DMA (DirectMemoryAccess) technology is one of the best solutions which could meet the requirements of real-time and accuracy for information processing.
The SPEs access main storage with directmemoryaccess (DMA) commands that move data and instructions between main storage and a private local memory, called a local store or local storage (LS).
The first copy (see Figure 1) is performed by the directmemoryaccess (DMA) engine, which reads file contents from the disk and stores them into a kernel address space buffer.