AMD/Zen (1054) Instructions Retired Performance Counter May Be Inaccurate

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AMD errata

1. If you are getting erratic values from the Instructions counter:

2. Disable CC6 from the Performance Monitoring window:

3. Counter will fix up but temperature may increase:

As a permanent workaround, two solutions:

1. Global C-State can be disabled in BIOS
2. Start the CoreFreq driver with the following argument:

insmod corefreqk.ko CC6_Enable=0