mirror of
https://github.com/ggerganov/llama.cpp.git
synced 2024-11-11 21:39:52 +00:00
28b2c996ca
* Get rope scale from HF models * Save rope scale only for linear scaling * Rewrite for clarity
1112 lines
43 KiB
Python
Executable File
1112 lines
43 KiB
Python
Executable File
#!/usr/bin/env python3
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import gguf
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import argparse
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import concurrent.futures
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import copy
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import enum
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import faulthandler
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import functools
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import io
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import itertools
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import json
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import math
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import mmap
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import pickle
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import re
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import signal
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import struct
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import sys
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import zipfile
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import numpy as np
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from abc import ABCMeta, abstractmethod
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from dataclasses import dataclass
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from pathlib import Path
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from typing import (IO, TYPE_CHECKING, Any, Callable, Dict, Iterable, List, Literal, Optional, Sequence, Tuple, TypeVar, Union)
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from sentencepiece import SentencePieceProcessor # type: ignore
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if TYPE_CHECKING:
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from typing_extensions import TypeAlias
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if hasattr(faulthandler, 'register') and hasattr(signal, 'SIGUSR1'):
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faulthandler.register(signal.SIGUSR1)
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NDArray: 'TypeAlias' = 'np.ndarray[Any, Any]'
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ARCH=gguf.MODEL_ARCH.LLAMA
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NAMES=gguf.MODEL_TENSOR_NAMES[ARCH]
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#
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# data types
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#
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@dataclass(frozen=True)
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class UnquantizedDataType:
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name: str
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DT_F16 = UnquantizedDataType('F16')
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DT_F32 = UnquantizedDataType('F32')
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DT_I32 = UnquantizedDataType('I32')
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DT_BF16 = UnquantizedDataType('BF16')
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DataType = Union[UnquantizedDataType]
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DATA_TYPE_TO_NUMPY: Dict[DataType, 'np.dtype[Any]'] = {
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DT_BF16: np.dtype(np.uint16),
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DT_F16: np.dtype(np.float16),
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DT_F32: np.dtype(np.float32),
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DT_I32: np.dtype(np.int32),
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}
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NUMPY_TYPE_TO_DATA_TYPE: Dict['np.dtype[Any]', DataType] = \
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{dtype: data_type for (data_type, dtype) in DATA_TYPE_TO_NUMPY.items()}
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SAFETENSORS_DATA_TYPES: Dict[str, DataType] = {
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'BF16': DT_BF16,
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'F16': DT_F16,
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'F32': DT_F32,
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'I32': DT_I32,
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}
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# TODO: match this with `llama_ftype`
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# TODO: rename to LLAMAFileType
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# TODO: move to `gguf.py`
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class GGMLFileType(enum.IntEnum):
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AllF32 = 0
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MostlyF16 = 1 # except 1d tensors
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def type_for_tensor(self, name: str, tensor: 'LazyTensor') -> DataType:
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if len(tensor.shape) == 1:
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# 1D tensors are always F32.
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return DT_F32
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elif self == GGMLFileType.AllF32:
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return DT_F32
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elif self == GGMLFileType.MostlyF16:
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return DT_F16
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else:
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raise ValueError(self)
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#
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# hparams loading
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#
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@dataclass
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class Params:
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n_vocab: int
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n_embd: int
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n_mult: int
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n_layer: int
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n_ctx: int
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n_ff: int
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n_head: int
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n_head_kv: int
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f_norm_eps: float
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f_rope_freq_base: Optional[float] = None
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f_rope_scale: Optional[float] = None
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ftype: Optional[GGMLFileType] = None
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# path to the directory containing the model files
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path_model: Optional['Path'] = None
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@staticmethod
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def find_n_mult(n_ff: int, n_embd: int) -> int:
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# hardcoded magic range
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for n_mult in range(8192, 1, -1):
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calc_ff = (((8*n_embd) // 3 + n_mult - 1) // n_mult)*n_mult
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if calc_ff == n_ff:
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return n_mult
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raise Exception(f"failed to find n_mult for (n_ff={n_ff}, n_embd={n_embd}).")
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@staticmethod
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def guessed(model: 'LazyModel') -> 'Params':
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# try transformer naming first
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n_vocab, n_embd = model["model.embed_tokens.weight"].shape if "model.embed_tokens.weight" in model else model["tok_embeddings.weight"].shape
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# try transformer naming first
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if "model.layers.0.self_attn.q_proj.weight" in model:
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n_layer=next(i for i in itertools.count() if f"model.layers.{i}.self_attn.q_proj.weight" not in model)
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elif "model.layers.0.self_attn.W_pack.weight" in model: # next: try baichuan naming
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n_layer=next(i for i in itertools.count() if f"model.layers.{i}.self_attn.W_pack.weight" not in model)
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else:
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n_layer=next(i for i in itertools.count() if f"layers.{i}.attention.wq.weight" not in model)
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if n_layer < 1:
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raise Exception("failed to guess 'n_layer'. This model is unknown or unsupported.\n"
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"Suggestion: provide 'config.json' of the model in the same directory containing model files.")
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n_head = n_embd // 128 # guessed
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n_mult = 256 # guessed
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# TODO: verify this
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n_ff = int(2 * (4 * n_embd) / 3)
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n_ff = n_mult * ((n_ff + n_mult - 1) // n_mult)
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return Params(
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n_vocab = n_vocab,
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n_embd = n_embd,
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n_mult = n_mult,
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n_layer = n_layer,
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n_ctx = -1,
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n_ff = n_ff,
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n_head = n_head,
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n_head_kv = n_head,
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f_norm_eps = 1e-5,
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)
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@staticmethod
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def loadHFTransformerJson(model: 'LazyModel', config_path: 'Path') -> 'Params':
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config = json.load(open(config_path))
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n_vocab = config["vocab_size"]
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n_embd = config["hidden_size"]
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n_layer = config["num_hidden_layers"]
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n_ff = config["intermediate_size"]
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n_head = config["num_attention_heads"]
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n_head_kv = config["num_key_value_heads"] if "num_key_value_heads" in config else n_head
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f_norm_eps = config["rms_norm_eps"]
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f_rope_freq_base = config["rope_theta"] if "rope_theta" in config else None
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if "rope_scaling" in config and config["rope_scaling"].get("type") == "linear":
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f_rope_scale = config["rope_scaling"].get("factor")
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else:
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f_rope_scale = None
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n_mult = Params.find_n_mult(n_ff, n_embd)
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if "max_sequence_length" in config:
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n_ctx = config["max_sequence_length"]
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elif "max_position_embeddings" in config:
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n_ctx = config["max_position_embeddings"]
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else:
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raise Exception("failed to guess 'n_ctx'. This model is unknown or unsupported.\n"
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"Suggestion: provide 'config.json' of the model in the same directory containing model files.")
