I'm a little confused about your request. What do you mean by "real-time performance statistics for the simulated system"? Generally speaking, cycle-accurate

I'm a little confused about your request. What do you mean by "real-time performance statistics for the simulated system"? Generally speaking, cycle-accurate simulators usually require a very accurate software model (or, are done by running the RTL in simulation) so it's hard to find that level of model without manufacturer assistance, and even then you'll have to extend it to beyond the CPU. Emulators like QEMU basically slow down execution on a modern system to give you the same observable performance but obviously don't model the system accurately. What's your ultimate goal?