Java Multithreading and Parallel Programming Masterclass - Amdahl's Law

The video tutorial introduces Mdal's Law, a fundamental concept in parallel computing, developed by Jean MDL in 1967. It explains how the law helps estimate the speed up of a program based on its serial and parallel sections. The tutorial covers the concept of speed up, using latency as a performance metric, and demonstrates how to apply Mdal's Law to predict performance improvements. It also discusses the limitations of the law, emphasizing that the overall speed up is constrained by the serial portion of the program, even with an infinite number of CPUs.

Who developed the Mdal's Law and in which year was it published?

• Alan Turing, 1950

• Jean MDL, 1967

• John von Neumann, 1945

• Grace Hopper, 1965

What does the speedup of a program indicate?

• The size of the program

• The improvement in execution time

• The amount of memory used

• The number of CPUs used

Why does the overall execution time not decrease significantly even with more CPU cores?

• Because of the parallel section

• Due to network latency

• Because of insufficient memory

• Due to the serial section

What does Mdal's Law help estimate before performing optimization?

• The energy consumption

• The potential performance gains

• The cost of new hardware

• The number of bugs in the code

What is the theoretical limit of speedup when using an infinite number of CPUs?

• It doubles

• It is limited by the serial section

• It is limited by the parallel section

• It becomes infinite