
331 |
-
value_states = value_states.transpose(1, 2)
|
332 |
-
|
333 |
-
dropout_rate = self.attention_dropout if self.training else 0.0
|
334 |
-
|
335 |
-
# In PEFT, usually we cast the layer norms in float32 for training stability reasons
|
336 |
-
# therefore the input hidden states gets silently casted in float32. Hence, we need
|
337 |
-
# cast them back in the correct dtype just to be sure everything works as expected.
|
338 |
-
# This might slowdown training & inference so it is recommended to not cast the LayerNorms
|
339 |
-
# in fp32. (GlmRMSNorm handles it correctly)
|
340 |
-
|
341 |
-
input_dtype = query_states.dtype
|
342 |
-
if input_dtype == torch.float32:
|
343 |
-
if torch.is_autocast_enabled():
|
344 |
-
target_dtype = torch.get_autocast_gpu_dtype()
|
345 |
-
# Handle the case where the model is quantized
|
346 |
-
elif hasattr(self.config, "_pre_quantization_dtype"):
|
347 |
-
target_dtype = self.config._pre_quantization_dtype
|
348 |
-
else:
|
349 |
-
target_dtype = self.q_proj.weight.dtype
|
350 |
-
|
351 |
-
logger.warning_once(
|
352 |
-
f"The input hidden states seems to be silently casted in float32, this might be related to"
|
353 |
-
f" the fact you have upcasted embedding or layer norm layers in float32. We will cast back the input in"
|
354 |
-
f" {target_dtype}."
|
355 |
-
)
|
356 |
-
|
357 |
-
query_states = query_states.to(target_dtype)
|
358 |
-
key_states = key_states.to(target_dtype)
|
359 |
-
value_states = value_states.to(target_dtype)
|
360 |
-
|
361 |
-
attn_output = _flash_attention_forward(
|
362 |
-
query_states,
|
363 |
-
key_states,
|
364 |
-
value_states,
|
365 |
-
attention_mask,
|
366 |
-
q_len,
|
367 |
-
position_ids=position_ids,
|
368 |
-
dropout=dropout_rate,
|
369 |
-
softmax_scale=self.scaling,
|
370 |
-
sliding_window=getattr(self, "sliding_window", None),
|
371 |
-
use_top_left_mask=self._flash_attn_uses_top_left_mask,
|
372 |
-
is_causal=self.is_causal,
|
373 |
-
)
|
374 |
-
|
375 |
-
attn_output = attn_output.reshape(bsz, q_len, -1).contiguous()
|
376 |
-
attn_output = self.o_proj(attn_output)
|
377 |
-
|
378 |
-
if not output_attentions:
|
379 |
-
attn_weights = None
|
380 |
-
|
381 |
-
return attn_output, attn_weights, past_key_value
|
382 |
-
|
383 |
-
|
384 |
-
class GlmSdpaAttention(GlmAttention):
|
385 |
-
"""
|
386 |
-
Glm attention module using torch.nn.functional.scaled_dot_product_attention. This module inherits from
|
387 |
-
`GlmAttention` as the weights of the module stays untouched. The only changes are on the forward pass to adapt to
|
388 |
-
SDPA API.
|
389 |
-
"""
|
390 |
-
|
391 |
-
# Adapted from GlmAttention.forward
|
392 |
-
def forward(
|
393 |
-
self,
|
394 |
-
hidden_states: torch.Tensor,
|
395 |
-
attention_mask: Optional[torch.Tensor] = None,
|
396 |
-
position_ids: Optional[torch.LongTensor] = None,
|
397 |
-
past_key_value: Optional[Cache] = None,
|
398 |
-
output_attentions: bool = False,
|
399 |
-
use_cache: bool = False,
|
400 |
-
cache_position: Optional[torch.LongTensor] = None,
|
401 |
-
position_embeddings: Optional[Tuple[torch.Tensor, torch.Tensor]] = None, # will become mandatory in v4.45
|
402 |
-
**kwargs,
|
403 |
-
) -> Tuple[torch.Tensor, Optional[torch.Tensor], Optional[Tuple[torch.Tensor]]]:
|
404 |
-
if output_attentions:
|
405 |
-
# TODO: Improve this warning with e.g. `model.config.attn_implementation = "manual"` once this is implemented.
|
406 |
-
logger.warning_once(
|
407 |
-
"GlmModel is using GlmSdpaAttention, but `torch.nn.functional.scaled_dot_product_attention` does not support `output_attentions=True`. Falling back to the manual attention implementation, "
|
408 |
-
'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.'
|
409 |
-
)
|
410 |
-
return super().forward(
|
411 |
-
hidden_states=hidden_states,
|
412 |
-
attention_mask=attention_mask,
|
413 |
-
position_ids=position_ids,
|
414 |
-
past_key_value=past_key_value,
|
415 |
-
output_attentions=output_attentions,
|
416 |
-
use_cache=use_cache,
|
417 |
-
cache_position=cache_position,
|
418 |
-
position_embeddings=position_embeddings,
|
419 |
-
)
|
420 |
-
|
421 |
-
bsz, q_len, _ = hidden_states.size()
|
422 |
-
|
423 |
-
query_states = self.q_proj(hidden_states)
|
424 |
-
key_states = self.k_proj(hidden_states)
|
425 |
-
value_states = self.v_proj(hidden_states)
|
426 |
-
|
427 |
-
query_states = query_states.view(bsz, q_len, self.num_heads, self.head_dim).transpose(1, 2)
|
428 |
-
key_states = key_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
|
429 |
-
value_states = value_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
|
430 |
-
|
431 |
-
cos, sin = position_embeddings
|
432 |
-
query_states, key_states = apply_rotary_pos_emb(
|
433 |
-
query_states,
|
434 |
-
key_states,
|
435 |
-
cos,
|
436 |
-
sin,
|
437 |
-
rotary_percent=self.rotary_percent,
|
438 |
-
)
|
439 |
-
|
440 |
-
if past_key_value is not None:
|
441 |
-
# sin and cos are specific to RoPE models; cache_position needed for the static cache
|
442 |
-
cache_kwargs = {"sin": sin, "cos": cos, "cache_position": cache_position}
|
443 |
-
key_states, value_states = past_key_value.update(key_states, value_states, self.layer_idx, cache_kwargs)
|
444 |
-
|
445 |
-
key_states = repeat_kv(key_states, self.num_key_value_groups)
|
446 |
-
value_states = repeat_kv(value_states, self.num_key_value_groups)
|
447 |
-
|
448 |
-
causal_mask = attention_mask
|
449 |
-
if attention_mask is not None:
|
450 |
-
causal_mask = causal_mask[:, :, :, : key_states.shape[-2]]
|
451 |
-
|
452 |
-
# SDPA with memory-efficient backend is currently (torch==2.1.2) bugged with non-contiguous inputs with custom attn_mask,
|
453 |
-
# Reference: https://github.com/pytorch/pytorch/issues/112577.
|
454 |
-
if query_states.device.type == "cuda" and causal_mask is not None:
|
455 |
-
query_states = query_states.contiguous()
|
456 |
-
key_states = key_states.contiguous()
|
457 |
-
value_states = value_states.contiguous()
|
458 |
-
|
459 |
-
# We dispatch to SDPA's Flash Attention or Efficient kernels via this `is_causal` if statement instead of an inline conditional assignment
|
460 |
-
# in SDPA to support both torch.compile's dynamic shapes and full graph options. An inline conditional prevents dynamic shapes from compiling.
