A direct memory address (DMA) is normally used to transfer information directly between devices, bypassing the CPU.

一个直接的存储器位址(DMA)通常被用在装置之间直接地传递信息，省略处理器。

youdao

The first copy (see Figure 1) is performed by the direct memory access (DMA) engine, which reads file contents from the disk and stores them into a kernel address space buffer.

直接内存存取(direct memory access, DMA)引擎执行了第一次拷贝(参见图1)，它从磁盘中读取文件内容，然后将它们存储到一个内核地址空间缓存区中。

youdao