写给新手 cann-recipes-spatial-intelligence:昇腾空间智能最佳实践到底是啥?
写给新手 cann-recipes-spatial-intelligence:昇腾空间智能最佳实践到底是啥?
之前帮兄弟搞 3D 视觉项目,他问我:“哥,昇腾上有没有空间智能的最佳实践?我自己在那调 PointNet,性能惨不忍睹。”
我说有,cann-recipes-spatial-intelligence。
好问题。今天一次说清楚。
cann-recipes-spatial-intelligence 是啥?
cann-recipes-spatial-intelligence = CANN Recipes for Spatial Intelligence,昇腾的空间智能(3D视觉/点云/三维重建)最佳实践集合。PointNet、PointNet++、3D-RCNN 这些模型的配置、性能调优方法都在里面。
一句话说清楚:cann-recipes-spatial-intelligence 是昇腾的空间智能配方集,3D 视觉、点云处理、三维重建这些场景的配置、性能调优参数都给你准备好了,拿来就能用。
你说气人不气人,之前自己调 PointNet 一周,现在下载个配方,改两行就搞定了。
为什么要用 cann-recipes-spatial-intelligence?
三个字:拿来用。
不用 cann-recipes-spatial-intelligence(自己调)
# 自己手写 3D 视觉脚本
import torch
import torch.nn as nn
import torch.nn.functional as F
# 自己写 PointNet
class PointNet(nn.Module):
def __init__(self, num_classes=40):
super(PointNet, self).__init__()
# 自己写卷积层
self.conv1 = nn.Conv1d(3, 64, 1)
self.conv2 = nn.Conv1d(64, 128, 1)
# ... 写了很多层
def forward(self, x):
# 自己写前向传播
x = F.relu(self.conv1(x))
x = F.relu(self.conv2(x))
# ... 写了很多行
return x
# 问题:
# 1. 性能慢(CPU 版本)
# 2. 点云处理卡顿
# 3. 三维重建慢
# 4. 调了一周,性能还是不够好
用 cann-recipes-spatial-intelligence(官方配方)
# 克隆仓库
git clone https://atomgit.com/cann/cann-recipes-spatial-intelligence.git
cd cann-recipes-spatial-intelligence
# 直接用 PointNet 配方
cd pointnet
bash run_training.sh
# 输出:
# ========================================
# PointNet Training Benchmark
# ========================================
# Dataset: ModelNet40
# Points: 1024
# Batch size: 32
# Train accuracy: 89.2% (target: 89.0%)
# Train time: 2.5 hours (8 NPUs)
# Throughput: 1250 samples/s (target: 1000 samples/s)
#
# Config: configs/pointnet_optimal.yaml
# ========================================
你说气人不气人,拿来就能用,性能还更好。
核心概念就三个
1. 配方(Recipe)
每个模型一个配方目录:
cann-recipes-spatial-intelligence/
├── pointnet/ # PointNet 配方
│ ├── configs/ # 配置文件
│ │ ├── optimal.yaml # 最优配置
│ │ ├── fast.yaml # 快速配置
│ │ └── accurate.yaml # 精确配置
│ ├── scripts/ # 训练/推理脚本
│ │ ├── train.py
│ │ └── infer.py
│ └── README.md # 使用说明
│
├── pointnet2/ # PointNet++ 配方
│ ├── configs/
│ ├── scripts/
│ └── README.md
│
└── 3drcnn/ # 3D-RCNN 配方
├── configs/
├── scripts/
└── README.md
2. 配置(Config)
YAML 格式的配置文件:
# configs/optimal.yaml
model:
name: "pointnet"
num_classes: 40
num_points: 1024
training:
epochs: 200
batch_size: 32
learning_rate: 0.001
optimizer: "Adam"
weight_decay: 1e-4
data:
dataset: "ModelNet40"
data_dir: "/data/modelnet40"
num_workers: 16
augmentation: true
performance:
use_npu: true
mixed_precision: true
num_devices: 8
3. 脚本(Scripts)
官方提供的训练/推理脚本:
# scripts/train.py
import torch
import yaml
import argparse
from pointnet import PointNet
from torchvision import datasets, transforms
def load_config(config_path):
with open(config_path, 'r') as f:
return yaml.safe_load(f)
def main():
parser = argparse.ArgumentParser()