|
461 |
-
is_causal = True if causal_mask is None and q_len > 1 else False
|
462 |
-
|
463 |
-
attn_output = torch.nn.functional.scaled_dot_product_attention(
|
464 |
-
query_states,
|
465 |
-
key_states,
|
466 |
-
value_states,
|
467 |
-
attn_mask=causal_mask,
|
468 |
-
dropout_p=self.attention_dropout if self.training else 0.0,
|
469 |
-
is_causal=is_causal,
|
470 |
-
scale=self.scaling,
|
471 |
-
)
|
472 |
-
|
473 |
-
attn_output = attn_output.transpose(1, 2).contiguous()
|
474 |
-
attn_output = attn_output.view(bsz, q_len, -1)
|
475 |
-
|
476 |
-
attn_output = self.o_proj(attn_output)
|
477 |
-
|
478 |
-
return attn_output, None, past_key_value
|
479 |
-
|
480 |
-
|
481 |
-
GLM_ATTENTION_CLASSES = {
|
482 |
-
"eager": GlmAttention,
|
483 |
-
"flash_attention_2": GlmFlashAttention2,
|
484 |
-
"sdpa": GlmSdpaAttention,
|
485 |
-
}
|
486 |
-
|
487 |
-
|
488 |
-
class GlmDecoderLayer(nn.Module):
|
489 |
-
def __init__(self, config: GlmConfig, layer_idx: Optional[int] = None):
|
490 |
-
super().__init__()
|
491 |
-
self.hidden_size = config.hidden_size
|
492 |
-
|
493 |
-
self.self_attn = GLM_ATTENTION_CLASSES[config._attn_implementation](config=config, layer_idx=layer_idx)
|
494 |
-
|
495 |
-
self.mlp = GlmMLP(config)
|
496 |
-
self.input_layernorm = GlmRMSNorm(config.hidden_size, eps=config.rms_norm_eps)
|
497 |
-
self.post_attention_layernorm = GlmRMSNorm(config.hidden_size, eps=config.rms_norm_eps)
|
498 |
-
|
499 |
-
def forward(
|
500 |
-
self,
|
501 |
-
hidden_states: torch.Tensor,
|
502 |
-
attention_mask: Optional[torch.Tensor] = None,
|
503 |
-
position_ids: Optional[torch.LongTensor] = None,
|
504 |
-
past_key_value: Optional[Cache] = None,
|
505 |
-
output_attentions: Optional[bool] = False,
|
506 |
-
use_cache: Optional[bool] = False,
|
507 |
-
cache_position: Optional[torch.LongTensor] = None,
|
508 |
-
position_embeddings: Optional[Tuple[torch.Tensor, torch.Tensor]] = None, # will become mandatory in v4.46
|
509 |
-
**kwargs,
|
510 |
-
) -> Tuple[torch.FloatTensor, Optional[Tuple[torch.FloatTensor, torch.FloatTensor]]]:
|
511 |
-
"""
|
512 |
-
Args:
|
513 |
-
hidden_states (`torch.FloatTensor`): input to the layer of shape `(batch, seq_len, embed_dim)`
|
514 |
-
attention_mask (`torch.FloatTensor`, *optional*):
|
515 |
-
attention mask of size `(batch_size, sequence_length)` if flash attention is used or `(batch_size, 1,
|
516 |
-
query_sequence_length, key_sequence_length)` if default attention is used.
|
517 |
-
output_attentions (`bool`, *optional*):
|
518 |
-
Whether or not to return the attentions tensors of all attention layers. See `attentions` under
|
519 |
-
returned tensors for more detail.
|
520 |
-
use_cache (`bool`, *optional*):
|
521 |
-
If set to `True`, `past_key_values` key value states are returned and can be used to speed up decoding
|
522 |
-
(see `past_key_values`).
|
523 |
-
past_key_value (`Tuple(torch.FloatTensor)`, *optional*): cached past key and value projection states
|
524 |
-
cache_position (`torch.LongTensor` of shape `(sequence_length)`, *optional*):
|
525 |
-
Indices depicting the position of the input sequence tokens in the sequence
|
526 |
-
position_embeddings (`Tuple[torch.FloatTensor, torch.FloatTensor]`, *optional*):
|
527 |
-
Tuple containing the cosine and sine positional embeddings of shape `(batch_size, seq_len, head_dim)`,
|
528 |
-
with `head_dim` being the embedding dimension of each attention head.
|
529 |
-
kwargs (`dict`, *optional*):
|
530 |
-
Arbitrary kwargs to be ignored, used for FSDP and other methods that injects code
|
531 |
-
into the model
|
532 |
-
"""
|
533 |
-
residual = hidden_states
|
534 |
-
|
535 |
-
hidden_states = self.input_layernorm(hidden_states)
|
536 |
-
|
537 |
-
# Self Attention
|
538 |
-
hidden_states, self_attn_weights, present_key_value = self.self_attn(
|
539 |
-
hidden_states=hidden_states,
|
540 |
-
attention_mask=attention_mask,
|
541 |
-
position_ids=position_ids,
|
542 |
-
past_key_value=past_key_value,
|
543 |
-
output_attentions=output_attentions,
|
544 |
-
use_cache=use_cache,
|
545 |
-
cache_position=cache_position,
|
546 |
-
position_embeddings=position_embeddings,
|
547 |
-
**kwargs,
|
548 |
-
)
|
549 |
-
hidden_states = residual + hidden_states
|
550 |
-
|
551 |
-
# Fully Connected
|
552 |
-
residual = hidden_states
|
553 |
-
hidden_states = self.post_attention_layernorm(hidden_states)
|
554 |
-
hidden_states = self.mlp(hidden_states)
|
555 |
-
hidden_states = residual + hidden_states
|
556 |
-
|
557 |
-
outputs = (hidden_states,)
|
558 |
-
|
559 |
-
if output_attentions:
|
560 |
-
outputs += (self_attn_weights,)
|
561 |
-
|
562 |
-
if use_cache:
|
563 |
-
outputs += (present_key_value,)
|
564 |
-
|
565 |
-
return outputs
|
566 |
-
|
567 |
-
|
568 |
-
GLM_START_DOCSTRING = r"""
|
569 |
-
This model inherits from [`PreTrainedModel`]. Check the superclass documentation for the generic methods the
|
570 |
-
library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads
|
571 |
-
etc.)
