Il 06/02/10 15:12, Claudio Jeker ha scritto:
quoted text
> 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?