Comparison of the performance of skip lists and splay trees in classification of internet packets

• Published in: PeerJ. Computer science Vol. 5; p. e204
• Main Authors: Khezrian, Navid, Abbasi, Mahdi
• Format: Journal Article
• Language: English
• Published: United States PeerJ. Ltd 15.07.2019; PeerJ, Inc; PeerJ Inc
• Subjects: Algorithms; Algorithms and Analysis of Algorithms; Analysis; Applications programs; Applied research; Classification; Communications traffic; Computer engineering; Computer Networks and Communications; Data structures; Decision trees; Decomposition; Firewall; Firewalls (Data security); International conferences; Internet; Internet traffic; Memory; Methods; Network switching; Packet switching; Perforrmance; Skip list; Skip lists; Software; Splay tree; Taxonomy; Time; Iran; Splay tree; Time; Perforrmance; Memory; Firewall; Skip list
• ISSN: 2376-5992; 2376-5992
• DOI: 10.7717/peerj-cs.204

Due to the increasing number of Internet users and the volume of information exchanged by software applications, Internet packet traffic has increased significantly, which has highlighted the need to accelerate the processing required in network systems. Packet classification is one of the solutions implemented in network systems. The most important issue is to use an approach that can classify packets at the speed of the network and show optimum performance in terms of memory usage. In this study, we evaluated the performance in packet classification of two of the most important data structures used in decision trees, i.e. the skip list and splay tree. Our criteria for performance were the time of packet classification, the number of memory accesses, and memory usage of each event. These criteria were tested by the ACL and IPC rules with different numbers of rules as well as by different packet numbers. The results of the evaluation showed that the performance of skip lists is higher than that of splay trees. By increasing the number of classifying rules, both the difference in the speed of packet classification and the superiority of the performance of the skip list over that of the splay tree become more significant. The skip list also maintains its superiority over the splay tree in lower memory usage. The results of the experiments confirm the scalability of this method in comparison to the splay tree method.