|
572 |
-
|
573 |
-
This model is also a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) subclass.
|
574 |
-
Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage
|
575 |
-
and behavior.
|
576 |
-
|
577 |
-
Parameters:
|
578 |
-
config ([`GlmConfig`]):
|
579 |
-
Model configuration class with all the parameters of the model. Initializing with a config file does not
|
580 |
-
load the weights associated with the model, only the configuration. Check out the
|
581 |
-
[`~PreTrainedModel.from_pretrained`] method to load the model weights.
|
582 |
-
"""
|
583 |
-
|
584 |
-
|
585 |
-
@add_start_docstrings(
|
586 |
-
"The bare Glm Model outputting raw hidden-states without any specific head on top.",
|
587 |
-
GLM_START_DOCSTRING,
|
588 |
-
)
|
589 |
-
class GlmPreTrainedModel(PreTrainedModel):
|
590 |
-
config_class = GlmConfig
|
591 |
-
base_model_prefix = "model"
|
592 |
-
supports_gradient_checkpointing = True
|
593 |
-
_no_split_modules = ["GlmDecoderLayer"]
|
594 |
-
_skip_keys_device_placement = ["past_key_values"]
|
595 |
-
_supports_flash_attn_2 = True
|
596 |
-
_supports_sdpa = True
|
597 |
-
_supports_cache_class = True
|
598 |
-
_supports_quantized_cache = True
|
599 |
-
_supports_static_cache = True
|
600 |
-
|
601 |
-
def _init_weights(self, module):
|
602 |
-
std = self.config.initializer_range
|
603 |
-
if isinstance(module, nn.Linear):
|
604 |
-
module.weight.data.normal_(mean=0.0, std=std)
|
605 |
-
if module.bias is not None:
|
606 |
-
module.bias.data.zero_()
|
607 |
-
elif isinstance(module, nn.Embedding):
|
608 |
-
module.weight.data.normal_(mean=0.0, std=std)
|
609 |
-
if module.padding_idx is not None:
|
610 |
-
module.weight.data[module.padding_idx].zero_()
|
611 |
-
|
612 |
-
|
613 |
-
GLM_INPUTS_DOCSTRING = r"""
|
614 |
-
Args:
|
615 |
-
input_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`):
|
616 |
-
Indices of input sequence tokens in the vocabulary. Padding will be ignored by default should you provide
|
617 |
-
it.
|
618 |
-
|
619 |
-
Indices can be obtained using [`AutoTokenizer`]. See [`PreTrainedTokenizer.encode`] and
|
620 |
-
[`PreTrainedTokenizer.__call__`] for details.
|
621 |
-
|
622 |
-
[What are input IDs?](../glossary#input-ids)
|
623 |
-
attention_mask (`torch.Tensor` of shape `(batch_size, sequence_length)`, *optional*):
|
624 |
-
Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:
|
625 |
-
|
626 |
-
- 1 for tokens that are **not masked**,
|
627 |
-
- 0 for tokens that are **masked**.
|
628 |
-
|
629 |
-
[What are attention masks?](../glossary#attention-mask)
|
630 |
-
|
631 |
-
Indices can be obtained using [`AutoTokenizer`]. See [`PreTrainedTokenizer.encode`] and
|
632 |
-
[`PreTrainedTokenizer.__call__`] for details.
|
633 |
-
|
634 |
-
If `past_key_values` is used, optionally only the last `input_ids` have to be input (see
|
635 |
-
`past_key_values`).
|
636 |
-
|
637 |
-
If you want to change padding behavior, you should read [`modeling_opt._prepare_decoder_attention_mask`]
|
638 |
-
and modify to your needs. See diagram 1 in [the paper](https://arxiv.org/abs/1910.13461) for more
|
639 |
-
information on the default strategy.
|
640 |
-
|
641 |
-
- 1 indicates the head is **not masked**,
|
642 |
-
- 0 indicates the head is **masked**.
|
643 |
-
position_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`, *optional*):
|
644 |
-
Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0,
|
645 |
-
config.n_positions - 1]`.
|
646 |
-
|
647 |
-
[What are position IDs?](../glossary#position-ids)
|
648 |
-
past_key_values (`Cache` or `tuple(tuple(torch.FloatTensor))`, *optional*):
|
649 |
-
Pre-computed hidden-states (key and values in the self-attention blocks and in the cross-attention
|
650 |
-
blocks) that can be used to speed up sequential decoding. This typically consists in the `past_key_values`
|
651 |
-
returned by the model at a previous stage of decoding, when `use_cache=True` or `config.use_cache=True`.
|
652 |
-
|
653 |
-
Two formats are allowed:
|
654 |
-
- a [`~cache_utils.Cache`] instance, see our
|
655 |
-
[kv cache guide](https://huggingface.co/docs/transformers/en/kv_cache);
|
656 |
-
- Tuple of `tuple(torch.FloatTensor)` of length `config.n_layers`, with each tuple having 2 tensors of
|
657 |
-
shape `(batch_size, num_heads, sequence_length, embed_size_per_head)`). This is also known as the legacy
|
658 |
-
cache format.
|
659 |
-
|
660 |
-
The model will output the same cache format that is fed as input. If no `past_key_values` are passed, the
|
661 |
-
legacy cache format will be returned.
|
662 |
-
|
663 |
-
If `past_key_values` are used, the user can optionally input only the last `input_ids` (those that don't
|
664 |
-
have their past key value states given to this model) of shape `(batch_size, 1)` instead of all `input_ids`
|
665 |
-
of shape `(batch_size, sequence_length)`.
|
666 |
-
inputs_embeds (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`, *optional*):
|
667 |
-
Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This
|
668 |
-
is useful if you want more control over how to convert `input_ids` indices into associated vectors than the
|
669 |
-
model's internal embedding lookup matrix.
|
670 |
-
use_cache (`bool`, *optional*):
|
671 |
-
If set to `True`, `past_key_values` key value states are returned and can be used to speed up decoding (see
|
672 |
-
`past_key_values`).
|
673 |
-
output_attentions (`bool`, *optional*):
|
674 |
-
Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned
|
675 |
-
tensors for more detail.
|
676 |
-
output_hidden_states (`bool`, *optional*):
|
677 |
-
Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for
|
678 |
-
more detail.
|
679 |
-
return_dict (`bool`, *optional*):
|
680 |
-
Whether or not to return a [`~utils.ModelOutput`] instead of a plain tuple.
|
681 |
-
cache_position (`torch.LongTensor` of shape `(sequence_length)`, *optional*):
|
682 |
-
Indices depicting the position of the input sequence tokens in the sequence. Contrarily to `position_ids`,
|
683 |
-
this tensor is not affected by padding. It is used to update the cache in the correct position and to infer
|
684 |
-
the complete sequence length.
