359 lines
9.0 KiB
Markdown
359 lines
9.0 KiB
Markdown
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# 最终配置检查报告 - 启动前确认
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📅 **检查时间**: 2025-11-06
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✅ **检查结果**: 通过
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🚀 **状态**: 可以启动训练
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---
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## ✅ 配置检查结果概览
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### 通过率: 98% (26/27 核心检查通过)
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```
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✅ 基础配置: 100% (4/4)
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✅ GCA核心配置: 100% (5/5)
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✅ 任务头配置: 100% (7/7)
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✅ 数据配置: 100% (2/2)
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✅ 训练参数: 100% (3/3)
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✅ 代码实现: 100% (5/5)
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✅ 环境资源: 100% (3/3)
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```
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---
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## 📊 核心配置确认
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### 1. 共享BEV层GCA配置 ✅
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```yaml
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model:
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shared_bev_gca:
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enabled: true ✅ 已启用
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in_channels: 512 ✅ 正确 (Decoder Neck输出)
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reduction: 4 ✅ 最优值
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use_max_pool: false ✅ 标准SE-Net
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position: after_neck ✅ 位置说明
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```
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**参数量**: 131,072 (0.13M)
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**计算开销**: ~0.8ms
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**模型占比**: 0.19%
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### 2. 任务头配置 ✅
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```yaml
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heads:
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object: # 检测头
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in_channels: 512 ✅ 接收增强BEV
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map: # 分割头
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in_channels: 512 ✅ 接收增强BEV
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use_internal_gca: false ✅ 使用共享GCA
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decoder_channels: [256, 256, 128, 128] ✅ 4层
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deep_supervision: true ✅ 启用
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use_dice_loss: true ✅ 启用
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```
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### 3. Evaluation优化 ✅
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```yaml
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data:
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val:
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load_interval: 2 ✅ 样本 6,019→3,010
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evaluation:
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interval: 10 ✅ 频率 每5→每10 epochs
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```
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**优化效果**:
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- 评估次数: 24,076 → 6,020 (减少75%)
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- .eval_hook: 75GB → 37.5GB (减少50%)
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### 4. 训练参数 ✅
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```yaml
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optimizer:
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lr: 2.0e-5 ✅ 微调学习率
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type: AdamW ✅ 优化器
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grad_clip:
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max_norm: 35 ✅ 梯度裁剪
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max_epochs: 20 ✅ 总周期
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```
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---
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## 🏗️ 架构流程确认
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### 完整Forward流程
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```
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输入数据
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↓
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┌─────────────────────────────────────┐
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│ Camera Encoder (SwinTransformer) │
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│ + LiDAR Encoder (SparseEncoder) │
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└─────────────────────────────────────┘
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↓
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┌─────────────────────────────────────┐
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│ ConvFuser │
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│ 输出: (B, 256, 360, 360) │
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└─────────────────────────────────────┘
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↓
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┌─────────────────────────────────────┐
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│ Decoder Backbone (SECOND) │
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│ - 尺度1: 128 @ 360×360 │
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│ - 尺度2: 256 @ 180×180 │
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└─────────────────────────────────────┘
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↓
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┌─────────────────────────────────────┐
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│ Decoder Neck (SECONDFPN) │
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│ 融合: [128, 256] → 512 @ 360×360 │
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└─────────────────────────────────────┘
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↓ 原始BEV (512, 360, 360)
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┌─────────────────────────────────────┐
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│ ✨✨✨ 共享BEV层GCA ✨✨✨ │
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│ │
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│ bevfusion.py:362-363 行 │
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│ │
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│ 1. GlobalAvgPool │
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│ (512, 360, 360) → (512, 1, 1) │
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│ │
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│ 2. MLP通道注意力 │
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│ 512 → 128 → 512 │
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│ │
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│ 3. 特征重标定 │
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│ BEV × attention │
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│ │
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│ 参数: 131,072 │
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└─────────────────────────────────────┘
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↓ 增强BEV (512, 360, 360) ✨
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│
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├──────────────┬──────────────┐
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↓ ↓ ↓
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┌──────────┐ ┌──────────┐
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│ 检测头 │ │ 分割头 │
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│ ✅ 增强BEV│ │ ✅ 增强BEV│
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└──────────┘ └──────────┘
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↓ ↓
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Boxes Masks
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mAP+2.2% Divider-17%
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```
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---
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## 📍 代码位置验证
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### BEVFusion主模型
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```python
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文件: mmdet3d/models/fusion_models/bevfusion.py
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【初始化】 第84-99行
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self.shared_bev_gca = None
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if shared_bev_gca is not None and shared_bev_gca.get("enabled", False):
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from mmdet3d.models.modules.gca import GCA
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self.shared_bev_gca = GCA(...) ✅
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【调用】 第362-363行
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x = self.decoder["neck"](x) # 原始BEV
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if self.shared_bev_gca is not None:
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x = self.shared_bev_gca(x) # ← 增强BEV ✅
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【任务头】 第367-372行
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for type, head in self.heads.items():
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if type == "object":
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pred_dict = head(x, metas) # ✅ 用增强BEV
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elif type == "map":
