File size: 5,162 Bytes
ffdd9aa | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 | #!/usr/bin/env python3
"""Build matched standard-Q, oQ, or oQe embedding checkpoints at 4/6/8 bits."""
from __future__ import annotations
import argparse
import json
import os
import shutil
import sys
from pathlib import Path
APP_RESOURCES = Path("/Applications/oMLX.app/Contents/Resources")
APP_SITE_PACKAGES = (
APP_RESOURCES
/ "Python/framework-mlx-base/lib/python3.11/site-packages"
)
for dependency_path in (APP_RESOURCES, APP_SITE_PACKAGES):
sys.path.insert(0, str(dependency_path))
from mlx_lm.convert import convert as mlx_lm_convert # noqa: E402
from omlx.oq import quantize_oq_streaming # noqa: E402
SENTENCE_TRANSFORMERS_FILES = (
".gitattributes",
"LICENSE",
"README.md",
"config_sentence_transformers.json",
"modules.json",
"1_Pooling",
)
def progress(phase: str, pct: float, detail: str = "", meta: dict | None = None) -> None:
suffix = f" — {detail}" if detail else ""
print(f"[{pct:5.1f}%] {phase}{suffix}", flush=True)
def preserve_embedding_metadata(source: Path, output: Path) -> None:
for relative_name in SENTENCE_TRANSFORMERS_FILES:
source_item = source / relative_name
output_item = output / relative_name
if source_item.is_dir():
shutil.copytree(source_item, output_item, dirs_exist_ok=True)
elif source_item.is_file():
output_item.parent.mkdir(parents=True, exist_ok=True)
shutil.copy2(source_item, output_item)
def validate_output(path: Path, mode: str, bits: int, source: Path) -> dict:
config_path = path / "config.json"
shards = sorted(path.glob("*.safetensors"))
if not config_path.is_file() or not shards:
raise RuntimeError("incomplete config or weight set")
config = json.loads(config_path.read_text())
quantization = config.get("quantization") or config.get("quantization_config")
if not quantization or quantization.get("bits") != bits:
raise RuntimeError(f"output does not declare {bits}-bit quantization")
optional_embedding_metadata = (
"modules.json",
"config_sentence_transformers.json",
"1_Pooling/config.json",
)
for required in optional_embedding_metadata:
if (source / required).is_file() and not (path / required).is_file():
raise RuntimeError(f"missing embedding metadata: {required}")
report = path / "oq_imatrix_report.json"
if mode == "oqe" and not report.is_file():
raise RuntimeError(f"oQ{bits}e output is missing its imatrix application report")
return {
"mode": mode,
"weight_files": len(shards),
"weight_bytes": sum(item.stat().st_size for item in shards),
"quantization": quantization,
"imatrix_report": report.is_file(),
}
def main() -> None:
parser = argparse.ArgumentParser()
parser.add_argument("--source", type=Path, required=True)
parser.add_argument("--output", type=Path, required=True)
parser.add_argument("--mode", choices=("q", "oq", "oqe"), required=True)
parser.add_argument("--bits", type=int, choices=(4, 6, 8), default=6)
parser.add_argument("--imatrix-cache", type=Path)
parser.add_argument("--resume-partial", action="store_true")
args = parser.parse_args()
source = args.source.resolve()
output = args.output.resolve()
partial = output.with_name(f".{output.name}.partial")
if not (source / "config.json").is_file():
raise FileNotFoundError(source / "config.json")
if output.exists():
raise FileExistsError(output)
if partial.exists() and not args.resume_partial:
raise FileExistsError(f"stale partial output: {partial}")
if args.resume_partial:
if not partial.exists():
raise FileNotFoundError(f"partial output not found: {partial}")
print(f"Resuming validation from {partial}", flush=True)
elif args.mode == "q":
mlx_lm_convert(
hf_path=str(source),
mlx_path=str(partial),
quantize=True,
q_group_size=64,
q_bits=args.bits,
q_mode="affine",
dtype="bfloat16",
)
else:
enhanced = args.mode == "oqe"
cache_path = ""
if enhanced:
if args.imatrix_cache is None:
raise ValueError(f"--imatrix-cache is required for oQ{args.bits}e")
cache_path = str(args.imatrix_cache.resolve())
quantize_oq_streaming(
str(source),
str(partial),
args.bits,
group_size=64,
progress_callback=progress,
dtype="bfloat16",
enhanced=enhanced,
imatrix_cache_path=cache_path,
imatrix_reuse_cache=True,
imatrix_strict=False,
imatrix_num_samples=128,
imatrix_seq_length=512,
)
preserve_embedding_metadata(source, partial)
result = validate_output(partial, args.mode, args.bits, source)
os.rename(partial, output)
result["output"] = str(output)
print("VALIDATED_OUTPUT=" + json.dumps(result, sort_keys=True), flush=True)
if __name__ == "__main__":
main()
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