项目场景：

问题描述

terminate called after throwing an instance of ‘xxxxxx’
编译没问题，但运行出错

原因1：内存不足

解决方案：

查看当前所有可用的GPU，选择使用率较低的设备。

在代码里

import os
os.environ[‘CUDA_VISIBLE_DEVICES’] = ‘0’

或者在terminal选其他GPU即可解决

export CUDA_VISIBLE_DEVICES=3

原因2:传入了错误指针/参数

要注意引用、指针的使用是否正确，尤其涉及host端和device端的互相传输的时候。

原因3: block线程数超出了GPU 的限制

每个block设定的线程数超出了GPU 的限制，如NVIDIA GeForce RTX 3080的maxThreadsPerBlock为1024（可以通过getDevice Properties读到），若CUDA编程时给block里的线程数超出1024，则会报如上error：

dimBlock(32, 32, 1); // 正好1024，则正常运行
dimBlock(33,32, 1); // 超出1024，报错

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