Update modeling_Llamoe.py
Browse files- modeling_Llamoe.py +133 -162
modeling_Llamoe.py
CHANGED
|
@@ -33,10 +33,9 @@ from transformers.utils import (
|
|
| 33 |
replace_return_docstrings,
|
| 34 |
)
|
| 35 |
from transformers.utils.import_utils import is_torch_fx_available
|
| 36 |
-
from .
|
| 37 |
|
| 38 |
from math import sqrt as math_sqrt
|
| 39 |
-
_CONFIG_FOR_DOC = "LlamoeConfig"
|
| 40 |
|
| 41 |
|
| 42 |
if is_flash_attn_2_available():
|
|
@@ -53,8 +52,10 @@ if is_torch_fx_available():
|
|
| 53 |
|
| 54 |
_prepare_4d_causal_attention_mask = torch.fx.wrap(_prepare_4d_causal_attention_mask)
|
| 55 |
|
| 56 |
-
|
| 57 |
-
|
|
|
|
|
|
|
| 58 |
|
| 59 |
def load_balancing_loss_func(
|
| 60 |
gate_logits: torch.Tensor, num_experts: torch.Tensor = None, top_k=2, attention_mask: Optional[torch.Tensor] = None
|
|
@@ -130,36 +131,40 @@ def load_balancing_loss_func(
|
|
| 130 |
|
| 131 |
|
| 132 |
|
|
|
|
|
|
|
|
|
|
| 133 |
def _get_unpad_data(attention_mask):
|
| 134 |
seqlens_in_batch = attention_mask.sum(dim=-1, dtype=torch.int32)
|
| 135 |
indices = torch.nonzero(attention_mask.flatten(), as_tuple=False).flatten()
|
| 136 |
max_seqlen_in_batch = seqlens_in_batch.max().item()
|
| 137 |
-
cu_seqlens = F.pad(torch.cumsum(seqlens_in_batch, dim=0, dtype=torch.int32), (1, 0))
|
| 138 |
return (
|
| 139 |
indices,
|
| 140 |
cu_seqlens,
|
| 141 |
max_seqlen_in_batch,
|
| 142 |
)
|
| 143 |
|
|
|
|
|
|
|
| 144 |
class LlamoeRMSNorm(nn.Module):
|
| 145 |
-
def __init__(self,
|
| 146 |
-
"""
|
| 147 |
-
LlamaRMSNorm is equivalent to T5LayerNorm
|
| 148 |
-
"""
|
| 149 |
super().__init__()
|
| 150 |
-
self.
|
| 151 |
-
self.
|
| 152 |
-
|
| 153 |
-
def forward(self, hidden_states):
|
| 154 |
-
input_dtype = hidden_states.dtype
|
| 155 |
-
hidden_states = hidden_states.to(torch.float32)
|
| 156 |
-
variance = hidden_states.pow(2).mean(-1, keepdim=True)
|
| 157 |
-
hidden_states = hidden_states * torch.rsqrt(variance + self.variance_epsilon)
|
| 158 |
-
return self.weight * hidden_states.to(input_dtype)
|
| 159 |
|
|
|
|
|
|
|
|
|
|
|
|
|
| 160 |
|
| 161 |
-
|
|
|
|
|
|
|
|
|
|
|
|
|
| 162 |
|
|
|
|
| 163 |
|
| 164 |
class LlamoeRotaryEmbedding(nn.Module):
|
| 165 |
def __init__(self, dim, max_position_embeddings=2048, base=10000, device=None):
|
|
@@ -205,63 +210,8 @@ def apply_rotary_pos_emb(q, k, cos, sin, position_ids=None, unsqueeze_dim=1):
|
|
| 205 |
k_embed = (k * cos) + (rotate_half(k) * sin)
|
| 206 |
return q_embed, k_embed
|
| 207 |
|
| 208 |
-
|
| 209 |
-
|
| 210 |
-
class LlamoeBlockSparseTop2MLP(nn.Module):
|
| 211 |
-
def __init__(self, config: LlamoeConfig):
|
| 212 |
-
super().__init__()
|
| 213 |
-
self.ffn_dim = config.intermediate_size
|
| 214 |
-
self.hidden_dim = config.hidden_size
|
| 215 |
-
|
| 216 |
-
self.w1 = nn.Linear(self.hidden_dim, self.ffn_dim, bias=False)
|
| 217 |
-
self.w2 = nn.Linear(self.ffn_dim, self.hidden_dim, bias=False)
|
| 218 |
-
self.w3 = nn.Linear(self.hidden_dim, self.ffn_dim, bias=False)
|
| 219 |
-
|
| 220 |
-
self.act_fn = approx_gelu
|
| 221 |
-
|
| 222 |
-
def forward(self, hidden_states):
|
| 223 |
-
current_hidden_states = self.act_fn(self.w1(hidden_states)) * self.w3(hidden_states)
|
| 224 |
-
current_hidden_states = self.w2(current_hidden_states)
|
| 225 |
-
return current_hidden_states.to(hidden_states.dtype)
|
| 226 |
-
|
| 227 |
-
class LlamoeSparseMoeBlock(nn.Module):
|
| 228 |
-
def __init__(self, config):
|
| 229 |
-
super().__init__()
|
| 230 |
-
self.hidden_dim = config.hidden_size
|
| 231 |
-
self.ffn_dim = config.intermediate_size
|
| 232 |
-
self.num_experts = config.num_local_experts
|
| 233 |
-
self.top_k = 2
|
| 234 |
-
|
| 235 |
-
# gating
|
| 236 |
-
self.gate = nn.Linear(self.hidden_dim, self.num_experts, bias=False)
|
| 237 |
-
|
| 238 |
-
self.experts = nn.ModuleList([LlamoeBlockSparseTop2MLP(config) for _ in range(self.num_experts)])
|
| 239 |
-
|
| 240 |
-
def forward(self, hidden_states: torch.Tensor) -> Tuple[torch.Tensor, torch.Tensor]:
|
| 241 |
-
batch_size, sequence_length, hidden_dim = hidden_states.shape
|
| 242 |
-
hidden_states = hidden_states.view(-1, hidden_dim)
|
| 243 |
-
|
| 244 |
-
# router_logits: (batch * sequence_length, n_experts)
|
| 245 |
-
router_logits = self.gate(hidden_states)
|
| 246 |
-
routing_weights = F.softmax(router_logits, dim=1)
|
| 247 |
-
topk_weight, topk_idx = torch.topk(routing_weights, self.top_k, dim=-1, sorted=False)
|
| 248 |
-
topk_weight /= topk_weight.sum(dim=-1, keepdim=True)
|
| 249 |
-
|
| 250 |
-
hidden_states = hidden_states.repeat_interleave(self.top_k, dim=0)
|
| 251 |
-
|
| 252 |
-
y = torch.empty_like(hidden_states)
|
| 253 |
-
|
| 254 |
-
flat_topk_idx = topk_idx.view(-1)
|
| 255 |
-
for i in range(self.num_experts):
|
| 256 |
-
expert = self.experts[i]
|
| 257 |
-
expert_output = expert(hidden_states[flat_topk_idx == i])
|
| 258 |
-
y[flat_topk_idx == i] = expert_output
|
| 259 |
-
|
| 260 |
-
y = (y.view(*topk_weight.shape, -1) * topk_weight.unsqueeze(-1)).sum(dim=1)
|
| 261 |
-
|
| 262 |
-
final_hidden_states = y.reshape(batch_size, sequence_length, hidden_dim)
|
| 263 |
-
