Methods and apparatus of time stamping for multi-lane protocols

摘要

One embodiment relates to a method of determining an arrival time of a data packet which has data striped across a plurality of lanes of a multi-lane link. Word arrival times for a subset of the words of the data packet are determined, each word arrival time corresponding to an arrival time of a word of the data packet at an individual lane of the multi-lane link. The arrival time of the data packet is determined using the word arrival times for the subset of words. Another embodiment relates to a method of determining an arrival time of a data packet which uses a measure of average fullness for a set of the FIFO buffers. Other embodiments and features are also disclosed.

主权项

1. A method of determining an arrival time of a data packet which has data striped across a plurality of lanes of a multi-lane link, the method comprising:
receiving words of the data packet on the plurality of lanes of the multi-lane link; determining word arrival times for a subset of the words of the data packet, each word arrival time corresponding to an arrival time of a word of the data packet at an individual lane of the multi-lane link; and determining the arrival time of the data packet using the word arrival times for the subset of the words, wherein the subset of the words consists of a first-to-arrive word and a last-to-arrive word.