|
685 |
-
"""
|
686 |
-
|
687 |
-
|
688 |
-
@add_start_docstrings(
|
689 |
-
"The bare Glm Model outputting raw hidden-states without any specific head on top.",
|
690 |
-
GLM_START_DOCSTRING,
|
691 |
-
)
|
692 |
-
class GlmModel(GlmPreTrainedModel):
|
693 |
-
"""
|
694 |
-
Transformer decoder consisting of *config.num_hidden_layers* layers. Each layer is a [`GlmDecoderLayer`]
|
695 |
-
|
696 |
-
Args:
|
697 |
-
config: GlmConfig
|
698 |
-
"""
|
699 |
-
|
700 |
-
def __init__(self, config: GlmConfig):
|
701 |
-
super().__init__(config)
|
702 |
-
self.padding_idx = config.pad_token_id
|
703 |
-
self.vocab_size = config.vocab_size
|
704 |
-
self.rotary_percent = config.rotary_percent if hasattr(config, "rotary_percent") else 0.5
|
705 |
-
self.embed_tokens = nn.Embedding(config.vocab_size, config.hidden_size, self.padding_idx)
|
706 |
-
self.layers = nn.ModuleList(
|
707 |
-
[GlmDecoderLayer(config, layer_idx) for layer_idx in range(config.num_hidden_layers)]
|
708 |
-
)
|
709 |
-
self.norm = GlmRMSNorm(config.hidden_size, eps=config.rms_norm_eps)
|
710 |
-
self.rotary_emb = GlmRotaryEmbedding(
|
711 |
-
dim=config.head_dim,
|
712 |
-
max_position_embeddings=config.max_position_embeddings,
|
713 |
-
base=config.rope_theta,
|
714 |
-
rotary_percent=self.rotary_percent,
|
715 |
-
)
|
716 |
-
self.gradient_checkpointing = False
|
717 |
-
|
718 |
-
# Initialize weights and apply final processing
|
719 |
-
self.post_init()
|
720 |
-
|
721 |
-
def get_input_embeddings(self):
|
722 |
-
return self.embed_tokens
|
723 |
-
|
724 |
-
def set_input_embeddings(self, value):
|
725 |
-
self.embed_tokens = value
|
726 |
-
|
727 |
-
@add_start_docstrings_to_model_forward(GLM_INPUTS_DOCSTRING)
|
728 |
-
def forward(
|
729 |
-
self,
|
730 |
-
input_ids: torch.LongTensor = None,
|
731 |
-
attention_mask: Optional[torch.Tensor] = None,
|
732 |
-
position_ids: Optional[torch.LongTensor] = None,
|
733 |
-
past_key_values: Optional[Union[Cache, List[torch.FloatTensor]]] = None,
|
734 |
-
inputs_embeds: Optional[torch.FloatTensor] = None,
|
735 |
-
use_cache: Optional[bool] = None,
|
736 |
-
output_attentions: Optional[bool] = None,
|
737 |
-
output_hidden_states: Optional[bool] = None,
|
738 |
-
return_dict: Optional[bool] = None,
|
739 |
-
cache_position: Optional[torch.LongTensor] = None,
|
740 |
-
**flash_attn_kwargs: Unpack[FlashAttentionKwargs],
|
741 |
-
) -> Union[Tuple, BaseModelOutputWithPast]:
|
742 |
-
output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions
|
743 |
-
output_hidden_states = (
|
744 |
-
output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states
|
745 |
-
)
|
746 |
-
|
747 |
-
use_cache = use_cache if use_cache is not None else self.config.use_cache
|
748 |
-
return_dict = return_dict if return_dict is not None else self.config.use_return_dict
|
749 |
-
|
750 |
-
if (input_ids is None) ^ (inputs_embeds is not None):
|
751 |
-
raise ValueError("You must specify exactly one of input_ids or inputs_embeds")
|
752 |
-
|
753 |
-
if self.gradient_checkpointing and self.training and use_cache:
|
754 |
-
logger.warning_once(
|
755 |
-
"`use_cache=True` is incompatible with gradient checkpointing. Setting `use_cache=False`."
|
756 |
-
)
|
757 |
-
use_cache = False
|
758 |
-
|
759 |
-
if inputs_embeds is None:
|
760 |
-
inputs_embeds = self.embed_tokens(input_ids)
|
761 |
-
|
762 |
-
# kept for BC (non `Cache` `past_key_values` inputs)
|
763 |
-
return_legacy_cache = False
|
764 |
-
if use_cache and not isinstance(past_key_values, Cache):
|
765 |
-
return_legacy_cache = True
|
766 |
-
if past_key_values is None:
|
767 |
-
past_key_values = DynamicCache()
|
768 |
-
else:
|
769 |
-
past_key_values = DynamicCache.from_legacy_cache(past_key_values)
|
770 |
-
logger.warning_once(
|
771 |
-
"We detected that you are passing `past_key_values` as a tuple of tuples. This is deprecated and "
|
772 |
-
"will be removed in v4.47. Please convert your cache or use an appropriate `Cache` class "
|
773 |
-
"(https://huggingface.co/docs/transformers/kv_cache#legacy-cache-format)"
|
774 |
-
)
|
775 |
-
|
776 |
-
if cache_position is None:
|
777 |
-
past_seen_tokens = past_key_values.get_seq_length() if past_key_values is not None else 0
|
778 |
-
cache_position = torch.arange(
|
779 |
-
past_seen_tokens,
|
780 |
-
past_seen_tokens + inputs_embeds.shape[1],
|
781 |
-
device=inputs_embeds.device,
|
782 |
-
)
|
783 |
-
if position_ids is None:
|
784 |
-
position_ids = cache_position.unsqueeze(0)
|
785 |
-
|
786 |
-
causal_mask = self._update_causal_mask(
|
787 |
-
attention_mask,
|
788 |
-
inputs_embeds,
|
789 |
-
cache_position,
|
790 |
-
past_key_values,
|
791 |
-
output_attentions,
|
792 |
-
)
|
793 |
-
hidden_states = inputs_embeds
|
794 |
-
position_embeddings = self.rotary_emb(hidden_states, position_ids)
|
795 |
-
|
796 |
-
# decoder layers
|
797 |
-
all_hidden_states = () if output_hidden_states else None
|
798 |
-
all_self_attns = () if output_attentions else None
|
799 |
-
next_decoder_cache = None
|
800 |
-
|
801 |
-
for decoder_layer in self.layers:
|
802 |
-
if output_hidden_states:
|
803 |
-
all_hidden_states += (hidden_states,)
|
804 |
-
|
805 |
-
if self.gradient_checkpointing and self.training:
|
806 |
-
layer_outputs = self._gradient_checkpointing_func(
|
807 |
-
decoder_layer.__call__,
|
808 |
-
hidden_states,
|
809 |
-
causal_mask,
|
810 |
-
position_ids,
|
811 |
-
past_key_values,
|
812 |
-
output_attentions,
|
813 |
-
use_cache,
|
814 |
-
cache_position,
|
815 |
-
position_embeddings,
|
816 |
-
)
|
817 |
