Home > Communication Service Provider Solutions > Telecom Multicloud Foundation > Red Hat > Guides > Red Hat Open Stack Platform Guides > Jumbo frames Performance Analysis Over Red Hat OpenStack 16.1 Infrastructure > Summary and conclusion
A good understanding of the underlying infrastructure for any cloud deployment is critical to learning how its network(s) work to identify and eliminate possible bottlenecks for reliant and optimal performance. The objective of this paper was to identify and eliminate the causes of packet drops for jumbo frames. A set of key considerations that enhances performance for jumbo frame are highlighted as best practices. The tunings applied through various parameters resulted in ZPL throughput to reach 100% line rate. The optimizations are recommended to be accounted for to get maximum network performance.
Generally, standard Ethernet frames are used for network traffic over the cloud environments. However, in performance specific use-cases jumbo frames are required to enhance payload capacity by reducing the overheads and CPU cycles for packet processing, thus efficiently utilizing the given bandwidth channel.
The occurrence of packet drops for jumbo frames in the RHOSP 16.1 couldn’t achieve ZPL at 100% line rate. The issue was reproduced in a standalone KVM based environment with different variations in test environment. The variations such as Tx and Rx queues, single OVS bridge, dual OVS bridges, VLAN transitions and bonding were implemented both in isolation and combinations with other parameters. Every variation improved performance but scaling the Rx queues was major optimization that eliminated packet drops increasing ZPL throughput to reach 100% line rate.
This paper summarizes key learnings that took a lot of time and effort and we hope that this paper is helpful for tuning the network performance of your infrastructure. Please refer to Appendix C for details of implementation with respect to manual and JetPack[6] powered OpenStack deployment methods separately for general performance practice undertaken for jumbo frames. We encourage you to implement the list of best practices presented here to get the maximum performance for jumbo frames.
Lastly, this paper confirmed that recommendations for best practices from Red Hat are vital to achieve optimal performance for all packet sizes including jumbo frames over OpenStack environment.