Big performance bump on VMware VMXNET3 virtual device
Today VMware dropped a whitepaper on the big bump in performance of the VMXNET3 virtual network device used in vSphere. It overs a significant performance increase over the previous version under several configurations and protocols. Along with the performance gains it reduces overhead on the CPU usuage.
Some highlights of this paper are:
(1) Throughput gains of up to 92% for 10G TCP/IPv4 Rx workloads with large socket buffer, which greatly improves bulk data transfer performance in a data center environment.
(2) Dramatic gains across all configurations of IPv6 traffic, with significant CPU usage reduction and throughput improvement over enhanced VMXNET2.