Explain why accurate branch prediction is important for perf

Explain why accurate branch prediction is important for performance on a pipelined processor. Explain why accurate branch prediction is important for power efficiency. Explain how increasing the length of the pipeline is expected to improve the performance of the pipelined datapath. Give one example each of an interrupt and an exception.

Solution

1> Accurate branch prediction is important for performance on a pipelined processor because of multiple instrustion issue, object oriented programming and dual of Amdahl\'s Law.

2>Energy efficiency is of the utmost importance , so if accurate branch prediction is not done than power will be wasted causing lot of power.

3> Pipeling increases the speed up of the processer.

4> Interrupt is generated by hardware, like UART , where as exception is software level or generated by operating system for example killing any task .