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colibri/c/tools/make_glm_oracle.py
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woolcoxm 69f65d5173 Windows-dev: grouped quantization + mixed precision + expert budget + download tool
Consolidates all experiment branches into one Windows-dev branch:

1. Group-scaled int4 (fmt=4, gs=128) — glm.c
   - QT struct: added gs field
   - matmul_i4_grouped: AVX2 kernel, verified to 3e-08 vs f32
   - Format detection: auto-detects from .qs scale array size
   - expert_load: both mmap and slab+pread paths handle fmt=4
   - qt_bytes: fmt=4 case added

2. Per-tensor-type mixed precision — convert_fp8_to_int4.py
   - Split classify() into sh/o/kvb/attn/dmlp sub-types
   - New args: --shared-bits, --o-bits, --kvb-bits, --attn-bits, --dmlp-bits
   - Plan: shared expert + o_proj + kv_b_proj at int8, rest grouped int4
   - Only +5.3 GB RAM vs +0 for pure int4

3. EXPERT_BUDGET (miss-aware) — glm.c
   - Caps distinct experts per layer across batch-union
   - Always keeps cache hits, only drops misses
   - Up to 1.8x faster decode on low-RAM hosts

4. Two-step shared-expert prediction (PILOT_TWO) — glm.c
   - la_predict kind==2 + pilot_prefetch integration
   - +3.1% recall over baseline PILOT

5. FP8 download tool — download_fp8.py
   - ModelScope + HuggingFace dual-source
   - Parallel shard download with stall recovery

6. Tiny model generation — make_glm_oracle.py
   - Generated and tested locally for pipeline validation
2026-07-15 02:32:12 -04:00

