2 ms·
Using IPC as a proxy for utilization is tricky because an out-of-order machine can only get that max IPC if the instructions it is executing are not dependent o
by willvarfar 10y ago
Using IPC as a proxy for utilization is tricky because an out-of-order machine can only get that max IPC if the instructions it is executing are not dependent on not-yet-computed instructions.
In-order CPUs are much easier to reason about; you can literally count the stalled cycles.