Large receive offload

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In computer networking, large receive offload is a technique for increasing inbound throughput of high-bandwidth network connections by reducing CPU overhead. It works by aggregating multiple incoming packets from a single stream into a larger buffer before they are passed higher up the networking stack, thus reducing the number of packets that have to be processed. In Linux, it is generally used in conjunction with the New API (NAPI) to also reduce the number of interrupts.

According to benchmarks, even implementing this technique entirely in software can increase network performance significantly.[1][2] As of April 2007, the Linux kernel supports LRO for TCP in software only.

[edit] References

  1. ^ Jonathan Corbet. "Large receive offload", LWN.net, 2007-08-01. Retrieved on 2007-08-22. 
  2. ^ Andrew Gallatin (2007-07-25). lro: Generic Large Receive Offload for TCP traffic. linux-kernel mailing list. Retrieved on 2007-08-22.

[edit] See also

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