circuitqa / code /circuitqa_infer.py
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#!/usr/bin/env python3
"""CircuitQA inference: base Qwen + LoRA adapter, fp/bf16, no quantization.
Three conditions:
A question + Verilog (identical to the baselines)
B + the record's own tool_result (identical to the baselines)
C-oracle gold category and gold tool name in the system prompt, plus the
tool output (oracle routing; the router is not used)
"""
import argparse, json, os, time, torch
from transformers import AutoModelForCausalLM, AutoTokenizer
from peft import PeftModel
BASE = "Qwen/Qwen2.5-Coder-7B-Instruct"
TOOL_CAP = 8000 # chars; structural_analysis JSON reaches 52k otherwise
SYS_A = "You are an expert Verilog design analyzer."
SYS_B = ("You are an expert Verilog design analyzer. Use the provided tool analysis "
"results to answer accurately. Always use the EXACT values from the tool "
"output - do not estimate or approximate.")
def design_source(rec):
"""Released records reference the design (`source`) instead of carrying it: read the file
fetched by scripts/fetch_sources.py from $CIRCUITQA_SOURCES (default ./sources)."""
if rec.get("verilog_code"):
return rec["verilog_code"]
path = os.path.join(os.environ.get("CIRCUITQA_SOURCES", "sources"), rec["source"]["sha256"] + ".v")
if not os.path.exists(path):
raise SystemExit(f"design source {path} not found: run scripts/fetch_sources.py first")
return open(path, encoding="utf-8").read()[:rec.get("prompt_code_chars", 3000)]
def build(rec, cond, vcap):
v = design_source(rec)[:vcap]
q = rec.get("question", "")
tr = rec.get("tool_result", "")
if not isinstance(tr, str):
tr = json.dumps(tr, indent=2)
if len(tr) > TOOL_CAP:
# The summary block (node_count, edge_count, avg_degree, gate counts)
# is emitted at the END of the tool JSON -- for graph_extractor it sits
# past char 62000 of 62800. A head-only cap removes exactly the fields
# the gold answers quote, so keep both ends.
head = TOOL_CAP // 3
tail = TOOL_CAP - head
tr = (tr[:head] + "\n...[" + str(len(tr) - TOOL_CAP) +
" chars elided]...\n" + tr[-tail:])
if cond == "A":
return SYS_A, f"Verilog Code:\n```verilog\n{v}\n```\n\nQuestion: {q}"
if cond == "B":
return SYS_B, (f"Verilog Code:\n```verilog\n{v}\n```\n\n"
f"Tool Analysis:\n{tr}\n\nQuestion: {q}")
# C-oracle: reproduces training/comprehensive_inference_test.py verbatim
cat = (rec.get("category") or "").replace("_", " ")
tool = rec.get("tool_name", "")
sys_p = (f"You are an expert Verilog design analyzer specializing in {cat}. "
f"Use the provided tool analysis results to answer accurately. "
f"Always use the EXACT values from the tool output - do not estimate "
f"or approximate.")
return sys_p, (f"Verilog Code:\n```verilog\n{v}\n```\n\n"
f"Tool Analysis ({tool}):\n{tr}\n\nQuestion: {q}")
def main():
ap = argparse.ArgumentParser()
ap.add_argument("--ref", required=True)
ap.add_argument("--adapter", default="adapter")
ap.add_argument("--condition", required=True, choices=["A", "B", "C-oracle"])
ap.add_argument("--out", required=True)
ap.add_argument("--limit", type=int)
ap.add_argument("--batch", type=int, default=8)
ap.add_argument("--threads", type=int, default=48)
ap.add_argument("--max-new", type=int, default=256)
ap.add_argument("--verilog-cap", type=int, default=2000)
ap.add_argument("--max-len", type=int, default=6144,
help="prompt window; structural_analysis tool_result alone "
"reaches ~15k tokens")
ap.add_argument("--gpu-gib", type=float, default=0,
help="cap GPU use at N GiB and offload the rest to CPU; "
"0 = pure CPU. A hard cap means THIS process OOMs "
"before it can starve anything else on the card.")
