Q$\mathrm{.}5.$ I$/$O

$[20$ marks$]$

You are given three scenarios where data transfer is performed using different I$/$O techniques: Programmed I$/$O$,$ Interrupt$-$Driven I$/$O$,$ and Direct Memory Access $($DMA$).$ You need to calculate the total time taken for each method given the following parameters:

$-$ Data Size: $10,000,000$ bytes

$-$ Programmed I$/$O Transfer Rate: $100,000$ bytes$/$second

$-$ Interrupt$-$Driven I$/$O Transfer Rate: $500,000$ bytes$/$second

$-$ DMA Transfer Rate: $5,000,000$ bytes$/$second

$-$ Interrupt Overhead: $10$ ms per interrupt $($assume $5$ interrupts are needed$)$

$-$ CPU Processing Time per byte for Programmed I$/$O: $0\mathrm{.}005$ ms $(54$ s $)$

a$)$ Calculate the total time taken for each I$/$O technique to transfer the $10$ MB of data.

b$)$ Determine the most efficient transfer method based on your calculations.

Answer