return final_hidden_states.to(hidden_states.dtype), router_logits.to(hidden_states.dtype)
|
| 264 |
-
|
| 265 |
def repeat_kv(hidden_states: torch.Tensor, n_rep: int) -> torch.Tensor:
|
| 266 |
"""
|
| 267 |
This is the equivalent of torch.repeat_interleave(x, dim=1, repeats=n_rep). The hidden states go from (batch,
|
|
@@ -273,10 +223,10 @@ def repeat_kv(hidden_states: torch.Tensor, n_rep: int) -> torch.Tensor:
|
|
| 273 |
hidden_states = hidden_states[:, :, None, :, :].expand(batch, num_key_value_heads, n_rep, slen, head_dim)
|
| 274 |
return hidden_states.reshape(batch, num_key_value_heads * n_rep, slen, head_dim)
|
| 275 |
|
| 276 |
-
|
| 277 |
class LlamoeAttention(nn.Module):
|
| 278 |
"""Multi-headed attention from 'Attention Is All You Need' paper"""
|
| 279 |
|
|
|
|
| 280 |
def __init__(self, config: LlamoeConfig, layer_idx: Optional[int] = None):
|
| 281 |
super().__init__()
|
| 282 |
self.config = config
|
|
@@ -291,14 +241,14 @@ class LlamoeAttention(nn.Module):
|
|
| 291 |
self.attention_dropout = config.attention_dropout
|
| 292 |
self.hidden_size = config.hidden_size
|
| 293 |
self.num_heads = config.num_attention_heads
|
| 294 |
-
self.head_dim =
|
| 295 |
self.num_key_value_heads = config.num_key_value_heads
|
| 296 |
self.num_key_value_groups = self.num_heads // self.num_key_value_heads
|
| 297 |
self.max_position_embeddings = config.max_position_embeddings
|
| 298 |
self.rope_theta = config.rope_theta
|
| 299 |
self.is_causal = True
|
| 300 |
|
| 301 |
-
if
|
| 302 |
raise ValueError(
|
| 303 |
f"hidden_size must be divisible by num_heads (got `hidden_size`: {self.hidden_size}"
|
| 304 |
f" and `num_heads`: {self.num_heads})."
|
|
@@ -307,19 +257,12 @@ class LlamoeAttention(nn.Module):
|
|
| 307 |
self.q_proj = nn.Linear(self.hidden_size, self.num_heads * self.head_dim, bias=config.attention_bias)
|
| 308 |
self.k_proj = nn.Linear(self.hidden_size, self.num_key_value_heads * self.head_dim, bias=config.attention_bias)
|
| 309 |
self.v_proj = nn.Linear(self.hidden_size, self.num_key_value_heads * self.head_dim, bias=config.attention_bias)
|
| 310 |
-
self.o_proj = nn.Linear(self.
|
| 311 |
-
self.
|
| 312 |
-
|
| 313 |
-
|
| 314 |
-
|
| 315 |
-
|
| 316 |
-
self.head_dim,
|
| 317 |
-
max_position_embeddings=self.max_position_embeddings,
|
| 318 |
-
base=self.rope_theta,
|
| 319 |
-
)
|
| 320 |
-
|
| 321 |
-
else:
|
| 322 |
-
raise ValueError(f"Unknown RoPE scaling type {scaling_type}")
|
| 323 |
|
| 324 |
def forward(
|
| 325 |
self,
|
|
@@ -334,35 +277,17 @@ class LlamoeAttention(nn.Module):
|
|
| 334 |
) -> Tuple[torch.Tensor, Optional[torch.Tensor], Optional[Tuple[torch.Tensor]]]:
|
| 335 |
bsz, q_len, _ = hidden_states.size()
|
| 336 |
|
| 337 |
-
|
| 338 |
-
|
| 339 |
-
|
| 340 |
-
(self.num_heads * self.head_dim) // self.config.pretraining_tp, dim=0
|
| 341 |
-
)
|
| 342 |
-
key_slices = self.k_proj.weight.split(key_value_slicing, dim=0)
|
| 343 |
-
value_slices = self.v_proj.weight.split(key_value_slicing, dim=0)
|
| 344 |
-
|
| 345 |
-
query_states = [F.linear(hidden_states, query_slices[i]) for i in range(self.config.pretraining_tp)]
|
| 346 |
-
query_states = torch.cat(query_states, dim=-1)
|
| 347 |
-
|
| 348 |
-
key_states = [F.linear(hidden_states, key_slices[i]) for i in range(self.config.pretraining_tp)]
|
| 349 |
-
key_states = torch.cat(key_states, dim=-1)
|
| 350 |
-
|
| 351 |
-
value_states = [F.linear(hidden_states, value_slices[i]) for i in range(self.config.pretraining_tp)]
|
| 352 |
-
value_states = torch.cat(value_states, dim=-1)
|
| 353 |
-
|
| 354 |
-
else:
|
| 355 |
-
query_states = self.q_proj(hidden_states)
|
| 356 |
-
key_states = self.k_proj(hidden_states)
|
| 357 |
-
value_states = self.v_proj(hidden_states)
|
| 358 |
|
| 359 |
query_states = query_states.view(bsz, q_len, self.num_heads, self.head_dim).transpose(1, 2)
|
| 360 |
key_states = key_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
|
| 361 |
value_states = value_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
|
| 362 |
|
| 363 |
past_key_value = getattr(self, "past_key_value", past_key_value)
|
| 364 |
-
cos, sin = self.rotary_emb(value_states, position_ids)
|
| 365 |
-
query_states, key_states = apply_rotary_pos_emb(query_states, key_states, cos, sin)
|
| 366 |
|
| 367 |
if past_key_value is not None:
|
| 368 |
# sin and cos are specific to RoPE models; cache_position needed for the static cache
|
|
@@ -375,9 +300,10 @@ class LlamoeAttention(nn.Module):
|
|
| 375 |
attn_weights = torch.matmul(query_states, key_states.transpose(2, 3)) / math.sqrt(self.head_dim)
|
| 376 |
|
| 377 |
if attention_mask is not None: # no matter the length, we just slice it
|
| 378 |
-
causal_mask = attention_mask
|
| 379 |
if cache_position is not None:
|
| 380 |
causal_mask = attention_mask[:, :, cache_position, : key_states.shape[-2]]
|
|
|
|
|
|
|
| 381 |
attn_weights = attn_weights + causal_mask
|
| 382 |
|
| 383 |
# upcast attention to fp32
|
|
@@ -393,14 +319,8 @@ class LlamoeAttention(nn.Module):
|
|
| 393 |
|
| 394 |
attn_output = attn_output.transpose(1, 2).contiguous()
|
| 395 |
|
| 396 |
-
attn_output = attn_output.
