DMA (Direct Memory Access) frees the CPU from these menial tasks. With DMA, peripheral devices do not have to ask the CPU to fetch some data for them, but can do it themselves.

In this article we discussed DMAdata flow structures ” register-based and descriptor-based ” and whento use each type. Next time in Part 3, we'll look at some advanced DMAfeatures that assist with ...

For devices whose drivers do not support memory isolation, Windows will block their DMA access until the user logs into the system or unlocks their screen. Flow chart of Kernel DMA Protection when ...

The top left chart is the interesting one as far as we are concerned. To read 64 bytes of data, RDMA needs to do two direct memory operations, which means it has twice the PCI-Express transfer and ...