Constant RT_BUDGET_TICKS 

const RT_BUDGET_TICKS: u64 = 100;

RT budget per period in ticks.

An RT task that consumes this many ticks within a single budget period is temporarily degraded to Fair class until the period expires. This prevents a single RT task from permanently starving Fair tasks.

At TIMER_HZ=100: 100 ticks = 1 second of wall-clock time.