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return Params(
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n_vocab = n_vocab,
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n_embd = n_embd,
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n_mult = n_mult,
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n_layer = n_layer,
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n_ctx = n_ctx,
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n_ff = n_ff,
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n_head = n_head,
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n_head_kv = n_head_kv,
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f_norm_eps = f_norm_eps,
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f_rope_freq_base = f_rope_freq_base,
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f_rope_scale = f_rope_scale,
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)
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# LLaMA v2 70B params.json
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# {"dim": 8192, "multiple_of": 4096, "ffn_dim_multiplier": 1.3, "n_heads": 64, "n_kv_heads": 8, "n_layers": 80, "norm_eps": 1e-05, "vocab_size": -1
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@staticmethod
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def loadOriginalParamsJson(model: 'LazyModel', config_path: 'Path') -> 'Params':
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config = json.load(open(config_path))
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n_vocab = config["vocab_size"] if "vocab_size" in config else -1
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n_embd = config["dim"]
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n_layer = config["n_layers"]
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n_mult = config["multiple_of"]
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n_ff = -1
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n_head = config["n_heads"]
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n_head_kv = config["n_kv_heads"] if "n_kv_heads" in config else n_head
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f_norm_eps = config["norm_eps"]
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f_rope_freq_base = config["rope_theta"] if "rope_theta" in config else None
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# hack to determine LLaMA v1 vs v2 vs CodeLlama
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if f_rope_freq_base and f_rope_freq_base == 1000000:
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# CodeLlama
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n_ctx = 16384
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elif config["norm_eps"] == 1e-05:
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# LLaMA v2
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n_ctx = 4096
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else:
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# LLaMA v1
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n_ctx = 2048
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if n_vocab == -1:
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n_vocab = model["tok_embeddings.weight"].shape[0]
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if n_ff == -1:
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n_ff = model["layers.0.feed_forward.w1.weight"].shape[0]
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return Params(
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n_vocab = n_vocab,
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n_embd = n_embd,
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n_mult = n_mult,
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n_layer = n_layer,
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n_ctx = n_ctx,
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n_ff = n_ff,
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n_head = n_head,
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n_head_kv = n_head_kv,
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f_norm_eps = f_norm_eps,
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f_rope_freq_base = f_rope_freq_base,
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)
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@staticmethod
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def load(model_plus: 'ModelPlus') -> 'Params':
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hf_config_path = model_plus.paths[0].parent / "config.json"
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orig_config_path = model_plus.paths[0].parent / "params.json"
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if hf_config_path.exists():
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params = Params.loadHFTransformerJson(model_plus.model, hf_config_path)
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elif orig_config_path.exists():
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params = Params.loadOriginalParamsJson(model_plus.model, orig_config_path)
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else:
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params = Params.guessed(model_plus.model)
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params.path_model = model_plus.paths[0].parent
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return params
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#
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# vocab
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#
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class BpeVocab:
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def __init__(self, fname_tokenizer: Path, fname_added_tokens: Optional[Path]) -> None:
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self.bpe_tokenizer = json.loads(open(str(fname_tokenizer), encoding="utf-8").read())
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added_tokens: Dict[str, int]
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if fname_added_tokens is not None:
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added_tokens = json.load(open(fname_added_tokens, encoding="utf-8"))
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else:
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added_tokens = {}
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vocab_size: int = len(self.bpe_tokenizer)
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expected_ids = list(range(vocab_size, vocab_size + len(added_tokens)))
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actual_ids = sorted(added_tokens.values())
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if expected_ids != actual_ids:
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raise Exception(f"Expected added token IDs to be sequential and start at {len(added_tokens)}; got {actual_ids}")
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items = sorted(added_tokens.items(), key=lambda text_idx: text_idx[1])
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self.added_tokens_list = [text for (text, idx) in items]
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self.vocab_size_base: int = vocab_size
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self.vocab_size: int = self.vocab_size_base + len(self.added_tokens_list)
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self.fname_tokenizer = fname_tokenizer
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self.fname_added_tokens = fname_added_tokens
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def bpe_tokens(self) -> Iterable[Tuple[bytes, float, gguf.TokenType]]:
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tokenizer = self.bpe_tokenizer
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from transformers.models.gpt2 import tokenization_gpt2
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byte_encoder = tokenization_gpt2.bytes_to_unicode()
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byte_decoder = {v: k for k, v in byte_encoder.items()}
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for i, item in enumerate(tokenizer):
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text: bytes = item.encode("utf-8")
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score: float = -i
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yield text, score, gguf.TokenType.USER_DEFINED
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def added_tokens(self) -> Iterable[Tuple[bytes, float, gguf.TokenType]]:
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for text in self.added_tokens_list:
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score = -1000.0
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yield text.encode("utf-8"), score, gguf.TokenType.USER_DEFINED
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def all_tokens(self) -> Iterable[Tuple[bytes, float, gguf.TokenType]]:
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yield from self.bpe_tokens()
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yield from self.added_tokens()
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def __repr__(self) -> str:
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return f"BpeVocab with {self.vocab_size_base} base tokens and {len(self.added_tokens_list)} added tokens>"
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class SentencePieceVocab:
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def __init__(self, fname_tokenizer: Path, fname_added_tokens: Optional[Path]) -> None:
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self.sentencepiece_tokenizer = SentencePieceProcessor(str(fname_tokenizer))
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added_tokens: Dict[str, int]
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if fname_added_tokens is not None:
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added_tokens = json.load(open(fname_added_tokens, encoding="utf-8"))
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else:
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added_tokens = {}
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vocab_size: int = self.sentencepiece_tokenizer.vocab_size()
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expected_ids = list(range(vocab_size, vocab_size + len(added_tokens)))
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actual_ids = sorted(added_tokens.values())
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if expected_ids != actual_ids:
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raise Exception(f"Expected added token IDs to be sequential and start at {len(added_tokens)}; got {actual_ids}")
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items = sorted(added_tokens.items(), key=lambda text_idx: text_idx[1])
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self.added_tokens_list = [text for (text, idx) in items]
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self.vocab_size_base: int = vocab_size
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self.vocab_size: int = self.vocab_size_base + len(self.added_tokens_list)
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self.fname_tokenizer = fname_tokenizer
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self.fname_added_tokens = fname_added_tokens
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def sentencepiece_tokens(self) -> Iterable[Tuple[bytes, float, gguf.TokenType]]:
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tokenizer = self.sentencepiece_tokenizer
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for i in range(tokenizer.vocab_size()):
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piece = tokenizer.id_to_piece(i)
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text: bytes = piece.encode("utf-8")
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score: float = tokenizer.get_score(i)
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toktype = gguf.TokenType.NORMAL
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if tokenizer.is_unknown(i):
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toktype = gguf.TokenType.UNKNOWN
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if tokenizer.is_control(i):
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toktype = gguf.TokenType.CONTROL
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# NOTE: I think added_tokens are user defined.
