def compute_simulation_stats(self):
# run here the code to summarize statistics from this specific run
if self.plot_simulation_progress:
plots.plot_simulation_progress(self)
# add here the code to include other statistics you may want
self.results[self.policy.name][self.load].append({
'request_blocking_ratio':
self.get_request_blocking_ratio(),
'average_link_usage':
np.mean([
self.topology[n1][n2]['utilization']
for n1, n2 in self.topology.edges()
]),
'individual_link_usage': [
self.topology[n1][n2]['utilization']
for n1, n2 in self.topology.edges()
],
'average_node_usage':
np.mean([
self.topology.nodes[node]['utilization']
for node in self.topology.graph['dcs']
]),
'individual_node_usage': {
node: self.topology.nodes[node]['utilization']
for node in self.topology.graph['dcs']
}
})
def setup_next_arrival(self):
"""
Returns the next arrival to be scheduled in the simulator
"""
if self._processed_arrivals > self.num_arrivals:
return None # returns None when all arrivals have been processed
at = self.current_time + self.rng.expovariate(1 / self.mean_service_inter_arrival_time)
ht = self.rng.expovariate(1 / self.mean_service_holding_time)
dst = src = self.rng.choice([x for x in self.topology.nodes()])
while src == dst:
dst = self.rng.choice([x for x in self.topology.nodes()])
src_id = self.topology.graph['node_indices'].index(src)
dst_id = self.topology.graph['node_indices'].index(dst)
self._processed_arrivals += 1
if self._processed_arrivals % self.track_stats_every == 0:
self.tracked_results['request_blocking_ratio'].append(self.get_request_blocking_ratio())
self.tracked_results['average_link_usage'].append(np.mean([(self.topology[n1][n2]['total_units'] - self.topology[n1][n2]['available_units']) / self.topology[n1][n2]['total_units'] for n1, n2 in self.topology.edges()]))
if self._processed_arrivals % self.plot_tracked_stats_every == 0:
plots.plot_simulation_progress(self)
#TODO: number of units necessary can also be randomly selected, now it's always one
next_arrival = Service(self._processed_arrivals, at, ht, src, src_id, dst, dst_id, number_units=1)
self.add_event(Event(next_arrival.arrival_time, events.arrival, next_arrival))