122 lines
5.4 KiB
Python

"""Costruisce un GLM-5.2 (glm_moe_dsa) MINUSCOLO a pesi random come ORACOLO.
Architettura vera (MLA + DSA indexer + router sigmoid/noaux_tc + shared expert),
dimensioni minuscole. Salva pesi+config in c/glm_tiny/ e un riferimento greedy in
c/ref_glm.json. seq corta (<= index_topk) cosi' il DSA seleziona tutte le key e
l'attenzione coincide con la MLA densa: il motore C puo' validare senza implementare
l'indexer sparso.
--fp8: salva i pesi come FP8 e4m3 + scale a blocchi 128x128 (layout del checkpoint reale
GLM-5.2-FP8) invece di bf16, cosi' convert_fp8_to_int4.py puo' esercitare il path FP8->int4
su un modello minuscolo. PRIMA di calcolare ref_glm.json fa il round-trip dei pesi per FP8
(quant->dequant, copy_ nel modello): cosi' il riferimento riflette ESATTAMENTE il modello
FP8 che il converter legge, non il modello bf16 a precisione piena. Default: bf16 (oracolo
originale invariato).
EN: --fp8 writes FP8 e4m3 + 128x128 block scale_inv (real GLM-5.2-FP8 layout) instead of bf16,
EN: so convert_fp8_to_int4.py can run its FP8->int4 path on a tiny model. ref_glm.json is
EN: computed AFTER the FP8 round-trip, so the reference matches exactly what the converter
EN: ingests. Default: bf16 (original oracle unchanged)."""
import json, sys, argparse
from pathlib import Path
import torch
from transformers import GlmMoeDsaConfig, GlmMoeDsaForCausalLM
sys.path.insert(0, str(Path(__file__).resolve().parent)) # importa glm_fp8_emit se lanciato da c/
from glm_fp8_emit import (fp8_block_quantize, fp8_block_dequantize, keep_f32,
save_fp8_safetensors)
ap = argparse.ArgumentParser()
ap.add_argument("--fp8", action="store_true",
help="salva in FP8 e4m3 + 128x128 block scale_inv (layout GLM-5.2-FP8) e "
"calcola ref_glm.json sul modello dopo il round-trip FP8. "
"EN: write FP8 e4m3 + block scale_inv, ref computed on FP8-rounded model")
args = ap.parse_args()
torch.manual_seed(1234)
cfg = GlmMoeDsaConfig(
vocab_size=256,
hidden_size=128,
intermediate_size=64, # MLP densa (primi 3 layer)
moe_intermediate_size=32, # expert
num_hidden_layers=5, # 3 densi + 2 sparse
first_k_dense_replace=3,
num_attention_heads=4,
num_key_value_heads=4,
n_routed_experts=8,
num_experts_per_tok=2,
n_shared_experts=1,
q_lora_rank=64,
kv_lora_rank=32,
qk_nope_head_dim=24,
qk_rope_head_dim=8, # pari -> interleave ok; head_dim diventa 8
v_head_dim=32,
index_topk=4096, # >> seq_len -> DSA seleziona tutto (no-op)
index_head_dim=16,
index_n_heads=2,
n_group=1,
topk_group=1,
norm_topk_prob=True,
routed_scaling_factor=2.5,
rope_parameters={"rope_type": "default", "rope_theta": 10000.0},
tie_word_embeddings=False,
rms_norm_eps=1e-5,
attention_bias=False,
max_position_embeddings=4096,
)
cfg._attn_implementation = "eager"
model = GlmMoeDsaForCausalLM(cfg).eval()
# rende i pesi non banali (default init e' molto piccolo): scala router/bias per topk vario
with torch.no_grad():
for n, p in model.named_parameters():
if p.dim() >= 2:
p.normal_(0, 0.05)
# bias di correzione del router: valori distinti cosi' la selezione e' sensata
for i, layer in enumerate(model.model.layers):
if hasattr(layer.mlp, "gate"):
layer.mlp.gate.e_score_correction_bias.copy_(
torch.linspace(-0.1, 0.1, cfg.n_routed_experts))
# --fp8: round-trip dei pesi quantizzabili per FP8 PRIMA di calcolare il riferimento,
# cosi' ref_glm.json riflette esattamente il modello FP8 che il converter leggera'.
# Norme/router/bias (keep_f32) restano a precisione piena. EN: --fp8: round-trip quantizable
# weights through FP8 before computing the reference, so ref_glm.json matches the FP8 model.
if args.fp8:
with torch.no_grad():
for n, p in model.named_parameters():
if keep_f32(n, p) or p.dim() < 2:
continue
q, s = fp8_block_quantize(p)
p.copy_(fp8_block_dequantize(q, s))
print("=== state_dict tensors (names used by the C loader) ===")
for n, p in model.state_dict().items():
print(f" {n:60s} {tuple(p.shape)}")
prompt = [3, 14, 159, 26, 53, 58, 200, 11, 77, 240, 5, 99] # token id arbitrari, seq corta
ids = torch.tensor([prompt])
with torch.no_grad():
out = model.generate(ids, max_new_tokens=20, do_sample=False, use_cache=True)
full = out[0].tolist()
print("\nprompt:", prompt)
print("full :", full)
# teacher-forcing: un singolo forward su tutta la sequenza -> argmax per posizione.
# Per il greedy vale tf_pred[i] == full[i+1] per i >= len(prompt)-1; serve a validare
# il PREFILL del motore C separandolo dal decode.
with torch.no_grad():
lg = model(torch.tensor([full]), use_cache=False).logits[0] # [seq, vocab]
tf_pred = lg.argmax(-1).tolist()
print("tf_pred:", tf_pred)
if args.fp8:
n_fp8, n_tot = save_fp8_safetensors(model.state_dict(), "glm_tiny/model.safetensors")
print(f"\nsaved FP8: {n_fp8} e4m3 tensors (+{n_tot - n_fp8} scale_inv sidecars / f32) "
f"-> glm_tiny/model.safetensors")
else:
model.save_pretrained("glm_tiny", safe_serialization=True)
json.dump(cfg.to_dict(), open("glm_tiny/config.json", "w"))
json.dump({"prompt_ids": prompt, "full_ids": full, "tf_pred": tf_pred}, open("ref_glm.json", "w"))
print("saved: glm_tiny/ (weights + config) and ref_glm.json"
+ (" [fp8]" if args.fp8 else ""))