--- On Sat, 2/6/10, Kenneth R Westerback <kwesterb...@rogers.com> wrote:
> From: Kenneth R Westerback <kwesterb...@rogers.com> > Subject: Re: Download rate and sysctl settings > To: "Sebastiano Pomata" <sebastianopom...@tiscali.it> > Cc: misc@openbsd.org > Received: Saturday, February 6, 2010, 11:33 AM > On Sat, Feb 06, 2010 at 04:09:08PM > +0100, Sebastiano Pomata wrote: > > Il 06/02/10 15:12, Claudio Jeker ha scritto: > > > On Sat, Feb 06, 2010 at 01:27:12PM +0100, > Sebastiano Pomata wrote: > > >> Il 06/02/10 03:55, Stuart Henderson ha > scritto: > > >>>> I really can understand this, for the > sake of system portability and so > > >>>> on. Anyway, I really hardly > understand why, without touching any of the > > >>>> default settings, download rate from > every server would never overcome > > >>>> the value of 400 kB/s. Is it all due > to the tcp windows size? > > >>> > > >>> Yes. > > >>> > > >> > > >> 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? > > Optimally you now need to check what the switch port is > configured/negotiated to. e.g. if it has ended up in > 10/half you > have a problem. Ditto for the connections for the other > device. > > If you have no access to the switch you can try every > manual media > setting to force your OpenBSD boxen to the different > possibilities > and see if any work better. > > .... Ken > Have you tried another network card, like an Intel (em) based card? The Realtek cards have, at least in the past, been poor performers for me. __________________________________________________________________ The new Internet Explorer. 8 - Faster, safer, easier. Optimized for Yahoo! Get it Now for Free! at http://downloads.yahoo.com/ca/internetexplorer/
