Intel® Arria® 10 Hard Processor System Technical Reference Manual

ID 683711
Date 1/10/2023
Public

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8.2.10. Functional Description of the Arbitration Logic

The interconnect arbitration logic handles situations in which multiple simultaneous packets need the same interconnect resource.

The system interconnect contains arbitration nodes at each point where multiple packets might demand the same resource. Each arriving packet has a priority. When multiple packets of different priorities arrive simultaneously at a node, the arbitration logic grants the resource to the highest-priority packet.

If there are simultaneous packets with the same priority, the uses a simple round-robin (least recently used) algorithm to select the packet.

Each packet's priority is determined by urgency, pressure, and hurry, as described in "QoS Mechanisms".