Question

consider a new hardware feature that increases the performance of an operation by 8 times. if you wanted to achieve an overall speedup of 4, what fraction of program execution time would need to be converted to using the new feature?

Answer 1

The fraction of time that a quicker mode of execution may be employed will determine how much performance increase can be achieved.

What are the two factors that Amdahl's law depends on?

• It is possible to divide a job carried out by a system into two parts: one that does not benefit from the system's enhanced resources and one that does. This is done by comparing the work to one carried out by a system whose resources are improved to one that had similar resources at the beginning.
• According to Amdahl's Law, the amount of time that can be spent employing a quicker method of execution will determine how much performance can be improved.
• the fraction of time that a quicker mode of execution may be employed will determine how much performance increase can be achieved.

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