5.5. Batching Network Packets
5.5. Batching Network Packets In configurations with a long transmission path, batching packets before submitting them to the kernel may improve cache utilization. To configure the maximum number of packets that can be batched where N is the maximum number of packets to batch: To provide support for tun / tap rx batching for type='bridge' or type='network' interfaces, add a snippet similar to the following to the domain XML file.
ethtool -C USDtap rx-frames N <devices> <interface type='network'> <source network='default'/> <target dev='vnet0'/> <coalesce> <rx> <frames max='7'/> </rx> </coalesce> </interface> </devices>