Intel® Arria® 10 Hard Processor System Technical Reference Manual

ID 683711
Date 1/10/2023
Public

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8.2.11.3. QoS Generator Modes

Each QoS generator can operate in any of the following modes:

  • Limiter—Each initiator has a maximum bandwidth cap to prevent it from sending too many requests. When the cap is reached, the initiator stops accepting new requests.
  • Regulator—Each initiator has an ideal minimum bandwidth threshold. When the initiator's bandwidth usage drops below threshold, it raises the urgency for new transactions. Any pending transactions from that initiator are also expedited by the hurry mechanism.
  • Fixed—Each initiator assigns static urgency values to packets. The urgency value for read packets can be different from the value for write packets.

QoS generators can also be set to bypass mode. In this case, QoS signals are provided by the component connected to the master interface.

For the default QoS generator mode for each initiator, refer to "QoS Generators in the Interconnect Architecture".