|
| 397 |
-
|
| 398 |
-
if self.config.pretraining_tp > 1:
|
| 399 |
-
attn_output = attn_output.split(self.hidden_size // self.config.pretraining_tp, dim=2)
|
| 400 |
-
o_proj_slices = self.o_proj.weight.split(self.hidden_size // self.config.pretraining_tp, dim=1)
|
| 401 |
-
attn_output = sum([F.linear(attn_output[i], o_proj_slices[i]) for i in range(self.config.pretraining_tp)])
|
| 402 |
-
else:
|
| 403 |
-
attn_output = self.o_proj(attn_output)
|
| 404 |
|
| 405 |
if not output_attentions:
|
| 406 |
attn_weights = None
|
|
@@ -408,9 +328,10 @@ class LlamoeAttention(nn.Module):
|
|
| 408 |
return attn_output, attn_weights, past_key_value
|
| 409 |
|
| 410 |
|
| 411 |
-
|
|
|
|
| 412 |
"""
|
| 413 |
-
|
| 414 |
untouched. The only required change would be on the forward pass where it needs to correctly call the public API of
|
| 415 |
flash attention and deal with padding tokens in case the input contains any of them.
|
| 416 |
"""
|
|
@@ -423,6 +344,7 @@ class LlamoeFlashAttention2(LlamoeAttention):
|
|
| 423 |
# 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).
|
| 424 |
self._flash_attn_uses_top_left_mask = not is_flash_attn_greater_or_equal_2_10()
|
| 425 |
|
|
|
|
| 426 |
def forward(
|
| 427 |
self,
|
| 428 |
hidden_states: torch.Tensor,
|
|
@@ -449,8 +371,8 @@ class LlamoeFlashAttention2(LlamoeAttention):
|
|
| 449 |
key_states = key_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
|
| 450 |
value_states = value_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
|
| 451 |
|
| 452 |
-
cos, sin = self.rotary_emb(value_states, position_ids)
|
| 453 |
-
query_states, key_states = apply_rotary_pos_emb(query_states, key_states, cos, sin)
|
| 454 |
|
| 455 |
past_key_value = getattr(self, "past_key_value", past_key_value)
|
| 456 |
|
|
@@ -471,7 +393,7 @@ class LlamoeFlashAttention2(LlamoeAttention):
|
|
| 471 |
# therefore the input hidden states gets silently casted in float32. Hence, we need
|
| 472 |
# cast them back in the correct dtype just to be sure everything works as expected.
|
| 473 |
# This might slowdown training & inference so it is recommended to not cast the LayerNorms
|
| 474 |
-
# in fp32. (
|
| 475 |
|
| 476 |
input_dtype = query_states.dtype
|
| 477 |
if input_dtype == torch.float32:
|
|
@@ -497,7 +419,7 @@ class LlamoeFlashAttention2(LlamoeAttention):
|
|
| 497 |
query_states, key_states, value_states, attention_mask, q_len, dropout=dropout_rate
|
| 498 |
)
|
| 499 |
|
| 500 |
-
attn_output = attn_output.reshape(bsz, q_len,
|
| 501 |
attn_output = self.o_proj(attn_output)
|
| 502 |
|
| 503 |
if not output_attentions:
|
|
@@ -511,7 +433,6 @@ class LlamoeFlashAttention2(LlamoeAttention):
|
|
| 511 |
"""
|
| 512 |
Calls the forward method of Flash Attention - if the input hidden states contain at least one padding token
|
| 513 |
first unpad the input, then computes the attention scores and pad the final attention scores.
|
| 514 |
-
|
| 515 |
Args:
|
| 516 |
query_states (`torch.Tensor`):
|
| 517 |
Input query states to be passed to Flash Attention API
|
|
@@ -530,7 +451,7 @@ class LlamoeFlashAttention2(LlamoeAttention):
|
|
| 530 |
if not self._flash_attn_uses_top_left_mask:
|
| 531 |
causal = self.is_causal
|
| 532 |
else:
|
| 533 |
-
# TODO: Remove the `query_length != 1` check once Flash Attention for RoCm is bumped to 2.1. For details, please see the comment in
|
| 534 |
causal = self.is_causal and query_length != 1
|
| 535 |
|
| 536 |
# Contains at least one padding token in the sequence
|
|
@@ -603,6 +524,7 @@ class LlamoeFlashAttention2(LlamoeAttention):
|
|
| 603 |
)
|
| 604 |
|
| 605 |
|
|
|
|
| 606 |
class LlamoeSdpaAttention(LlamoeAttention):
|
| 607 |
"""
|
| 608 |
Gemmoe attention module using torch.nn.functional.scaled_dot_product_attention. This module inherits from
|
|
@@ -624,7 +546,7 @@ class LlamoeSdpaAttention(LlamoeAttention):
|
|
| 624 |
if output_attentions:
|
| 625 |
# TODO: Improve this warning with e.g. `model.config.attn_implementation = "manual"` once this is implemented.
|
| 626 |
logger.warning_once(
|
| 627 |
-
"
|
| 628 |
'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.'
