Improving of TCP performance of embedded network devices

Abstract

This article deals with TCP optimization and performance improvement issues for low-power embedded devices. One of the ways to increase TCP performance in the high-speed networks or low-power devices is to reduce the number of TCP ACK messages generated or received by the system. It has been shown that the TCP congestion window and acknowledgment mechanism are dependent processes with common variables. Therefore, the growth of network bandwidth is coherent with the ACK rate. When the network capacity is increasing, the ACK rate on the channel is increasing as well. This leads to network equipment CPU performance degradation. To resolve this flaw, the ACK rate limiting has been proposed and implemented in the Linux kernel stack.