Like profile-
n
probes, tick-
n
probes fire every fixed interval at high interrupt level. However, unlike profile-
n
probes, which fire on every CPU, tick-
n
probes fire on only one CPU per interval. The actual CPU may change over time. As with profile-
n
probes, n
defaults to rate-per-second but may also have an optional time suffix. tick-
n
probes have several uses, such as provideing some periodic output or taking a periodic action.