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# ref: https://github.com/google/sentencepiece/blob/master/src/sentencepiece_model.proto
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# if tokenizer.is_user_defined(i): toktype = gguf.TokenType.USER_DEFINED
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if tokenizer.is_unused(i):
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toktype = gguf.TokenType.UNUSED
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if tokenizer.is_byte(i):
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toktype = gguf.TokenType.BYTE
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yield text, score, toktype
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def added_tokens(self) -> Iterable[Tuple[bytes, float, gguf.TokenType]]:
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for text in self.added_tokens_list:
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score = -1000.0
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yield text.encode("utf-8"), score, gguf.TokenType.USER_DEFINED
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def all_tokens(self) -> Iterable[Tuple[bytes, float, gguf.TokenType]]:
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yield from self.sentencepiece_tokens()
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yield from self.added_tokens()
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def __repr__(self) -> str:
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return f"<SentencePieceVocab with {self.vocab_size_base} base tokens and {len(self.added_tokens_list)} added tokens>"
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Vocab = Union[BpeVocab, SentencePieceVocab]
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#
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# data loading
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# TODO: reuse (probably move to gguf.py?)
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#
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def permute(weights: NDArray, n_head: int, n_head_kv: int) -> NDArray:
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#print( "permute debug " + str(weights.shape[0]) + " x " + str(weights.shape[1]) + " nhead " + str(n_head) + " nheadkv " + str(n_kv_head) )
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if n_head_kv is not None and n_head != n_head_kv:
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n_head //= n_head_kv
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return (weights.reshape(n_head, 2, weights.shape[0] // n_head // 2, *weights.shape[1:])
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.swapaxes(1, 2)
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.reshape(weights.shape))
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class Tensor(metaclass=ABCMeta):
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data_type: DataType
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@abstractmethod
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def astype(self, data_type: DataType) -> 'Tensor': ...
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@abstractmethod
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def permute(self, n_head: int, n_head_kv: int) -> 'Tensor': ...
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@abstractmethod
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def permute_part(self, n_part: int, n_head: int) -> 'UnquantizedTensor': ...
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@abstractmethod
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def part(self, n_part: int) -> 'UnquantizedTensor': ...
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@abstractmethod
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def to_ggml(self) -> 'GGMLCompatibleTensor': ...
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def bf16_to_fp32(bf16_arr: np.ndarray) -> np.ndarray:
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assert bf16_arr.dtype == np.uint16, f"Input array should be of dtype uint16, but got {bf16_arr.dtype}"
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fp32_arr = bf16_arr.astype(np.uint32) << 16
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return fp32_arr.view(np.float32)
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class UnquantizedTensor(Tensor):
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def __init__(self, ndarray: NDArray) -> None:
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assert isinstance(ndarray, np.ndarray)
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self.ndarray = ndarray
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self.data_type = NUMPY_TYPE_TO_DATA_TYPE[ndarray.dtype]
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def astype(self, data_type: DataType) -> Tensor:
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dtype = DATA_TYPE_TO_NUMPY[data_type]
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if self.data_type == DT_BF16:
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self.ndarray = bf16_to_fp32(self.ndarray)
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return UnquantizedTensor(self.ndarray.astype(dtype))
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def to_ggml(self) -> 'UnquantizedTensor':
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return self
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def permute_part(self, n_part: int, n_head: int) -> 'UnquantizedTensor':
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r = self.ndarray.shape[0] // 3
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return UnquantizedTensor(permute(self.ndarray[r * n_part : r * n_part + r, ...], n_head))
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def part(self, n_part: int) -> 'UnquantizedTensor':
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r = self.ndarray.shape[0] // 3
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return UnquantizedTensor(self.ndarray[r * n_part : r * n_part + r, ...])
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def permute(self, n_head: int, n_head_kv: int) -> 'UnquantizedTensor':
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return UnquantizedTensor(permute(self.ndarray, n_head, n_head_kv))
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def load_unquantized(lazy_tensor: 'LazyTensor', expected_dtype: Any = None, convert: bool = False) -> NDArray:
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tensor = lazy_tensor.load()
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assert isinstance(tensor, UnquantizedTensor)
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# double-check:
|
|
actual_shape = list(tensor.ndarray.shape)
|
|
assert actual_shape == lazy_tensor.shape, (actual_shape, lazy_tensor.shape)
|
|
if expected_dtype is not None and expected_dtype != tensor.ndarray.dtype:
|
|
if convert:
|
|
tensor.ndarray = tensor.ndarray.astype(expected_dtype)
|
|
else:
|
|
raise ValueError(f'expected this tensor to have dtype {expected_dtype}, got {tensor.ndarray.dtype}')
|
|
|
|
return tensor.ndarray
|
|
|
|
|
|
GGMLCompatibleTensor = Union[UnquantizedTensor]
|
|
|
|
|
|
class DeferredPermutedTensor(Tensor):
|
|
def __init__(self, base: Tensor, n_head: int, n_head_kv: int) -> None:
|
|
self.base = base
|
|
self.n_head = n_head
|
|
self.data_type = self.base.data_type
|
|
|
|
def astype(self, data_type: DataType) -> Tensor:
|
|
return self.base.astype(data_type).permute(self.n_head, self.n_head_kv)
|
|
|
|
def to_ggml(self) -> GGMLCompatibleTensor:
|
|
return self.base.to_ggml().permute(self.n_head, self.n_head_kv)
|
|
|
|
def permute(self, n_head: int, n_head_kv: int) -> Tensor:
|
|
raise Exception("shouldn't permute twice")
|
|
|
|
|
|
@dataclass
|
|
class LazyTensor:
|
|
_load: Callable[[], Tensor]
|
|
shape: List[int]
|
|
data_type: DataType
|
|
description: str
|
|
|
|
def load(self) -> Tensor:
|
|
ret = self._load()
|
|
assert ret.data_type == self.data_type, (self.data_type, ret.data_type, self.description)
|
|
return ret
|
|
|
|
def astype(self, data_type: DataType) -> 'LazyTensor':
|
|
self.validate_conversion_to(data_type)
|
|
|
|
def load() -> Tensor:
|
|
return self.load().astype(data_type)
|
|
return LazyTensor(load, self.shape, data_type, f'convert({data_type}) {self.description}')
|
|
|
|
def validate_conversion_to(self, data_type: DataType) -> None:
|
|
if data_type == self.data_type:
|
|
return
|
|
|
|
|
|
LazyModel = Dict[str, LazyTensor]
|
|
|
|
|
|
@dataclass
|
|
class ModelPlus:
|
|
model: LazyModel
|
|
paths: List[Path] # Where this was read from.
