Incomplete
Browse files- checkpoints/step_7500/config.json +0 -22
- checkpoints/step_7500/fabric_state/checkpoint/mp_rank_00_model_states.pt +0 -3
- checkpoints/step_7500/model.safetensors +0 -3
- checkpoints/step_7500/pico_decoder.py +0 -623
- checkpoints/step_7500/special_tokens_map.json +0 -23
- checkpoints/step_7500/tokenizer.json +0 -0
- checkpoints/step_7500/tokenizer_config.json +0 -248
checkpoints/step_7500/config.json
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{
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"activation_hidden_dim": 6144,
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"architectures": [
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"PicoDecoderHF"
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],
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"attention_n_heads": 12,
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"attention_n_kv_heads": 4,
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"auto_map": {
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"AutoConfig": "pico_decoder.PicoDecoderHFConfig",
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"AutoModelForCausalLM": "pico_decoder.PicoDecoderHF"
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},
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"batch_size": 1024,
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"d_model": 1536,
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"max_seq_len": 512,
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"model_type": "pico_decoder",
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"n_layers": 12,
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"norm_eps": 1e-06,
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"position_emb_theta": 10000.0,
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"torch_dtype": "float32",
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"transformers_version": "4.48.3",
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"vocab_size": 50281
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}
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checkpoints/step_7500/fabric_state/checkpoint/mp_rank_00_model_states.pt
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version https://git-lfs.github.com/spec/v1
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oid sha256:dd9c5745c862431946d20567566cbf5a57abe4c43d1bc8ad3810f1b8b94d5e7a
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size 67138069
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checkpoints/step_7500/model.safetensors
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version https://git-lfs.github.com/spec/v1
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oid sha256:64f6da054ed07dcd0b7ea12c5871e6b8456e6f9c2af3d3fa32f3398cda9f3638
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size 2267115520
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checkpoints/step_7500/pico_decoder.py
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"""
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Pico Decoder: A Lightweight Causal Transformer Language Model
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Pico Decoder uses a simple LLAMA-style transformer architecture, written for clarity and educational purposes.
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Everything is written with a modular design for easy modification and experimentation.
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Key features:
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- RMSNorm for layer normalization
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- Rotary Positional Embeddings (RoPE)
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- Multi-head attention with KV-cache support
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- SwiGLU activation function
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- Residual connections throughout
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- KV-cache for faster autoregressive generation
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References:
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- RoPE: https://arxiv.org/abs/2104.09864
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- SwiGLU: https://arxiv.org/abs/2002.05202
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- LLAMA: https://arxiv.org/abs/2302.13971
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Adapted from:
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- OLMO: https://github.com/allenai/OLMo
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- LLAMA: https://github.com/meta/llama
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"""
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from dataclasses import asdict
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from typing import TYPE_CHECKING, Any, Dict, Optional, Tuple, Union
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import torch
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import torch.nn as nn
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import torch.nn.functional as F
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from torch.nn.attention import SDPBackend, sdpa_kernel
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from transformers import PretrainedConfig, PreTrainedModel
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from transformers.modeling_outputs import CausalLMOutput, CausalLMOutputWithPast
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try:
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if TYPE_CHECKING:
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# We need to do this to avoid importing these when creating the HF-compatible models
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from src.config import ModelConfig
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except ImportError:
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pass
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########################################################
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#
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# Layer Normalization
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#
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########################################################
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class RMSNorm(torch.nn.Module):
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"""Root Mean Square Layer Normalization.
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A variant of Layer Normalization that uses RMS statistics instead of mean/variance,
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resulting in improved stability and performance.
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Args:
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config (Union[ModelConfig, PicoHFConfig]): Configuration object containing normalization parameters
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- config.norm_eps: Small constant for numerical stability
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- config.d_model: Model dimension for the weight parameter
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References:
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https://arxiv.org/abs/1910.07467
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"""
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def __init__(self, config: Union["ModelConfig", "PicoDecoderHFConfig"]):
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super().__init__()
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self.eps = config.norm_eps
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self.weight = nn.Parameter(torch.ones(config.d_model))
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def _norm(self, x: torch.Tensor) -> torch.Tensor:
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"""
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Normalizes the input tensor by its RMS value.
