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I am tuning a server that needs to handle small (average of about 50 bytes) UDP packets. The average packet rate is approximately 100,000 packets/second. The data is very burst and can sometimes burst to 5x the mean packet rate.

What settings should I tune to ensure that I:

  1. Minimize packet loss
  2. Minimize kernel to user land latency
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Trading system, right? There are some options. Can you provide details on the hardware specifications? – ewwhite Sep 22 '11 at 21:15

There is little to do about this: install rt patch, have a nic that support polling, remove iptables rules. But a better ideea is to upgrade the hw; for a "mission critical" router, just buy a fast machine.

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