Linux's default varies per architecture & platform. For a long, long time on ARM it still defaulted to 100hz. I think it's more like 250hz or 500hz now? You'll

Linux's default varies per architecture & platform. For a long, long time on ARM it still defaulted to 100hz. I think it's more like 250hz or 500hz now? You'll also see x86 desktop-focused build set it to 1000hz. But scheduling happens far more often than this tick rate, too, so it's only preemption for busy threads and controls the timing windows for things like DVFS.