-
else:
|
818 |
-
layer_outputs = decoder_layer(
|
819 |
-
hidden_states,
|
820 |
-
attention_mask=causal_mask,
|
821 |
-
position_ids=position_ids,
|
822 |
-
past_key_value=past_key_values,
|
823 |
-
output_attentions=output_attentions,
|
824 |
-
use_cache=use_cache,
|
825 |
-
cache_position=cache_position,
|
826 |
-
position_embeddings=position_embeddings,
|
827 |
-
**flash_attn_kwargs,
|
828 |
-
)
|
829 |
-
|
830 |
-
hidden_states = layer_outputs[0]
|
831 |
-
|
832 |
-
if use_cache:
|
833 |
-
next_decoder_cache = layer_outputs[2 if output_attentions else 1]
|
834 |
-
|
835 |
-
if output_attentions:
|
836 |
-
all_self_attns += (layer_outputs[1],)
|
837 |
-
|
838 |
-
hidden_states = self.norm(hidden_states)
|
839 |
-
|
840 |
-
# add hidden states from the last decoder layer
|
841 |
-
if output_hidden_states:
|
842 |
-
all_hidden_states += (hidden_states,)
|
843 |
-
|
844 |
-
next_cache = next_decoder_cache if use_cache else None
|
845 |
-
if return_legacy_cache:
|
846 |
-
next_cache = next_cache.to_legacy_cache()
|
847 |
-
|
848 |
-
if not return_dict:
|
849 |
-
return tuple(v for v in [hidden_states, next_cache, all_hidden_states, all_self_attns] if v is not None)
|
850 |
-
return BaseModelOutputWithPast(
|
851 |
-
last_hidden_state=hidden_states,
|
852 |
-
past_key_values=next_cache,
|
853 |
-
hidden_states=all_hidden_states,
|
854 |
-
attentions=all_self_attns,
|
855 |
-
)
|
856 |
-
|
857 |
-
def _update_causal_mask(
|
858 |
-
self,
|
859 |
-
attention_mask: torch.Tensor,
|
860 |
-
input_tensor: torch.Tensor,
|
861 |
-
cache_position: torch.Tensor,
|
862 |
-
past_key_values: Cache,
|
863 |
-
output_attentions: bool,
|
864 |
-
):
|
865 |
-
if self.config._attn_implementation == "flash_attention_2":
|
866 |
-
if attention_mask is not None and 0.0 in attention_mask:
|
867 |
-
return attention_mask
|
868 |
-
return None
|
869 |
-
|
870 |
-
# For SDPA, when possible, we will rely on its `is_causal` argument instead of its `attn_mask` argument, in
|
871 |
-
# order to dispatch on Flash Attention 2. This feature is not compatible with static cache, as SDPA will fail
|
872 |
-
# to infer the attention mask.
|
873 |
-
past_seen_tokens = past_key_values.get_seq_length() if past_key_values is not None else 0
|
874 |
-
using_static_cache = isinstance(past_key_values, StaticCache)
|
875 |
-
|
876 |
-
# When output attentions is True, sdpa implementation's forward method calls the eager implementation's forward
|
877 |
-
if self.config._attn_implementation == "sdpa" and not using_static_cache and not output_attentions:
|
878 |
-
if AttentionMaskConverter._ignore_causal_mask_sdpa(
|
879 |
-
attention_mask,
|
880 |
-
inputs_embeds=input_tensor,
|
881 |
-
past_key_values_length=past_seen_tokens,
|
882 |
-
is_training=self.training,
|
883 |
-
):
|
884 |
-
return None
|
885 |
-
|
886 |
-
dtype, device = input_tensor.dtype, input_tensor.device
|
887 |
-
sequence_length = input_tensor.shape[1]
|
888 |
-
if using_static_cache:
|
889 |
-
target_length = past_key_values.get_max_cache_shape()
|
890 |
-
else:
|
891 |
-
target_length = (
|
892 |
-
attention_mask.shape[-1]
|
893 |
-
if isinstance(attention_mask, torch.Tensor)
|
894 |
-
else past_seen_tokens + sequence_length + 1
|
895 |
-
)
|
896 |
-
|
897 |
-
# In case the provided `attention` mask is 2D, we generate a causal mask here (4D).
|
898 |
-
causal_mask = self._prepare_4d_causal_attention_mask_with_cache_position(
|
899 |
-
attention_mask,
|
900 |
-
sequence_length=sequence_length,
|
901 |
-
target_length=target_length,
|
902 |
-
dtype=dtype,
|
903 |
-
device=device,
|
904 |
-
cache_position=cache_position,
|
905 |
-
batch_size=input_tensor.shape[0],
|
906 |
-
)
|
907 |
-
|
908 |
-
if (
|
909 |
-
self.config._attn_implementation == "sdpa"
|
910 |
-
and attention_mask is not None
|
911 |
-
and attention_mask.device.type == "cuda"
|
912 |
-
and not output_attentions
|
913 |
-
):
|
914 |
-
# Attend to all tokens in fully masked rows in the causal_mask, for example the relevant first rows when
|
915 |
-
# using left padding. This is required by F.scaled_dot_product_attention memory-efficient attention path.
|
916 |
-
# Details: https://github.com/pytorch/pytorch/issues/110213
|
917 |
-
min_dtype = torch.finfo(dtype).min
|
918 |
-
causal_mask = AttentionMaskConverter._unmask_unattended(causal_mask, min_dtype)
|
919 |
-
|
920 |
-
return causal_mask
|
921 |
-
|
922 |
-
@staticmethod
|
923 |
-
def _prepare_4d_causal_attention_mask_with_cache_position(
|
924 |
-
attention_mask: torch.Tensor,
|
925 |
-
sequence_length: int,
|
926 |
-
target_length: int,
|
927 |
-
dtype: torch.dtype,
|
928 |
-
device: torch.device,
|
929 |
-
cache_position: torch.Tensor,
|
930 |
-
batch_size: int,
|
931 |
-
**kwargs,
|
932 |
-
):
|
933 |
-
"""
|
934 |
-
Creates a causal 4D mask of shape `(batch_size, 1, query_length, key_value_length)` from a 2D mask of shape
|
935 |
-
`(batch_size, key_value_length)`, or if the input `attention_mask` is already 4D, do nothing.
|
936 |
-
|
937 |
-
Args:
|
938 |
-
attention_mask (`torch.Tensor`):
|
939 |
-
A 2D attention mask of shape `(batch_size, key_value_length)` or a 4D attention mask of shape
|
940 |
-
`(batch_size, 1, query_length, key_value_length)`.
|
941 |
-
sequence_length (`int`):
|
942 |
-
The sequence length being processed.
|
943 |
-
target_length (`int`):
|
944 |
-
The target length: when generating with static cache, the mask should be as long as the static cache,
|
945 |
-
to account for the 0 padding, the part of the cache that is not filled yet.
