Is there a specific way in which DMA might ease the system's concurrent nature? Explain how it complicates hardware design.

Database System Concepts
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ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Is there a specific way in which DMA might ease the system's concurrent nature? Explain how it complicates hardware design.

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Most computers include a capability called "direct access to memory" that enables certain hardware submodules to access the system's reading and writing memory.

DMA enhances device concurrency when the DMA device transports data over the system or memory buses by allowing the CPU to undertake a job.

As the DMA controller must be integrated into the system and the system must let a bus master to serve as the DMA controller, the hardware design is complicated.

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