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"""
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return x * torch.rsqrt(x.pow(2).mean(-1, keepdim=True) + self.eps)
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def forward(self, x: torch.Tensor) -> torch.Tensor:
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"""
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Applies RMS normalization to the input tensor and scales it by the weight parameter.
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"""
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output = self._norm(x.float()).type_as(x)
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return output * self.weight
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########################################################
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#
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# Positional Embedding
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#
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########################################################
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class RoPE(nn.Module):
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"""Rotary Positional Embeddings (RoPE).
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Implements position-dependent rotation of keys and queries in attention mechanism,
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allowing better modeling of relative positions in sequences. Uses complex number
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operations for efficient rotation.
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Args:
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config (Union[ModelConfig, PicoHFConfig]): Model configuration containing:
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- config.position_emb_theta: Base for frequency computation
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- config.d_model: Model dimension
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- config.attention_n_heads: Number of attention heads
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- config.max_seq_len: Maximum sequence length
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References:
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https://arxiv.org/abs/2104.09864
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"""
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_freqs_cis_tensor: torch.Tensor | None = None
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def __init__(self, config: Union["ModelConfig", "PicoDecoderHFConfig"]):
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super().__init__()
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self.theta = config.position_emb_theta
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self.dim = config.d_model // config.attention_n_heads
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max_seq_len = config.max_seq_len
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# only gets set once, and then reused for all RoPE instances
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if RoPE._freqs_cis_tensor is None:
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RoPE._freqs_cis_tensor = self._setup_freqs_cis(
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max_seq_len, self.theta, self.dim
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)
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# register _freqs_cis buffer
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# can be easily recomputed so persistent=False
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self.register_buffer("_freqs_cis", self._freqs_cis_tensor, persistent=False)
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@classmethod
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def _setup_freqs_cis(cls, seq_len: int, theta: float, dim: int) -> torch.Tensor:
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"""Setup Frequency Tensor for RoPE Embeddings
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Initializes the complex frequency tensor that is used to compute the RoPE embeddings.
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Note other implementations will use cos and sin directly, but using the complex
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number representation is (probably?) more efficient:
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e^(theta * i * t) = cos(theta * t) + i * sin(theta * t) [Euler's formula]
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"""
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_freqs = 1.0 / (theta ** (torch.arange(0, dim, 2)[: (dim // 2)].float() / dim))
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positions = torch.arange(seq_len)
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freqs = torch.outer(positions, _freqs)
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return torch.polar(torch.ones_like(freqs), freqs) # complex64
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def get_freqs_cis(
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self, input_shape: torch.Size, start_pos: int, end_pos: int
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) -> torch.Tensor:
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"""Reshape Frequency Tensor for RoPE Embeddings
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Makes the frequency tensor broadcastable with the input tensor.
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"""
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_freqs_cis = self._freqs_cis[start_pos:end_pos]
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ndim = len(input_shape)
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assert 0 <= 1 < ndim
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assert _freqs_cis.shape == (input_shape[1], input_shape[-1])
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# TODO: Check whether this is correct (might be able to remove this)
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shape = [d if i == 1 or i == ndim - 1 else 1 for i, d in enumerate(input_shape)]
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return _freqs_cis.view(*shape)
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def forward(
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self,
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queries: torch.Tensor,
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keys: torch.Tensor,
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start_pos: int = 0,
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) -> Tuple[torch.Tensor, torch.Tensor]:
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"""Apply RoPE Embeddings to Queries and Keys
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Applies the rotary positional embeddings to the input tensors via complex num multiplication
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NOTE: The start_pos is used if we want to use the kv_cache in the attention mechanism.
