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Re: Serious TCP performance regression in 4.0?

> > I have recently been made aware of what appears to be a serious
> > TCP bulk data transfer performance regression experienced by
> > NetBSD 4.0.
> Does setting net.inet.tcp.congctl.selected=reno (default is newreno)
> make a difference?

Nope, it didn't.

However, I may have to retract my claim, the problem appears to
be specific to the "iperf" program.  Re-doing some of the tests
with good old ttcp does not show the same behaviour.

It would still be interesting to know what "iperf" does to
trigger the problem in 4.0, but the solution to that is now not


- Håvard

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