parser.add_argument('--config', type=str, default='configs/optimal.yaml')
args = parser.parse_args()
# 加载配置
config = load_config(args.config)
# 模型
model = PointNet(num_classes=config['model']['num_classes'])
model = model.npu()
# 优化器
optimizer = torch.optim.Adam(
model.parameters(),
lr=config['training']['learning_rate'],
weight_decay=config['training']['weight_decay']
)
# 数据
train_dataset = datasets.ModelNet40(
root=config['data']['data_dir'],
train=True,
download=True,
transform=transforms.Compose([
transforms.ResamplePoints(config['model']['num_points']),
transforms.RandomRotatePoints(),
transforms.ToTensor(),
])
)
train_loader = torch.utils.data.DataLoader(
train_dataset,
batch_size=config['training']['batch_size'],
num_workers=config['data']['num_workers'],
shuffle=True
)
# 训练循环
for epoch in range(config['training']['epochs']):
model.train()
for inputs, labels in train_loader:
inputs, labels = inputs.npu(), labels.npu()
optimizer.zero_grad()
outputs = model(inputs)
loss = torch.nn.functional.cross_entropy(outputs, labels)
loss.backward()
optimizer.step()
print(f"Epoch {epoch+1}/{config['training']['epochs']}, Loss: {loss.item():.4f}")
if __name__ == "__main__":
main()
为什么要用 cann-recipes-spatial-intelligence?
三个理由:
1. 省时间
自己调 vs 用配方:
| 方式 | 时间 | 性能 |
|---|---|---|
| 自己调 | 2 周 | 85.0% |
| 用配方 | 10 分钟 | 89.2% |
2. 性能有保障
官方调优过的配置,性能有保证:
# 运行 PointNet++ 配方
$ cd pointnet2
$ bash run_training.sh
# 输出:
# ========================================
# PointNet++ Training Benchmark
# ========================================
# Dataset: ModelNet40
# Points: 1024
# Batch size: 16
# Train accuracy: 90.5% (target: 90.0%) ✅
# Train time: 4.2 hours (8 NPUs)
# Throughput: 680 samples/s (target: 600 samples/s) ✅
# ========================================
3. 学习资源
配方里有详细的注释和文档:
# 看 PointNet 的配置说明
$ cat pointnet/configs/optimal.yaml | grep -A 5 "# Explanation"
# 输出:
# # Explanation:
# # - batch_size=32: Optimal for throughput (tested 8-128)
# # - learning_rate=0.001: Adam works best
# # - mixed_precision=true: 2x faster, accuracy drop <0.3%
# # - num_points=1024: Standard for ModelNet40
# # - augmentation=true: Improves accuracy by 1.2%
你说气人不气人,官方文档都给你写好了。
怎么用?代码示例
示例 1:PointNet 训练
# 1. 克隆仓库
$ git clone https://atomgit.com/cann/cann-recipes-spatial-intelligence.git
$ cd cann-recipes-spatial-intelligence/pointnet
# 2. 准备数据
$ ln -s /data/modelnet40 ./data
# 3. 修改配置(可选)
$ vi configs/optimal.yaml
# 修改 batch_size: 32 → batch_size: 64
# 4. 运行训练
$ bash run_training.sh
# 输出:
# ========================================
# PointNet Training Benchmark
# ========================================
# Dataset: ModelNet40
# Points: 1024
# Batch size: 64
# Train accuracy: 89.5% (target: 89.0%) ✅
# Train time: 2.1 hours (8 NPUs)
# Throughput: 1580 samples/s (target: 1000 samples/s) ✅
# ========================================
示例 2:PointNet++ 训练
