caisarl76 commited on
Commit
715adc8
1 Parent(s): db707bd

Upload OrionForCausalLM

Browse files
config.json CHANGED
@@ -6,7 +6,7 @@
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  "attention_bias": false,
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  "auto_map": {
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  "AutoConfig": "configuration_orion.OrionConfig",
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- "AutoModelForCausalLM": "OrionStarAI/Orion-14B-Chat--modeling_orion.OrionForCausalLM"
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  },
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  "bos_token_id": 1,
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  "eos_token_id": 2,
 
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  "attention_bias": false,
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  "auto_map": {
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  "AutoConfig": "configuration_orion.OrionConfig",
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+ "AutoModelForCausalLM": "modeling_orion.OrionForCausalLM"
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  },
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  "bos_token_id": 1,
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  "eos_token_id": 2,
generation_config.json ADDED
@@ -0,0 +1,13 @@
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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+ {
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+ "_from_model_config": true,
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+ "bos_token_id": 1,
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+ "do_sample": true,
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+ "eos_token_id": 2,
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+ "max_new_tokens": 1024,
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+ "pad_token_id": 0,
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+ "repetition_penalty": 1.05,
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+ "temperature": 0.3,
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+ "top_k": 5,
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+ "top_p": 0.9,
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+ "transformers_version": "4.36.0"
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+ }
generation_utils.py ADDED
@@ -0,0 +1,56 @@
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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+ from typing import List
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+ from queue import Queue
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+
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+ # build chat input prompt
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+ def build_chat_input(tokenizer, messages: List[dict]):
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+ # chat format:
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+ # single-turn: <s>Human: Hello!\n\nAssistant: </s>
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+ # multi-turn: <s>Human: Hello!\n\nAssistant: </s>Hi!</s>Human: How are you?\n\nAssistant: </s>I'm fine</s>
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+
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+ prompt = "<s>"
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+ for msg in messages:
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+ role = msg["role"]
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+ message = msg["content"]
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+ if message is None :
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+ continue
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+ if role == "user":
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+ prompt += "Human: " + message + "\n\nAssistant: </s>"
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+ if role == "assistant":
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+ prompt += message + "</s>"
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+
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+ input_tokens = tokenizer.encode(prompt)
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+ return input_tokens
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+
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+
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+ class TextIterStreamer:
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+ def __init__(self, tokenizer, skip_prompt=False, skip_special_tokens=False):
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+ self.tokenizer = tokenizer
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+ self.skip_prompt = skip_prompt
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+ self.skip_special_tokens = skip_special_tokens
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+ self.tokens = []
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+ self.text_queue = Queue()
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+ self.next_tokens_are_prompt = True
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+
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+ def put(self, value):
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+ if self.skip_prompt and self.next_tokens_are_prompt:
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+ self.next_tokens_are_prompt = False
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+ else:
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+ if len(value.shape) > 1:
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+ value = value[0]
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+ self.tokens.extend(value.tolist())
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+ self.text_queue.put(
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+ self.tokenizer.decode(self.tokens, skip_special_tokens=self.skip_special_tokens))
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+
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+ def end(self):
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+ self.text_queue.put(None)
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+
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+ def __iter__(self):
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+ return self
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+
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+ def __next__(self):
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+ value = self.text_queue.get()
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+ if value is None:
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+ raise StopIteration()
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+ else:
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+ return value
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+
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+ }
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+ }
modeling_orion.py ADDED
@@ -0,0 +1,1117 @@
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
+ # Copyright 2024 OrionStar Inc. team. All rights reserved.
2
+ # Copied and adapted from https://github.com/huggingface/transformers/blob/main/src/transformers/models/llama/modeling_llama.py
3
+
4
+ from transformers import AutoConfig, AutoModel
5
+
6
+ from .configuration_orion import OrionConfig
7
+
8
+ import numbers
9
+ import importlib
10
+ import math
11
+ from typing import List, Optional, Tuple, Union
12
+
13
+ import torch
14
+ import torch.nn.functional as F
15
+ from torch.nn.parameter import Parameter
16
+ import torch.utils.checkpoint
17
+ from torch import nn
18
+ from torch.nn import BCEWithLogitsLoss, CrossEntropyLoss, MSELoss
19
+ from torch.nn import init
20
+
21
+ from transformers.activations import ACT2FN
22
+ from transformers.modeling_outputs import BaseModelOutputWithPast, CausalLMOutputWithPast, SequenceClassifierOutputWithPast
23
+ from transformers.modeling_utils import PreTrainedModel
24
+ from transformers.pytorch_utils import ALL_LAYERNORM_LAYERS
25
+ from transformers.utils import (
26
+ add_start_docstrings,
27
+ add_start_docstrings_to_model_forward,
28
+ is_flash_attn_available,
29
+ logging,
30
+ replace_return_docstrings,
31
+ )
32
+ from .generation_utils import build_chat_input, TextIterStreamer
33
+ from transformers.generation.utils import GenerationConfig
34
+ from threading import Thread
35
+
36
+ if is_flash_attn_available():
37
+ from flash_attn import flash_attn_func, flash_attn_varlen_func
38
+ from flash_attn.bert_padding import index_first_axis, pad_input, unpad_input # noqa
39
+
40
+ logger = logging.get_logger(__name__)
41
+
42
+ _CONFIG_FOR_DOC = "OrionConfig"
43
+
44
+ def _get_unpad_data(padding_mask):
45
+ seqlens_in_batch = padding_mask.sum(dim=-1, dtype=torch.int32)
46
+ indices = torch.nonzero(padding_mask.flatten(), as_tuple=False).flatten()
47
+ max_seqlen_in_batch = seqlens_in_batch.max().item()
48
+ cu_seqlens = F.pad(torch.cumsum(seqlens_in_batch, dim=0, dtype=torch.torch.int32), (1, 0))
49
+ return (
50
+ indices,
51
+ cu_seqlens,
52
+ max_seqlen_in_batch,
53
+ )
54
+
55
+
56
+ # Copied from transformers.models.bart.modeling_bart._make_causal_mask
57
+ def _make_causal_mask(
58
+ input_ids_shape: torch.Size, dtype: torch.dtype, device: torch.device, past_key_values_length: int = 0
59
+ ):
60
+ """
61
+ Make causal mask used for bi-directional self-attention.
62
+ """
63
+ bsz, tgt_len = input_ids_shape
64
+ mask = torch.full((tgt_len, tgt_len), torch.finfo(dtype).min, device=device)
65
+ mask_cond = torch.arange(mask.size(-1), device=device)
66
+ mask.masked_fill_(mask_cond < (mask_cond + 1).view(mask.size(-1), 1), 0)
67
+ mask = mask.to(dtype)
68
+
69
+ if past_key_values_length > 0:
70
+ mask = torch.cat([torch.zeros(tgt_len, past_key_values_length, dtype=dtype, device=device), mask], dim=-1)
71
+ return mask[None, None, :, :].expand(bsz, 1, tgt_len, tgt_len + past_key_values_length)
72
+
73
+
74
+ # Copied from transformers.models.bart.modeling_bart._expand_mask
75
+ def _expand_mask(mask: torch.Tensor, dtype: torch.dtype, tgt_len: Optional[int] = None):
76
+ """
77
+ Expands attention_mask from `[bsz, seq_len]` to `[bsz, 1, tgt_seq_len, src_seq_len]`.
