def test_block(self): # Test that packets are not generated when the link is blocked. scheduler = Scheduler() system = SpiNNakerSystem(scheduler, 10) link = DeadLink(scheduler) # Uniform generator node tg = SpiNNakerTrafficGenerator( scheduler , system , 1 , 0.1 , link , link ) tg.set_mesh_dimensions(100,100) tg.set_mesh_position(50,50) it = scheduler.run() # Perform 1000 cycles while it.next() < 2000 and tg.counters["generator_cycles"] < 1000: pass # Should have done 1000 cycles self.assertEqual(tg.counters["generator_cycles"], 1000) # We should have tried to send some number of packets that isn't all the # time and not never (well, in theory we might not but hey, if this is going # wrong you've got a bad day on your hands). self.assertTrue(10 < tg.counters["generator_dropped_packets"] < 1000) # None should have gone out self.assertEqual(tg.counters["generator_injected_packets"], 0)
def test_normal(self): # Test that packets are generated appropriately when distributing with a # normal distribution. scheduler = Scheduler() system = SpiNNakerSystem(scheduler, 10) # Share the same link for sending and receiving, that way the module cleans # up after itself! link = BufferLink(scheduler) # Uniform generator node tg = SpiNNakerTrafficGenerator( scheduler , system , 1 , 0.1 , link , link , 10 ) tg.set_mesh_dimensions(100,100) tg.set_mesh_position(50,50) it = scheduler.run() # Perform 1000 cycles while it.next() < 2000 and tg.counters["generator_cycles"] < 1000: # We may have a packet if link.can_receive(): # Check the packet is targeted somewhere in the mesh packet = link.receive() self.assertTrue(all(0 <= dimension < 100 for dimension in packet.destination)) # XXX: Should probably check that distribution is appropriate too but meh... # Should have done 1000 cycles self.assertEqual(tg.counters["generator_cycles"], 1000) # We should have sent some number of packets that isn't all the time and not # never (well, in theory we might not but hey, if this is going wrong you've # got a bad day on your hands). self.assertTrue(10 < tg.counters["generator_injected_packets"] < 1000) # None should be dropped self.assertEqual(tg.counters["generator_dropped_packets"], 0)
def __init__( self , scheduler , system , injection_buffer_length , router_period # SpiNNakerRouter , wait_before_emergency # SpiNNakerRouter , wait_before_drop # SpiNNakerRouter , core_period # SpiNNakerTrafficGenerator , packet_prob # SpiNNakerTrafficGenerator , distance_std = None # SpiNNakerTrafficGenerator ): """ injection_buffer_length is the number of packets that can be buffered internally before they're routed. router_period see SpiNNakerRouter wait_before_emergency see SpiNNakerRouter wait_before_drop see SpiNNakerRouter core_period see SpiNNakerTrafficGenerator packet_prob see SpiNNakerTrafficGenerator distance_std see SpiNNakerTrafficGenerator """ self.scheduler = scheduler self.system = system # Links between the router and traffic generator injection_link = BufferLink(self.scheduler, injection_buffer_length) exit_link = BufferLink(self.scheduler) # The external connections to the rest of the world self.in_links = [DeadLink(self.scheduler)]*6 self.out_links = [DeadLink(self.scheduler)]*6 self.traffic_generator = SpiNNakerTrafficGenerator( self.scheduler , self.system , core_period , packet_prob , injection_link , exit_link , distance_std ) self.router = SpiNNakerRouter( self.scheduler , self.system , injection_link , exit_link , self.in_links , self.out_links , router_period , wait_before_emergency , wait_before_drop )
def test_receive(self): # Test that packets are received by the unit scheduler = Scheduler() system = SpiNNakerSystem(scheduler, 10) # Share the same link for sending and receiving, that way the module cleans # up after itself! link = BufferLink(scheduler) packet = SpiNNakerP2PPacket(system, None, (0,0), 1) # Uniform generator node tg = SpiNNakerTrafficGenerator( scheduler , system , 1 , 0 , link , link , 10 ) tg.set_mesh_dimensions(100,100) tg.set_mesh_position(50,50) it = scheduler.run() # Perform 10 cycles, injecting some packets each time while it.next() < 20 and tg.counters["generator_cycles"] < 10: self.assertTrue(link.can_send()) link.send(packet) # Should have done 10 cycles self.assertEqual(tg.counters["generator_cycles"], 10) # We should have sent no packets self.assertEqual(tg.counters["generator_injected_packets"], 0) # None should be dropped self.assertEqual(tg.counters["generator_dropped_packets"], 0) # Should have received 10 packets self.assertEqual(tg.counters["generator_packets_received"], 10)
class SpiNNaker101(object): """ A single SpiNNaker chip, a 101 machine in SpiNNaker parlance. Contains a traffic generator and router. The links from the router are initially dead. """ def __init__( self , scheduler , system , injection_buffer_length , router_period # SpiNNakerRouter , wait_before_emergency # SpiNNakerRouter , wait_before_drop # SpiNNakerRouter , core_period # SpiNNakerTrafficGenerator , packet_prob # SpiNNakerTrafficGenerator , distance_std = None # SpiNNakerTrafficGenerator ): """ injection_buffer_length is the number of packets that can be buffered internally before they're routed. router_period see SpiNNakerRouter wait_before_emergency see SpiNNakerRouter wait_before_drop see SpiNNakerRouter core_period see SpiNNakerTrafficGenerator packet_prob see SpiNNakerTrafficGenerator distance_std see SpiNNakerTrafficGenerator """ self.scheduler = scheduler self.system = system # Links between the router and traffic generator injection_link = BufferLink(self.scheduler, injection_buffer_length) exit_link = BufferLink(self.scheduler) # The external connections to the rest of the world self.in_links = [DeadLink(self.scheduler)]*6 self.out_links = [DeadLink(self.scheduler)]*6 self.traffic_generator = SpiNNakerTrafficGenerator( self.scheduler , self.system , core_period , packet_prob , injection_link , exit_link , distance_std ) self.router = SpiNNakerRouter( self.scheduler , self.system , injection_link , exit_link , self.in_links , self.out_links , router_period , wait_before_emergency , wait_before_drop ) def set_mesh_dimensions(self, w, h): """ Set the size of the mesh of chips this system is in. """ self.traffic_generator.set_mesh_dimensions(w,h) self.router.set_mesh_dimensions(w,h) def set_mesh_position(self, x, y): """ Set the size of the mesh of chips this system is in. """ self.traffic_generator.set_mesh_position(x,y) self.router.set_mesh_position(x,y) def get_mesh_position(self): """ Set the size of the mesh of chips this system is in. """ return self.router.get_mesh_position() def set_in_link(self, direction, link): """ Set the given link to the link specified. """ self.in_links[direction] = link def set_out_link(self, direction, link): """ Set the given link to the link specified. """ self.out_links[direction] = link def get_in_link(self, direction): """ Get the link specified. """ return self.in_links[direction] def get_out_link(self, direction): """ Get the link specified. """ return self.out_links[direction]