|
|
format: Literal['ggml', 'torch', 'safetensors']
|
|
vocab: Optional[Vocab] # For GGML models (which have vocab built in), the vocab.
|
|
|
|
|
|
def merge_sharded(models: List[LazyModel]) -> LazyModel:
|
|
# Original LLaMA models have each file contain one part of each tensor.
|
|
# Use a dict instead of a set to preserve order.
|
|
names = {name: None for model in models for name in model}
|
|
|
|
def convert(name: str) -> LazyTensor:
|
|
lazy_tensors: List[LazyTensor] = [model[name] for model in models]
|
|
if len(lazy_tensors) == 1:
|
|
# only one file; don't go through this procedure since there might
|
|
# be quantized tensors
|
|
return lazy_tensors[0]
|
|
if len(lazy_tensors[0].shape) == 1:
|
|
# the tensor is just duplicated in every file
|
|
return lazy_tensors[0]
|
|
if name.startswith('tok_embeddings.') or \
|
|
name.endswith('.attention.wo.weight') or \
|
|
name.endswith('.feed_forward.w2.weight'):
|
|
# split by columns
|
|
axis = 1
|
|
else:
|
|
# split by rows
|
|
axis = 0
|
|
concatenated_shape = list(lazy_tensors[0].shape)
|
|
concatenated_shape[axis] = sum(tensor.shape[axis] for tensor in lazy_tensors)
|
|
|
|
def load() -> UnquantizedTensor:
|
|
ndarrays = [load_unquantized(tensor) for tensor in lazy_tensors]
|
|
concatenated: NDArray = np.concatenate(ndarrays, axis=axis)
|
|
return UnquantizedTensor(concatenated)
|
|
description = 'concatenated[[' + '] | ['.join(lt.description for lt in lazy_tensors) + ']]'
|
|
return LazyTensor(load, concatenated_shape, lazy_tensors[0].data_type, description)
|
|
return {name: convert(name) for name in names}
|
|
|
|
|
|
def merge_multifile_models(models_plus: List[ModelPlus]) -> ModelPlus:
|
|
formats = set(mp.format for mp in models_plus)
|
|
assert len(formats) == 1, "different formats?"
|
|
format = formats.pop()
|
|
paths = [path for mp in models_plus for path in mp.paths]
|
|
# Use the first non-None vocab, if any.
|
|
try:
|
|
vocab = next(mp.vocab for mp in models_plus if mp.vocab is not None)
|
|
except StopIteration:
|
|
vocab = None
|
|
|
|
if any("model.embed_tokens.weight" in mp.model for mp in models_plus):
|
|
# Transformers models put different tensors in different files, but
|
|
# don't split indivdual tensors between files.
|
|
model: LazyModel = {}
|
|
for mp in models_plus:
|
|
model.update(mp.model)
|
|
else:
|
|
model = merge_sharded([mp.model for mp in models_plus])
|
|
|
|
return ModelPlus(model, paths, format, vocab)
|
|
|
|
|
|
def permute_lazy(lazy_tensor: LazyTensor, n_head: int, n_head_kv: int) -> LazyTensor:
|
|
def load() -> Tensor:
|
|
return lazy_tensor.load().permute(n_head, n_head_kv)
|
|
return LazyTensor(load, lazy_tensor.shape, lazy_tensor.data_type, f'permute({n_head}, {n_head_kv}) ' + lazy_tensor.description)
|
|
|
|
def permute_part_lazy(lazy_tensor: LazyTensor, n_part: int, n_head: int) -> LazyTensor:
|
|
def load() -> Tensor:
|
|
return lazy_tensor.load().permute_part(n_part, n_head)
|
|
s = lazy_tensor.shape.copy()
|
|
s[0] = s[0] // 3
|
|
return LazyTensor(load, s, lazy_tensor.data_type, f'permute({n_head}) ' + lazy_tensor.description)
|
|
|
|
def part_lazy(lazy_tensor: LazyTensor, n_part: int) -> LazyTensor:
|
|
def load() -> Tensor:
|
|
return lazy_tensor.load().part(n_part)
|
|
s = lazy_tensor.shape.copy()
|
|
s[0] = s[0] // 3
|
|
return LazyTensor(load, s, lazy_tensor.data_type, 'part ' + lazy_tensor.description)
