Example 4

The following example is of a 2D-Mesh networked system. The software application flow-graph described in Example-1 was mapped to the mesh hardware architecture shown below. The modeled system contains 81 processors on nine boards.

(Click to see detail.)

Animation of the networked system during simulation.

The above snapshot depicts the animation of instantaneous transfers and operations for the mapped application flow-graph onto the nine-board system. The processor nodes are colored to indicate when they are performing specific tasks. The C40 data-links are colored to indicate when data is flowing through them. The snapshot features CSIM's ability to display a hierarchical block-diagram as a flattened graph during simulation. The architecture contained two levels of hierarchy. Note that because this is a flattened diagram, sub-diagrams were expanded in-place, so the I/O vias on the boundary of the sub-diagrams do not necessarily align with their connections on the outer diagram.

The following are the processing time-line graphs that resulted from the simulation. The processing time-lines show when specific processor elements are performing tasks identified by the annotations.

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Resulting processing time-lines.

The time-line on the left is a basic time-line with annotations identifying the operations. The time-line on the right over-lays communication events between processors for greater insight into the system's operation. We call the latter graph, a spider-web plot due to its appearance.