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| #!/usr/bin/env python3 | |
| """GPTQ INT4 body quantization of a BF16 Qwen3.8-27B (qwen3_5) checkpoint with GPTQModel 7.3.2 on XPU. | |
| python quant_body.py --src /src --dst /dst --calib /calib --nsamples 512 --seqlen 2048 [--layers N] | |
| Body linears -> GPTQ INT4 sym g128, desc_act off, act_group_aware, damp 0.05 (mikeinnyc/SergiioB | |
| layout). GPTQModel's qwen3_5 definition already leaves in_proj_a/in_proj_b, the vision tower and | |
| mtp.* untouched; lm_head=False keeps the head dense BF16, so the result is the greglechin-style | |
| body that research/hybrid-bake/make_dense_from_gptq.py expects. | |
| Calibration (seed 608), disjoint from every eval set (wikitext-2 TEST, HumanEval/MBPP, etc.): | |
| 40 % C4 en validation shard 0 - concatenated 2048-token windows | |
| 40 % codeparrot-clean-valid - concatenated 2048-token windows of real source files | |
| 20 % ultrachat_200k test_sft - whole conversations through the chat template, cut at seqlen | |
| With --tools FILE (hermes-function-calling-v1 func-calling.json) the mix becomes 30 % C4, 40 % code, | |
| 10 % ultrachat, 20 % tool-call conversations (half with parallel calls) rendered through the model's | |
| own template with tools= (calib_tools.py), each cut to a window that holds its first assistant turn. | |
| Added 2026-11-02 after BFCL parallel lost 25/100 items: the first calibration set had no tool calls. | |
| The exact token ids are written to <dst>/calib-body.jsonl (+ sha256 in quant-meta.json) so the | |
| run can be reproduced bit-for-bit on the inputs side. | |
| --layers N is the smoke test: a symlinked copy of src whose config keeps only the first N decoder | |
| layers, to check loading, the XPU path and peak host RSS before the multi-hour full run. | |
| """ | |
| import argparse, ctypes, glob, gzip, hashlib, json, os, random, resource, shutil, sys, threading, time | |
| ap = argparse.ArgumentParser() | |
| ap.add_argument("--src", required=True); ap.add_argument("--dst", required=True) | |
| ap.add_argument("--calib", required=True, help="dir with c4/, codeparrot/, ultrachat/") | |
| ap.add_argument("--nsamples", type=int, default=512); ap.add_argument("--seqlen", type=int, default=2048) | |
| ap.add_argument("--layers", type=int, default=0, help="smoke test: keep only the first N decoder layers") | |
| ap.add_argument("--tools", default="", help="hermes func-calling.json: add a 20 %% tool-call slice") | |
| ap.add_argument("--damp", type=float, default=0.05) | |
| ap.add_argument("--offload", default="/dst/.offload") | |
| ap.add_argument("--sync-finalize", action="store_true", | |
| help="drain each layer's pack/offload finalizers before the next layer (bounds host RAM)") | |
| ap.add_argument("--calib-device", default="", help="keep cached calibration activations here (e.g. xpu:0) instead of host RAM") | |
| ap.add_argument("--malloc-trim", action="store_true", | |
| help="call glibc malloc_trim(0) every 20 s (run with MALLOC_ARENA_MAX=2): returns freed heap " | |
| "pages that GPTQModel's worker-thread arenas otherwise keep, which grew host RAM per layer") | |
| a = ap.parse_args() | |
| random.seed(608) | |
| os.makedirs(a.dst, exist_ok=True) | |
| T0 = time.time() | |
| def mem_logger(): | |
| while True: | |
| peak = resource.getrusage(resource.RUSAGE_SELF).ru_maxrss / 1e6 | |
| cur = next(int(l.split()[1]) for l in open("/proc/self/status") if l.startswith("VmRSS")) / 1e6 | |