|
|
|
|
|
|
# Functionality that simulates `torch.load` but where individual tensors are
|
|
# only loaded into memory on demand, not all at once.
|
|
# PyTorch can't do this natively as of time of writing:
|
|
# - https://github.com/pytorch/pytorch/issues/64327
|
|
# This allows us to de-shard without multiplying RAM usage, and also
|
|
# conveniently drops the PyTorch dependency (though we still need numpy).
|
|
|
|
|
|
@dataclass
|
|
class LazyStorageKind:
|
|
data_type: DataType
|
|
|
|
|
|
@dataclass
|
|
class LazyStorage:
|
|
load: Callable[[int, int], NDArray]
|
|
kind: LazyStorageKind
|
|
description: str
|
|
|
|
|
|
class LazyUnpickler(pickle.Unpickler):
|
|
def __init__(self, fp: IO[bytes], data_base_path: str, zip_file: zipfile.ZipFile):
|
|
super().__init__(fp)
|
|
self.data_base_path = data_base_path
|
|
self.zip_file = zip_file
|
|
|
|
def persistent_load(self, pid: Any) -> Any:
|
|
assert pid[0] == 'storage'
|
|
assert isinstance(pid[1], LazyStorageKind)
|
|
data_type = pid[1].data_type
|
|
filename_stem = pid[2]
|
|
filename = self.data_base_path + '/' + filename_stem
|
|
info = self.zip_file.getinfo(filename)
|
|
|
|
def load(offset: int, elm_count: int) -> NDArray:
|
|
dtype = DATA_TYPE_TO_NUMPY.get(data_type)
|
|
if dtype is None:
|
|
raise Exception("tensor stored in unsupported format")
|
|
fp = self.zip_file.open(info)
|
|
fp.seek(offset * dtype.itemsize)
|
|
size = elm_count * dtype.itemsize
|
|
data = fp.read(size)
|
|
assert len(data) == size
|
|
return np.frombuffer(data, dtype)
|
|
description = f'storage data_type={data_type} path-in-zip={filename} path={self.zip_file.filename}'
|
|
return LazyStorage(load=load, kind=pid[1], description=description)
|
|
|
|
# @staticmethod
|
|
def lazy_rebuild_tensor_v2(storage: Any, storage_offset: Any, size: Any, stride: Any,
|
|
# pyright: ignore[reportSelfClsParameterName]
|
|
requires_grad: Any, backward_hooks: Any, metadata: Any = None) -> LazyTensor:
|
|
assert isinstance(storage, LazyStorage)
|
|
|
|
def load() -> UnquantizedTensor:
|
|
elm_count = stride[0] * size[0]
|
|
return UnquantizedTensor(storage.load(storage_offset, elm_count).reshape(size))
|
|
description = f'pickled storage_offset={storage_offset} in {storage.description}'
|
|
return LazyTensor(load, list(size), storage.kind.data_type, description)
|
|
|
|
# @staticmethod
|
|
def rebuild_from_type_v2(func, new_type, args, state):
|
|
return func(*args)
|
|
|
|
CLASSES: Dict[Any, Any] = {
|
|
('torch._tensor', '_rebuild_from_type_v2'): rebuild_from_type_v2,
|
|
('torch._utils', '_rebuild_tensor_v2'): lazy_rebuild_tensor_v2,
|
|
('torch', 'BFloat16Storage'): LazyStorageKind(DT_BF16),
|
|
('torch', 'HalfStorage'): LazyStorageKind(DT_F16),
|
|
('torch', 'FloatStorage'): LazyStorageKind(DT_F32),
|
|
('torch', 'IntStorage'): LazyStorageKind(DT_I32),
|
|
('torch', 'Tensor'): LazyTensor,
|
|
}
|
|
|
|
def find_class(self, module: str, name: str) -> Any:
|
|
if not module.startswith('torch'):
|
|
return super().find_class(module, name)
|
|
return self.CLASSES[(module, name)]
|
|
|
|
|
|
def lazy_load_torch_file(outer_fp: IO[bytes], path: Path) -> ModelPlus:
|
|
zf = zipfile.ZipFile(outer_fp)
|
|
pickle_paths = [name for name in zf.namelist() if name.endswith('.pkl')]
|
|
assert len(pickle_paths) == 1, pickle_paths
|
|
pickle_fp = zf.open(pickle_paths[0], 'r')
|
|
unpickler = LazyUnpickler(pickle_fp,
|
|
data_base_path=pickle_paths[0][:-4],
|
|
zip_file=zf)
|
|
model = unpickler.load()
|
|
as_dict = dict(model.items())
|
|
return ModelPlus(model=as_dict, paths=[path], format='torch', vocab=None)
|
|
|
|
|
|
def lazy_load_safetensors_file(fp: IO[bytes], path: Path) -> ModelPlus:
|
|
header_size, = struct.unpack('<Q', fp.read(8))
|
|
header: Dict[str, Dict[str, Any]] = json.loads(fp.read(header_size))
|
|
# Use mmap for the actual data to avoid race conditions with the file offset.
|
|
mapped = memoryview(mmap.mmap(fp.fileno(), 0, access=mmap.ACCESS_READ))
|
|
byte_buf = mapped[8 + header_size:]
|
|
|
|
def convert(info: Dict[str, Any]) -> LazyTensor:
|
|
data_type = SAFETENSORS_DATA_TYPES[info['dtype']]
|
|
numpy_dtype = DATA_TYPE_TO_NUMPY[data_type]
|
|
shape: List[int] = info['shape']
|
|
begin, end = info['data_offsets']
|
|
assert 0 <= begin <= end <= len(byte_buf)
|
|
assert end - begin == math.prod(shape) * numpy_dtype.itemsize
|
|
buf = byte_buf[begin:end]
|
|
|
|
def load() -> UnquantizedTensor:
|
|
return UnquantizedTensor(np.frombuffer(buf, dtype=numpy_dtype).reshape(shape))
|
|
description = f'safetensors begin={begin} end={end} type={data_type} path={path}'
|
|
return LazyTensor(load, shape, data_type, description)
|
|
model = {name: convert(info) for (name, info) in header.items() if name != '__metadata__'}
|
|
return ModelPlus(model=model, paths=[path], format='safetensors', vocab=None)
|
|
|
|
|
|
def must_read(fp: IO[bytes], length: int) -> bytes:
|
|
ret = fp.read(length)
|
|
if len(ret) < length:
|
|
raise Exception("unexpectedly reached end of file")
|
|
return ret
|
|
|
|
|
|
@functools.lru_cache(maxsize=None)
|
|
def lazy_load_file(path: Path) -> ModelPlus:
|
|
fp = open(path, 'rb')
|
|
first8 = fp.read(8)
|
|
fp.seek(0)
|
|
if first8[:2] == b'PK':
|
|
# A zip file, i.e. PyTorch format
|
|
return lazy_load_torch_file(fp, path)
|
|
elif struct.unpack('<Q', first8)[0] < 16 * 1024 * 1024:
|
|
# Probably safetensors
|
|
return lazy_load_safetensors_file(fp, path)
|
|
else:
|
|
raise ValueError(f"unknown format: {path}")
|
|
|
|
|
|
In = TypeVar('In')
|
|
Out = TypeVar('Out')
|
|
|
|
def bounded_parallel_map(func: Callable[[In], Out], iterable: Iterable[In], concurrency: int) -> Iterable[Out]:
|
|
'''Parallel map, but with backpressure. If the caller doesn't call `next`
|
|
fast enough, this will stop calling `func` at some point rather than
|
|
letting results pile up in memory. Specifically, there is a max of one
|
|
output value buffered per thread.'''
