Test results in the following output:

$ perl examples/iothreadsinfo.pl
Addr
VMM type: QEMU
...
Domain: {
  ID: 2 'f18iothr'
  UUID: fb9f7826-b5d7-4f74-b962-7181ef3fc9ec
  IOThread: {
    affinity: 0010
    number: 1
  }
  IOThread: {
    affinity: 0001
    number: 2
  }
  IOThread: {
    affinity: 1100
    number: 3
  }
}