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On Apr 27, 2012, at 11:10 AM, Petar Bogdanovic wrote:
> I'm trying to figure out, why two nearly identical netbsd-6 hosts have
> troubles using hpn. They are connected through a 5000 Kb/s link and the
> following (not very scientific) test:
> dd if=FILE bs=1m count=2 | ssh HOST dd bs=64k of=/dev/null
> yields different results when defaults are in place (430KB/s) and when
> HPNDisabled=yes and/or HPNBufferSize=2048 (590KB/s).
You need to increase the TCP window size to take significant advantage
of the SSH HPN changes. Take a look at the following sysctls:
You'll also need to increase NMBCLUSTERS, unless that has become
a sysctl tunable as well...
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