|
| 629 |
)
|
| 630 |
return super().forward(
|
|
@@ -660,9 +582,9 @@ class LlamoeSdpaAttention(LlamoeAttention):
|
|
| 660 |
key_states = repeat_kv(key_states, self.num_key_value_groups)
|
| 661 |
value_states = repeat_kv(value_states, self.num_key_value_groups)
|
| 662 |
|
| 663 |
-
|
| 664 |
-
|
| 665 |
-
|
| 666 |
|
| 667 |
# SDPA with memory-efficient backend is currently (torch==2.1.2) bugged with non-contiguous inputs with custom attn_mask,
|
| 668 |
# Reference: https://github.com/pytorch/pytorch/issues/112577.
|
|
@@ -671,11 +593,6 @@ class LlamoeSdpaAttention(LlamoeAttention):
|
|
| 671 |
key_states = key_states.contiguous()
|
| 672 |
value_states = value_states.contiguous()
|
| 673 |
|
| 674 |
-
print("query:",query_states.shape)
|
| 675 |
-
print("keys:",key_states.shape)
|
| 676 |
-
print("values:",value_states.shape)
|
| 677 |
-
print("causal_mask:",causal_mask.shape)
|
| 678 |
-
|
| 679 |
attn_output = torch.nn.functional.scaled_dot_product_attention(
|
| 680 |
query_states,
|
| 681 |
key_states,
|
|
@@ -690,23 +607,80 @@ class LlamoeSdpaAttention(LlamoeAttention):
|
|
| 690 |
attn_output = self.o_proj(attn_output)
|
| 691 |
|
| 692 |
return attn_output, None, past_key_value
|
| 693 |
-
|
| 694 |
|
| 695 |
LLAMOE_ATTENTION_CLASSES = {
|
| 696 |
"eager": LlamoeAttention,
|
| 697 |
"flash_attention_2": LlamoeFlashAttention2,
|
| 698 |
-
"sdpa": LlamoeSdpaAttention
|
| 699 |
}
|
| 700 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 701 |
|
|
|
|
|
|
|
| 702 |
class LlamoeDecoderLayer(nn.Module):
|
| 703 |
def __init__(self, config: LlamoeConfig, layer_idx: int):
|
| 704 |
super().__init__()
|
| 705 |
self.hidden_size = config.hidden_size
|
| 706 |
|
| 707 |
-
self.self_attn =
|
| 708 |
|
| 709 |
-
self.block_sparse_moe =
|
| 710 |
self.input_layernorm = LlamoeRMSNorm(config.hidden_size, eps=config.rms_norm_eps)
|
| 711 |
self.post_attention_layernorm = LlamoeRMSNorm(config.hidden_size, eps=config.rms_norm_eps)
|
| 712 |
|
|
@@ -777,18 +751,15 @@ class LlamoeDecoderLayer(nn.Module):
|
|
| 777 |
return outputs
|
| 778 |
|
| 779 |
|
| 780 |
-
|
| 781 |
-
LLAMOE_START_DOCSTRING = r"""
|
| 782 |
This model inherits from [`PreTrainedModel`]. Check the superclass documentation for the generic methods the
|
| 783 |
library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads
|
| 784 |
etc.)
|
| 785 |
-
|
| 786 |
This model is also a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) subclass.
|
| 787 |
Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage
|
| 788 |
and behavior.
|
| 789 |
-
|
| 790 |
Parameters:
|
| 791 |
-
config ([`
|
| 792 |
Model configuration class with all the parameters of the model. Initializing with a config file does not
|
| 793 |
load the weights associated with the model, only the configuration. Check out the
|
| 794 |
[`~PreTrainedModel.from_pretrained`] method to load the model weights.
|
|
@@ -796,11 +767,11 @@ LLAMOE_START_DOCSTRING = r"""
|
|
| 796 |
|
| 797 |
|
| 798 |
@add_start_docstrings(
|
| 799 |
-
"The bare
|
| 800 |
-
|
| 801 |
)
|
| 802 |
|
| 803 |
-
class
|
| 804 |
config_class = LlamoeConfig
|
| 805 |
base_model_prefix = "model"
|
| 806 |
supports_gradient_checkpointing = True
|
|
@@ -844,7 +815,7 @@ class LlammoePreTrainedModel(PreTrainedModel):
|
|
| 844 |
layer.self_attn.past_key_value = None
|
| 845 |
|
| 846 |
|
| 847 |
-
|
| 848 |
Args:
|
| 849 |
input_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`):
|
| 850 |
Indices of input sequence tokens in the vocabulary. Padding will be ignored by default should you provide
|
|
@@ -908,14 +879,14 @@ LLAMOE_INPUTS_DOCSTRING = r"""
|
|
| 908 |
|
| 909 |
@add_start_docstrings(
|
| 910 |
"The bare Gemmoe Model outputting raw hidden-states without any specific head on top.",
|
| 911 |
-
|
| 912 |
)
|
| 913 |
|
| 914 |
-
class LlamoeModel(
|
| 915 |
"""
|
| 916 |
-
Transformer decoder consisting of *config.num_hidden_layers* layers. Each layer is a [`
|
| 917 |
Args:
|
| 918 |
-
config:
|
| 919 |
"""
|
| 920 |
|
| 921 |
def __init__(self, config: LlamoeConfig):
|
|
@@ -945,7 +916,7 @@ class LlamoeModel(LlammoePreTrainedModel):
|
|
| 945 |
def set_input_embeddings(self, value):
|
| 946 |
self.embed_tokens = value
|
| 947 |
|
| 948 |
-
@add_start_docstrings_to_model_forward(
|
| 949 |
def forward(
|
| 950 |
self,
|
| 951 |
input_ids: torch.LongTensor = None,
|
|
@@ -1121,12 +1092,12 @@ class LlamoeModel(LlammoePreTrainedModel):
|
|
| 1121 |
|
| 1122 |
return causal_mask
|
| 1123 |
|
| 1124 |
-
class LlamoeForCausalLM(
|
| 1125 |
_tied_weights_keys = ["lm_head.weight"]
|
| 1126 |
|
| 1127 |
def __init__(self, config):
|
| 1128 |
super().__init__(config)
|
