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Use temperature-based hysteresis #513

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crawfxrd opened this issue Jan 4, 2025 · 0 comments
Open

Use temperature-based hysteresis #513

crawfxrd opened this issue Jan 4, 2025 · 0 comments
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priority:high severity:medium

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@crawfxrd
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crawfxrd commented Jan 4, 2025

We currently use a time-based hysteresis of the duty (output value). This method results in poor behavior of fans.

With HEATUP, it can result in:

  • slow response of increasing temps that could lead to the CPU throttling before fan reaches its max point

With COOLDOWN, it can result in:

  • fans being held at higher duties than necessary over periods of time
    • such as short temp spike at start of a CPU-intense workload like compilation
  • not reducing temps sufficiently below the point threshold, resulting in rapid oscillation of fan duty
    • noticeable at point 0, which can result in near-constant fan on/off

Use a temperature-based (input value) hysteresis instead.
@crawfxrd crawfxrd changed the title Use temperature-based hyteresis Use temperature-based hysteresis Jan 4, 2025
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