Delete dump_tensor.py
Browse files- dump_tensor.py +0 -97
dump_tensor.py
DELETED
|
@@ -1,97 +0,0 @@
|
|
| 1 |
-
#!/usr/bin/env python3
|
| 2 |
-
"""Dump one tensor from a source GGUF (F16/BF16/F32) as raw little-endian
|
| 3 |
-
float32, for feeding to ./bound.
|
| 4 |
-
|
| 5 |
-
Usage:
|
| 6 |
-
python3 dump_tensor.py model-f16.gguf blk.2.attn_output.weight out.f32
|
| 7 |
-
python3 dump_tensor.py model-f16.gguf --list
|
| 8 |
-
"""
|
| 9 |
-
import struct, sys, os
|
| 10 |
-
import numpy as np
|
| 11 |
-
|
| 12 |
-
# Reuse the parsing helpers from the requantizer so the layout stays in sync.
|
| 13 |
-
sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
|
| 14 |
-
from hexstate_requantize import (
|
| 15 |
-
GGUF_MAGIC, GGML_TYPE_F32, GGML_TYPE_F16, GGML_TYPE_BF16,
|
| 16 |
-
TYPE_BLOCK_SIZE, TYPE_BLOCK_BYTES,
|
| 17 |
-
read_string, read_kv_value, align_offset, bf16_to_f32, f16_to_f32,
|
| 18 |
-
)
|
| 19 |
-
|
| 20 |
-
|
| 21 |
-
def load(path):
|
| 22 |
-
with open(path, 'rb') as f:
|
| 23 |
-
assert struct.unpack('<I', f.read(4))[0] == GGUF_MAGIC, "bad GGUF magic"
|
| 24 |
-
struct.unpack('<I', f.read(4))[0] # version
|
| 25 |
-
n_tensors = struct.unpack('<Q', f.read(8))[0]
|
| 26 |
-
n_kv = struct.unpack('<Q', f.read(8))[0]
|
| 27 |
-
for _ in range(n_kv):
|
| 28 |
-
read_string(f)
|
| 29 |
-
read_kv_value(f, struct.unpack('<I', f.read(4))[0])
|
| 30 |
-
|
| 31 |
-
infos = []
|
| 32 |
-
for _ in range(n_tensors):
|
| 33 |
-
name = read_string(f)
|
| 34 |
-
n_dims = struct.unpack('<I', f.read(4))[0]
|
| 35 |
-
dims = [struct.unpack('<Q', f.read(8))[0] for _ in range(n_dims)]
|
| 36 |
-
ttype = struct.unpack('<I', f.read(4))[0]
|
| 37 |
-
offset = struct.unpack('<Q', f.read(8))[0]
|
| 38 |
-
n_el = 1
|
| 39 |
-
for d in dims:
|
| 40 |
-
n_el *= d
|
| 41 |
-
bs = TYPE_BLOCK_SIZE.get(ttype, 1)
|
| 42 |
-
bb = TYPE_BLOCK_BYTES.get(ttype, 4)
|
| 43 |
-
infos.append({'name': name, 'dims': dims, 'type': ttype,
|
| 44 |
-
'offset': offset, 'n_elements': n_el,
|
| 45 |
-
'data_size': ((n_el + bs - 1) // bs) * bb})
|
| 46 |
-
return infos, align_offset(f.tell())
|
| 47 |
-
|
| 48 |
-
|
| 49 |
-
def main():
|
| 50 |
-
if len(sys.argv) < 3:
|
| 51 |
-
print(__doc__)
|
| 52 |
-
sys.exit(1)
|
| 53 |
-
gguf = sys.argv[1]
|
| 54 |
-
infos, data_start = load(gguf)
|
| 55 |
-
|
| 56 |
-
if sys.argv[2] == '--list':
|
| 57 |
-
for ti in infos:
|
| 58 |
-
print(f" {ti['name']:<50s} type={ti['type']:<3d} "
|
| 59 |
-
f"dims={ti['dims']} n={ti['n_elements']:,}")
|
| 60 |
-
return
|
| 61 |
-
|
| 62 |
-
want = sys.argv[2]
|
| 63 |
-
out = sys.argv[3] if len(sys.argv) > 3 else 'tensor.f32'
|
| 64 |
-
ti = next((t for t in infos if t['name'] == want), None)
|
| 65 |
-
if ti is None:
|
| 66 |
-
print(f"no tensor named {want!r}; run with --list")
|
| 67 |
-
sys.exit(1)
|
| 68 |
-
|
| 69 |
-
with open(gguf, 'rb') as f:
|
| 70 |
-
f.seek(data_start + ti['offset'])
|
| 71 |
-
raw = f.read(ti['data_size'])
|
| 72 |
-
|
| 73 |
-
if ti['type'] == GGML_TYPE_F32:
|
| 74 |
-
a = np.frombuffer(raw, dtype=np.float32).copy()
|
| 75 |
-
elif ti['type'] == GGML_TYPE_F16:
|
| 76 |
-
a = f16_to_f32(raw, ti['n_elements'])
|
| 77 |
-
elif ti['type'] == GGML_TYPE_BF16:
|
| 78 |
-
a = bf16_to_f32(raw, ti['n_elements'])
|
| 79 |
-
else:
|
| 80 |
-
print(f"tensor is type {ti['type']} (already quantized) — "
|
| 81 |
-
f"dump from the F16/BF16 source GGUF instead")
|
| 82 |
-
sys.exit(1)
|
| 83 |
-
|
| 84 |
-
a = np.ascontiguousarray(a[:ti['n_elements']], dtype=np.float32)
|
| 85 |
-
a.tofile(out)
|
| 86 |
-
sigma = float(np.sqrt(np.mean(a.astype(np.float64) ** 2)))
|
| 87 |
-
v = a.astype(np.float64) ** 2
|
| 88 |
-
kurt = float(np.mean(v * v) / (np.mean(v) ** 2)) if np.mean(v) > 0 else 3.0
|
| 89 |
-
print(f" wrote {out}: {a.size:,} elements, dims={ti['dims']}")
|
| 90 |
-
print(f" sigma = {sigma:.6e}")
|
| 91 |
-
print(f" kurtosis = {kurt:.2f} (gaussian = 3)")
|
| 92 |
-
print()
|
| 93 |
-
print(f" next: ./bound --file {out}")
|
| 94 |
-
|
| 95 |
-
|
| 96 |
-
if __name__ == '__main__':
|
| 97 |
-
main()
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|