78
+ """
79
+ bsz, src_len = mask.size()
80
+ tgt_len = tgt_len if tgt_len is not None else src_len
81
+
82
+ expanded_mask = mask[:, None, None, :].expand(bsz, 1, tgt_len, src_len).to(dtype)
83
+
84
+ inverted_mask = 1.0 - expanded_mask
85
+
86
+ return inverted_mask.masked_fill(inverted_mask.to(torch.bool), torch.finfo(dtype).min)
87
+
88
+ class OrionRotaryEmbedding(nn.Module):
89
+ def __init__(self, dim, max_position_embeddings=2048, base=10000, device=None):
90
+ super().__init__()
91
+
92
+ self.dim = dim
93
+ self.max_position_embeddings = max_position_embeddings
94
+ self.base = base
95
+ inv_freq = 1.0 / (self.base ** (torch.arange(0, self.dim, 2).float().to(device) / self.dim))
96
+ self.register_buffer("inv_freq", inv_freq, persistent=False)
97
+
98
+ # Build here to make `torch.jit.trace` work.
99
+ self._set_cos_sin_cache(
100
+ seq_len=max_position_embeddings, device=self.inv_freq.device, dtype=torch.get_default_dtype()
101
+ )
102
+
103
+ def _set_cos_sin_cache(self, seq_len, device, dtype):
104
+ self.max_seq_len_cached = seq_len
105
+ t = torch.arange(self.max_seq_len_cached, device=device, dtype=self.inv_freq.dtype)
106
+
107
+ freqs = torch.einsum("i,j->ij", t, self.inv_freq)
108
+ # Different from paper, but it uses a different permutation in order to obtain the same calculation
109
+ emb = torch.cat((freqs, freqs), dim=-1)
110
+ self.register_buffer("cos_cached", emb.cos().to(dtype), persistent=False)
111
+ self.register_buffer("sin_cached", emb.sin().to(dtype), persistent=False)
112
+
113
+ def forward(self, x, seq_len=None):
114
+ # x: [bs, num_attention_heads, seq_len, head_size]
115
+ if seq_len > self.max_seq_len_cached:
116
+ self._set_cos_sin_cache(seq_len=seq_len, device=x.device, dtype=x.dtype)
117
+
118
+ return (
119
+ self.cos_cached[:seq_len].to(dtype=x.dtype),
120
+ self.sin_cached[:seq_len].to(dtype=x.dtype),
121
+ )
122
+
123
+
124
+ class OrionLinearScalingRotaryEmbedding(OrionRotaryEmbedding):
125
+ """OrionRotaryEmbedding extended with linear scaling. Credits to the Reddit user /u/kaiokendev"""
126
+
127
+ def __init__(self, dim, max_position_embeddings=2048, base=10000, device=None, scaling_factor=1.0):
128
+ self.scaling_factor = scaling_factor
129
+ super().__init__(dim, max_position_embeddings, base, device)
130
+
131
+ def _set_cos_sin_cache(self, seq_len, device, dtype):
132
+ self.max_seq_len_cached = seq_len
133
+ t = torch.arange(self.max_seq_len_cached, device=device, dtype=self.inv_freq.dtype)
134
+ t = t / self.scaling_factor
135
+
136
+ freqs = torch.einsum("i,j->ij", t, self.inv_freq)
137
+ # Different from paper, but it uses a different permutation in order to obtain the same calculation
138
+ emb = torch.cat((freqs, freqs), dim=-1)
139
+ self.register_buffer("cos_cached", emb.cos().to(dtype), persistent=False)
140
+ self.register_buffer("sin_cached", emb.sin().to(dtype), persistent=False)
141
+
142
+
143
+ class OrionDynamicNTKScalingRotaryEmbedding(OrionRotaryEmbedding):
144
+ """OrionRotaryEmbedding extended with Dynamic NTK scaling. Credits to the Reddit users /u/bloc97 and /u/emozilla"""
145
+
146
+ def __init__(self, dim, max_position_embeddings=2048, base=10000, device=None, scaling_factor=1.0):
147
+ self.scaling_factor = scaling_factor
148
+ super().__init__(dim, max_position_embeddings, base, device)
149
+
150
+ def _set_cos_sin_cache(self, seq_len, device, dtype):
151
+ self.max_seq_len_cached = seq_len
152
+
153
+ if seq_len > self.max_position_embeddings:
154
+ base = self.base * (
155
+ (self.scaling_factor * seq_len / self.max_position_embeddings) - (self.scaling_factor - 1)
156
+ ) ** (self.dim / (self.dim - 2))
157
+ inv_freq = 1.0 / (base ** (torch.arange(0, self.dim, 2).float().to(device) / self.dim))
158
+ self.register_buffer("inv_freq", inv_freq, persistent=False)
159
+
160
+ t = torch.arange(self.max_seq_len_cached, device=device, dtype=self.inv_freq.dtype)
161
+
162
+ freqs = torch.einsum("i,j->ij", t, self.inv_freq)
163
+ # Different from paper, but it uses a different permutation in order to obtain the same calculation
164
+ emb = torch.cat((freqs, freqs), dim=-1)
165
+ self.register_buffer("cos_cached", emb.cos().to(dtype), persistent=False)
166
+ self.register_buffer("sin_cached", emb.sin().to(dtype), persistent=False)
167
+
168
+
169
+ def rotate_half(x):
170
+ """Rotates half the hidden dims of the input."""
