True or false: (a) The definition of the parallel execution time is: “execution time = computation time + communication time + idle time.” (b) A simple model of the communication time...

True or false:

(a) The definition of the parallel execution time is: “execution time = computation time + communication time + idle time.”

(b) A simple model of the communication time is:“communication time = setup time + data transfer time.”

(c) Suppose that the execution time of a program on a single processor is T1,

and the execution time of the same parallelized program on p processors is Tp.

Then, the speedup and efficiency are S = T1/Tp and E = S/p, respectively.

(d) If speedup S <> 1.