Lazy ass example for reading Ryzen Performance Monitor Counters (PMC) as defined in the Open-Source Register Reference For AMD Family 17h ProcessorsModels 00h-2Fh.

Currently reading the following counters:

• IS: PMCx0C1 [Retired Uops]
• BI: PMCx0C2 [Retired Branch Instructions]
• LS: PMCx029 [LS Dispatch]
• FP: PMCx0CB [Retired MMX™/FP Instructions]
• FM: PMCx003 [Retired SSE/AVX Operations]
• OI: IS-(BI+LS+FP+FM)

Displayed as "GI", meaning "Giga Instructions per Second".

Using WinRing0.