171
+ x1 = x[..., : x.shape[-1] // 2]
172
+ x2 = x[..., x.shape[-1] // 2 :]
173
+ return torch.cat((-x2, x1), dim=-1)
174
+
175
+
176
+ # Copied from transformers.models.gpt_neox.modeling_gpt_neox.apply_rotary_pos_emb
177
+ def apply_rotary_pos_emb(q, k, cos, sin, position_ids):
178
+ cos = cos[position_ids].unsqueeze(1) # [seq_len, dim] -> [batch_size, 1, seq_len, head_dim]
179
+ sin = sin[position_ids].unsqueeze(1)
180
+ q_embed = (q * cos) + (rotate_half(q) * sin)
181
+ k_embed = (k * cos) + (rotate_half(k) * sin)
182
+ return q_embed, k_embed
183
+
184
+
185
+ class OrionMLP(nn.Module):
186
+ def __init__(self, config):
187
+ super().__init__()
188
+ self.config = config
189
+ self.hidden_size = config.hidden_size
190
+ self.intermediate_size = config.intermediate_size
191
+ self.gate_proj = nn.Linear(self.hidden_size, self.intermediate_size, bias=False)
192
+ self.up_proj = nn.Linear(self.hidden_size, self.intermediate_size, bias=False)
193
+ self.down_proj = nn.Linear(self.intermediate_size, self.hidden_size, bias=False)
194
+ self.act_fn = ACT2FN[config.hidden_act]
195
+
196
+ def forward(self, x):
197
+ if self.config.pretraining_tp > 1:
198
+ slice = self.intermediate_size // self.config.pretraining_tp
199
+ gate_proj_slices = self.gate_proj.weight.split(slice, dim=0)
200
+ up_proj_slices = self.up_proj.weight.split(slice, dim=0)
201
+ down_proj_slices = self.down_proj.weight.split(slice, dim=1)
202
+
203
+ gate_proj = torch.cat(
204
+ [F.linear(x, gate_proj_slices[i]) for i in range(self.config.pretraining_tp)], dim=-1
205
+ )
206
+ up_proj = torch.cat([F.linear(x, up_proj_slices[i]) for i in range(self.config.pretraining_tp)], dim=-1)
207
+
208
+ intermediate_states = (self.act_fn(gate_proj) * up_proj).split(slice, dim=2)
209
+ down_proj = [
210
+ F.linear(intermediate_states[i], down_proj_slices[i]) for i in range(self.config.pretraining_tp)
211
+ ]
212
+ down_proj = sum(down_proj)
213
+ else:
214
+ down_proj = self.down_proj(self.act_fn(self.gate_proj(x)) * self.up_proj(x))
215
+
216
+ return down_proj
217
+
218
+
219
+ def repeat_kv(hidden_states: torch.Tensor, n_rep: int) -> torch.Tensor:
220
+ """
221
+ This is the equivalent of torch.repeat_interleave(x, dim=1, repeats=n_rep). The hidden states go from (batch,
222
+ num_key_value_heads, seqlen, head_dim) to (batch, num_attention_heads, seqlen, head_dim)
223
+ """
224
+ batch, num_key_value_heads, slen, head_dim = hidden_states.shape
225
+ if n_rep == 1:
226
+ return hidden_states
227
+ hidden_states = hidden_states[:, :, None, :, :].expand(batch, num_key_value_heads, n_rep, slen, head_dim)
228
+ return hidden_states.reshape(batch, num_key_value_heads * n_rep, slen, head_dim)
229
+
230
+
231
+ class OrionAttention(nn.Module):
232
+ """Multi-headed attention from 'Attention Is All You Need' paper"""
233
+
234
+ def __init__(self, config: OrionConfig):
235
+ super().__init__()
236
+ self.config = config
237
+ self.hidden_size = config.hidden_size
238
+ self.num_heads = config.num_attention_heads
239
+ self.head_dim = self.hidden_size // self.num_heads
240
+ self.num_key_value_heads = config.num_key_value_heads
241
+ self.num_key_value_groups = self.num_heads // self.num_key_value_heads
242
+ self.max_position_embeddings = config.max_position_embeddings
243
+ self.rope_theta = config.rope_theta
244
+
245
+ if (self.head_dim * self.num_heads) != self.hidden_size:
246
+ raise ValueError(
247
+ f"hidden_size must be divisible by num_heads (got `hidden_size`: {self.hidden_size}"
248
+ f" and `num_heads`: {self.num_heads})."
249
+ )
250
+ self.q_proj = nn.Linear(self.hidden_size, self.num_heads * self.head_dim, bias=config.attention_bias)
251
+ self.k_proj = nn.Linear(self.hidden_size, self.num_key_value_heads * self.head_dim, bias=config.attention_bias)
252
+ self.v_proj = nn.Linear(self.hidden_size, self.num_key_value_heads * self.head_dim, bias=config.attention_bias)
253
+ self.o_proj = nn.Linear(self.num_heads * self.head_dim, self.hidden_size, bias=config.attention_bias)
254
+ self._init_rope()
255
+
256
+ def _init_rope(self):
257
+ if self.config.rope_scaling is None:
258
+ self.rotary_emb = OrionRotaryEmbedding(
259
+ self.head_dim,
260
+ max_position_embeddings=self.max_position_embeddings,
261
+ base=self.rope_theta,
262
+ )
263
+ else:
264
+ scaling_type = self.config.rope_scaling["type"]
265
+ scaling_factor = self.config.rope_scaling["factor"]
266
+ if scaling_type == "linear":
267
+ self.rotary_emb = OrionLinearScalingRotaryEmbedding(
268
+ self.head_dim,
269
+ max_position_embeddings=self.max_position_embeddings,
270
+ scaling_factor=scaling_factor,
271
+ base=self.rope_theta,
272
+ )
273
+ elif scaling_type == "dynamic":
274
+ self.rotary_emb = OrionDynamicNTKScalingRotaryEmbedding(
275
+ self.head_dim,
276
+ max_position_embeddings=self.max_position_embeddings,
277
+ scaling_factor=scaling_factor,
278
+ base=self.rope_theta,
279
+ )
280
+ else:
281
+ raise ValueError(f"Unknown RoPE scaling type {scaling_type}")
282
+
283
+ def _shape(self, tensor: torch.Tensor, seq_len: int, bsz: int):
284
+ return tensor.view(bsz, seq_len, self.num_heads, self.head_dim).transpose(1, 2).contiguous()
285
+
286
+ def forward(
287
+ self,
288
+ hidden_states: torch.Tensor,
289
+ attention_mask: Optional[torch.Tensor] = None,
290
+ position_ids: Optional[torch.LongTensor] = None,
291
+ past_key_value: Optional[Tuple[torch.Tensor]] = None,
292
+ output_attentions: bool = False,
293
+ use_cache: bool = False,
294
+ padding_mask: Optional[torch.LongTensor] = None,
295
+ ) -> Tuple[torch.Tensor, Optional[torch.Tensor], Optional[Tuple[torch.Tensor]]]:
296
+ bsz, q_len, _ = hidden_states.size()
297
+
298
+ if self.config.pretraining_tp > 1:
299
+ key_value_slicing = (self.num_key_value_heads * self.head_dim) // self.config.pretraining_tp
300
+ query_slices = self.q_proj.weight.split(
301
+ (self.num_heads * self.head_dim) // self.config.pretraining_tp, dim=0
302
+ )
303
+ key_slices = self.k_proj.weight.split(key_value_slicing, dim=0)
304
+ value_slices = self.v_proj.weight.split(key_value_slicing, dim=0)
305
+
306
+ query_states = [F.linear(hidden_states, query_slices[i]) for i in range(self.config.pretraining_tp)]
307
+ query_states = torch.cat(query_states, dim=-1)
308
+
309
+ key_states = [F.linear(hidden_states, key_slices[i]) for i in range(self.config.pretraining_tp)]
310
+ key_states = torch.cat(key_states, dim=-1)
311
+
312
+ value_states = [F.linear(hidden_states, value_slices[i]) for i in range(self.config.pretraining_tp)]
313
+ value_states = torch.cat(value_states, dim=-1)
314
+
315
+ else:
316
+ query_states = self.q_proj(hidden_states)
317
+ key_states = self.k_proj(hidden_states)
318
+ value_states = self.v_proj(hidden_states)
319
+
320
+ query_states = query_states.view(bsz, q_len, self.num_heads, self.head_dim).transpose(1, 2)
321
+ key_states = key_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
322
+ value_states = value_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
323
+
324
+ kv_seq_len = key_states.shape[-2]
325
+ if past_key_value is not None:
326
+ kv_seq_len += past_key_value[0].shape[-2]
327
+ cos, sin = self.rotary_emb(value_states, seq_len=kv_seq_len)
