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What is the purpose of DMA logic?
Weegy: The DMA logic unit controls the connection of selected one of the I/O peripheral devices to the memory subsystem for direct transfer or data therebetween, when the I/O peripheral devices place a request. [ The DMA logic unit includes a base address register, a base count register and a DMA controller. ] User: What is the purpose and technique of DMA logic? (More)
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Updated 10/1/2012 4:10:09 PM
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The techniques of DMA logic are:

- using caching techniques to keep data pinned as long as possible, producing overhead reductions for applications that repeatedly - communicate in the same memory area
pipelining memory pinning operations and data transfer (as done on Infiniband or Myrinet)
deferring memory pinning out of the critical path, thus hiding the latency increase
entirely removing the need for pinning (as Quadrics does)
Added 10/1/2012 4:10:13 PM
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