On Sun, 15 Mar 2009, Kris Kennaway wrote:

    Kris reports that this leads to significant performance improvements
  in loopback benchmarking with TCP and UDP for throughput:
        RXCSUM  RXCSUM+TXCSUM
  TCP   15%     37%
  UDP   10%     74%

More like 24% instead of 74% actually, the sender and receiver had become unbalanced in that test.

That makes more sense -- I was surprised to see such a large win on UDP. Thanks for the update.

Robert N M Watson
Computer Laboratory
University of Cambridge
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