| 1129 |
-
self.model =
|
| 1130 |
self.vocab_size = config.vocab_size
|
| 1131 |
self.lm_head = nn.Linear(config.hidden_size, config.vocab_size, bias=False)
|
| 1132 |
self.router_aux_loss_coef = config.router_aux_loss_coef
|
|
@@ -1153,7 +1124,7 @@ class LlamoeForCausalLM(LlammoePreTrainedModel):
|
|
| 1153 |
def get_decoder(self):
|
| 1154 |
return self.model
|
| 1155 |
|
| 1156 |
-
@add_start_docstrings_to_model_forward(
|
| 1157 |
@replace_return_docstrings(output_type=MoeCausalLMOutputWithPast, config_class=_CONFIG_FOR_DOC)
|
| 1158 |
# Ignore copy
|
| 1159 |
def forward(
|
|
|
|
| 33 |
replace_return_docstrings,
|
| 34 |
)
|
| 35 |
from transformers.utils.import_utils import is_torch_fx_available
|
| 36 |
+
from .configuration_gemmoe import LlamoeConfig
|
| 37 |
|
| 38 |
from math import sqrt as math_sqrt
|
|
|
|
| 39 |
|
| 40 |
|
| 41 |
if is_flash_attn_2_available():
|
|
|
|
| 52 |
|
| 53 |
_prepare_4d_causal_attention_mask = torch.fx.wrap(_prepare_4d_causal_attention_mask)
|
| 54 |
|
| 55 |
+
|
| 56 |
+
logger = logging.get_logger(__name__)
|
| 57 |
+
|
| 58 |
+
_CONFIG_FOR_DOC = "LlamoeConfig"
|
| 59 |
|
| 60 |
def load_balancing_loss_func(
|
| 61 |
gate_logits: torch.Tensor, num_experts: torch.Tensor = None, top_k=2, attention_mask: Optional[torch.Tensor] = None
|
|
|
|
| 131 |
|
| 132 |
|
| 133 |
|
| 134 |
+
def approx_gelu(x):
|
| 135 |
+
return 0.5 * x * (1 + torch.tanh(math.sqrt(2 / math.pi) * (x + 0.044715 * x**3)))
|
| 136 |
+
|
| 137 |
def _get_unpad_data(attention_mask):
|
| 138 |
seqlens_in_batch = attention_mask.sum(dim=-1, dtype=torch.int32)
|
| 139 |
indices = torch.nonzero(attention_mask.flatten(), as_tuple=False).flatten()
|
| 140 |
max_seqlen_in_batch = seqlens_in_batch.max().item()
|
| 141 |
+
cu_seqlens = F.pad(torch.cumsum(seqlens_in_batch, dim=0, dtype=torch.torch.int32), (1, 0))
|
| 142 |
return (
|
| 143 |
indices,
|
| 144 |
cu_seqlens,
|
| 145 |
max_seqlen_in_batch,
|
| 146 |
)
|
| 147 |
|
| 148 |
+
|
| 149 |
+
|
| 150 |
class LlamoeRMSNorm(nn.Module):
|
| 151 |
+
def __init__(self, dim: int, eps: float = 1e-6):
|
|
|
|
|
|
|
|
|
|
| 152 |
super().__init__()
|
| 153 |
+
self.eps = eps
|
| 154 |
+
self.weight = nn.Parameter(torch.zeros(dim))
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 155 |
|
| 156 |
+
def _norm(self, x):
|
| 157 |
+
x_float = x.float()
|
| 158 |
+
normed_x = x_float * torch.rsqrt(x_float.pow(2).mean(-1, keepdim=True) + self.eps)
|
| 159 |
+
return normed_x
|
| 160 |
|
| 161 |
+
def forward(self, x):
|
| 162 |
+
normed_x = self._norm(x)
|
| 163 |
+
# Downcast the result to the original dtype at the end
|
| 164 |
+
normed_x = normed_x.type_as(x)
|
| 165 |
+
return normed_x * (self.weight + 1)
|
| 166 |
|
| 167 |
+
ALL_LAYERNORM_LAYERS.append(GemmoeRMSNorm)
|
| 168 |
|
| 169 |
class LlamoeRotaryEmbedding(nn.Module):
|
| 170 |
def __init__(self, dim, max_position_embeddings=2048, base=10000, device=None):
|
|
|
|
| 210 |
k_embed = (k * cos) + (rotate_half(k) * sin)
|
| 211 |
return q_embed, k_embed
|
| 212 |
|
| 213 |
+
|
| 214 |
+
# Copied from transformers.models.llama.modeling_llama.repeat_kv
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 215 |
def repeat_kv(hidden_states: torch.Tensor, n_rep: int) -> torch.Tensor:
|
| 216 |
"""
|
| 217 |
This is the equivalent of torch.repeat_interleave(x, dim=1, repeats=n_rep). The hidden states go from (batch,
|
|
|
|
| 223 |
hidden_states = hidden_states[:, :, None, :, :].expand(batch, num_key_value_heads, n_rep, slen, head_dim)
|
| 224 |
return hidden_states.reshape(batch, num_key_value_heads * n_rep, slen, head_dim)
|
| 225 |
|
|
|
|
| 226 |
class LlamoeAttention(nn.Module):
|
| 227 |
"""Multi-headed attention from 'Attention Is All You Need' paper"""
|
| 228 |
|
| 229 |
+
# Ignore copy
|
| 230 |
def __init__(self, config: LlamoeConfig, layer_idx: Optional[int] = None):
|
| 231 |
super().__init__()
|
| 232 |
self.config = config
|
|
|
|
| 241 |
self.attention_dropout = config.attention_dropout
|
| 242 |
self.hidden_size = config.hidden_size
|
| 243 |
self.num_heads = config.num_attention_heads
|
| 244 |
+
self.head_dim = config.head_dim
|
| 245 |
self.num_key_value_heads = config.num_key_value_heads
|
| 246 |
self.num_key_value_groups = self.num_heads // self.num_key_value_heads
|
| 247 |
self.max_position_embeddings = config.max_position_embeddings
|
| 248 |
self.rope_theta = config.rope_theta
|
| 249 |
self.is_causal = True
|
| 250 |
|
| 251 |
+
if self.hidden_size % self.num_heads != 0:
|
| 252 |
raise ValueError(
|
| 253 |
f"hidden_size must be divisible by num_heads (got `hidden_size`: {self.hidden_size}"
|
| 254 |
f" and `num_heads`: {self.num_heads})."
