keep asking why until the answer becomes physics
can a task that requires 6 billion cpu cycles every second run in real time on a single 5 ghz core?
no.
a 5 ghz core contains a maximum budget of:
`5 * 10^9 cycles per second`
the workload requires:
`6 * 10^9 cycles per second`
the utilization required is therefore:
`rho = demand / capacity = 6 / 5 = 1.2`
120%.
if the task is finite, it needs at least 1.2 seconds of cpu time.
if a new task arrives every second, the system accumulates 1 billion cycles of unfinished work every second.