| avail = next(int(l.split()[1]) for l in open("/proc/meminfo") if l.startswith("MemAvailable")) / 1e6 | |
| off = sum(os.path.getsize(os.path.join(r, f)) for r, _, fs in os.walk(a.offload) for f in fs) / 1e9 if os.path.isdir(a.offload) else 0 | |
| print(f"[mem] t={time.time()-T0:6.0f}s rss={cur:5.1f} peak={peak:5.1f} GB host_avail={avail:5.1f} GB offload_disk={off:5.1f} GB", flush=True) | |
| if a.malloc_trim: | |
| ctypes.CDLL("libc.so.6").malloc_trim(0) | |
| time.sleep(20) | |
| threading.Thread(target=mem_logger, daemon=True).start() | |
| def tensor_census(): | |
| # debug (QB_CENSUS=1): every 60 s, the largest groups of live CPU tensors by (shape, dtype) | |
| import gc, collections, torch | |
| while True: | |
| time.sleep(60) | |
| groups = collections.Counter(); seen = set() | |
| for o in gc.get_objects(): | |
| try: | |
| if torch.is_tensor(o) and o.device.type == "cpu" and o.numel() > 1_000_000: | |
| st = o.untyped_storage(); key = st.data_ptr() | |
| if key in seen: | |
| continue | |
| seen.add(key); groups[(tuple(o.shape), str(o.dtype))] += st.nbytes() | |
| except Exception: | |
| pass | |
| top = ", ".join(f"{s}{d.replace('torch.', '')}={b / 1e9:.2f}GB" for (s, d), b in groups.most_common(6)) | |
| print(f"[census] t={time.time()-T0:6.0f}s total={sum(groups.values()) / 1e9:.1f}GB {top}", flush=True) | |
| if os.environ.get("QB_CENSUS") == "1": | |
| threading.Thread(target=tensor_census, daemon=True).start() | |
| src = a.src | |
| if a.layers: | |
| src = "/tmp/smoke-src" | |
| shutil.rmtree(src, ignore_errors=True); os.makedirs(src) | |
| for fn in os.listdir(a.src): | |
| if fn != "config.json": | |
| os.symlink(os.path.join(a.src, fn), os.path.join(src, fn)) | |
| cfg = json.load(open(os.path.join(a.src, "config.json"))) | |
| tc = cfg.get("text_config", cfg) | |
| tc["num_hidden_layers"] = a.layers | |
| if "layer_types" in tc: | |
| tc["layer_types"] = tc["layer_types"][:a.layers] | |
| json.dump(cfg, open(os.path.join(src, "config.json"), "w"), indent=2) | |
| print(f"smoke test: {a.layers} layers via {src}", flush=True) | |
| from transformers import AutoTokenizer | |
| tok = AutoTokenizer.from_pretrained(src) | |
| def windows(texts, n): | |
| out, buf = [], [] | |
| for t in texts: | |
| buf += tok(t, add_special_tokens=False)["input_ids"] + [tok.eos_token_id] | |
| while len(buf) >= a.seqlen and len(out) < n: | |
| out.append(buf[:a.seqlen]); buf = buf[a.seqlen:] | |
| if len(out) >= n: | |
| break | |
| return out | |
| n_tools = int(a.nsamples * 0.2) if a.tools else 0 | |
| n_c4, n_code = int(a.nsamples * (0.3 if a.tools else 0.4)), int(a.nsamples * 0.4) | |
| n_chat = a.nsamples - n_c4 - n_code - n_tools | |
| c4 = [json.loads(l)["text"] for l in gzip.open(glob.glob(f"{a.calib}/c4/**/*.json.gz", recursive=True)[0], "rt")] | |
| random.shuffle(c4) | |
| code = [json.loads(l)["content"] for l in gzip.open(glob.glob(f"{a.calib}/codeparrot/*.json.gz")[0], "rt")] | |
| code = code[:int(len(code) * 0.9)] # last 10 % (file order) is the ppl-code / kld eval set | |
| random.shuffle(code) | |
| import pandas as pd | |
| uc = pd.read_parquet(sorted(glob.glob(f"{a.calib}/ultrachat/**/test_sft*.parquet", recursive=True))[0]) | |
| uc = uc.sample(frac=1.0, random_state=608) | |
| samples = windows(c4, n_c4) + windows(code, n_code) | |
| if a.tools: | |
| sys.path.insert(0, os.path.dirname(os.path.abspath(__file__))) | |
| import calib_tools | |
| conv = calib_tools.render(tok, a.tools) | |
| random.Random(608).shuffle(conv) | |