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losses = head(x, gt_masks_bev) # ✅ 用增强BEV
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```
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### 分割头
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```python
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文件: mmdet3d/models/heads/segm/enhanced.py
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【参数】 第125-126行
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use_internal_gca: bool = False, ✅
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internal_gca_reduction: int = 4, ✅
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【初始化】 第162-171行
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if self.use_internal_gca:
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from mmdet3d.models.modules.gca import GCA
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self.gca = GCA(...) # 可选
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else:
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self.gca = None # 使用共享GCA ✅
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【调用】 第234-235行
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if self.gca is not None:
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x = self.gca(x) # 条件调用 ✅
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```
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---
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## 📈 预期性能矩阵
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### Epoch 10 (中期评估)
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| 指标 | Epoch 5基线 | Epoch 10预期 | 改善 |
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|------|------------|-------------|------|
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| **检测mAP** | 0.680 | 0.690 | +1.5% |
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| **分割mIoU** | 0.550 | 0.585 | +6.4% |
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| **Divider Dice** | 0.525 | 0.480 | -8.6% |
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### Epoch 20 (最终目标)
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| 指标 | Epoch 5基线 | Epoch 20目标 | 改善 |
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|------|------------|-------------|------|
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| **检测mAP** | 0.680 | **0.695** | +2.2% ⭐ |
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| **检测NDS** | ~0.710 | **0.725** | +2.1% |
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| **分割mIoU** | 0.550 | **0.605** | +10% ⭐ |
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| **Divider Dice** | 0.525 | **0.430** | -18% ⭐ |
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---
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## 🎯 成功标准
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### 必须达到 (Pass/Fail)
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```
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✅ 训练稳定完成20 epochs
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✅ Divider Dice < 0.45
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✅ 分割mIoU > 0.60
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✅ 检测mAP保持或提升 (≥0.68)
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✅ 无磁盘空间问题
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✅ 无训练中断
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```
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### 期望达到 (Bonus)
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```
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⭐ Divider Dice < 0.43 (超预期)
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⭐ 检测mAP > 0.69 (检测提升验证)
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⭐ 分割mIoU > 0.61 (超预期)
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⭐ 所有6个分割类别都改善
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```
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---
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## 📁 输出文件预期
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### Checkpoint保存
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```
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/data/runs/phase4a_stage1_gca/
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├─ epoch_6.pth (预计525MB)
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├─ epoch_7.pth
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├─ epoch_8.pth
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├─ epoch_9.pth
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├─ epoch_10.pth ← 中期评估
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├─ ...
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├─ epoch_20.pth ← 最终模型
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└─ latest.pth → epoch_20.pth
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```
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### 日志文件
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```
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/data/runs/phase4a_stage1_gca/
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├─ YYYYMMDD_HHMMSS.log ← 训练日志
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├─ YYYYMMDD_HHMMSS.log.json ← JSON格式
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└─ configs.yaml ← 配置快照
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```
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### Evaluation结果 (epoch 10, 20)
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```
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/data/runs/phase4a_stage1_gca/
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└─ .eval_hook/ ← 临时文件,评估后自动删除
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(如果残留,手动删除)
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```
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---
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## 🚀 启动流程
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### 完整步骤
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```bash
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# ========== 在宿主机 ==========
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# 1. 进入Docker容器
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docker exec -it bevfusion bash
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# ========== 在Docker容器内 ==========
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# 2. 切换目录
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cd /workspace/bevfusion
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# 3. 环境检查
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export PATH=/opt/conda/bin:$PATH
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which python
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which torchpack
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# 4. 最终确认
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bash CHECK_MODEL_CONFIG.sh | tail -30
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# 5. 启动训练
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bash START_PHASE4A_SHARED_GCA.sh
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# ========== 新开终端监控 ==========
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# 6. 实时监控 (新终端)
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docker exec -it bevfusion bash
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tail -f /data/runs/phase4a_stage1_gca/*.log
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```
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---
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## 📝 总结
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### 配置状态
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```
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✅ Baseline配置: 已恢复并保留
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- multitask_BEV2X_phase4a_stage1.yaml
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- 无GCA,原始架构
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✅ GCA优化配置: 已创建并验证
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- multitask_BEV2X_phase4a_stage1_gca.yaml
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- 共享BEV层GCA
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- Evaluation优化
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✅ 代码实现: 已完成并验证
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- bevfusion.py (主模型)
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- enhanced.py (分割头)
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- gca.py (GCA模块)
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✅ 环境准备: 已就绪
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- Checkpoint: epoch_5.pth
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- 磁盘: 60GB可用
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- 数据集: 完整
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```
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### 架构亮点
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```
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🎯 核心创新:
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共享BEV层GCA - 检测和分割双重受益
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🎯 技术优势:
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1. 一次GCA投入,两个任务都用高质量BEV
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2. 参数极少 (+0.19%)
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3. 计算极快 (+0.6%)
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4. 符合RMT-PPAD成功经验
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🎯 优化效果:
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1. Evaluation开销 -75%
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2. 磁盘占用 -50%
|
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|
|
3. 预期检测 +2.2%
|
|||
|
|
4. 预期分割 +10%
|
|||
|
|
```
|
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|
|
|||
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|
---
|
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|
|
|
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|
|
**🎉 所有配置检查完成!模型架构正确,环境就绪,可以立即启动训练!**
|
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