Question

____________ is the most general and least usefulperformance metrics for RISC machines

Answer 1

Answer:

Instruction Count

Explanation:

$\text{Performance}=(\frac{\text{Instruction}}{\text{Program}} )\times(\frac{\text{clocks}}{\text{instruction}})\times(\frac{\text{seconds}}{\text{clock}})$

This is the formula for the Performance of Risc machines,as execution time is a product of three factors that are relatively independent of each other.As we can see that performance is directly related to the Instruction count,Clock speed and Number of registers.  

Instruction count (IC) is the most general and least useful performance metrics : the complete number of executions involving instruction in a program. Repetitive activities like loops and recursions dominate it.

Answer 2

Answer: Instruction count

Explanation: Instruction count is the most general and least useful performance matrix for RISC machine because RISC is known for the reduced set of instruction so indirectly the instructions are less so there is not much requirement of keeping the count of instruction.other features mentioned in the question describes the performance factor of RISC machine and are the major factor behind the working of the RISC machine.