|
946 |
-
dtype (`torch.dtype`):
|
947 |
-
The dtype to use for the 4D attention mask.
|
948 |
-
device (`torch.device`):
|
949 |
-
The device to plcae the 4D attention mask on.
|
950 |
-
cache_position (`torch.Tensor`):
|
951 |
-
Indices depicting the position of the input sequence tokens in the sequence.
|
952 |
-
batch_size (`torch.Tensor`):
|
953 |
-
Batch size.
|
954 |
-
"""
|
955 |
-
if attention_mask is not None and attention_mask.dim() == 4:
|
956 |
-
# In this case we assume that the mask comes already in inverted form and requires no inversion or slicing.
|
957 |
-
causal_mask = attention_mask
|
958 |
-
else:
|
959 |
-
min_dtype = torch.finfo(dtype).min
|
960 |
-
causal_mask = torch.full(
|
961 |
-
(sequence_length, target_length),
|
962 |
-
fill_value=min_dtype,
|
963 |
-
dtype=dtype,
|
964 |
-
device=device,
|
965 |
-
)
|
966 |
-
if sequence_length != 1:
|
967 |
-
causal_mask = torch.triu(causal_mask, diagonal=1)
|
968 |
-
causal_mask *= torch.arange(target_length, device=device) > cache_position.reshape(-1, 1)
|
969 |
-
causal_mask = causal_mask[None, None, :, :].expand(batch_size, 1, -1, -1)
|
970 |
-
if attention_mask is not None:
|
971 |
-
causal_mask = causal_mask.clone() # copy to contiguous memory for in-place edit
|
972 |
-
mask_length = attention_mask.shape[-1]
|
973 |
-
padding_mask = causal_mask[:, :, :, :mask_length] + attention_mask[:, None, None, :]
|
974 |
-
padding_mask = padding_mask == 0
|
975 |
-
causal_mask[:, :, :, :mask_length] = causal_mask[:, :, :, :mask_length].masked_fill(
|
976 |
-
padding_mask, min_dtype
|
977 |
-
)
|
978 |
-
|
979 |
-
return causal_mask
|
980 |
-
|
981 |
-
|
982 |
-
class GlmForCausalLM(GlmPreTrainedModel, GenerationMixin):
|
983 |
-
_tied_weights_keys = ["lm_head.weight"]
|
984 |
-
|
985 |
-
def __init__(self, config: GlmConfig):
|
986 |
-
super().__init__(config)
|
987 |
-
self.model = GlmModel(config)
|
988 |
-
self.vocab_size = config.vocab_size
|
989 |
-
self.lm_head = nn.Linear(config.hidden_size, config.vocab_size, bias=False)
|
990 |
-
|
991 |
-
# Initialize weights and apply final processing
|
992 |
-
self.post_init()
|
993 |
-
|
994 |
-
def get_input_embeddings(self):
|
995 |
-
return self.model.embed_tokens
|
996 |
-
|
997 |
-
def set_input_embeddings(self, value):
|
998 |
-
self.model.embed_tokens = value
|
999 |
-
|
1000 |
-
def get_output_embeddings(self):
|
1001 |
-
return self.lm_head
|
1002 |
-
|
1003 |
-
def set_output_embeddings(self, new_embeddings):
|
1004 |
-
self.lm_head = new_embeddings
|
1005 |
-
|
1006 |
-
def set_decoder(self, decoder):
|
1007 |
-
self.model = decoder
|
1008 |
-
|
1009 |
-
def get_decoder(self):
|
1010 |
-
return self.model
|
1011 |
-
|
1012 |
-
@add_start_docstrings_to_model_forward(GLM_INPUTS_DOCSTRING)
|
1013 |
-
@replace_return_docstrings(output_type=CausalLMOutputWithPast, config_class=_CONFIG_FOR_DOC)
|
1014 |
-
def forward(
|
1015 |
-
self,
|
1016 |
-
input_ids: torch.LongTensor = None,
|
1017 |
-
attention_mask: Optional[torch.Tensor] = None,
|
1018 |
-
position_ids: Optional[torch.LongTensor] = None,
|
1019 |
-
past_key_values: Optional[Union[Cache, List[torch.FloatTensor]]] = None,
|
1020 |
-
inputs_embeds: Optional[torch.FloatTensor] = None,
|
1021 |
-
labels: Optional[torch.LongTensor] = None,
|
1022 |
-
use_cache: Optional[bool] = None,
|
1023 |
-
output_attentions: Optional[bool] = None,
|
1024 |
-
output_hidden_states: Optional[bool] = None,
|
1025 |
-
return_dict: Optional[bool] = None,
|
1026 |
-
cache_position: Optional[torch.LongTensor] = None,
|
1027 |
-
num_logits_to_keep: int = 0,
|
1028 |
-
**loss_kwargs,
|
1029 |
-
) -> Union[Tuple, CausalLMOutputWithPast]:
|
1030 |
-
r"""
|
1031 |
-
Args:
|
1032 |
-
labels (`torch.LongTensor` of shape `(batch_size, sequence_length)`, *optional*):
|
1033 |
-
Labels for computing the masked language modeling loss. Indices should either be in `[0, ...,
|
1034 |
-
config.vocab_size]` or -100 (see `input_ids` docstring). Tokens with indices set to `-100` are ignored
|
1035 |
-
(masked), the loss is only computed for the tokens with labels in `[0, ..., config.vocab_size]`.
|
1036 |
-
|
1037 |
-
num_logits_to_keep (`int`, *optional*):
|
1038 |
-
Calculate logits for the last `num_logits_to_keep` tokens. If `0`, calculate logits for all
|
1039 |
-
`input_ids` (special case). Only last token logits are needed for generation, and calculating them only for that
|
1040 |
-
token can save memory, which becomes pretty significant for long sequences or large vocabulary size.
|
1041 |
-
|
1042 |
-
Returns:
|
1043 |
-
|
1044 |
-
Example:
|
1045 |
-
|
1046 |
-
```python
|
1047 |
-
>>> from transformers import AutoTokenizer, GlmForCausalLM
|
1048 |
-
|
1049 |
-
>>> model = GlmForCausalLM.from_pretrained("google/glm-7b")
|
1050 |
-
>>> tokenizer = AutoTokenizer.from_pretrained("google/glm-7b")
|
1051 |
-
|
1052 |
-
>>> prompt = "What is your favorite condiment?"
|
1053 |
-
>>> inputs = tokenizer(prompt, return_tensors="pt")
|
1054 |
-
|
1055 |
-
>>> # Generate
|
1056 |
-
>>> generate_ids = model.generate(inputs.input_ids, max_length=30)
|
1057 |
-
>>> tokenizer.batch_decode(generate_ids, skip_special_tokens=True, clean_up_tokenization_spaces=False)[0]
|
1058 |
-
"What is your favorite condiment?"
