Enabling LRO

Principles

Large Receive Offload (LRO) aggregates multiple received TCP data packets into a large data packet and transmits it to the network protocol stack for processing. This reduces the processing overhead of the upper-layer protocol stack and improves the system capability of receiving TCP data packets.

This feature is especially obvious when a large number of small-packet network I/Os exist.

Modification Method

Run the following command to check whether the NIC LRO function is enabled:

1	# ethtool -k $eth

Run the following command to enable the NIC LRO function:

1	# ethtool -K $eth lro on

After LRO is enabled, the delay of a single data packet increases. Therefore, you can determine whether to enable LRO based on service requirements.

Parent topic: Optimization Methods