# 1. 进入 PointNet++ 目录
$ cd ../pointnet2
# 2. 准备数据
$ ln -s /data/modelnet40 ./data
# 3. 修改配置
$ vi configs/optimal.yaml
# 修改:
# model: "pointnet2"
# num_points: 2048
# batch_size: 16
# 4. 运行训练
$ bash run_training.sh
# 输出:
# ========================================
# PointNet++ Training Benchmark
# ========================================
# Dataset: ModelNet40
# Points: 2048
# Batch size: 16
# Train accuracy: 90.8% (target: 90.0%) ✅
# Train time: 3.8 hours (8 NPUs)
# Throughput: 720 samples/s (target: 600 samples/s) ✅
# ========================================
示例 3:3D-RCNN 训练
# 1. 进入 3D-RCNN 目录
$ cd ../3drcnn
# 2. 准备数据(需要申请权限)
$ # 假设你已经有 3drcnn 数据集
$ ln -s /path/to/3drcnn_data ./data
# 3. 修改配置
$ vi configs/optimal.yaml
# 修改:
# model: "3drcnn"
# num_points: 4096
# batch_size: 8
# 4. 运行训练
$ bash run_training.sh
# 输出:
# ========================================
# 3D-RCNN Training Benchmark
# ========================================
# Dataset: ScanNet
# Points: 4096
# Batch size: 8
# Train mAP: 65.2% (target: 65.0%) ✅
# Train time: 12 hours (8 NPUs)
# Throughput: 25 samples/s (target: 20 samples/s) ✅
# ========================================
示例 4:自定义模型
# 1. 创建新的配方目录
$ mkdir my_model
$ cd my_model
$ mkdir configs scripts
# 2. 写配置文件
$ vi configs/optimal.yaml
# 内容:
# model:
# name: "my_model"
# num_classes: 10
# num_points: 1024
#
# training:
# epochs: 200
# batch_size: 32
# learning_rate: 0.001
#
# data:
# dataset: "MyDataset"
# data_dir: "/data/mydataset"
# 3. 写训练脚本
$ vi scripts/train.py
# 内容:参照其他配方的 train.py
# 4. 运行
$ bash run_training.sh
性能数据
用 cann-recipes-spatial-intelligence 的性能提升:
| 模型 | 自己调优 | 用配方 | 提升 |
|---|---|---|---|
| PointNet | 85.0% | 89.2% | +4.2% |
| PointNet++ | 88.0% | 90.5% | +2.5% |
| 3D-RCNN | 60.0% | 65.2% | +5.2% |
你说气人不气人,官方配方就是更好。
跟其他仓库的关系
cann-recipes-spatial-intelligence 在 CANN 架构里属于第 2 层(昇腾计算服务层),是空间智能最佳实践集合。
依赖关系:
cann-recipes-spatial-intelligence(空间智能配方)
↓ 使用
ops-nn / ops-cv(算子库)
↓ 调用
昇腾 NPU
解释一下:
- cann-recipes-spatial-intelligence:空间智能配方集(配置文件+脚本)
- ops-nn / ops-cv:底层算子库
- 昇腾 NPU:硬件
简单说:cann-recipes-spatial-intelligence 是空间智能的"菜谱"。照着做,性能不会差。
cann-recipes-spatial-intelligence 的核心内容
1. 模型配方
# 支持的模型
pointnet/ # 点云分类
pointnet2/ # 点云分类/分割
3drcnn/ # 3D 目标检测
voxelnet/ # 点云 3D 检测
2. 配置文件
# configs/optimal.yaml
model:
name: "..."
num_classes: 40
num_points: 1024
training:
epochs: 200
batch_size: 32
learning_rate: 0.001
data:
dataset: "ModelNet40"
data_dir: "..."
3. 训练/推理脚本
# scripts/train.py
def main():
# 加载配置
# 创建模型
# 训练循环
# 保存模型
4. 文档
# README.md
# - 模型介绍
# - 性能数据
# - 使用方法
# - 常见问题
适用场景
什么情况下用 cann-recipes-spatial-intelligence:
- 3D 视觉:点云处理
- 空间智能:三维重建
- 性能调优:自己调不明白
什么情况下不用:
- 2D 视觉:用 cann-recipes-infer
- 自定义模型:自己写
总结
cann-recipes-spatial-intelligence 就是昇腾的"空间智能菜谱":
- 模型配方:各种空间智能模型的配置
- 性能调优:官方调优过的参数
- 拿来就用:省时间,性能好
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