328
+ query_states, key_states = apply_rotary_pos_emb(query_states, key_states, cos, sin, position_ids)
329
+
330
+ if past_key_value is not None:
331
+ # reuse k, v, self_attention
332
+ key_states = torch.cat([past_key_value[0], key_states], dim=2)
333
+ value_states = torch.cat([past_key_value[1], value_states], dim=2)
334
+
335
+ past_key_value = (key_states, value_states) if use_cache else None
336
+
337
+ key_states = repeat_kv(key_states, self.num_key_value_groups)
338
+ value_states = repeat_kv(value_states, self.num_key_value_groups)
339
+
340
+ attn_weights = torch.matmul(query_states, key_states.transpose(2, 3)) / math.sqrt(self.head_dim)
341
+
342
+ if attn_weights.size() != (bsz, self.num_heads, q_len, kv_seq_len):
343
+ raise ValueError(
344
+ f"Attention weights should be of size {(bsz, self.num_heads, q_len, kv_seq_len)}, but is"
345
+ f" {attn_weights.size()}"
346
+ )
347
+
348
+ if attention_mask is not None:
349
+ if attention_mask.size() != (bsz, 1, q_len, kv_seq_len):
350
+ raise ValueError(
351
+ f"Attention mask should be of size {(bsz, 1, q_len, kv_seq_len)}, but is {attention_mask.size()}"
352
+ )
353
+ attn_weights = attn_weights + attention_mask
354
+
355
+ # upcast attention to fp32
356
+ attn_weights = nn.functional.softmax(attn_weights, dim=-1, dtype=torch.float32).to(query_states.dtype)
357
+ attn_output = torch.matmul(attn_weights, value_states)
358
+
359
+ if attn_output.size() != (bsz, self.num_heads, q_len, self.head_dim):
360
+ raise ValueError(
361
+ f"`attn_output` should be of size {(bsz, self.num_heads, q_len, self.head_dim)}, but is"
362
+ f" {attn_output.size()}"
363
+ )
364
+
365
+ attn_output = attn_output.transpose(1, 2).contiguous()
366
+
367
+ attn_output = attn_output.reshape(bsz, q_len, self.hidden_size)
368
+
369
+ if self.config.pretraining_tp > 1:
370
+ attn_output = attn_output.split(self.hidden_size // self.config.pretraining_tp, dim=2)
371
+ o_proj_slices = self.o_proj.weight.split(self.hidden_size // self.config.pretraining_tp, dim=1)
372
+ attn_output = sum([F.linear(attn_output[i], o_proj_slices[i]) for i in range(self.config.pretraining_tp)])
373
+ else:
374
+ attn_output = self.o_proj(attn_output)
375
+
376
+ if not output_attentions:
377
+ attn_weights = None
378
+
379
+ return attn_output, attn_weights, past_key_value
380
+
381
+
382
+ class OrionFlashAttention2(OrionAttention):
383
+ """
384
+ Orion flash attention module. This module inherits from `OrionAttention` as the weights of the module stays
385
+ untouched. The only required change would be on the forward pass where it needs to correctly call the public API of
386
+ flash attention and deal with padding tokens in case the input contains any of them.
387
+ """
388
+
389
+ def forward(
390
+ self,
391
+ hidden_states: torch.Tensor,
392
+ attention_mask: Optional[torch.Tensor] = None,
393
+ position_ids: Optional[torch.LongTensor] = None,
394
+ past_key_value: Optional[Tuple[torch.Tensor]] = None,
395
+ output_attentions: bool = False,
396
+ use_cache: bool = False,
397
+ padding_mask: Optional[torch.LongTensor] = None,
398
+ ) -> Tuple[torch.Tensor, Optional[torch.Tensor], Optional[Tuple[torch.Tensor]]]:
399
+ # OrionFlashAttention2 attention does not support output_attentions
400
+ output_attentions = False
401
+
402
+ bsz, q_len, _ = hidden_states.size()
403
+
404
+ query_states = self.q_proj(hidden_states)
405
+ key_states = self.k_proj(hidden_states)
406
+ value_states = self.v_proj(hidden_states)
407
+
408
+ # Flash attention requires the input to have the shape
409
+ # batch_size x seq_length x head_dime x hidden_dim
410
+ # therefore we just need to keep the original shape
411
+ query_states = query_states.view(bsz, q_len, self.num_heads, self.head_dim).transpose(1, 2)
412
+ key_states = key_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
413
+ value_states = value_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
414
+
415
+ kv_seq_len = key_states.shape[-2]
416
+ if past_key_value is not None:
417
+ kv_seq_len += past_key_value[0].shape[-2]
418
+
419
+ cos, sin = self.rotary_emb(value_states, seq_len=kv_seq_len)
420
+
421
+ query_states, key_states = apply_rotary_pos_emb(query_states, key_states, cos, sin, position_ids)
422
+
423
+ if past_key_value is not None:
424
+ # reuse k, v, self_attention
425
+ key_states = torch.cat([past_key_value[0], key_states], dim=2)
426
+ value_states = torch.cat([past_key_value[1], value_states], dim=2)
427
+
428
+ past_key_value = (key_states, value_states) if use_cache else None
429
+
430
+ query_states = query_states.transpose(1, 2)
431
+ key_states = key_states.transpose(1, 2)
432
+ value_states = value_states.transpose(1, 2)
433
+
434
+ # TODO: llama does not have dropout in the config??
435
+ # It is recommended to use dropout with FA according to the docs
436
+ # when training.
437
+ dropout_rate = 0.0 # if not self.training else self.attn_dropout
438
+
439
+ # In PEFT, usually we cast the layer norms in float32 for training stability reasons
440
+ # therefore the input hidden states gets silently casted in float32. Hence, we need
441
+ # cast them back in float16 just to be sure everything works as expected.
442
+ # This might slowdown training & inference so it is recommended to not cast the LayerNorms
443
+ # in fp32. (LlamaRMSNorm handles it correctly)
444
+ input_dtype = query_states.dtype
445
+ if input_dtype == torch.float32:
446
+ logger.warning_once(
447
+ "The input hidden states seems to be silently casted in float32, this might be related to"
448
+ " the fact you have upcasted embedding or layer norm layers in float32. We will cast back the input in"
449
+ " float16."
450
+ )
451
+
452
+ query_states = query_states.to(torch.float16)
453
+ key_states = key_states.to(torch.float16)
454
+ value_states = value_states.to(torch.float16)
455
+
456
+ attn_output = self._flash_attention_forward(
457
+ query_states, key_states, value_states, padding_mask, q_len, dropout=dropout_rate
458
+ )
459
+
460
+ attn_output = attn_output.reshape(bsz, q_len, self.hidden_size).contiguous()
461
+ attn_output = self.o_proj(attn_output)
462
+
463
+ if not output_attentions:
464
+ attn_weights = None
465
+
466
+ return attn_output, attn_weights, past_key_value
467
+
468
+ def _flash_attention_forward(
469
+ self, query_states, key_states, value_states, padding_mask, query_length, dropout=0.0, softmax_scale=None
470
+ ):
471
+ """
472
+ Calls the forward method of Flash Attention - if the input hidden states contain at least one padding token
473
+ first unpad the input, then computes the attention scores and pad the final attention scores.
474
+
475
+ Args:
476
+ query_states (`torch.Tensor`):
477
+ Input query states to be passed to Flash Attention API
478
+ key_states (`torch.Tensor`):
479
+ Input key states to be passed to Flash Attention API
480
+ value_states (`torch.Tensor`):
481
+ Input value states to be passed to Flash Attention API
482
+ padding_mask (`torch.Tensor`):
483
+ The padding mask - corresponds to a tensor of size `(batch_size, seq_len)` where 0 stands for the
484
+ position of padding tokens and 1 for the position of non-padding tokens.
