Patent ID: 8130649
Filing Date: 2012-03-06
Classification: H04L

Abstract:
1. A method of performing flow control on a flow of data packets for transmission over a serial link, the method comprising the steps of: a) receiving, at a traffic control system, from a downstream data processing unit, a backpressure message having contents that indicate the fill level state of each of a plurality of receive queues in the downstream data processing unit coupled to the serial link for receiving the data packets, wherein each of the receive queues corresponds to a respective type of data packet traffic; b) determining a set of weighting factors from the backpressure message by reading the weighting factors from a mapping of various backpressure message contents to sets of weighting factors, wherein each weighting factor corresponds to a respective type of data packet traffic; and c) adjusting an amount of rate limiting applied to data packets from an ingress buffer associated with a respective type of data packet by a respective weighting factor of the determined set of weighting factors.