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我正在编写一个基于cuda的程序,它需要定期将一组项目从GPU传输到主机内存。为了保持进程异步,我希望使用cuda的UMA在主机内存中有一个内存缓冲区和标志(这样GPU和CPU都可以访问它)。GPU将确保该标志被清除,将其项目添加到缓冲区,并设置该标志。CPU等待标志被设置,将数据从缓冲器中复制出来,并清除标志。据我所知,这不会产生任何竞争条件,因为它迫使GPU和CPU轮流,总是读取和写入彼此相对的标志。#include <stdio.h>
void u