|
|
|
|
| 257 |
self.q_proj = nn.Linear(self.hidden_size, self.num_heads * self.head_dim, bias=config.attention_bias)
|
| 258 |
self.k_proj = nn.Linear(self.hidden_size, self.num_key_value_heads * self.head_dim, bias=config.attention_bias)
|
| 259 |
self.v_proj = nn.Linear(self.hidden_size, self.num_key_value_heads * self.head_dim, bias=config.attention_bias)
|
| 260 |
+
self.o_proj = nn.Linear(self.num_heads * self.head_dim, self.hidden_size, bias=config.attention_bias)
|
| 261 |
+
self.rotary_emb = LlamoeRotaryEmbedding(
|
| 262 |
+
self.head_dim,
|
| 263 |
+
max_position_embeddings=self.max_position_embeddings,
|
| 264 |
+
base=self.rope_theta,
|
| 265 |
+
)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 266 |
|
| 267 |
def forward(
|
| 268 |
self,
|
|
|
|
| 277 |
) -> Tuple[torch.Tensor, Optional[torch.Tensor], Optional[Tuple[torch.Tensor]]]:
|
| 278 |
bsz, q_len, _ = hidden_states.size()
|
| 279 |
|
| 280 |
+
query_states = self.q_proj(hidden_states)
|
| 281 |
+
key_states = self.k_proj(hidden_states)
|
| 282 |
+
value_states = self.v_proj(hidden_states)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 283 |
|
| 284 |
query_states = query_states.view(bsz, q_len, self.num_heads, self.head_dim).transpose(1, 2)
|
| 285 |
key_states = key_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
|
| 286 |
value_states = value_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
|
| 287 |
|
| 288 |
past_key_value = getattr(self, "past_key_value", past_key_value)
|
| 289 |
+
cos, sin = self.rotary_emb(value_states, position_ids, seq_len=None)
|
| 290 |
+
query_states, key_states = apply_rotary_pos_emb(query_states, key_states, cos, sin, None)
|
| 291 |
|
| 292 |
if past_key_value is not None:
|
| 293 |
# sin and cos are specific to RoPE models; cache_position needed for the static cache
|
|
|
|
| 300 |
attn_weights = torch.matmul(query_states, key_states.transpose(2, 3)) / math.sqrt(self.head_dim)
|
| 301 |
|
| 302 |
if attention_mask is not None: # no matter the length, we just slice it
|
|
|
|
| 303 |
if cache_position is not None:
|
| 304 |
causal_mask = attention_mask[:, :, cache_position, : key_states.shape[-2]]
|
| 305 |
+
else:
|
| 306 |
+
causal_mask = attention_mask
|
| 307 |
attn_weights = attn_weights + causal_mask
|
| 308 |
|
| 309 |
# upcast attention to fp32
|
|
|
|
| 319 |
|
| 320 |
attn_output = attn_output.transpose(1, 2).contiguous()
|
| 321 |
|
| 322 |
+
attn_output = attn_output.view(bsz, q_len, -1)
|
| 323 |
+
attn_output = self.o_proj(attn_output)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 324 |
|
| 325 |
if not output_attentions:
|
| 326 |
attn_weights = None
|
|
|
|
| 328 |
return attn_output, attn_weights, past_key_value
|
| 329 |
|
| 330 |
|
| 331 |
+
# Copied from transformers.models.llama.modeling_llama.LlamaFlashAttention2 with Llama->Gemmoe
|
| 332 |
+
class LlamoeFlashAttention2(GemmoeAttention):
|
| 333 |
"""
|
| 334 |
+
Gemmoe flash attention module. This module inherits from `GemmoeAttention` as the weights of the module stays
|
| 335 |
untouched. The only required change would be on the forward pass where it needs to correctly call the public API of
|
| 336 |
flash attention and deal with padding tokens in case the input contains any of them.
|
| 337 |
"""
|
|
|
|
| 344 |
# 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).
|
| 345 |
self._flash_attn_uses_top_left_mask = not is_flash_attn_greater_or_equal_2_10()
|
| 346 |
|
| 347 |
+
# Ignore copy
|
| 348 |
def forward(
|
| 349 |
self,
|
| 350 |
hidden_states: torch.Tensor,
|
|
|
|
| 371 |
key_states = key_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
|
| 372 |
value_states = value_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
|
| 373 |
|
| 374 |
+
cos, sin = self.rotary_emb(value_states, position_ids, seq_len=None)
|
| 375 |
+
query_states, key_states = apply_rotary_pos_emb(query_states, key_states, cos, sin, None)
|
| 376 |
|
| 377 |
past_key_value = getattr(self, "past_key_value", past_key_value)
|
| 378 |
|
|
|
|
| 393 |
# therefore the input hidden states gets silently casted in float32. Hence, we need
|
| 394 |
# cast them back in the correct dtype just to be sure everything works as expected.
|
| 395 |
# This might slowdown training & inference so it is recommended to not cast the LayerNorms
|
| 396 |
+
# in fp32. (GemmoeRMSNorm handles it correctly)
|
| 397 |
|
| 398 |
input_dtype = query_states.dtype
|
| 399 |
if input_dtype == torch.float32:
|
|
|
|
| 419 |
query_states, key_states, value_states, attention_mask, q_len, dropout=dropout_rate
|
| 420 |
)
|
| 421 |
|
| 422 |
+
attn_output = attn_output.reshape(bsz, q_len, -1).contiguous()
|
| 423 |
attn_output = self.o_proj(attn_output)
|
| 424 |
|
| 425 |
if not output_attentions:
|
|
|
|
| 433 |
"""
|
| 434 |
Calls the forward method of Flash Attention - if the input hidden states contain at least one padding token
|
| 435 |
first unpad the input, then computes the attention scores and pad the final attention scores.
