# Progress Log: nanovllm State Leakage Debug

## Session: 2026-01-20

### Entry 1: Initial Analysis Complete
**Time**: 开始

**Completed**:
- [x] 读取 `docs/ruler_32k_chunked_offload_issue.md` 理解问题描述
- [x] 读取 `nanovllm/kvcache/offload_engine.py` 分析 reset() 实现
- [x] 读取 `nanovllm/kvcache/hybrid_manager.py` 分析 deallocate() 实现
- [x] 读取 `nanovllm/engine/llm_engine.py` 分析请求处理流程
- [x] 创建 planning files (task_plan.md, findings.md, progress.md)

**Key Finding**:
`OffloadEngine.reset()` 清除了 GPU buffers 但**没有清除 CPU cache**。这是最可能的状态泄漏源头。

**Next Steps**:
1. 验证 CPU cache 假设 - 添加 CPU cache 清零到 reset()
2. 运行对比测试确认修复效果
3. 检查其他可能的状态泄漏点

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### Entry 2: (待填写)
**Time**:

**Completed**:

**Issues**:

**Next Steps**:

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## Test Results Summary
| Test | Before Fix | After Fix | Notes |
|------|------------|-----------|-------|
| niah_single_1 (fresh-llm) | 100% | - | Baseline |
| niah_single_1 (batch) | ~80% | - | State leakage |
| multikey_1 | ~94% | - | |
| multikey_2 | ~94% | - | |
| multikey_3 | ~56% | - | |

## Files Modified
| File | Change | Status |
|------|--------|--------|
| (待记录) | | |