Is the most general and least usefulperformance metrics for risc machines
o mips
o instruction count
o number of registers
o clock speed

Instruction Count

Explanation:

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.

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make sure each item is its own paragraph.