|
|
|
|
| 436 |
Args:
|
| 437 |
query_states (`torch.Tensor`):
|
| 438 |
Input query states to be passed to Flash Attention API
|
|
|
|
| 451 |
if not self._flash_attn_uses_top_left_mask:
|
| 452 |
causal = self.is_causal
|
| 453 |
else:
|
| 454 |
+
# TODO: Remove the `query_length != 1` check once Flash Attention for RoCm is bumped to 2.1. For details, please see the comment in GemmoeFlashAttention2 __init__.
|
| 455 |
causal = self.is_causal and query_length != 1
|
| 456 |
|
| 457 |
# Contains at least one padding token in the sequence
|
|
|
|
| 524 |
)
|
| 525 |
|
| 526 |
|
| 527 |
+
# Copied from transformers.models.llama.modeling_llama.LlamaSdpaAttention with Llama->Gemmoe
|
| 528 |
class LlamoeSdpaAttention(LlamoeAttention):
|
| 529 |
"""
|
| 530 |
Gemmoe attention module using torch.nn.functional.scaled_dot_product_attention. This module inherits from
|
|
|
|
| 546 |
if output_attentions:
|
| 547 |
# TODO: Improve this warning with e.g. `model.config.attn_implementation = "manual"` once this is implemented.
|
| 548 |
logger.warning_once(
|
| 549 |
+
"GemmoeModel is using GemmoeSdpaAttention, but `torch.nn.functional.scaled_dot_product_attention` does not support `output_attentions=True`. Falling back to the manual attention implementation, "
|
| 550 |
'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.'
|
| 551 |
)
|
| 552 |
return super().forward(
|
|
|
|
| 582 |
key_states = repeat_kv(key_states, self.num_key_value_groups)
|
| 583 |
value_states = repeat_kv(value_states, self.num_key_value_groups)
|
| 584 |
|
| 585 |
+
causal_mask = attention_mask
|
| 586 |
+
if attention_mask is not None and cache_position is not None:
|
| 587 |
+
causal_mask = causal_mask[:, :, cache_position, : key_states.shape[-2]]
|
| 588 |
|
| 589 |
# SDPA with memory-efficient backend is currently (torch==2.1.2) bugged with non-contiguous inputs with custom attn_mask,
|
| 590 |
# Reference: https://github.com/pytorch/pytorch/issues/112577.
|
|
|
|
| 593 |
key_states = key_states.contiguous()
|
| 594 |
value_states = value_states.contiguous()
|
| 595 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 596 |
attn_output = torch.nn.functional.scaled_dot_product_attention(
|
| 597 |
query_states,
|
| 598 |
key_states,
|
|
|
|
| 607 |
attn_output = self.o_proj(attn_output)
|
| 608 |
|
| 609 |
return attn_output, None, past_key_value
|
| 610 |
+
|
| 611 |
|
| 612 |
LLAMOE_ATTENTION_CLASSES = {
|
| 613 |
"eager": LlamoeAttention,
|
| 614 |
"flash_attention_2": LlamoeFlashAttention2,
|
| 615 |
+
"sdpa": LlamoeSdpaAttention,
|
| 616 |
}
|
| 617 |
|
| 618 |
+
class LlamoeBlockSparseTop2MLP(nn.Module):
|
| 619 |
+
def __init__(self, config: GemmoeConfig):
|
| 620 |
+
super().__init__()
|
| 621 |
+
self.ffn_dim = config.intermediate_size
|
| 622 |
+
self.hidden_dim = config.hidden_size
|
| 623 |
+
|
| 624 |
+
self.w1 = nn.Linear(self.hidden_dim, self.ffn_dim, bias=False)
|
| 625 |
+
self.w2 = nn.Linear(self.ffn_dim, self.hidden_dim, bias=False)
|
| 626 |
+
self.w3 = nn.Linear(self.hidden_dim, self.ffn_dim, bias=False)
|
| 627 |
+
|
| 628 |
+
self.act_fn = approx_gelu
|
| 629 |
+
|
| 630 |
+
def forward(self, hidden_states):
|
| 631 |
+
current_hidden_states = self.act_fn(self.w1(hidden_states)) * self.w3(hidden_states)
|
| 632 |
+
current_hidden_states = self.w2(current_hidden_states)
|
| 633 |
+
return current_hidden_states.to(hidden_states.dtype)
|
| 634 |
+
|
| 635 |
+
|
| 636 |
+
class LlamoeSparseMoeBlock(nn.Module):
|
| 637 |
+
def __init__(self, config):
|
| 638 |
+
super().__init__()
|
| 639 |
+
self.hidden_dim = config.hidden_size
|
| 640 |
+
self.ffn_dim = config.intermediate_size
|
| 641 |
+
self.num_experts = config.num_local_experts
|
| 642 |
+
self.top_k = 2
|
| 643 |
+
|
| 644 |
+
# gating
|
| 645 |
+
self.gate = nn.Linear(self.hidden_dim, self.num_experts, bias=False)
|
| 646 |
+
|
| 647 |
+
self.experts = nn.ModuleList([LlamoeBlockSparseTop2MLP(config) for _ in range(self.num_experts)])
|
| 648 |
+
|
| 649 |
+
def forward(self, hidden_states: torch.Tensor) -> Tuple[torch.Tensor, torch.Tensor]:
|
| 650 |
+
batch_size, sequence_length, hidden_dim = hidden_states.shape
|
| 651 |
+
hidden_states = hidden_states.view(-1, hidden_dim)
|
| 652 |
+
|
| 653 |
+
# router_logits: (batch * sequence_length, n_experts)
|
| 654 |
+
router_logits = self.gate(hidden_states)
|
| 655 |
+
routing_weights = F.softmax(router_logits, dim=1)
|
| 656 |
+
topk_weight, topk_idx = torch.topk(routing_weights, self.top_k, dim=-1, sorted=False)
|
| 657 |
+
topk_weight /= topk_weight.sum(dim=-1, keepdim=True)
|
| 658 |
+
|
| 659 |
+