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"""
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queries_ = torch.view_as_complex(
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queries.float().reshape(*queries.shape[:-1], -1, 2)
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)
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keys_ = torch.view_as_complex(keys.float().reshape(*keys.shape[:-1], -1, 2))
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input_shape = (
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queries_.shape
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) # same as keys: (batch_size, seq_len, n_heads, head_dim/2)
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freqs_start_pos = start_pos
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freqs_end_pos = freqs_start_pos + queries_.shape[1]
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freqs_cis = self.get_freqs_cis(input_shape, freqs_start_pos, freqs_end_pos)
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queries_rotated = torch.view_as_real(queries_ * freqs_cis).flatten(3)
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keys_rotated = torch.view_as_real(keys_ * freqs_cis).flatten(3)
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return queries_rotated.type_as(queries), keys_rotated.type_as(keys)
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########################################################
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#
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# Attention
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#
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########################################################
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class Attention(nn.Module):
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"""Multi-head Attention with Group Query Attention support.
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Implements scaled dot-product attention and supports:
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- Grouped Query Attention (GQA)
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- Key-Value caching for efficient inference
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- RoPE integration
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Args:
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config (Union[ModelConfig, PretrainedConfig]): Configuration containing:
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- config.attention_n_heads: Number of attention heads
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- config.attention_n_kv_heads: Number of key/value heads
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- config.d_model: Model dimension
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- config.batch_size: Maximum batch size
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- config.max_seq_len: Maximum sequence length
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Shape:
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- Input: (batch_size, seq_len, d_model)
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- Output: (batch_size, seq_len, d_model)
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"""
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def __init__(
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self,
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config: Union["ModelConfig", "PicoDecoderHFConfig"],
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):
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super().__init__()
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self.n_heads = config.attention_n_heads
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self.n_kv_heads = config.attention_n_kv_heads
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self.batch_size = config.batch_size
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self.max_seq_len = config.max_seq_len
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d_model = config.d_model
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self.head_dim = d_model // self.n_heads
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self.n_rep = self.n_heads // self.n_kv_heads
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self.q_proj = nn.Linear(d_model, self.n_heads * self.head_dim, bias=False)
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self.k_proj = nn.Linear(d_model, self.n_kv_heads * self.head_dim, bias=False)
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self.v_proj = nn.Linear(d_model, self.n_kv_heads * self.head_dim, bias=False)
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self.o_proj = nn.Linear(self.n_heads * self.head_dim, d_model, bias=False)
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self.rope = RoPE(config)
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def forward(
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self,
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input: torch.Tensor,
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mask: Optional[torch.Tensor] = None,
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past_key_values: Optional[Tuple[torch.Tensor, ...]] = None,
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use_cache: bool = False,
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) -> Tuple[torch.Tensor, Optional[Tuple[torch.Tensor, torch.Tensor]]]:
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"""Forward pass for the attention mechanism.
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Computes queries, keys, and values for the attention mechanism. Applies rotary positional
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embeddings to the queries and keys, and then computes attention scores and outputs.
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For an introduction to the attention mechanism, see:
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https://arxiv.org/abs/1706.03762
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A few things to note:
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- The past_key_values is used to implement the KV cache, which is used to speed up
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generation by caching the KV pairs from previous forward passes. This is useful when doing
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tasks that require generating multiple tokens conditioned on previous tokens (e.g. language
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modeling, text generation, etc.). The way the KV cache is implemented is that each layer has
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its own KV cache - this KV cache is implemented as a tuple.
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"""
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bsz, seq_len, _ = input.shape
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_queries, _keys, _values = (
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self.q_proj(input),
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self.k_proj(input),
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self.v_proj(input),
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)
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# Reshaping for multi-head attention
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queries = _queries.view(bsz, seq_len, self.n_heads, self.head_dim)
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keys = _keys.view(bsz, seq_len, self.n_kv_heads, self.head_dim)
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values = _values.view(bsz, seq_len, self.n_kv_heads, self.head_dim)
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# The start position is used to apply the RoPE embeddings to only the new tokens
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# when using the kv_cache in the attention mechanism.
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# We want to start from the last position in the cache.
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start_pos = past_key_values[0].shape[1] if past_key_values is not None else 0
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# apply rotary positional embeddings
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queries, keys = self.rope(queries, keys, start_pos)
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if past_key_values is not None:
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keys = torch.cat([past_key_values[0], keys], dim=1)
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values = torch.cat([past_key_values[1], values], dim=1)
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if use_cache:
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cached_keys = keys
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cached_values = values
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else:
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cached_keys = None
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cached_values = None
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queries = queries.transpose(1, 2)
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keys = keys.transpose(1, 2)
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values = values.transpose(1, 2)
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apply_gqa = self.n_rep > 1
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if apply_gqa and queries.device.type == "mps":
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# NOTE: MPS does not support GQA in the SDPA kernel, but we can repeat the keys and values
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# outside of the kernel to get the same effect.