| par = [c for c in conv if "</tool_call>\n<tool_call>" in c][:n_tools // 2] | |
| single = [c for c in conv if "</tool_call>\n<tool_call>" not in c and "<tool_call>" in c][:n_tools - len(par)] | |
| end_tok = tok.convert_tokens_to_ids("<|im_end|>") | |
| for c in par + single: | |
| ids = tok(c, add_special_tokens=False)["input_ids"] | |
| # end of the first assistant turn that calls a tool: keep it, plus what follows, inside the window | |
| k = c.find("<tool_call>"); e = len(tok(c[:k], add_special_tokens=False)["input_ids"]) | |
| e = next((i for i in range(e, len(ids)) if ids[i] == end_tok), len(ids) - 1) + 1 | |
| lo = 0 if e + 64 <= a.seqlen else max(0, min(e + 64, len(ids)) - a.seqlen) | |
| samples.append(list(ids[lo:lo + a.seqlen])) | |
| assert len(samples) == n_c4 + n_code + n_tools, "tool slice short" | |
| for _, r in uc.iterrows(): | |
| if len(samples) >= a.nsamples: | |
| break | |
| msgs = [{"role": m["role"], "content": m["content"]} for m in r["messages"]] | |
| # render to text, then tokenize: apply_chat_template(tokenize=True) returns a BatchEncoding in transformers 5 | |
| ids = tok(tok.apply_chat_template(msgs, tokenize=False), add_special_tokens=False)["input_ids"] | |
| if len(ids) >= 256: | |
| samples.append(list(ids[:a.seqlen])) | |
| assert len(samples) == a.nsamples, f"built {len(samples)} calibration samples, wanted {a.nsamples}" | |
| with open(os.path.join(a.dst, "calib-body.jsonl"), "w") as f: | |
| for s in samples: | |
| f.write(json.dumps(s) + "\n") | |
| calib_sha = hashlib.sha256(open(os.path.join(a.dst, "calib-body.jsonl"), "rb").read()).hexdigest() | |
| print(f"calibration: {len(samples)} samples (c4 {n_c4}, code {n_code}, chat {n_chat}, tools {n_tools}), " | |
| f"{sum(map(len, samples))} tokens, sha256 {calib_sha[:16]}", flush=True) | |
| calib = [{"input_ids": s, "attention_mask": [1] * len(s)} for s in samples] | |
| from gptqmodel import GPTQModel, QuantizeConfig | |
| import gptqmodel, torch | |
| qcfg = QuantizeConfig(bits=4, group_size=128, sym=True, desc_act=False, act_group_aware=True, | |
| damp_percent=a.damp, true_sequential=True, lm_head=False, | |
| offload_to_disk=True, offload_to_disk_path=a.offload, | |
| wait_for_submodule_finalizers=a.sync_finalize, | |
| **({"calibration_data_device": a.calib_device} if a.calib_device else {})) | |
| print("QuantizeConfig:", qcfg, flush=True) | |
| model = GPTQModel.load(src, qcfg, device="xpu:0") | |
| t = time.time() | |
| model.quantize(calib, batch_size=1, tokenizer=tok) | |
| quant_s = time.time() - t | |
| model.save(a.dst) | |
| shutil.rmtree(a.offload, ignore_errors=True) | |
| meta = {"src": a.src, "layers": a.layers or "all", "nsamples": a.nsamples, "seqlen": a.seqlen, | |
| "mix": {"c4": n_c4, "code": n_code, "chat": n_chat, "tools": n_tools}, "tools_src": "NousResearch/hermes-function-calling-v1@dae3e1d func-calling.json" if a.tools else None, "seed": 608, "damp_percent": a.damp, | |
| "calib_sha256": calib_sha, "calib_device": a.calib_device or "default", "sync_finalize": a.sync_finalize, "malloc_trim": a.malloc_trim, "malloc_arena_max": os.environ.get("MALLOC_ARENA_MAX"), "gptqmodel": gptqmodel.__version__, "torch": torch.__version__, | |
| "quantize_seconds": round(quant_s), "total_seconds": round(time.time() - T0), | |
| "peak_rss_gb": round(resource.getrusage(resource.RUSAGE_SELF).ru_maxrss / 1e6, 2)} | |
| json.dump(meta, open(os.path.join(a.dst, "quant-meta.json"), "w"), indent=2) | |
| print("DONE", json.dumps(meta), flush=True) | |