hidden_states = hidden_states.repeat_interleave(self.top_k, dim=0)
|
| 660 |
+
|
| 661 |
+
y = torch.empty_like(hidden_states)
|
| 662 |
+
|
| 663 |
+
flat_topk_idx = topk_idx.view(-1)
|
| 664 |
+
for i in range(self.num_experts):
|
| 665 |
+
expert = self.experts[i]
|
| 666 |
+
expert_output = expert(hidden_states[flat_topk_idx == i])
|
| 667 |
+
y[flat_topk_idx == i] = expert_output
|
| 668 |
+
|
| 669 |
+
y = (y.view(*topk_weight.shape, -1) * topk_weight.unsqueeze(-1)).sum(dim=1)
|
| 670 |
+
|
| 671 |
+
final_hidden_states = y.reshape(batch_size, sequence_length, hidden_dim)
|
| 672 |
+
return final_hidden_states.to(hidden_states.dtype), router_logits.to(hidden_states.dtype)
|
| 673 |
|
| 674 |
+
|
| 675 |
+
# Copied from transformers.models.llama.modeling_llama.LlamaDecoderLayer with LLAMA->GEMMOE,Llama->Gemmoe
|
| 676 |
class LlamoeDecoderLayer(nn.Module):
|
| 677 |
def __init__(self, config: LlamoeConfig, layer_idx: int):
|
| 678 |
super().__init__()
|
| 679 |
self.hidden_size = config.hidden_size
|
| 680 |
|
| 681 |
+
self.self_attn = Llamoe_ATTENTION_CLASSES[config._attn_implementation](config, layer_idx)
|
| 682 |
|
| 683 |
+
self.block_sparse_moe = LlamoeSparseMoeBlock(config)
|
| 684 |
self.input_layernorm = LlamoeRMSNorm(config.hidden_size, eps=config.rms_norm_eps)
|
| 685 |
self.post_attention_layernorm = LlamoeRMSNorm(config.hidden_size, eps=config.rms_norm_eps)
|
| 686 |
|
|
|
|
| 751 |
return outputs
|
| 752 |
|
| 753 |
|
| 754 |
+
Llamoe_START_DOCSTRING = r"""
|
|
|
|
| 755 |
This model inherits from [`PreTrainedModel`]. Check the superclass documentation for the generic methods the
|
| 756 |
library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads
|
| 757 |
etc.)
|
|
|
|
| 758 |
This model is also a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) subclass.
|
| 759 |
Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage
|
| 760 |
and behavior.
|
|
|
|
| 761 |
Parameters:
|
| 762 |
+
config ([`GemmoeConfig`]):
|
| 763 |
Model configuration class with all the parameters of the model. Initializing with a config file does not
|
| 764 |
load the weights associated with the model, only the configuration. Check out the
|
| 765 |
[`~PreTrainedModel.from_pretrained`] method to load the model weights.
|
|
|
|
| 767 |
|
| 768 |
|
| 769 |
@add_start_docstrings(
|
| 770 |
+
"The bare Gemmoe Model outputting raw hidden-states without any specific head on top.",
|
| 771 |
+
Llamoe_START_DOCSTRING,
|
| 772 |
)
|
| 773 |
|
| 774 |
+
class LlamoePreTrainedModel(PreTrainedModel):
|
| 775 |
config_class = LlamoeConfig
|
| 776 |
base_model_prefix = "model"
|
| 777 |
supports_gradient_checkpointing = True
|
|
|
|
| 815 |
layer.self_attn.past_key_value = None
|
| 816 |
|
| 817 |
|
| 818 |
+
Llamoe_INPUTS_DOCSTRING = r"""
|
| 819 |
Args:
|
| 820 |
input_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`):
|
| 821 |
Indices of input sequence tokens in the vocabulary. Padding will be ignored by default should you provide
|
|
|
|
| 879 |
|
| 880 |
@add_start_docstrings(
|
| 881 |
"The bare Gemmoe Model outputting raw hidden-states without any specific head on top.",
|
| 882 |
+
Llamoe_START_DOCSTRING,
|
| 883 |
)
|
| 884 |
|
| 885 |
+
class LlamoeModel(LlamoePreTrainedModel):
|
| 886 |
"""
|
| 887 |
+
Transformer decoder consisting of *config.num_hidden_layers* layers. Each layer is a [`GemmoeDecoderLayer`]
|
| 888 |
Args:
|
| 889 |
+
config: GemmoeConfig
|
| 890 |
"""
|
| 891 |
|
| 892 |
def __init__(self, config: LlamoeConfig):
|
|
|
|
| 916 |
def set_input_embeddings(self, value):
|
| 917 |
self.embed_tokens = value
|
| 918 |
|
| 919 |
+
@add_start_docstrings_to_model_forward(Llamoe_INPUTS_DOCSTRING)
|
| 920 |
def forward(
|
| 921 |
self,
|
| 922 |
input_ids: torch.LongTensor = None,
|
|
|
|
| 1092 |
|
| 1093 |
return causal_mask
|
| 1094 |
|
| 1095 |
+
class LlamoeForCausalLM(LlamoePreTrainedModel):
|
| 1096 |
_tied_weights_keys = ["lm_head.weight"]
|
| 1097 |
|
| 1098 |
def __init__(self, config):
|
| 1099 |
super().__init__(config)
|
| 1100 |
+
self.model = GemmoeModel(config)
|
| 1101 |
self.vocab_size = config.vocab_size
|
| 1102 |
self.lm_head = nn.Linear(config.hidden_size, config.vocab_size, bias=False)
|
| 1103 |
self.router_aux_loss_coef = config.router_aux_loss_coef
|
|
|
|
| 1124 |
def get_decoder(self):
|
| 1125 |
return self.model
|
| 1126 |
|
| 1127 |
+
@add_start_docstrings_to_model_forward(GEMMOE_INPUTS_DOCSTRING)
|
| 1128 |
@replace_return_docstrings(output_type=MoeCausalLMOutputWithPast, config_class=_CONFIG_FOR_DOC)
|
| 1129 |
# Ignore copy
|
| 1130 |
def forward(
|