R-Tile Avalon® Streaming Intel® FPGA IP for PCI Express* User Guide

ID 683501
Date 6/26/2023
Public

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5.2.3.8. Latency Tolerance Reporting (LTR)

This capability allows the R-Tile Avalon streaming IP, when operating in Endpoint mode, to report the delay that it can tolerate when requesting service from the Host. This information can help software optimize performance when the Endpoint needs a fast response, or optimize system power when a fast response is not necessary.

Table 97.  Latency Tolerance Reporting (LTR) Parameters
Parameter Value Default Value Description
PCIeN Enable LTR True/False False

Enable or disable LTR capability for PCIeN.

LTR is a new mechanism that enables Endpoints to send information about their latency requirements for memory read/writes and interrupts.