My processor noted that an infinite number of processors will allow me to test how much speedup I can achieve. I am not exactly sure how this applies. For instance, let's say I have a program that takes $1000$ seconds to execute and is broken into 4 phases(A, B, C, D). If two of the phases are $50%$ parallelizable and the other $2$ are not parallelizable at all, how can I apply the concept that I have infinite available processors to figure out how much maximum speed up I can achieve? I attached numbers to my example, but a generic one would be just as helpful. If I am to strictly just apply Amdahl's law, I'd say the answer is just $1/(1-0.5) = 2$ times faster.
Amdahl's law of processors (infinite processors to test limits of speedup)
parallel computing
Don't think of it as you've been given infinity processors. Think of it as you can have as many processors as you want, but of course after a certain point more professors won't help, so find out how fast you can make it run with the optimum number of processors.