On Sat, 6 Feb 2010 19:43:54 +0100
Claudio Jeker <cjeker@diehard.n-r-g.com> wrote:

quoted text
> > >> Thank you for the clear answer. Anyway, trying to act on
> > >> tcp.sendspace isn't affecting the upload capabilities of my
> > >> OpenBSD server. I tried downloading a file through httpd, via
> > >> ftp but results are still disappointing: 60-70 kbps between two
> > >> boxes on the same switch.
> > >>
> > >> The box is going to become a webserver, could you please give me
> > >> more hints about tuning network performance?
> > >>
> > > 
> > > Check your links. This sounds like a full-duplex issue between
> > > switch and machines. On a LAN even with default tcp
> > > send/recvspace you should get easily get up to 200Mbps.
> > > 
> > 
> > Just logged through ssh on the server, ifconfig reports:
> > 
> > re0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
> >         lladdr 00:b0:c2:02:5e:a0
> >         priority: 0
> >         groups: egress
> >         media: Ethernet autoselect (100baseTX
> > full-duplex,rxpause,txpause) status: active
> >         inet 192.167.132.99 netmask 0xffffff00 broadcast
> > 192.167.132.255 inet6 fe80::2b0:c2ff:fe02:5ea0%re0 prefixlen 64
> > scopeid 0x2
> > 
> > As from the name, nic is a common Realtek card (OpenBSD just got it
> > without need of doing anything). So I suppose nic is running in full
> > duplex.
> > Hints?
> > 
> 
> Check interface statistics on interface and switch, look for excessive
> errors or collisions. Both should not happen on a full-duplex link.
> 
> 

Back in the office, I made a simple test: using the integrated card
(bge) and not the realtek one (re), I now get almost full speed from
the server (8-9 MBps).
Are there some issues with that driver?
ifconfig even reported it was going 100Base TX.

Extract from dmesg:
re0 at pci5 dev 0 function 0 "Realtek 8169" rev 0x10: RTL8169/8110SB
(0x1000), a pic 4 int 21 (irq 11), address 00:b0:c2:02:5e:a0
rgephy0 at re0 phy 7: RTL8169S/8110S PHY, rev. 3