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# See: https://pytorch.org/docs/stable/generated/torch.nn.functional.scaled_dot_product_attention.html
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keys = keys.repeat_interleave(self.n_rep, dim=-3)
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values = values.repeat_interleave(self.n_rep, dim=-3)
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apply_gqa = False
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backends = [SDPBackend.CUDNN_ATTENTION, SDPBackend.MATH]
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with sdpa_kernel(backends=backends):
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attn_output = F.scaled_dot_product_attention(
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queries.contiguous(),
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keys.contiguous(),
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values.contiguous(),
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attn_mask=mask.to(queries.dtype),
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enable_gqa=apply_gqa,
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)
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attn_output = attn_output.transpose(1, 2).contiguous().view(bsz, seq_len, -1)
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output = self.o_proj(attn_output)
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return output, (cached_keys, cached_values)
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########################################################
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#
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# SwiGLU (Combines MLP and Activation)
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#
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########################################################
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class SwiGLU(nn.Module):
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"""SwiGLU Activation Function with Linear Projections.
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Implements the SwiGLU activation function combined with linear transformations,
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serving as the feed-forward network in transformer blocks.
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Args:
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config (Union[ModelConfig, PicoDecoderHFConfig]): Configuration containing:
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- config.d_model: Model dimension
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343 |
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- config.activation_hidden_dim: Hidden dimension (typically 4 * d_model)
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344 |
-
|
345 |
-
References:
|
346 |
-
https://arxiv.org/abs/2002.05202
|
347 |
-
"""
|
348 |
-
|
349 |
-
def __init__(self, config: Union["ModelConfig", "PicoDecoderHFConfig"]):
|
350 |
-
super().__init__()
|
351 |
-
|
352 |
-
model_dim = config.d_model
|
353 |
-
act_hidden_dim = config.activation_hidden_dim # usually 4 * d_model
|
354 |
-
|
355 |
-
self.w_0 = nn.Linear(model_dim, act_hidden_dim, bias=False)
|
356 |
-
self.w_1 = nn.Linear(model_dim, act_hidden_dim, bias=False)
|
357 |
-
self.w_2 = nn.Linear(act_hidden_dim, model_dim, bias=False)
|
358 |
-
|
359 |
-
def forward(self, x: torch.Tensor) -> torch.Tensor:
|
360 |
-
return self.w_2(F.silu(self.w_0(x)) * self.w_1(x))
|
361 |
-
|
362 |
-
|
363 |
-
########################################################
|
364 |
-
#
|
365 |
-
# PicoDecoderBlock
|
366 |
-
#
|
367 |
-
########################################################
|
368 |
-
|
369 |
-
|
370 |
-
class PicoDecoderBlock(nn.Module):
|
371 |
-
"""Single Transformer Block with Attention and Feed-forward layers.