|
|
with concurrent.futures.ThreadPoolExecutor() as executor:
|
|
futures: List[concurrent.futures.Future[Out]] = []
|
|
items_rev = list(iterable)[::-1]
|
|
for i in range(min(concurrency, len(items_rev))):
|
|
futures.append(executor.submit(func, items_rev.pop()))
|
|
while futures:
|
|
result = futures.pop(0).result()
|
|
if items_rev:
|
|
futures.append(executor.submit(func, items_rev.pop()))
|
|
yield result
|
|
|
|
|
|
def check_vocab_size(params: Params, vocab: Vocab) -> None:
|
|
if params.n_vocab != vocab.vocab_size:
|
|
assert isinstance(vocab, BpeVocab) or isinstance(vocab, SentencePieceVocab)
|
|
if params.n_vocab == vocab.vocab_size_base:
|
|
print("Ignoring added_tokens.json since model matches vocab size without it.")
|
|
vocab.added_tokens_list = []
|
|
vocab.vocab_size = vocab.vocab_size_base
|
|
return
|
|
msg = f"Vocab size mismatch (model has {params.n_vocab}, but {vocab.fname_tokenizer}"
|
|
if vocab.fname_added_tokens is not None:
|
|
msg += f" combined with {vocab.fname_added_tokens}"
|
|
msg += f" has {vocab.vocab_size})."
|
|
if vocab.vocab_size < params.n_vocab < vocab.vocab_size + 20 and vocab.fname_added_tokens is None:
|
|
msg += f" Most likely you are missing added_tokens.json (should be in {vocab.fname_tokenizer.parent})."
|
|
raise Exception(msg)
|
|
|
|
|
|
class OutputFile:
|
|
def __init__(self, fname_out: Path) -> None:
|
|
self.gguf = gguf.GGUFWriter(fname_out, gguf.MODEL_ARCH_NAMES[ARCH])
|
|
|
|
def add_meta_arch(self, params: Params) -> None:
|
|
name = "LLaMA"
|
|
if (params.n_ctx == 4096):
|
|
name = "LLaMA v2"
|
|
if params.path_model:
|
|
name = str(params.path_model.parent).split('/')[-1]
|
|
|
|
self.gguf.add_name (name)
|
|
self.gguf.add_context_length (params.n_ctx)
|
|
self.gguf.add_embedding_length (params.n_embd)
|
|
self.gguf.add_block_count (params.n_layer)
|
|
self.gguf.add_feed_forward_length (params.n_ff)
|
|
self.gguf.add_rope_dimension_count(params.n_embd // params.n_head)
|
|
self.gguf.add_head_count (params.n_head)
|
|
self.gguf.add_head_count_kv (params.n_head_kv)
|
|
self.gguf.add_layer_norm_rms_eps (params.f_norm_eps)
|
|
|
|
if params.f_rope_freq_base:
|
|
self.gguf.add_rope_freq_base(params.f_rope_freq_base)
|
|
|
|
if params.f_rope_scale:
|
|
self.gguf.add_rope_scale_linear(params.f_rope_scale)
|
|
|
|
if params.ftype:
|
|
self.gguf.add_file_type(params.ftype)
|
|
|
|
def add_meta_vocab(self, vocab: Vocab) -> None:
|
|
tokens = []
|
|
scores = []
|
|
toktypes = []
|
|
# NOTE: `all_tokens` returns the the base vocabulary and added tokens
|
|
# TODO: add special tokens?
|
|
for text, score, toktype in vocab.all_tokens():
|
|
tokens.append(text)
|
|
scores.append(score)
|
|
toktypes.append(toktype)
|
|
|
|
self.gguf.add_tokenizer_model("llama")
|
|
self.gguf.add_token_list(tokens)
|
|
self.gguf.add_token_scores(scores)
|
|
self.gguf.add_token_types(toktypes)
|
|
|
|
def add_tensor_info(self, name: str, tensor: LazyTensor) -> None:
|
|
n_elements = 1
|
|
for dim in tensor.shape:
|
|
n_elements *= dim
|
|
data_type = DATA_TYPE_TO_NUMPY[tensor.data_type]
|
|
data_nbytes = n_elements * data_type.itemsize
|
|
self.gguf.add_tensor_info(name, tensor.shape, data_type, data_nbytes)
|
|
|
|
def write_meta(self) -> None:
|
|
self.gguf.write_header_to_file()
|
|
self.gguf.write_kv_data_to_file()
|
|
|
|
def write_tensor_info(self) -> None:
|
|
self.gguf.write_ti_data_to_file()
|
|
|
|
def close(self) -> None:
|
|
self.gguf.close()
|
|
|
|
@staticmethod
|
|
def write_vocab_only(fname_out: Path, params: Params, vocab: Vocab) -> None:
|
|
check_vocab_size(params, vocab)
|
|
|
|
of = OutputFile(fname_out)
|
|
|
|
# meta data
|
|
of.add_meta_arch(params)
|
|
of.add_meta_vocab(vocab)
|
|
of.write_meta()
|
|
|
|
of.close()
|
|
|
|
@staticmethod
|
|
def write_all(fname_out: Path, params: Params, model: LazyModel, vocab: Vocab) -> None:
|
|
check_vocab_size(params, vocab)
|
|
|
|
of = OutputFile(fname_out)
|
|
|
|
# meta data
|
|
of.add_meta_arch(params)
|
|
of.add_meta_vocab(vocab)
|
|
|
|
# tensor info
|
|
for name, lazy_tensor in model.items():
|
|
of.add_tensor_info(name, lazy_tensor)
|
|
|
|
of.write_meta()
|
|
of.write_tensor_info()
|
|
|
|
def do_item(item: Tuple[str, LazyTensor]) -> NDArray:
|
|
name, lazy_tensor = item
|
|
return lazy_tensor.load().to_ggml().ndarray
|
|
|
|
# tensor data
|
|
ndarrays = bounded_parallel_map(do_item, model.items(), concurrency=8)
|
|
for i, ((name, lazy_tensor), ndarray) in enumerate(zip(model.items(), ndarrays)):
|
|
