# Progress Log: Multi-Model Support

## Session: 2026-01-10

### Initial Analysis Complete

**Time**: Session start

**Actions:**
1. Read `nanovllm/engine/model_runner.py` - 确认硬编码位置 (line 35)
2. Read `nanovllm/models/qwen3.py` - 理解 Qwen3 模型结构
3. Read `nanovllm/utils/loader.py` - 理解权重加载机制
4. Read `nanovllm/layers/rotary_embedding.py` - 发现 RoPE scaling 限制
5. Read `/home/zijie/models/Llama-3.1-8B-Instruct/config.json` - 理解 Llama 配置

**Key Findings:**
- 模型加载在 `model_runner.py:35` 硬编码为 Qwen3
- RoPE 目前不支持 scaling (`assert rope_scaling is None`)
- Llama 3.1 需要 "llama3" 类型的 RoPE scaling
- Llama 无 q_norm/k_norm，无 attention bias

**Created:**
- `task_plan.md` - 6 阶段实施计划
- `findings.md` - 技术分析和发现

---

### Phase Status

| Phase | Status | Notes |
|-------|--------|-------|
| 1. Model Registry | **COMPLETED** | `registry.py`, `__init__.py` |
| 2. Llama3 RoPE | **COMPLETED** | `rotary_embedding.py` |
| 3. Llama Model | **COMPLETED** | `llama.py` |
| 4. ModelRunner | **COMPLETED** | Dynamic loading |
| 5. Qwen3 Register | **COMPLETED** | `@register_model` decorator |
| 6. Testing | **COMPLETED** | Both Llama & Qwen3 pass |

---

## Test Results

### Llama 3.1-8B-Instruct (32K needle, GPU 0, offload)
```
Input: 32768 tokens
Expected: 7492
Output: 7492
Status: PASSED
Prefill: 1644 tok/s
```

### Qwen3-4B (8K needle, GPU 1, offload) - Regression Test
```
Input: 8192 tokens
Expected: 7492
Output: 7492
Status: PASSED
Prefill: 3295 tok/s
```

---

## Files Modified This Session

| File | Action | Description |
|------|--------|-------------|
| `nanovllm/models/registry.py` | created | Model registry with `@register_model` decorator |
| `nanovllm/models/__init__.py` | created | Export registry functions, import models |
| `nanovllm/models/llama.py` | created | Llama model implementation |
| `nanovllm/models/qwen3.py` | modified | Added `@register_model` decorator |
| `nanovllm/layers/rotary_embedding.py` | modified | Added Llama3 RoPE scaling |
| `nanovllm/engine/model_runner.py` | modified | Dynamic model loading via registry |
| `.claude/rules/gpu-testing.md` | created | GPU testing rules |
| `task_plan.md` | created | Implementation plan |
| `findings.md` | created | Technical findings |
| `progress.md` | created | Progress tracking |