NPTEL assignment

Question

A DMA controller transfers 32-bit words from an input device to memory in one clock cycle using cycle stealing. The input device transmits data at a rate of 9600 bytes per second. The CPU is fetching and executing instructions at an average rate of 2,000,000 instructions per second (assume 32-bit instructions). The CPU will be slowed down because of the DMA transfer by …………….. percent.

I am getting 0.12 as the answer but they have given 0.24 please check

Comments

I'm also getting 0.12 .

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ya I am also getting 0.12.

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I saw this question.. they mistakenly took 100000 insted of 200000

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Okay thanks!

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@Somoshree Datta 5

I got ans too 0.12

but my question is why in case of DMA we got cycle stealing, but input device there is no cycle stealing?

 

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srestha maam

Cycle stealing mode is applicable only for DMA transfer.It isnt applicable for data transfer via input device.