|
1059 |
-
```"""
|
1060 |
-
output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions
|
1061 |
-
output_hidden_states = (
|
1062 |
-
output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states
|
1063 |
-
)
|
1064 |
-
return_dict = return_dict if return_dict is not None else self.config.use_return_dict
|
1065 |
-
|
1066 |
-
# decoder outputs consists of (dec_features, layer_state, dec_hidden, dec_attn)
|
1067 |
-
outputs = self.model(
|
1068 |
-
input_ids=input_ids,
|
1069 |
-
attention_mask=attention_mask,
|
1070 |
-
position_ids=position_ids,
|
1071 |
-
past_key_values=past_key_values,
|
1072 |
-
inputs_embeds=inputs_embeds,
|
1073 |
-
use_cache=use_cache,
|
1074 |
-
output_attentions=output_attentions,
|
1075 |
-
output_hidden_states=output_hidden_states,
|
1076 |
-
return_dict=return_dict,
|
1077 |
-
cache_position=cache_position,
|
1078 |
-
)
|
1079 |
-
|
1080 |
-
hidden_states = outputs[0]
|
1081 |
-
# Only compute necessary logits, and do not upcast them to float if we are not computing the loss
|
1082 |
-
logits = self.lm_head(hidden_states[:, -num_logits_to_keep:, :])
|
1083 |
-
|
1084 |
-
loss = None
|
1085 |
-
if labels is not None:
|
1086 |
-
loss = self.loss_function(logits, labels, self.vocab_size, **loss_kwargs)
|
1087 |
-
|
1088 |
-
if not return_dict:
|
1089 |
-
output = (logits,) + outputs[1:]
|
1090 |
-
return (loss,) + output if loss is not None else output
|
1091 |
-
|
1092 |
-
return CausalLMOutputWithPast(
|
1093 |
-
loss=loss,
|
1094 |
-
logits=logits,
|
1095 |
-
past_key_values=outputs.past_key_values,
|
1096 |
-
hidden_states=outputs.hidden_states,
|
1097 |
-
attentions=outputs.attentions,
|
1098 |
-
)
|
1099 |
-
|
1100 |
-
|
1101 |
-
@add_start_docstrings(
|
1102 |
-
"""
|
1103 |
-
The Glm Model transformer with a sequence classification head on top (linear layer).
|
1104 |
-
|
1105 |
-
[`GlmForSequenceClassification`] uses the last token in order to do the classification, as other causal models
|
1106 |
-
(e.g. GPT-2) do.
|
1107 |
-
|
1108 |
-
Since it does classification on the last token, it requires to know the position of the last token. If a
|
1109 |
-
`pad_token_id` is defined in the configuration, it finds the last token that is not a padding token in each row. If
|
1110 |
-
no `pad_token_id` is defined, it simply takes the last value in each row of the batch. Since it cannot guess the
|
1111 |
-
padding tokens when `inputs_embeds` are passed instead of `input_ids`, it does the same (take the last value in
|
1112 |
-
each row of the batch).
|
1113 |
-
""",
|
1114 |
-
GLM_START_DOCSTRING,
|
1115 |
-
)
|
1116 |
-
class GlmForSequenceClassification(GlmPreTrainedModel):
|
1117 |
-
def __init__(self, config: GlmConfig):
|
1118 |
-
super().__init__(config)
|
1119 |
-
self.num_labels = config.num_labels
|
1120 |
-
self.model = GlmModel(config)
|
1121 |
-
self.score = nn.Linear(config.hidden_size, self.num_labels, bias=False)
|
1122 |
-
|
1123 |
-
# Initialize weights and apply final processing
|
1124 |
-
self.post_init()
|
1125 |
-
|
1126 |
-
def get_input_embeddings(self):
|
1127 |
-
return self.model.embed_tokens
|
1128 |
-
|
1129 |
-
def set_input_embeddings(self, value):
|
1130 |
-
self.model.embed_tokens = value
|
1131 |
-
|
1132 |
-
@add_start_docstrings_to_model_forward(GLM_INPUTS_DOCSTRING)
|
1133 |
-
def forward(
|
1134 |
-
self,
|
1135 |
-
input_ids: Optional[torch.LongTensor] = None,
|
1136 |
-
attention_mask: Optional[torch.Tensor] = None,
|
1137 |
-
position_ids: Optional[torch.LongTensor] = None,
|
1138 |
-
past_key_values: Optional[Union[Cache, List[torch.FloatTensor]]] = None,
|
1139 |
-
inputs_embeds: Optional[torch.FloatTensor] = None,
|
1140 |
-
labels: Optional[torch.LongTensor] = None,
|
1141 |
-
use_cache: Optional[bool] = None,
|
1142 |
-
output_attentions: Optional[bool] = None,
|
1143 |
-
output_hidden_states: Optional[bool] = None,
|
1144 |
-
return_dict: Optional[bool] = None,
|
1145 |
-
) -> Union[Tuple, SequenceClassifierOutputWithPast]:
|
1146 |
-
r"""
|
1147 |
-
labels (`torch.LongTensor` of shape `(batch_size,)`, *optional*):
|
1148 |
-
Labels for computing the sequence classification/regression loss. Indices should be in `[0, ...,
|
1149 |
-
config.num_labels - 1]`. If `config.num_labels == 1` a regression loss is computed (Mean-Square loss), If
|
1150 |
-
`config.num_labels > 1` a classification loss is computed (Cross-Entropy).
|
1151 |
-
"""
|
1152 |
-
return_dict = return_dict if return_dict is not None else self.config.use_return_dict
|
1153 |
-
|
1154 |
-
transformer_outputs = self.model(
|
1155 |
-
input_ids,
|
1156 |
-
attention_mask=attention_mask,
|
1157 |
-
position_ids=position_ids,
|
1158 |
-
past_key_values=past_key_values,
|
1159 |
-
inputs_embeds=inputs_embeds,
|
1160 |
-
use_cache=use_cache,
|
1161 |
-
output_attentions=output_attentions,
|
1162 |
-
output_hidden_states=output_hidden_states,
|
1163 |
-
return_dict=return_dict,
|
1164 |
-
)
|
1165 |
-
hidden_states = transformer_outputs[0]
|
1166 |
-
logits = self.score(hidden_states)
|
1167 |
-
|
1168 |
-
if input_ids is not None:
|
1169 |
-
batch_size = input_ids.shape[0]
|
1170 |
-
else:
|
1171 |
-
batch_size = inputs_embeds.shape[0]
|
1172 |
-
|
1173 |
-
if self.config.pad_token_id is None and batch_size != 1:
|
1174 |
-
raise ValueError("Cannot handle batch sizes > 1 if no padding token is defined.")