|
372 |
-
|
373 |
-
Implements a standard transformer block with:
|
374 |
-
- Multi-head attention with normalization and residual connection
|
375 |
-
- SwiGLU feed-forward network with normalization and residual connection
|
376 |
-
|
377 |
-
Args:
|
378 |
-
config (Union[ModelConfig, PicoDecoderHFConfig]): Model configuration; either a dataclass or
|
379 |
-
a HuggingFace PicoDecoderHFConfig
|
380 |
-
"""
|
381 |
-
|
382 |
-
def __init__(
|
383 |
-
self,
|
384 |
-
config: Union["ModelConfig", "PicoDecoderHFConfig"],
|
385 |
-
):
|
386 |
-
super().__init__()
|
387 |
-
|
388 |
-
self.attention = Attention(config)
|
389 |
-
self.swiglu = SwiGLU(config)
|
390 |
-
self.attention_norm = RMSNorm(config)
|
391 |
-
self.swiglu_norm = RMSNorm(config)
|
392 |
-
|
393 |
-
def forward(
|
394 |
-
self,
|
395 |
-
input: torch.Tensor,
|
396 |
-
mask: Optional[torch.Tensor] = None,
|
397 |
-
past_key_values: Optional[Tuple[torch.Tensor]] = None,
|
398 |
-
use_cache: bool = False,
|
399 |
-
) -> Tuple[torch.Tensor, Optional[Tuple[torch.Tensor, torch.Tensor]]]:
|
400 |
-
attention_output, cached_key_values = self.attention(
|
401 |
-
self.attention_norm(input),
|
402 |
-
mask=mask,
|
403 |
-
past_key_values=past_key_values,
|
404 |
-
use_cache=use_cache,
|
405 |
-
)
|
406 |
-
# NOTE: cached_key_values is None if use_cache is False
|
407 |
-
|
408 |
-
h = input + attention_output
|
409 |
-
out = h + self.swiglu(self.swiglu_norm(h))
|
410 |
-
return out, cached_key_values
|
411 |
-
|
412 |
-
|
413 |
-
########################################################
|
414 |
-
#
|
415 |
-
# Pico Decoder (Causal Transformer Model)
|
416 |
-
#
|
417 |
-
########################################################
|
418 |
-
|
419 |
-
|
420 |
-
class PicoDecoder(nn.Module):
|
421 |
-
"""
|
422 |
-
Pico Decoder: combines the embedding, causal decoder blocks, and output projection into a
|
423 |
-
single autoregressive model.
|
424 |
-
|
425 |
-
For more information on the model, see the classes for the modules that make up the model.
|
426 |
-
"""
|
427 |
-
|
428 |
-
def __init__(
|
429 |
-
self,
|
430 |
-
model_config: Union["ModelConfig", "PicoDecoderHFConfig"],
|
431 |
-
):
|
432 |
-
super().__init__()
|
433 |
-
self.config = model_config
|
434 |
-
|
435 |
-
self.embedding_proj = nn.Embedding(self.config.vocab_size, self.config.d_model)
|
436 |
-
self.layers = nn.ModuleList(
|
437 |
-
[PicoDecoderBlock(self.config) for _ in range(self.config.n_layers)]
|
438 |
-
)
|
439 |
-
self.output_norm = RMSNorm(self.config)
|
440 |
-
self.de_embedding_proj = nn.Linear(
|
441 |
-
self.config.d_model, self.config.vocab_size, bias=False
|
442 |
-
)
|
443 |
-
|
444 |
-
def convert_to_hf_model(self) -> "PicoDecoderHF":
|
445 |
-
"""Convert the Lightning model to a HuggingFace model."""
|
446 |
-
# Build HF config
|
447 |
-
hf_config = PicoDecoderHFConfig.from_dataclass(self.config)
|
448 |
-
|
449 |
-
# Instantiate the HF-wrapped model
|
450 |
-
hf_model = PicoDecoderHF(hf_config)
|
451 |
-
|
452 |
-
# Grab our full state dict, prefixing module names
|
453 |
-
raw_state = self.state_dict(prefix="pico_decoder.")
|
454 |
-
|
455 |
-
# Only keep keys that exist in the HF model (drops classifier_head, etc.)
|
456 |
-
hf_keys = set(hf_model.state_dict().keys())
|
457 |
-
filtered_state = {k: v for k, v in raw_state.items() if k in hf_keys}
|
458 |
-
|
459 |
-
# Load into HF model, ignore any missing keys
|
460 |
-
hf_model.load_state_dict(filtered_state, strict=False)
|
461 |
-
|
462 |
-
return hf_model
|
463 |
-
|
464 |
-
def forward(
|
465 |
-
self,
|
466 |
-
input_ids: torch.Tensor,
|
467 |
-
past_key_values: Optional[Tuple[Tuple[torch.Tensor]]] = None,
|
468 |
-
use_cache: bool = False,
|
469 |
-
return_hidden: bool = False,
|
470 |
-
) -> Tuple[torch.Tensor, Optional[Tuple[Tuple[torch.Tensor, torch.Tensor]]]]:
|
471 |
-
"""
|
472 |
-
This is the forward pass for the entire Pico model. It boils down to:
|
473 |
-
- Embedding the input ids
|
474 |
-
- Creating a causal mask
|
475 |
-
- Processing through the pico layers
|
476 |
-
- Projecting the output to logits
|
477 |
-
|
478 |
-
NOTE: One feature that might be confusing is the KV cache. The KV cache is used to speed up
|
479 |
-
generation by caching the KV pairs from previous forward passes. This is useful when doing
|
480 |
-
tasks that require generating multiple tokens conditioned on previous tokens (e.g. language
|
481 |
-
modeling, text generation, etc.). The way the KV cache is implemented is that each layer has
|
482 |
-
its own KV cache which is stored as a tuple. The whole model then stores a tuple of these
|
483 |
-
KV caches (so a tuple of tuples).