485
+ dropout (`int`, *optional*):
486
+ Attention dropout
487
+ softmax_scale (`float`, *optional*):
488
+ The scaling of QK^T before applying softmax. Default to 1 / sqrt(head_dim)
489
+ """
490
+ # Contains at least one padding token in the sequence
491
+ if padding_mask is not None:
492
+ batch_size = query_states.shape[0]
493
+ query_states, key_states, value_states, indices_q, cu_seq_lens, max_seq_lens = self._upad_input(
494
+ query_states, key_states, value_states, padding_mask, query_length
495
+ )
496
+
497
+ cu_seqlens_q, cu_seqlens_k = cu_seq_lens
498
+ max_seqlen_in_batch_q, max_seqlen_in_batch_k = max_seq_lens
499
+
500
+ attn_output_unpad = flash_attn_varlen_func(
501
+ query_states,
502
+ key_states,
503
+ value_states,
504
+ cu_seqlens_q=cu_seqlens_q,
505
+ cu_seqlens_k=cu_seqlens_k,
506
+ max_seqlen_q=max_seqlen_in_batch_q,
507
+ max_seqlen_k=max_seqlen_in_batch_k,
508
+ dropout_p=dropout,
509
+ softmax_scale=softmax_scale,
510
+ causal=True,
511
+ )
512
+
513
+ attn_output = pad_input(attn_output_unpad, indices_q, batch_size, query_length)
514
+ else:
515
+ attn_output = flash_attn_func(
516
+ query_states, key_states, value_states, dropout, softmax_scale=softmax_scale, causal=True
517
+ )
518
+
519
+ return attn_output
520
+
521
+ def _upad_input(self, query_layer, key_layer, value_layer, padding_mask, query_length):
522
+ indices_k, cu_seqlens_k, max_seqlen_in_batch_k = _get_unpad_data(padding_mask)
523
+ batch_size, kv_seq_len, num_key_value_heads, head_dim = key_layer.shape
524
+
525
+ key_layer = index_first_axis(
526
+ key_layer.reshape(batch_size * kv_seq_len, num_key_value_heads, head_dim), indices_k
527
+ )
528
+ value_layer = index_first_axis(
529
+ value_layer.reshape(batch_size * kv_seq_len, num_key_value_heads, head_dim), indices_k
530
+ )
531
+ if query_length == kv_seq_len:
532
+ query_layer = index_first_axis(
533
+ query_layer.reshape(batch_size * kv_seq_len, self.num_heads, head_dim), indices_k
534
+ )
535
+ cu_seqlens_q = cu_seqlens_k
536
+ max_seqlen_in_batch_q = max_seqlen_in_batch_k
537
+ indices_q = indices_k
538
+ elif query_length == 1:
539
+ max_seqlen_in_batch_q = 1
540
+ cu_seqlens_q = torch.arange(
541
+ batch_size + 1, dtype=torch.int32, device=query_layer.device
542
+ ) # There is a memcpy here, that is very bad.
543
+ indices_q = cu_seqlens_q[:-1]
544
+ query_layer = query_layer.squeeze(1)
545
+ else:
546
+ # The -q_len: slice assumes left padding.
547
+ padding_mask = padding_mask[:, -query_length:]
548
+ query_layer, indices_q, cu_seqlens_q, max_seqlen_in_batch_q = unpad_input(query_layer, padding_mask)
549
+
550
+ return (
551
+ query_layer,
552
+ key_layer,
553
+ value_layer,
554
+ indices_q,
555
+ (cu_seqlens_q, cu_seqlens_k),
556
+ (max_seqlen_in_batch_q, max_seqlen_in_batch_k),
557
+ )
558
+
559
+
560
+ class OrionDecoderLayer(nn.Module):
561
+ def __init__(self, config: OrionConfig):
562
+ super().__init__()
563
+ self.hidden_size = config.hidden_size
564
+ self.self_attn = (
565
+ OrionAttention(config=config)
566
+ if not getattr(config, "_flash_attn_2_enabled", False)
567
+ else OrionFlashAttention2(config=config)
568
+ )
569
+ self.mlp = OrionMLP(config)
570
+ self.input_layernorm = nn.LayerNorm(config.hidden_size, eps=config.rms_norm_eps)
571
+ self.post_attention_layernorm = nn.LayerNorm(config.hidden_size, eps=config.rms_norm_eps)
572
+
573
+ def forward(
574
+ self,
575
+ hidden_states: torch.Tensor,
576
+ attention_mask: Optional[torch.Tensor] = None,
577
+ position_ids: Optional[torch.LongTensor] = None,
578
+ past_key_value: Optional[Tuple[torch.Tensor]] = None,
579
+ output_attentions: Optional[bool] = False,
580
+ use_cache: Optional[bool] = False,
581
+ padding_mask: Optional[torch.LongTensor] = None,
582
+ ) -> Tuple[torch.FloatTensor, Optional[Tuple[torch.FloatTensor, torch.FloatTensor]]]:
583
+ """
584
+ Args:
585
+ hidden_states (`torch.FloatTensor`): input to the layer of shape `(batch, seq_len, embed_dim)`
586
+ attention_mask (`torch.FloatTensor`, *optional*): attention mask of size
587
+ `(batch, 1, tgt_len, src_len)` where padding elements are indicated by very large negative values.
588
+ output_attentions (`bool`, *optional*):
589
+ Whether or not to return the attentions tensors of all attention layers. See `attentions` under
590
+ returned tensors for more detail.
591
+ use_cache (`bool`, *optional*):
592
+ If set to `True`, `past_key_values` key value states are returned and can be used to speed up decoding
593
+ (see `past_key_values`).
