Try tweaking this sysctl: net.inet.tcp.recvspc

Give it sysctl -w net.inet.tcp.recvspace=262144 and run your tests.
Tweak it down from there.


On 2/12/08, "G|nter Zimmermann" <[EMAIL PROTECTED]> wrote:
> I have been using openbsd as router and firewall for several years without
problems to do routing between four networks (ethernet, ipv4) using 100 Mbit/s
nics. After upgrading network infrastructure to 1000Mbit/s the network
throughput is not as expected. I expected a throughput around 100 Mbyte/s and
got about 30 Mbyte/s(240Mbit/s) (ftp,ssh,nfs), netperf 550Mbit/s. My question
is now, whether harddisk and/or filesystem performance could have an impact on
the network throughput when pf is used for routing and firewall purposes. I
use intel pro server nics each on one PCI-E bus. The firewall system is a amd
dual core with 2 GB ram and one 80 GB SATAII harddisk.

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