diff options
Diffstat (limited to 'convert-lora-to-ggml.py')
| -rwxr-xr-x | convert-lora-to-ggml.py | 84 |
1 files changed, 44 insertions, 40 deletions
diff --git a/convert-lora-to-ggml.py b/convert-lora-to-ggml.py index a937410d..53bb8a3d 100755 --- a/convert-lora-to-ggml.py +++ b/convert-lora-to-ggml.py @@ -3,7 +3,6 @@ from __future__ import annotations import json import os -import re import struct import sys from typing import Any, BinaryIO, Sequence @@ -11,41 +10,13 @@ from typing import Any, BinaryIO, Sequence import numpy as np import torch -NUMPY_TYPE_TO_FTYPE: dict[str, int] = {"float32": 0, "float16": 1} - +from pathlib import Path +if 'NO_LOCAL_GGUF' not in os.environ: + sys.path.insert(1, str(Path(__file__).parent / 'gguf-py' / 'gguf')) +import gguf -HF_SUBLAYER_TO_GGML = { - "self_attn.q_proj": "attn_q", - "self_attn.k_proj": "attn_k", - "self_attn.v_proj": "attn_v", - "self_attn.o_proj": "attn_output", - "mlp.gate_proj": "ffn_gate", - "mlp.down_proj": "ffn_down", - "mlp.up_proj": "ffn_up", - "input_layernorm": "attn_norm", - "post_attention_layernorm": "ffn_norm", -} - - -def translate_tensor_name(t: str) -> str: - match = re.match(r".*layers\.(\d+)\.(\w+\.\w+)\.lora_(A|B)\.weight", t) - if match: - nn = match.group(1) - sub_layer = match.group(2) - lora_type = match.group(3) - - sub_layer_renamed = HF_SUBLAYER_TO_GGML.get(sub_layer) - if sub_layer_renamed is None: - print(f"Error: unrecognized sub-layer {sub_layer} in tensor {t}") - sys.exit(1) - output_string = ( - f"blk.{nn}.{HF_SUBLAYER_TO_GGML[sub_layer]}.weight.lora{lora_type}" - ) - return output_string - else: - print(f"Error: unrecognized tensor {t}") - sys.exit(1) +NUMPY_TYPE_TO_FTYPE: dict[str, int] = {"float32": 0, "float16": 1} def write_file_header(fout: BinaryIO, params: dict[str, Any]) -> None: @@ -61,9 +32,7 @@ def write_file_header(fout: BinaryIO, params: dict[str, Any]) -> None: fout.write(struct.pack("i", int(params["lora_alpha"]))) -def write_tensor_header( - self, name: str, shape: Sequence[int], data_type: np.dtype[Any] -) -> None: +def write_tensor_header(fout: BinaryIO, name: str, shape: Sequence[int], data_type: np.dtype[Any]) -> None: sname = name.encode("utf-8") fout.write( struct.pack( @@ -78,11 +47,12 @@ def write_tensor_header( fout.seek((fout.tell() + 31) & -32) -if len(sys.argv) != 2: - print(f"Usage: python {sys.argv[0]} <path>") +if len(sys.argv) < 2: + print(f"Usage: python {sys.argv[0]} <path> [arch]") print( "Path must contain HuggingFace PEFT LoRA files 'adapter_config.json' and 'adapter_model.bin'" ) + print(f"Arch must be one of {list(gguf.MODEL_ARCH_NAMES.values())} (default: llama)") sys.exit(1) input_json = os.path.join(sys.argv[1], "adapter_config.json") @@ -90,6 +60,14 @@ input_model = os.path.join(sys.argv[1], "adapter_model.bin") output_path = os.path.join(sys.argv[1], "ggml-adapter-model.bin") model = torch.load(input_model, map_location="cpu") +arch_name = sys.argv[2] if len(sys.argv) == 3 else "llama" + +if arch_name not in gguf.MODEL_ARCH_NAMES.values(): + print(f"Error: unsupported architecture {arch_name}") + sys.exit(1) + +arch = list(gguf.MODEL_ARCH_NAMES.keys())[list(gguf.MODEL_ARCH_NAMES.values()).index(arch_name)] +name_map = gguf.TensorNameMap(arch, 200) # 200 layers ought to be enough for anyone with open(input_json, "r") as f: params = json.load(f) @@ -117,6 +95,7 @@ with open(output_path, "wb") as fout: write_file_header(fout, params) for k, v in model.items(): + orig_k = k if k.endswith(".default.weight"): k = k.replace(".default.weight", ".weight") if k in ["llama_proj.weight", "llama_proj.bias"]: @@ -129,7 +108,32 @@ with open(output_path, "wb") as fout: v = v.float() t = v.detach().numpy() - tname = translate_tensor_name(k) + + prefix = "base_model.model." + if k.startswith(prefix): + k = k[len(prefix) :] + + lora_suffixes = (".lora_A.weight", ".lora_B.weight") + if k.endswith(lora_suffixes): + suffix = k[-len(lora_suffixes[0]):] + k = k[: -len(lora_suffixes[0])] + else: + print(f"Error: unrecognized tensor name {orig_k}") + sys.exit(1) + + tname = name_map.get_name(k) + if tname is None: + print(f"Error: could not map tensor name {orig_k}") + print(" Note: the arch parameter must be specified if the model is not llama") + sys.exit(1) + + if suffix == ".lora_A.weight": + tname += ".weight.loraA" + elif suffix == ".lora_B.weight": + tname += ".weight.loraB" + else: + assert False + print(f"{k} => {tname} {t.shape} {t.dtype} {t.nbytes/1024/1024:.2f}MB") write_tensor_header(fout, tname, t.shape, t.dtype) t.tofile(fout) |