Section $1\mathrm{.}11$ cites as a pitfall the utilization of a subset of the performance

equation as a performance metric. To illustrate this, consider the following two

processors. P$1$ has a clock rate of $4$ GHz$,$ average CPI of $0\mathrm{.}9,$ and requires the

execution of $5\mathrm{.}0$E$9$ instructions. P$2$ has a clock rate of $3$ GHz$,$ an average CPI of

$0\mathrm{.}75,$ and requires the execution of $1\mathrm{.}0$E$9$ instructions.