Question

System A has two processors. Program X takes 10 seconds to execute on one of the processors. Program Y takes 10 seconds to execute in parallel on the other processor. System B has a single processor that can execute only one program at a time. Program X takes 6 seconds to execute on this processor. Program Y takes 6 seconds to execute on this processor. Which system would you pick if you cared about overall system throughput?

Answer 1

Let is consider that both the processes are submitted at the same time to system A.
System A would then instantly start programming X on one processor and Y on another.

Assuming that multi-processing is not allowed on system B. System B would have to wait 6 seconds for the first process
to finish until it starts second one, so its clear that response times are quicker on system A

Hence, I would pick system A if I cared about program response time. Throughput is calculate by average time spent by turnaround time.

System A:
Program A (1st -10th second) total = 10 seconds
Program B (1st -10th second) total = 10 seconds
On average it takes 5 seconds (=10/2)

System B:
Program X (1st 6th second) = total of 6 seconds
Program Y(6th =12th second) = total of 12 seconds

On average its takes 6 seconds (=12/2)

So it obvious we should go with system A