|
484 |
-
"""
|
485 |
-
|
486 |
-
seq_len = input_ids.shape[-1]
|
487 |
-
h = self.embedding_proj(input_ids)
|
488 |
-
|
489 |
-
# Calculate start position from past cached KV pairs. Remember that each layer has its
|
490 |
-
# own KV Cache. So when we index past_key_values, we need to index into the KV pairs for the
|
491 |
-
# correct layer and then for either the keys or values.
|
492 |
-
start_pos = 0 if past_key_values is None else past_key_values[0][0].shape[1]
|
493 |
-
|
494 |
-
# Create causal mask for current sequence
|
495 |
-
mask = None
|
496 |
-
if seq_len > 1:
|
497 |
-
mask = torch.full((seq_len, seq_len), float("-inf"))
|
498 |
-
mask = torch.triu(mask, diagonal=1)
|
499 |
-
|
500 |
-
# If using KV cache, extend mask to cover cached sequence length
|
501 |
-
if past_key_values is not None:
|
502 |
-
# Add zeros for cached tokens (we can attend to all of them)
|
503 |
-
mask = torch.hstack([torch.zeros((seq_len, start_pos)), mask])
|
504 |
-
|
505 |
-
mask = mask.to(h.device)
|
506 |
-
|
507 |
-
# NOTE: If we are using the cache, we need to store the cached KV pairs for each layer
|
508 |
-
# in a tuple. Each layer will have its own cached KV pair which we aggregate in a tuple.
|
509 |
-
cached_key_values = () if use_cache else None
|
510 |
-
|
511 |
-
# Process through transformer blocks
|
512 |
-
for idx, layer in enumerate(self.layers):
|
513 |
-
layer_past_key_values = (
|
514 |
-
past_key_values[idx] if past_key_values is not None else None
|
515 |
-
)
|
516 |
-
|
517 |
-
h, layer_cached_key_values = layer(
|
518 |
-
h, mask=mask, past_key_values=layer_past_key_values, use_cache=use_cache
|
519 |
-
)
|
520 |
-
|
521 |
-
if use_cache:
|
522 |
-
cached_key_values += (layer_cached_key_values,)
|
523 |
-
|
524 |
-
# Final norm and projection
|
525 |
-
h = self.output_norm(h)
|
526 |
-
|
527 |
-
if return_hidden:
|
528 |
-
return h, cached_key_values
|
529 |
-
|
530 |
-
logits = self.de_embedding_proj(h).float()
|
531 |
-
|
532 |
-
return logits, cached_key_values
|
533 |
-
|
534 |
-
|
535 |
-
########################################################
|
536 |
-
#
|
537 |
-
# HuggingFace Wrapper for the Pico Decoder model.
|
538 |
-
#
|
539 |
-
########################################################
|
540 |
-
|
541 |
-
|
542 |
-
class PicoDecoderHFConfig(PretrainedConfig):
|
543 |
-
"""Config class for the Pico Decoder HuggingFace wrapper."""
