Detecting buffer space with UDP.

[David Gilbert]

I'm using kqueue() with a EVFILT_WRITE to send udp packets over a
gigabit interface (the job here is to stress test DNS servers).  I'd
like to send packets at wire rates, but somehow the EVFILT_WRITE is
always triggered and I'm dropping a lot of packets on the floor.

Is there a way (preferably with kqueue()) to wait on the bandwidth
available on the card?

Dave.

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|David Gilbert, Independent Contractor.       | Two things can be          |
|Mail:       dave at daveg.ca                    |  equal if and only if they |
|http://daveg.ca                              |   are precisely opposite.  |
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