I tried to reimplement Linux’s algorithm in [1], but I cannot be sure about correctness. They adjust the fixed sizes at construction based on device’s total memory, so it varies if a phone or server. This fast trace simulation in the CI [2] may be informative (see DClock). Segmentation is very common, where algorithms differ by how they promote and how/if they adapt the sizes.

[1] https://github.com/ben-manes/caffeine/blob/master/simulator/...

[2] https://github.com/ben-manes/caffeine/actions/runs/130865965...