size = ' x '.join(f"{dim:6d}" for dim in lazy_tensor.shape)
|
|
padi = len(str(len(model)))
|
|
print(f"[{i+1:{padi}d}/{len(model)}] Writing tensor {name:38s} | size {size:16} | type {lazy_tensor.data_type}")
|
|
of.gguf.write_tensor_data(ndarray)
|
|
|
|
of.close()
|
|
|
|
def pick_output_type(model: LazyModel, output_type_str: Optional[str]) -> GGMLFileType:
|
|
wq_type = model[NAMES[gguf.MODEL_TENSOR.ATTN_Q].format(bid=0)+".weight"].data_type
|
|
|
|
if output_type_str == "f32" or (output_type_str is None and wq_type == DT_F32):
|
|
return GGMLFileType.AllF32
|
|
if output_type_str == "f16" or (output_type_str is None and wq_type in (DT_F16, DT_BF16)):
|
|
return GGMLFileType.MostlyF16
|
|
|
|
name_to_type = {name: lazy_tensor.data_type for (name, lazy_tensor) in model.items()}
|
|
|
|
raise Exception(f"Unexpected combination of types: {name_to_type}")
|
|
|
|
def convert_to_output_type(model: LazyModel, output_type: GGMLFileType) -> LazyModel:
|
|
return {name: tensor.astype(output_type.type_for_tensor(name, tensor))
|
|
for (name, tensor) in model.items()}
|
|
|
|
def convert_model_names(model: LazyModel, params: Params) -> LazyModel:
|
|
tmap = gguf.get_tensor_name_map(ARCH, params.n_layer)
|
|
|
|
tmp = model
|
|
|
|
# HF models permut or pack some of the tensors, so we need to undo that
|
|
for i in itertools.count():
|
|
if f"model.layers.{i}.self_attn.q_proj.weight" in model:
|
|
print(f"Permuting layer {i}")
|
|
tmp[f"model.layers.{i}.self_attn.q_proj.weight"] = permute_lazy(model[f"model.layers.{i}.self_attn.q_proj.weight"], params.n_head, params.n_head)
|
|
tmp[f"model.layers.{i}.self_attn.k_proj.weight"] = permute_lazy(model[f"model.layers.{i}.self_attn.k_proj.weight"], params.n_head, params.n_head_kv)
|
|
#tmp[f"model.layers.{i}.self_attn.v_proj.weight"] = model[f"model.layers.{i}.self_attn.v_proj.weight"]
|
|
elif f"model.layers.{i}.self_attn.W_pack.weight" in model:
|
|
print(f"Unpacking and permuting layer {i}")
|
|
tmp[f"model.layers.{i}.self_attn.q_proj.weight"] = permute_part_lazy(model[f"model.layers.{i}.self_attn.W_pack.weight"], 0, params.n_head, params.n_head)
|
|
tmp[f"model.layers.{i}.self_attn.k_proj.weight"] = permute_part_lazy(model[f"model.layers.{i}.self_attn.W_pack.weight"], 1, params.n_head, params.n_head_kv)
|
|
tmp[f"model.layers.{i}.self_attn.v_proj.weight"] = part_lazy (model[f"model.layers.{i}.self_attn.W_pack.weight"], 2)
|
|
else:
|
|
break
|
|
|
|
out: LazyModel = {}
|
|
for name, lazy_tensor in model.items():
|
|
name_new = name
|
|
|
|
if name in tmap:
|
|
name_new = tmap[name]
|
|
elif name.endswith(".weight") and name[:-7] in tmap:
|
|
name_new = tmap[name[:-7]] + ".weight"
|
|
elif name.endswith(".bias") and name[:-5] in tmap:
|
|
name_new = tmap[name[:-5]] + ".bias"
|
|
else:
|
|
raise Exception(f"Unexpected tensor name: {name}")
|
|
|
|
if gguf.should_skip_tensor_TMP(ARCH, params.n_layer, name_new):
|
|
print(f"skipping tensor {name_new}")
|
|
continue
|
|
else:
|
|
print(f"{name:48s} -> {name_new:40s} | {lazy_tensor.data_type} | {lazy_tensor.shape}")
|
|
out[name_new] = lazy_tensor
|
|
|
|
return out
|
|
|
|
def nth_multifile_path(path: Path, n: int) -> Optional[Path]:
|
|
'''Given any path belonging to a multi-file model (e.g. foo.bin.1), return
|
|
the nth path in the model.
|
|
'''
|
|
# Support the following patterns:
|
|
patterns: List[Tuple[str, str]] = [
|
|
# - x.00.pth, x.01.pth, etc.
|
|
(r'\.[0-9]{2}\.pth$', f'.{n:02}.pth'),
|
|
# - x-00001-of-00002.bin, x-00002-of-00002.bin, etc.
|
|
(r'-[0-9]{5}-of-(.*)$', fr'-{n:05}-of-\1'),
|
|
# x.bin, x.bin.1, etc.
|
|
(r'(\.[0-9]+)?$', r'\1' if n == 0 else fr'\1.{n}')
|
|
]
|
|
for regex, replacement in patterns:
|
|
if re.search(regex, path.name):
|
|
new_path = path.with_name(re.sub(regex, replacement, path.name))
|
|
if new_path.exists():
|
|
return new_path
|
|
return None
|
|
|
|
|
|
def find_multifile_paths(path: Path) -> List[Path]:
|
|
'''Given any path belonging to a multi-file model (e.g. foo.bin.1), return
|
|
the whole list of paths in the model.
|
|
'''
|
|
ret: List[Path] = []
|
|
for i in itertools.count():
|
|
nth_path = nth_multifile_path(path, i)
|
|
if nth_path is None:
|
|
break
|
|
ret.append(nth_path)
|
|
if not ret:
|
|
# No matches. This should only happen if the file was named, e.g.,
|
|
# foo.0, and there was no file named foo. Oh well, try to process it
|
|
# as a single file.
|
|
return [path]
|
|
return ret
|
|
|
|
|
|
def load_some_model(path: Path) -> ModelPlus:
|
|
'''Load a model of any supported format.'''
