Hit "Step" to advance once. Hit "Run" to advance lots.

If you want to see the big (fast) picture, suggest you set:

• Width=32+
• Batch-Stepper
• WebGL
• Disable show-events

Single-stepper / Event-mode

In event mode the edges are simulated as channels with a single buffer slot. When a node sends, a copy is placed in all channels (and it turns green). If any outgoing edge currently has a message, then the source node will be unable to send until that message is received by the target (i.e. that node is blocked).

• Nodes:
  • Grey border : idle (waiting for messages)
  • Green border : ready (want to send, and not blocked)
  • Red border: blocked (want to send, blocked by one or more edges)
• Edges:
  • Grey edge: channel currently empty
  • Green edge: message pending in channel

Batch stepper

The batch stepper will ignore channel buffers, and allow a device to send its message and immediately call the send handler on all target devices. All devices that are ready to send get a chance to send one message in each frame. This is a lot faster to simulate, but is less realistic in terms of messages and blocking.