I ran JVM on Ryzen 3300X, and I got following `jdk.CPUTimeStampCounter` event.

```
jdk.CPUTimeStampCounter {
  startTime = 10:41:14.993
  fastTimeEnabled = false
  fastTimeAutoEnabled = true
  osFrequency = 1000000000
  fastTimeFrequency = 1000000000
}
```

I confirmed 3300X supports Invariant TSC (so `fastTimeAutoEnabled` is set to `true`), however it does not seem to be used (`fastTimeEnabled` is `false`).

Frequency is come from brand string from CPUID (e.g. "Intel(R) Core(TM) i3-8145U CPU @ 2.10GHz"). However AMD processor (Ryzen at least) does not have it ("AMD Ryzen 3 3300X 4-Core Processor").
Fortunately rdtsc_x86.cpp can calculate the frequency like bogomips. We should fallback to it if we cannot get the frequency even if invariant TSC is supported.