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No clock drift (timer) issue with Skylake

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Just a quick thread to show there is no RTC or clock drift issue with Skylake when changing the BCLK at runtime.


Test: Skylake i7 6700K with RTC enabled in Windows 10. Based on the findings described here, we would expect a difference in benchmark result from running 41x100, 40x102.5, and 42x97.6. Specifically, 42x would be approximately 3.4% faster than 41x.


In our test we find that:

  • 40x102.5: 8.977 sec
  • 41x100: 8.983 sec
  • 42x97.6: 8.999 sec

This confirms with the hypothesis that Skylake isn't affected by clock drift.


The real technical reason is that the BCLK frequency is now a separate ICC and is no longer tied to the other clock frequencies.











Edited by Massman
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