High Bandwidth Memory (HBM2E) Interface Agilex™ 7 M-Series FPGA IP User Guide

ID 773264
Date 11/04/2024
Public
Document Table of Contents

6.1.3. High Bandwidth Memory (HBM2E) Interface FPGA IP Latency

Read latency includes the controller command path latency to issue the read command to the HBM2E memory, memory read latency, and the delay in the read data path through the HBM2E memory controller. Command and data transfer via the hard memory NoC incur additional latency that is dependent on the relative position of NoC initiator and target. The effects of hard memory NoC latency are not reflected in simulation because they are placement-dependent

To monitor the read and write latency for the HBM2E interface, you should use the Performance Monitor FPGA IP. The Performance Monitor allows you to measure performance on an AXI4 mainband interface of the HBM2E pseudo-channel.

For information on enabling the Performance Monitor, refer to Enabling and Using the HBM2E Design Example with the Performance Monitor in the High Bandwidth Memory (HBM2E) Interface Agilex™ 7 M-Series FPGA IP Design Example User Guide.