A given processor requires $1000$ cycles to perform a context switch and start an

interrupt handler and $1500$ number of cycles to switch back to the program that

was running when the interrupt occurred, or $500$ cycles to poll an I$/$O device. An

I$/$O device attached to that processor makes $200$ requests per second, each of

which takes $12,500$ cycles to resolve once the handler has been started. By default

$,$ the processor polls every $0\mathrm{.}25ms$ if it is not using interrupts

a$.$ How many cycles per second does the processor spend handling I$/$O from the

device if interrupts are used?

b$.$ How many cycles per second are spent on I$/$O if polling is used $($include all

polling attempts$)?$ Assume the processor only polls during time slices when user

programs are not running, so do not include any context$-$switch time in your

calculation

$2$

c$.$ How often would the processor have to poll for polling to take as many cycles per

second as interrupts.

$2$ A given processor requires $1000$ cycles to perform a context switch and start an

interrupt handler and $1500$ number of cycles to switch back to the program that

was running when the interrupt occurred $,$ or $500$ cycles to poll an I$/$O device. An

I$/$O device attached to that processor makes $200$ requests per second, each of

which takes $12,500$ cycles to resolve once the handler has been started. By default

$,$ the processor polls every $0\mathrm{.}25$ ms if it is not using interrupts

a$.$ How many cycles per second does the processor spend handling I$/$O from the

device if interrupts are used? $[2]$

b$.$ How many cycles per second are spent on I$/$O if polling is used $($include all

polling attempts$)?$ Assume the processor only polls during time slices when user

programs are not running, so do not include any context$-$switch time in your

calculation $[2]$

c$.$ How often would the processor have to poll for polling to take as many cycles per

second as interrupts.