594
+ past_key_value (`Tuple(torch.FloatTensor)`, *optional*): cached past key and value projection states
595
+ """
596
+
597
+ residual = hidden_states
598
+
599
+ hidden_states = self.input_layernorm(hidden_states)
600
+
601
+ # Self Attention
602
+ hidden_states, self_attn_weights, present_key_value = self.self_attn(
603
+ hidden_states=hidden_states,
604
+ attention_mask=attention_mask,
605
+ position_ids=position_ids,
606
+ past_key_value=past_key_value,
607
+ output_attentions=output_attentions,
608
+ use_cache=use_cache,
609
+ padding_mask=padding_mask,
610
+ )
611
+ hidden_states = residual + hidden_states
612
+
613
+ # Fully Connected
614
+ residual = hidden_states
615
+ hidden_states = self.post_attention_layernorm(hidden_states)
616
+ hidden_states = self.mlp(hidden_states)
617
+ hidden_states = residual + hidden_states
618
+
619
+ outputs = (hidden_states,)
620
+
621
+ if output_attentions:
622
+ outputs += (self_attn_weights,)
623
+
624
+ if use_cache:
625
+ outputs += (present_key_value,)
626
+
627
+ return outputs
628
+
629
+ class OrionPreTrainedModel(PreTrainedModel):
630
+ config_class = OrionConfig
631
+ base_model_prefix = "model"
632
+ supports_gradient_checkpointing = True
633
+ _no_split_modules = ["OrionDecoderLayer"]
634
+ _skip_keys_device_placement = "past_key_values"
635
+ _supports_flash_attn_2 = True
636
+
637
+ def _init_weights(self, module):
638
+ std = self.config.initializer_range
639
+ if isinstance(module, nn.Linear):
640
+ module.weight.data.normal_(mean=0.0, std=std)
641
+ if module.bias is not None:
642
+ module.bias.data.zero_()
643
+ elif isinstance(module, nn.Embedding):
644
+ module.weight.data.normal_(mean=0.0, std=std)
645
+ if module.padding_idx is not None:
646
+ module.weight.data[module.padding_idx].zero_()
647
+
648
+ def _set_gradient_checkpointing(self, module, value=False):
649
+ if isinstance(module, OrionModel):
650
+ module.gradient_checkpointing = value
651
+
652
+ class OrionModel(OrionPreTrainedModel):
653
+ """
654
+ Transformer decoder consisting of *config.num_hidden_layers* layers. Each layer is a [`OrionDecoderLayer`]
655
+
656
+ Args:
657
+ config: OrionConfig
658
+ """
659
+
660
+ def __init__(self, config: OrionConfig):
661
+ super().__init__(config)
662
+ self.padding_idx = config.pad_token_id
663
+ self.vocab_size = config.vocab_size
664
+
665
+ self.embed_tokens = nn.Embedding(config.vocab_size, config.hidden_size, self.padding_idx)
666
+ self.layers = nn.ModuleList([OrionDecoderLayer(config) for _ in range(config.num_hidden_layers)])
667
+ self.norm = nn.LayerNorm(config.hidden_size, eps=config.rms_norm_eps)
668
+
669
+ self.gradient_checkpointing = False
670
+ # Initialize weights and apply final processing
671
+ self.post_init()
672
+
673
+ def get_input_embeddings(self):
674
+ return self.embed_tokens
675
+
676
+ def set_input_embeddings(self, value):
677
+ self.embed_tokens = value
678
+
679
+ # Copied from transformers.models.bart.modeling_bart.BartDecoder._prepare_decoder_attention_mask
680
+ def _prepare_decoder_attention_mask(self, attention_mask, input_shape, inputs_embeds, past_key_values_length):
681
+ # create causal mask
682
+ # [bsz, seq_len] -> [bsz, 1, tgt_seq_len, src_seq_len]
683
+ combined_attention_mask = None
684
+ if input_shape[-1] > 1:
685
+ combined_attention_mask = _make_causal_mask(
686
+ input_shape,
687
+ inputs_embeds.dtype,
688
+ device=inputs_embeds.device,
689
+ past_key_values_length=past_key_values_length,
690
+ )
691
+
692
+ if attention_mask is not None:
693
+ # [bsz, seq_len] -> [bsz, 1, tgt_seq_len, src_seq_len]
694
+ expanded_attn_mask = _expand_mask(attention_mask, inputs_embeds.dtype, tgt_len=input_shape[-1]).to(
695
+ inputs_embeds.device
696
+ )
697
+ combined_attention_mask = (
698
+ expanded_attn_mask if combined_attention_mask is None else expanded_attn_mask + combined_attention_mask
699
+ )
700
+
701
+ return combined_attention_mask
702
+
703
+ def forward(
704
+ self,
705
+ input_ids: torch.LongTensor = None,
706
+ attention_mask: Optional[torch.Tensor] = None,
707
+ position_ids: Optional[torch.LongTensor] = None,
708
+ past_key_values: Optional[List[torch.FloatTensor]] = None,
709
+ inputs_embeds: Optional[torch.FloatTensor] = None,
710
+ use_cache: Optional[bool] = None,
711
+ output_attentions: Optional[bool] = None,
712
+ output_hidden_states: Optional[bool] = None,
713
+ return_dict: Optional[bool] = None,
714
+ ) -> Union[Tuple, BaseModelOutputWithPast]:
715
+ output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions
716
+ output_hidden_states = (
717
+ output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states
718
+ )
719
+ use_cache = use_cache if use_cache is not None else self.config.use_cache
720
+
721
+ return_dict = return_dict if return_dict is not None else self.config.use_return_dict
722
+
723
+ # retrieve input_ids and inputs_embeds
724
+ if input_ids is not None and inputs_embeds is not None:
725
+ raise ValueError("You cannot specify both input_ids and inputs_embeds at the same time")
726
+ elif input_ids is not None:
727
+ batch_size, seq_length = input_ids.shape
728
+ elif inputs_embeds is not None:
729
+ batch_size, seq_length, _ = inputs_embeds.shape
730
+ else:
731
+ raise ValueError("You have to specify either input_ids or inputs_embeds")
732
+
733
+ seq_length_with_past = seq_length
734
+ past_key_values_length = 0
735
+
736
+ if past_key_values is not None:
737
+ past_key_values_length = past_key_values[0][0].shape[2]
738
+ seq_length_with_past = seq_length_with_past + past_key_values_length
739
+
740
+ if position_ids is None:
741
+ device = input_ids.device if input_ids is not None else inputs_embeds.device
742
+ position_ids = torch.arange(
743
+ past_key_values_length, seq_length + past_key_values_length, dtype=torch.long, device=device
744
+ )
745
+ position_ids = position_ids.unsqueeze(0)
746
+
747
+ if inputs_embeds is None:
748
+ inputs_embeds = self.embed_tokens(input_ids)
749
+ # embed positions
750
+ if attention_mask is None:
751
+ attention_mask = torch.ones(
752
+ (batch_size, seq_length_with_past), dtype=torch.bool, device=inputs_embeds.device
753
+ )
754
+ padding_mask = None
755
+ else:
756
+ if 0 in attention_mask:
757
+ padding_mask = attention_mask
758
+ else:
759
+ padding_mask = None
760
+
761
+ attention_mask = self._prepare_decoder_attention_mask(
762
+ attention_mask, (batch_size, seq_length), inputs_embeds, past_key_values_length
763
+ )
764
+
765
+ hidden_states = inputs_embeds
766
+
767
+ if self.gradient_checkpointing and self.training:
768
+ if use_cache:
769
+ logger.warning_once(
770
+ "`use_cache=True` is incompatible with gradient checkpointing. Setting `use_cache=False`..."
