func (d *Director) Start() {
rng := state.NewRand("director")
// Set up directories
d.agents.Prepare()
// Populate initial link latencies
for _, link := range d.net.Links() {
link.SetLatency(d.makeLatency(rng, 1))
link.SetJitter(d.makeJitter(rng, 1))
}
d.net.Start()
d.agents.Start()
}
func (h *Harness) queryGenerator() {
rng := state.NewRand("querier")
for i := 1; true; i++ {
query := h.generateQuery(rng)
agentNo := rng.Intn(len(h.agents))
node := h.agents[agentNo]
h.request <- &request{
id: i,
node: node,
query: query,
}
state.SetLastGeneratedRequest(i)
}
}
func (h *Harness) boot() bool {
rng := state.NewRand("boot")
bootQuery := h.generateInitialQuery()
i := rng.Intn(len(h.agents))
node := h.agents[i]
for !h.issueQuery(0, node, bootQuery) {
time.Sleep(100 * time.Millisecond)
select {
case <-state.WaitGroup().Quit:
return false
default:
}
}
return true
}
func (d *Director) spawn(name string) {
rng := state.NewRand("monkey " + name)
c := d.config[name]
monkey := d.monkey(name)
start := time.Now()
keep_going := true
time.Sleep(c.offset)
for keep_going {
time.Sleep(time.Duration(rng.ExpFloat64() * float64(c.frequency)))
dt := time.Now().Sub(start)
intensity := (1 - math.Cos(float64(dt)/MONKEY_PERIOD)) / 2
keep_going = monkey(rng, intensity)
}
}