|
1175 |
-
if self.config.pad_token_id is None:
|
1176 |
-
sequence_lengths = -1
|
1177 |
-
else:
|
1178 |
-
if input_ids is not None:
|
1179 |
-
# if no pad token found, use modulo instead of reverse indexing for ONNX compatibility
|
1180 |
-
sequence_lengths = torch.eq(input_ids, self.config.pad_token_id).int().argmax(-1) - 1
|
1181 |
-
sequence_lengths = sequence_lengths % input_ids.shape[-1]
|
1182 |
-
sequence_lengths = sequence_lengths.to(logits.device)
|
1183 |
-
else:
|
1184 |
-
sequence_lengths = -1
|
1185 |
-
|
1186 |
-
pooled_logits = logits[torch.arange(batch_size, device=logits.device), sequence_lengths]
|
1187 |
-
|
1188 |
-
loss = None
|
1189 |
-
if labels is not None:
|
1190 |
-
loss = self.loss_function(
|
1191 |
-
logits=logits,
|
1192 |
-
labels=labels,
|
1193 |
-
pooled_logits=pooled_logits,
|
1194 |
-
config=self.config,
|
1195 |
-
)
|
1196 |
-
|
1197 |
-
if not return_dict:
|
1198 |
-
output = (pooled_logits,) + transformer_outputs[1:]
|
1199 |
-
return ((loss,) + output) if loss is not None else output
|
1200 |
-
|
1201 |
-
return SequenceClassifierOutputWithPast(
|
1202 |
-
loss=loss,
|
1203 |
-
logits=pooled_logits,
|
1204 |
-
past_key_values=transformer_outputs.past_key_values,
|
1205 |
-
hidden_states=transformer_outputs.hidden_states,
|
1206 |
-
attentions=transformer_outputs.attentions,
|
1207 |
-
)
|
1208 |
-
|
1209 |
-
|
1210 |
-
@add_start_docstrings(
|
1211 |
-
"""
|
1212 |
-
The Glm Model transformer with a token classification head on top (a linear layer on top of the hidden-states
|
1213 |
-
output) e.g. for Named-Entity-Recognition (NER) tasks.
|
1214 |
-
""",
|
1215 |
-
GLM_START_DOCSTRING,
|
1216 |
-
)
|
1217 |
-
class GlmForTokenClassification(GlmPreTrainedModel):
|
1218 |
-
def __init__(self, config: GlmConfig):
|
1219 |
-
super().__init__(config)
|
1220 |
-
self.num_labels = config.num_labels
|
1221 |
-
self.model = GlmModel(config)
|
1222 |
-
if getattr(config, "classifier_dropout", None) is not None:
|
1223 |
-
classifier_dropout = config.classifier_dropout
|
1224 |
-
elif getattr(config, "hidden_dropout", None) is not None:
|
1225 |
-
classifier_dropout = config.hidden_dropout
|
1226 |
-
else:
|
1227 |
-
classifier_dropout = 0.1
|
1228 |
-
self.dropout = nn.Dropout(classifier_dropout)
|
1229 |
-
self.score = nn.Linear(config.hidden_size, config.num_labels)
|
1230 |
-
|
1231 |
-
# Initialize weights and apply final processing
|
1232 |
-
self.post_init()
|
1233 |
-
|
1234 |
-
def get_input_embeddings(self):
|
1235 |
-
return self.model.embed_tokens
|
1236 |
-
|
1237 |
-
def set_input_embeddings(self, value):
|
1238 |
-
self.model.embed_tokens = value
|
1239 |
-
|
1240 |
-
@add_start_docstrings_to_model_forward(GLM_INPUTS_DOCSTRING)
|
1241 |
-
@add_code_sample_docstrings(
|
1242 |
-
checkpoint=_CHECKPOINT_FOR_DOC,
|
1243 |
-
output_type=TokenClassifierOutput,
|
1244 |
-
config_class=_CONFIG_FOR_DOC,
|
1245 |
-
)
|
1246 |
-
def forward(
|
1247 |
-
self,
|
1248 |
-
input_ids: Optional[torch.LongTensor] = None,
|
1249 |
-
attention_mask: Optional[torch.Tensor] = None,
|
1250 |
-
position_ids: Optional[torch.LongTensor] = None,
|
1251 |
-
past_key_values: Optional[List[torch.FloatTensor]] = None,
|
1252 |
-
inputs_embeds: Optional[torch.FloatTensor] = None,
|
1253 |
-
labels: Optional[torch.LongTensor] = None,
|
1254 |
-
use_cache: Optional[bool] = None,
|
1255 |
-
output_attentions: Optional[bool] = None,
|
1256 |
-
output_hidden_states: Optional[bool] = None,
|
1257 |
-
return_dict: Optional[bool] = None,
|
1258 |
-
) -> Union[Tuple, TokenClassifierOutput]:
|
1259 |
-
r"""
|
1260 |
-
labels (`torch.LongTensor` of shape `(batch_size,)`, *optional*):
|
1261 |
-
Labels for computing the sequence classification/regression loss. Indices should be in `[0, ...,
|
1262 |
-
config.num_labels - 1]`. If `config.num_labels == 1` a regression loss is computed (Mean-Square loss), If
|
1263 |
-
`config.num_labels > 1` a classification loss is computed (Cross-Entropy).
|
1264 |
-
"""
|
1265 |
-
return_dict = return_dict if return_dict is not None else self.config.use_return_dict
|
1266 |
-
|
1267 |
-
outputs = self.model(
|
1268 |
-
input_ids,
|
1269 |
-
attention_mask=attention_mask,
|
1270 |
-
position_ids=position_ids,
|
1271 |
-
past_key_values=past_key_values,
|
1272 |
-
inputs_embeds=inputs_embeds,
|
1273 |
-
use_cache=use_cache,
|
1274 |
-
output_attentions=output_attentions,
|
1275 |
-
output_hidden_states=output_hidden_states,
|
1276 |
-
return_dict=return_dict,
|
1277 |
-
)
|
1278 |
-
sequence_output = outputs[0]
|
1279 |
-
sequence_output = self.dropout(sequence_output)
|
1280 |
-
logits = self.score(sequence_output)
|
1281 |
-
|
1282 |
-
loss = None
|
1283 |
-
if labels is not None:
|
1284 |
-
loss = self.loss_function(logits, labels, self.config)
|
1285 |
-
|
1286 |
-
if not return_dict:
|
1287 |
-
output = (logits,) + outputs[2:]
|
1288 |
-
return ((loss,) + output) if loss is not None else output
|
1289 |
-
|
1290 |
-
return TokenClassifierOutput(
|
1291 |
-
loss=loss,
|
1292 |
-
logits=logits,
|
1293 |
-
hidden_states=outputs.hidden_states,
|
1294 |
-
attentions=outputs.attentions,
|
1295 |
-
)
|
1296 |
-
|
1297 |
-
|
1298 |
-
__all__ = [
|
1299 |
-
"GlmPreTrainedModel",
|
1300 |
-
"GlmModel",
|
1301 |
-
"GlmForCausalLM",
|
1302 |
-
"GlmForSequenceClassification",
|
1303 |
-
"GlmForTokenClassification",
|
1304 |
-
]
|
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