771
+ )
772
+ use_cache = False
773
+
774
+ # decoder layers
775
+ all_hidden_states = () if output_hidden_states else None
776
+ all_self_attns = () if output_attentions else None
777
+ next_decoder_cache = () if use_cache else None
778
+
779
+ for idx, decoder_layer in enumerate(self.layers):
780
+ if output_hidden_states:
781
+ all_hidden_states += (hidden_states,)
782
+
783
+ past_key_value = past_key_values[idx] if past_key_values is not None else None
784
+
785
+ if self.gradient_checkpointing and self.training:
786
+
787
+ def create_custom_forward(module):
788
+ def custom_forward(*inputs):
789
+ # None for past_key_value
790
+ return module(*inputs, past_key_value, output_attentions, padding_mask=padding_mask)
791
+
792
+ return custom_forward
793
+
794
+ layer_outputs = torch.utils.checkpoint.checkpoint(
795
+ create_custom_forward(decoder_layer), hidden_states, attention_mask, position_ids
796
+ )
797
+ else:
798
+ layer_outputs = decoder_layer(
799
+ hidden_states,
800
+ attention_mask=attention_mask,
801
+ position_ids=position_ids,
802
+ past_key_value=past_key_value,
803
+ output_attentions=output_attentions,
804
+ use_cache=use_cache,
805
+ padding_mask=padding_mask,
806
+ )
807
+
808
+ hidden_states = layer_outputs[0]
809
+
810
+ if use_cache:
811
+ next_decoder_cache += (layer_outputs[2 if output_attentions else 1],)
812
+
813
+ if output_attentions:
814
+ all_self_attns += (layer_outputs[1],)
815
+
816
+ hidden_states = self.norm(hidden_states)
817
+
818
+ # add hidden states from the last decoder layer
819
+ if output_hidden_states:
820
+ all_hidden_states += (hidden_states,)
821
+
822
+ next_cache = next_decoder_cache if use_cache else None
823
+ if not return_dict:
824
+ return tuple(v for v in [hidden_states, next_cache, all_hidden_states, all_self_attns] if v is not None)
825
+ return BaseModelOutputWithPast(
826
+ last_hidden_state=hidden_states,
827
+ past_key_values=next_cache,
828
+ hidden_states=all_hidden_states,
829
+ attentions=all_self_attns,
830
+ )
831
+
832
+
833
+ class OrionForCausalLM(OrionPreTrainedModel):
834
+ model_type = "orion"
835
+ _tied_weights_keys = ["lm_head.weight"]
836
+
837
+ def __init__(self, config):
838
+ super().__init__(config)
839
+ self.model = OrionModel(config)
840
+ self.vocab_size = config.vocab_size
841
+ self.lm_head = nn.Linear(config.hidden_size, config.vocab_size, bias=False)
842
+
843
+ # Initialize weights and apply final processing
844
+ self.post_init()
845
+
846
+ def get_input_embeddings(self):
847
+ return self.model.embed_tokens
848
+
849
+ def set_input_embeddings(self, value):
850
+ self.model.embed_tokens = value
851
+
852
+ def get_output_embeddings(self):
853
+ return self.lm_head
854
+
855
+ def set_output_embeddings(self, new_embeddings):
856
+ self.lm_head = new_embeddings
857
+
858
+ def set_decoder(self, decoder):
859
+ self.model = decoder
860
+
861
+ def get_decoder(self):
862
+ return self.model
863
+
864
+ @replace_return_docstrings(output_type=CausalLMOutputWithPast, config_class=_CONFIG_FOR_DOC)
865
+ def forward(
866
+ self,
867
+ input_ids: torch.LongTensor = None,
868
+ attention_mask: Optional[torch.Tensor] = None,
869
+ position_ids: Optional[torch.LongTensor] = None,
870
+ past_key_values: Optional[List[torch.FloatTensor]] = None,
871
+ inputs_embeds: Optional[torch.FloatTensor] = None,
872
+ labels: Optional[torch.LongTensor] = None,
873
+ use_cache: Optional[bool] = None,
874
+ output_attentions: Optional[bool] = None,
875
+ output_hidden_states: Optional[bool] = None,
876
+ return_dict: Optional[bool] = None,
877
+ ) -> Union[Tuple, CausalLMOutputWithPast]:
878
+ r"""
879
+ Args:
880
+ labels (`torch.LongTensor` of shape `(batch_size, sequence_length)`, *optional*):
881
+ Labels for computing the masked language modeling loss. Indices should either be in `[0, ...,
882
+ config.vocab_size]` or -100 (see `input_ids` docstring). Tokens with indices set to `-100` are ignored
883
+ (masked), the loss is only computed for the tokens with labels in `[0, ..., config.vocab_size]`.
884
+
885
+ Returns:
886
+
887
+ Example:
888
+
889
+ ```python
890
+ >>> from transformers import AutoTokenizer, OrionForCausalLM
891
+
892
+ >>> model = OrionForCausalLM.from_pretrained(PATH_TO_CONVERTED_WEIGHTS)
893
+ >>> tokenizer = AutoTokenizer.from_pretrained(PATH_TO_CONVERTED_TOKENIZER)
894
+
895
+ >>> prompt = "Hey, are you conscious? Can you talk to me?"
896
+ >>> inputs = tokenizer(prompt, return_tensors="pt")
897
+
898
+ >>> # Generate
899
+ >>> generate_ids = model.generate(inputs.input_ids, max_length=30)
900
+ >>> tokenizer.batch_decode(generate_ids, skip_special_tokens=True, clean_up_tokenization_spaces=False)[0]
901
+ "Hey, are you conscious? Can you talk to me?\nI'm not conscious, but I can talk to you."
902
+ ```"""
903
+
904
+ output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions
905
+ output_hidden_states = (
906
+ output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states
907
+ )
908
+ return_dict = return_dict if return_dict is not None else self.config.use_return_dict
909
+
910
+ # decoder outputs consists of (dec_features, layer_state, dec_hidden, dec_attn)
911
+ outputs = self.model(
912
+ input_ids=input_ids,
913
+ attention_mask=attention_mask,
914
+ position_ids=position_ids,
915
+ past_key_values=past_key_values,
916
+ inputs_embeds=inputs_embeds,
917
+ use_cache=use_cache,
918
+ output_attentions=output_attentions,
919
+ output_hidden_states=output_hidden_states,
920
+ return_dict=return_dict,
921
+ )
922
+
923
+ hidden_states = outputs[0]
924
+ if self.config.pretraining_tp > 1:
925
+ lm_head_slices = self.lm_head.weight.split(self.vocab_size // self.config.pretraining_tp, dim=0)
926
+ logits = [F.linear(hidden_states, lm_head_slices[i]) for i in range(self.config.pretraining_tp)]
927
+ logits = torch.cat(logits, dim=-1)
928
+ else:
929
+ logits = self.lm_head(hidden_states)
930
+ logits = logits.float()
931
+
932
+ loss = None
933
+ if labels is not None:
934
+ # Shift so that tokens < n predict n
935
+ shift_logits = logits[..., :-1, :].contiguous()
936
+ shift_labels = labels[..., 1:].contiguous()
937
+ # Flatten the tokens
938
+ loss_fct = CrossEntropyLoss()
939
+ shift_logits = shift_logits.view(-1, self.config.vocab_size)
940
+ shift_labels = shift_labels.view(-1)
941
+ # Enable model parallelism
942
+ shift_labels = shift_labels.to(shift_logits.device)
943
+ loss = loss_fct(shift_logits, shift_labels)
944
+
945
+ if not return_dict:
946
+ output = (logits,) + outputs[1:]
947
+ return (loss,) + output if loss is not None else output
948
+
949
+ return CausalLMOutputWithPast(
950
+ loss=loss,
951
+ logits=logits,
952
