Keysight Technologies, Inc.
METHODS, SYSTEMS, AND COMPUTER READABLE MEDIA FOR MEASURING DELIVERY LATENCY IN A FRAME-PREEPMTION-CAPABLE NETWORK

Abstract:

Methods, systems, and computer readable media for measuring preempted frame delivery latency in a frame-preemption-capable network are disclosed. One method includes, in a network test tool including at least one processor, simulating frame preemption by generating a plurality of simulated preempted frame fragments of a simulated preempted frame and an express frame. The method further includes inserting a last fragment generation timestamp in a last fragment of the simulated preempted frame fragments, wherein inserting the last fragment generation timestamp in a last fragment of the simulated preempted frame fragments includes inserting the last fragment generation timestamp in a portion of the last fragment that will remain in a last fragment of a refragmentation of the simulated preempted frame in the event that the simulated preempted frame is reassembled and refragmented. The method further includes transmitting the simulated preempted frame fragments and the express frame to a device under test (DUT). The method further includes receiving frame fragments including a frame or frame fragment including the last fragment generation timestamp. The method further includes calculating, using the last fragment generation timestamp, delivery latency of the simulated preempted frame generated by the test tool.