|
|
# Be extra-friendly and accept either a file or a directory:
|
|
if path.is_dir():
|
|
# Check if it's a set of safetensors files first
|
|
files = list(path.glob("model-00001-of-*.safetensors"))
|
|
if not files:
|
|
# Try the PyTorch patterns too, with lower priority
|
|
globs = ["consolidated.00.pth", "pytorch_model-00001-of-*.bin", "*.pt", "pytorch_model.bin"]
|
|
files = [file for glob in globs for file in path.glob(glob)]
|
|
if not files:
|
|
raise Exception(f"Can't find model in directory {path}")
|
|
if len(files) > 1:
|
|
raise Exception(f"Found multiple models in {path}, not sure which to pick: {files}")
|
|
path = files[0]
|
|
|
|
paths = find_multifile_paths(path)
|
|
models_plus: List[ModelPlus] = []
|
|
for path in paths:
|
|
print(f"Loading model file {path}")
|
|
models_plus.append(lazy_load_file(path))
|
|
|
|
model_plus = merge_multifile_models(models_plus)
|
|
return model_plus
|
|
|
|
|
|
def load_vocab(path: Path, vocabtype: Optional[str]) -> Union[BpeVocab, SentencePieceVocab]:
|
|
# Be extra-friendly and accept either a file or a directory. Also, if it's
|
|
# a directory, it might be the model directory, and tokenizer.model might
|
|
# be in the parent of that.
|
|
if path.is_dir():
|
|
vocab_file = "tokenizer.model"
|
|
if vocabtype == 'bpe':
|
|
vocab_file = "vocab.json"
|
|
path2 = path / vocab_file
|
|
# Use `.parent` instead of /.. to handle the symlink case better.
|
|
path3 = path.parent / vocab_file
|
|
if path2.exists():
|
|
path = path2
|
|
elif path3.exists():
|
|
path = path3
|
|
else:
|
|
raise FileNotFoundError(
|
|
f"Could not find {vocab_file} in {path} or its parent; "
|
|
"if it's in another directory, pass the directory as --vocab-dir")
|
|
|
|
print(f"Loading vocab file '{path}', type '{vocabtype}'")
|
|
|
|
added_tokens_path = path.parent / "added_tokens.json"
|
|
if vocabtype == "bpe":
|
|
return BpeVocab(path, added_tokens_path if added_tokens_path.exists() else None)
|
|
elif vocabtype == "spm":
|
|
return SentencePieceVocab(path, added_tokens_path if added_tokens_path.exists() else None)
|
|
else:
|
|
raise ValueError(f"Unsupported vocabulary type {vocabtype}")
|
|
|
|
|
|
def default_outfile(model_paths: List[Path], file_type: GGMLFileType) -> Path:
|
|
namestr = {
|
|
GGMLFileType.AllF32: "f32",
|
|
GGMLFileType.MostlyF16: "f16",
|
|
}[file_type]
|
|
ret = model_paths[0].parent / f"ggml-model-{namestr}.gguf"
|
|
if ret in model_paths:
|
|
sys.stderr.write(
|
|
f"Error: Default output path ({ret}) would overwrite the input. "
|
|
"Please explicitly specify a path using --outfile.\n")
|
|
sys.exit(1)
|
|
return ret
|
|
|
|
|
|
def do_dump_model(model_plus: ModelPlus) -> None:
|
|
print(f"model_plus.paths = {model_plus.paths!r}")
|
|
print(f"model_plus.format = {model_plus.format!r}")
|
|
print(f"model_plus.vocab = {model_plus.vocab!r}")
|
|
for name, lazy_tensor in model_plus.model.items():
|
|
print(f"{name}: shape={lazy_tensor.shape} type={lazy_tensor.data_type}; {lazy_tensor.description}")
|
|
|
|
|
|
def main(args_in: Optional[List[str]] = None) -> None:
|
|
parser = argparse.ArgumentParser(description="Convert a LLaMa model to a GGML compatible file")
|
|
parser.add_argument("--dump", action="store_true", help="don't convert, just show what's in the model")
|
|
parser.add_argument("--dump-single", action="store_true", help="don't convert, just show what's in a single model file")
|
|
parser.add_argument("--vocab-only", action="store_true", help="extract only the vocab")
|
|
parser.add_argument("--outtype", choices=["f32", "f16"], help="output format (default: based on input)")
|
|
parser.add_argument("--vocab-dir", type=Path, help="directory containing tokenizer.model, if separate from model file")
|
|
parser.add_argument("--outfile", type=Path, help="path to write to; default: based on input")
|
|
parser.add_argument("model", type=Path, help="directory containing model file, or model file itself (*.pth, *.pt, *.bin)")
|
|
parser.add_argument("--vocabtype", choices=["spm", "bpe"], help="vocab format (default: spm)", default="spm")
|
|
parser.add_argument("--ctx", type=int, help="model training context (default: based on input)")
|
|
args = parser.parse_args(args_in)
|
|
|
|
if args.dump_single:
|
|
model_plus = lazy_load_file(args.model)
|
|
do_dump_model(model_plus)
|
|
|
|
model_plus = load_some_model(args.model)
|
|
|
|
params = Params.load(model_plus)
|
|
if params.n_ctx == -1:
|
|
if args.ctx is None:
|
|
raise Exception("The model doesn't have a context size, and you didn't specify one with --ctx\n"
|
|
"Please specify one with --ctx:\n"
|
|
" - LLaMA v1: --ctx 2048\n"
|
|
" - LLaMA v2: --ctx 4096\n")
|
|
params.n_ctx = args.ctx
|
|
|
|
if args.outtype:
|
|
params.ftype = {
|
|
"f32": GGMLFileType.AllF32,
|
|
"f16": GGMLFileType.MostlyF16,
|
|
}[args.outtype]
|
|
|
|
print(f"params = {params}")
|
|
|
|
vocab: Vocab
|
|
if args.vocab_only:
|
|
vocab = load_vocab(args.vocab_dir or args.model, args.vocabtype)
|
|
assert args.outfile, "need --outfile if using --vocab-only"
|
|
outfile = args.outfile
|
|
OutputFile.write_vocab_only(outfile, params, vocab)
|
|
print(f"Wrote {outfile}")
|
|
else:
|
|
if args.dump:
|
|
do_dump_model(model_plus)
|
|
return
|
|
|
|
if model_plus.vocab is not None and args.vocab_dir is None:
|
|
vocab = model_plus.vocab
|
|
else:
|
|
vocab_dir = args.vocab_dir if args.vocab_dir else model_plus.paths[0].parent
|
|
vocab = load_vocab(vocab_dir, args.vocabtype)
|
|
|
|
model = model_plus.model
|
|
model = convert_model_names(model, params)
|
|
ftype = pick_output_type(model, args.outtype)
|
|
model = convert_to_output_type(model, ftype)
|
|
outfile = args.outfile or default_outfile(model_plus.paths, ftype)
|
|
|
|
params.ftype = ftype
|
|
print(f"Writing {outfile}, format {ftype}")
|
|
|
|
OutputFile.write_all(outfile, params, model, vocab)
|
|
print(f"Wrote {outfile}")
|
|
|
|
|
|
if __name__ == '__main__':
|
|
main()
|