In parallel computing, Amdahl’s law is mainly used to predict the theoretical maximum speedup for program processing using multiple processors. If we denote the speed up by S then Amdahl’s is given by the formula :

*S=1/((1-P)+(P/N)*

where ** P** is the proportion of a system or program that can be made parallel, and

**is the proportion that remains serial. My question is how can we compute or estimate**

*1-P***for a given program ?**

*P*More specifically, my question has two parts:

how can we compute ** P** theoretically? how can we compute

**in practice? I know my question could be easy but I am learning.**

*P*ref : https://www.techopedia.com/definition/17035/amdahls-law