2.5.1 Architectural QoS support

The CHI architecture specifies that all message flits include a 4-bit QoS Priority Value (QPV).

The QPV of the originating message must propagate through all messages in a transaction. The QPV is defined as higher values being higher priority and lower values being lower priority. All CCN-502 components use the QPV to provide prioritized arbitration and to prevent head-of-line-blocking based on the QPV.

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