intrctl —
program to control interrupts
  
    | intrctl | command [options] | 
The intrctl command can be used to control and inspect
  the state of interrupts in the system.
The first argument, command, specifies the
    action to take. Valid commands are:
  - affinity -ccpu_index-iintrid
- set an intrid interrupt's affinity to
      cpu_index.
- intr -ccpu_index
- enable to set an interrupt's affinity to cpu_index.
      If cpu_index is already enabled, this command has no
      effect.
- list [-c]
- for each intrid in the system, display interrupt counts per CPU. The
      intrid is an interrupt name such as "ioapic0 pin 22" for x86.
    If -cis specified, display compact
        list with total counts per interrupt, and CPU affinity as comma
        separated list of CPU indexes.
 
- nointr -ccpu_index
- disable to set an interrupt's affinity to cpu_index.
      If cpu_index is already disabled, this command has
      no effect.
intrctl first appeared in NetBSD
  8.0.