tcp_output starving -- is due to mbuf get delay?

Jeffrey Hsu hsu at
Wed Apr 9 17:28:28 PDT 2003

  > I have change NMBCLUSTER from 2446 to 6566 to 10240,
  > and nothing is improved.

What does netstat -m say?

  > Is there any way to make MGET/MCLGET not to wait?

You could try changing the M_WAIT to M_NOWAIT.

Finally, I hope you're running FreeBSD 4.8, because the 5.x series
is known to be much slower.


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