+ past_key_values=outputs.past_key_values,
953
+ hidden_states=outputs.hidden_states,
954
+ attentions=outputs.attentions,
955
+ )
956
+
957
+ def chat(self, tokenizer, messages: List[dict], streaming=False,generation_config: Optional[GenerationConfig]=None):
958
+ generation_config = generation_config or self.generation_config
959
+ input_tokens = build_chat_input(tokenizer,messages)
960
+ input_ids = torch.LongTensor([input_tokens]).to(self.device)
961
+
962
+ if streaming:
963
+ streamer = TextIterStreamer(tokenizer, skip_prompt=True, skip_special_tokens=True)
964
+ Thread(target=self.generate, kwargs=dict(
965
+ inputs=input_ids, streamer=streamer,
966
+ generation_config=generation_config,
967
+ )).start()
968
+ return streamer
969
+ else:
970
+ outputs = self.generate(input_ids, generation_config=generation_config)
971
+ response = tokenizer.decode(outputs[0][len(input_ids[0]):], skip_special_tokens=True)
972
+ return response
973
+
974
+ def prepare_inputs_for_generation(
975
+ self, input_ids, past_key_values=None, attention_mask=None, inputs_embeds=None, **kwargs
976
+ ):
977
+ if past_key_values:
978
+ input_ids = input_ids[:, -1:]
979
+
980
+ position_ids = kwargs.get("position_ids", None)
981
+ if attention_mask is not None and position_ids is None:
982
+ # create position_ids on the fly for batch generation
983
+ position_ids = attention_mask.long().cumsum(-1) - 1
984
+ position_ids.masked_fill_(attention_mask == 0, 1)
985
+ if past_key_values:
986
+ position_ids = position_ids[:, -1].unsqueeze(-1)
987
+
988
+ # if `inputs_embeds` are passed, we only want to use them in the 1st generation step
989
+ if inputs_embeds is not None and past_key_values is None:
990
+ model_inputs = {"inputs_embeds": inputs_embeds}
991
+ else:
992
+ model_inputs = {"input_ids": input_ids}
993
+
994
+ model_inputs.update(
995
+ {
996
+ "position_ids": position_ids,
997
+ "past_key_values": past_key_values,
998
+ "use_cache": kwargs.get("use_cache"),
999
+ "attention_mask": attention_mask,
1000
+ }
1001
+ )
1002
+ return model_inputs
1003
+
1004
+ @staticmethod
1005
+ def _reorder_cache(past_key_values, beam_idx):
1006
+ reordered_past = ()
1007
+ for layer_past in past_key_values:
1008
+ reordered_past += (
1009
+ tuple(past_state.index_select(0, beam_idx.to(past_state.device)) for past_state in layer_past),
1010
+ )
1011
+ return reordered_past
1012
+
1013
+ class OrionForSequenceClassification(OrionPreTrainedModel):
1014
+ def __init__(self, config):
1015
+ super().__init__(config)
1016
+ self.num_labels = config.num_labels
1017
+ self.model = OrionModel(config)
1018
+ self.score = nn.Linear(config.hidden_size, self.num_labels, bias=False)
1019
+
1020
+ # Initialize weights and apply final processing
1021
+ self.post_init()
1022
+
1023
+ def get_input_embeddings(self):
1024
+ return self.model.embed_tokens
1025
+
1026
+ def set_input_embeddings(self, value):
1027
+ self.model.embed_tokens = value
1028
+
1029
+ def forward(
1030
+ self,
1031
+ input_ids: torch.LongTensor = None,
1032
+ attention_mask: Optional[torch.Tensor] = None,
1033
+ position_ids: Optional[torch.LongTensor] = None,
1034
+ past_key_values: Optional[List[torch.FloatTensor]] = None,
1035
+ inputs_embeds: Optional[torch.FloatTensor] = None,
1036
+ labels: Optional[torch.LongTensor] = None,
1037
+ use_cache: Optional[bool] = None,
1038
+ output_attentions: Optional[bool] = None,
1039
+ output_hidden_states: Optional[bool] = None,
1040
+ return_dict: Optional[bool] = None,
1041
+ ) -> Union[Tuple, SequenceClassifierOutputWithPast]:
1042
+ r"""
1043
+ labels (`torch.LongTensor` of shape `(batch_size,)`, *optional*):
1044
+ Labels for computing the sequence classification/regression loss. Indices should be in `[0, ...,
1045
+ config.num_labels - 1]`. If `config.num_labels == 1` a regression loss is computed (Mean-Square loss), If
1046
+ `config.num_labels > 1` a classification loss is computed (Cross-Entropy).
1047
+ """
1048
+ return_dict = return_dict if return_dict is not None else self.config.use_return_dict
1049
+
1050
+ transformer_outputs = self.model(
1051
+ input_ids,
1052
+ attention_mask=attention_mask,
1053
+ position_ids=position_ids,
1054
+ past_key_values=past_key_values,
1055
+ inputs_embeds=inputs_embeds,
1056
+ use_cache=use_cache,
1057
+ output_attentions=output_attentions,
1058
+ output_hidden_states=output_hidden_states,
1059
+ return_dict=return_dict,
1060
+ )
1061
+ hidden_states = transformer_outputs[0]
1062
+ logits = self.score(hidden_states)
1063
+
1064
+ if input_ids is not None:
1065
+ batch_size = input_ids.shape[0]
1066
+ else:
1067
+ batch_size = inputs_embeds.shape[0]
1068
+
1069
+ if self.config.pad_token_id is None and batch_size != 1:
1070
+ raise ValueError("Cannot handle batch sizes > 1 if no padding token is defined.")
1071
+ if self.config.pad_token_id is None:
1072
+ sequence_lengths = -1
1073
+ else:
1074
+ if input_ids is not None:
1075
+ sequence_lengths = (torch.eq(input_ids, self.config.pad_token_id).long().argmax(-1) - 1).to(
1076
+ logits.device
1077
+ )
1078
+ else:
1079
+ sequence_lengths = -1
1080
+
1081
+ pooled_logits = logits[torch.arange(batch_size, device=logits.device), sequence_lengths]
1082
+
1083
+ loss = None
1084
+ if labels is not None:
1085
+ labels = labels.to(logits.device)
1086
+ if self.config.problem_type is None:
1087
+ if self.num_labels == 1:
1088
+ self.config.problem_type = "regression"
1089
+ elif self.num_labels > 1 and (labels.dtype == torch.long or labels.dtype == torch.int):
1090
+ self.config.problem_type = "single_label_classification"
1091
+ else:
1092
+ self.config.problem_type = "multi_label_classification"
1093
+
1094
+ if self.config.problem_type == "regression":
1095
+ loss_fct = MSELoss()
1096
+ if self.num_labels == 1:
1097
+ loss = loss_fct(pooled_logits.squeeze(), labels.squeeze())
1098
+ else:
1099
+ loss = loss_fct(pooled_logits, labels)
1100
+ elif self.config.problem_type == "single_label_classification":
1101
+ loss_fct = CrossEntropyLoss()
1102
+ loss = loss_fct(pooled_logits.view(-1, self.num_labels), labels.view(-1))
1103
+ elif self.config.problem_type == "multi_label_classification":
1104
+ loss_fct = BCEWithLogitsLoss()
1105
+ loss = loss_fct(pooled_logits, labels)
1106
+ if not return_dict:
1107
+ output = (pooled_logits,) + transformer_outputs[1:]
1108
+ return ((loss,) + output) if loss is not None else output
1109
+
1110
+ return SequenceClassifierOutputWithPast(
1111
+ loss=loss,
1112
+ logits=pooled_logits,
1113
+ past_key_values=transformer_outputs.past_key_values,
1114
+ hidden_states=transformer_outputs.hidden_states,
1115
+ attentions=transformer_outputs.attentions,
1116
+ )
1117
+