Intel® Quartus® Prime Pro Edition User Guide: Platform Designer

ID 683609
Date 9/26/2022
Public

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5.5.3.2. Changing the Response Buffer Depth

When you use automatic clock-crossing adapters, Platform Designer determines the required depth of FIFO buffering based on the agent properties. If an agent has a high Maximum Pending Reads parameter, the resulting deep response buffer FIFO that Platform Designer inserts between the host and agent can consume a lot of device resources. To control the response FIFO depth, you can use a clock crossing bridge and manually adjust its FIFO depth to trade off throughput with smaller memory utilization.

For example, if you have hosts that cannot saturate the agent, you do not need response buffering. Using a bridge reduces the FIFO memory depth and reduces the Maximum Pending Reads available from the agent.