|
544 |
-
|
545 |
-
model_type = "pico_decoder"
|
546 |
-
|
547 |
-
@classmethod
|
548 |
-
def from_dict(cls, config_dict: Dict[str, Any], **kwargs) -> "PicoDecoderHFConfig":
|
549 |
-
# NOTE The typical from_dict method doesn't actually set the attributes unless they are
|
550 |
-
# defined in the constructor.
|
551 |
-
|
552 |
-
pico_config = cls(**kwargs)
|
553 |
-
|
554 |
-
# Because this class is just a wrapper around the ModelConfig dataclass, we need to do
|
555 |
-
# a little extra work to ensure that the attributes are actually set.
|
556 |
-
for key, value in config_dict.items():
|
557 |
-
setattr(pico_config, key, value)
|
558 |
-
|
559 |
-
return_unused_kwargs = kwargs.pop("return_unused_kwargs", False)
|
560 |
-
unused_kwargs = {
|
561 |
-
key: value for key, value in kwargs.items() if not hasattr(pico_config, key)
|
562 |
-
}
|
563 |
-
|
564 |
-
if return_unused_kwargs:
|
565 |
-
return pico_config, unused_kwargs
|
566 |
-
return pico_config
|
567 |
-
|
568 |
-
@classmethod
|
569 |
-
def from_dataclass(cls, model_config: "ModelConfig"):
|
570 |
-
"""Initialise from our custom config dataclass."""
|
571 |
-
return cls.from_dict(asdict(model_config))
|
572 |
-
|
573 |
-
|
574 |
-
class PicoDecoderHF(PreTrainedModel):
|
575 |
-
"""
|
576 |
-
HuggingFace wrapper for the Pico model.
|
577 |
-
|
578 |
-
Many evaluation frameworks require a model be setup as a HuggingFace model, so we provide a simple
|
579 |
-
wrapper that does just that. When we save checkpoints of the Pico model, we save both the normal
|
580 |
-
Pico model as well as the model wrapped in this HuggingFace class.
|
581 |
-
|
582 |
-
This also lets you do cool things like:
|
583 |
-
|
584 |
-
`model = AutoModelForCausalLM.from_pretrained("path/to/checkpoint")`
|
585 |
-
"""
|
586 |
-
|
587 |
-
config_class = PicoDecoderHFConfig
|
588 |
-
_no_split_modules = ["PicoBlock", "Attention", "SwiGLU", "RMSNorm"]
|
589 |
-
|
590 |
-
def __init__(self, config: PicoDecoderHFConfig):
|
591 |
-
super().__init__(config)
|
592 |
-
self.pico_decoder = PicoDecoder(config)
|
593 |
-
|
594 |
-
def forward(
|
595 |
-
self,
|
596 |
-
input_ids: torch.Tensor,
|
597 |
-
past_key_values: Optional[Tuple[Tuple[torch.Tensor]]] = None,
|
598 |
-
use_cache: bool = False,
|
599 |
-
**kwargs,
|
600 |
-
) -> Union[CausalLMOutput, CausalLMOutputWithPast]:
|
601 |
-
"""HuggingFace forward pass wrapper.
|
602 |
-
|
603 |
-
Forwards pass for the HuggingFace version of the Pico Model. Basic wrapper around the
|
604 |
-
Pico model's forward pass, and returns the output as a HuggingFace CausalLMOutput.
|
605 |
-
"""
|
606 |
-
logits, past_key_values = self.pico_decoder(
|
607 |
-
input_ids, past_key_values, use_cache
|
608 |
-
)
|
609 |
-
if use_cache:
|
610 |
-
return CausalLMOutputWithPast(
|
611 |
-
logits=logits,
|
612 |
-
past_key_values=past_key_values,
|
613 |
-
)
|
614 |
-
else:
|
615 |
-
return CausalLMOutput(
|
616 |
-
logits=logits,
|
617 |
-
)
|
618 |
-
|
619 |
-
|
620 |
-
# Register for auto classes
|
621 |
-
PicoDecoderHFConfig.register_for_auto_class()
|
622 |
-
PicoDecoderHF.register_for_auto_class("AutoModel")
|
623 |
-
PicoDecoderHF.register_for_auto_class("AutoModelForCausalLM")
|
|
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checkpoints/step_7500/special_tokens_map.json
DELETED
@@ -1,23 +0,0 @@
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1 |
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checkpoints/step_7500/tokenizer.json
DELETED
The diff for this file is too large to render.
See raw diff
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checkpoints/step_7500/tokenizer_config.json
DELETED
@@ -1,248 +0,0 @@
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