Simplify Packet Processing Design with P4 and Vivado Tools (WP555)

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Designs can be deployed with multiple instances in parallel and multiple instances in series to support capabilities such as multi-level parsing and multi-data-pipeline systems. The flexible user metadata structure allows information to be passed between P4 instances to support this. There are several reasons to do this:

  • To achieve higher total line rate processing or total packet rate
  • To optimize more complex parts of the design that do not require high data rates or increased packet rates
  • To create a more modular system, restricting the size of each P4 program. Modularity is also a re-use benefit.
Figure 1. Multi-stage Ingress and Egress Pipelines

Figure 2. 4x100G Pipelines