ap.add_argument("--base-only", action="store_true",
help="skip the LoRA adapter: the untuned base-model row")
a = ap.parse_args()
torch.set_num_threads(a.threads)
recs = [json.loads(l) for l in open(a.ref) if l.strip()]
if a.limit: recs = recs[:a.limit]
done = set()
if os.path.exists(a.out):
for l in open(a.out):
try:
r = json.loads(l)
if (r.get("prediction") or "").strip(): done.add(r["question_hash"])
except Exception: pass
recs = [r for r in recs if r["question_hash"] not in done]
print(f"{len(done)} already done, {len(recs)} to run", flush=True)
if not recs: return
dtype = torch.bfloat16 # training dtype; not quantization
print(f"loading {BASE} dtype={dtype} threads={a.threads}", flush=True)
tok = AutoTokenizer.from_pretrained(a.adapter if not a.base_only else BASE)
if tok.pad_token is None: tok.pad_token = tok.eos_token
tok.padding_side = "left"
tok.truncation_side = "left" # keep the question, drop the oldest context
if a.gpu_gib > 0 and torch.cuda.is_available():
total = torch.cuda.get_device_properties(0).total_memory / (1024**3)
frac = min(0.95, a.gpu_gib / total)
torch.cuda.set_per_process_memory_fraction(frac, 0)
print(f"GPU cap {a.gpu_gib:.1f} GiB of {total:.1f} GiB "
f"(fraction {frac:.3f}); surplus layers go to CPU", flush=True)
# Weights must leave room for activations and the KV cache inside the
# same cap, or the first forward pass OOMs against our own limit.
wbudget = max(2.0, a.gpu_gib - 6.0)
print(f" weights<={wbudget:.0f}GiB on GPU, rest on CPU, "
f"{a.gpu_gib-wbudget:.0f}GiB reserved for activations", flush=True)
model = AutoModelForCausalLM.from_pretrained(
BASE, dtype=dtype, device_map="auto",
max_memory={0: f"{wbudget:.0f}GiB", "cpu": "80GiB"})
else:
model = AutoModelForCausalLM.from_pretrained(BASE, dtype=dtype, device_map="cpu")
if not a.base_only:
model = PeftModel.from_pretrained(model, a.adapter)
print("LoRA adapter attached", flush=True)
model.eval()
fh = open(a.out, "a")
t0 = time.time()
for i in range(0, len(recs), a.batch):
chunk = recs[i:i + a.batch]
prompts = []
for r in chunk:
s, u = build(r, a.condition, a.verilog_cap)
prompts.append(tok.apply_chat_template(
[{"role": "system", "content": s}, {"role": "user", "content": u}],
tokenize=False, add_generation_prompt=True))
enc = tok(prompts, return_tensors="pt", padding=True,
truncation=True, max_length=a.max_len)
enc = {k: v.to(model.device) for k, v in enc.items()}
with torch.no_grad():
out = model.generate(**enc, max_new_tokens=a.max_new,
do_sample=False, temperature=None, top_p=None,
pad_token_id=tok.pad_token_id)
for r, o, n in zip(chunk, out.cpu(), enc["input_ids"].cpu()):
txt = tok.decode(o[len(n):], skip_special_tokens=True).strip()
fh.write(json.dumps({"question_hash": r["question_hash"],
"prediction": txt,
"category": r.get("category")}) + "\n")
fh.flush()
d = i + len(chunk)
el = time.time() - t0
print(f" {d}/{len(recs)} {el:.0f}s {el/max(1,d):.1f}s/sample "
f"eta {(len(recs)-d)*el/max(1,d)/60:.0f}min", flush=True)
fh.close()
if __name__ == "__main__":
main()