pub const MIN_CALIBRATION_TICKS: u64 = 190;Expand description
The fewest local-timer interrupts a calibration must see, summed over its
clean spins. CALIBRATION_SLACK is absolute, so this floor is what keeps
the binding tight: at 190 interrupts the counter must see at least 180 of
them, about 95%, when the reads around the spins take no time. (A single
70 ms spin sees about 70, where the slack alone would admit about 86%.) A
tickless (nohz_full) CPU sees almost none, and there the binding says
nothing.