h3-blackwell-runtime/tools/compare_qwen_layer_trace.py

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2026-08-13 00:05:32 +07:00
"""Replay direct Qwen against an immutable per-layer Comfy trace."""
import argparse
from pathlib import Path
import torch
from h3_blackwell_runtime.qwen3vl_text import Qwen3VL32BTextEncoder
parser = argparse.ArgumentParser()
parser.add_argument("--trace-dir", type=Path, required=True)
parser.add_argument("--checkpoint", default="/text-encoders/qwen3vl_32b_minimax_h3_nvfp4_awq.safetensors")
args = parser.parse_args()
encoder = Qwen3VL32BTextEncoder(args.checkpoint).eval()
hidden = torch.load(args.trace_dir / "qwen_input_embeds.pt", map_location="cuda", weights_only=False).to(encoder.dtype)
with torch.inference_mode():
for index, layer in enumerate(encoder.layers):
hidden = layer(hidden)
expected = torch.load(args.trace_dir / "qwen_layers" / f"{index:02d}.pt", map_location="cuda", weights_only=False)
delta = (hidden.float() - expected.float()).abs()
print(f"layer={index:02d} max_abs={delta.max().item():.6g} mean_abs={delta.mean().item():.6g}")
expected = torch.load(args.trace_dir / "qwen_layer50.pt", map_location="cuda", weights_only=False)
delta = (hidden.float() - expected.float()).abs()
print(f"layer50 max_abs={delta.max().item():.6g} mean_abs={delta.mean().item():.6g}")