Hi !

I have a 3COM 3c509 PnP in 2 machines, and on the driver disk there is a
small program named "3c5c9cfg.exe". I can choose the buffer optimization
with it. Examples :

    ep0 at isapnp0 port 0x210/16 irq 9
    ep0: 3Com 3C509B EtherLink III
    ep0: MAC address 00:60:08:e7:b7:47

With buffer set to "DOS" or "Windows / OS 2", I get :
    ep0: 8KB byte-wide FIFO, 5:3 Rx:Tx split, utp/bnc (default bnc)

and with buffer set to "Server" :
    ep0: 8KB byte-wide FIFO, 1:1 Rx:Tx split, utp/bnc (default bnc)

Cards work fine with "DOS" setting, but I have really heavy "hang" time with
Telnet from a Windows NT4 WS (like 1 minute to display the first "more" or
"dmesg", or to login). Transfert rate is OK when FTPing.


-----Message d'origine-----
De : Manuel Bouyer <bouyer@antioche.lip6.fr>
À : Jukka Marin <jmarin@pyy.jmp.fi>
Date : samedi 24 octobre 1998 20:44
Objet : Re: Why is Samba so much slower on NetBSD than FreeBSD?


>On Oct 23, Jukka Marin wrote
>> On Fri, Oct 23, 1998 at 09:56:32AM -0700, Jonathan Stone wrote:
>> > but logging the printf, on general principles, could well cause yet
>> > more overflows.  Maybe tuning the card's interrupt hysteresis could
>> > reduce the overruns?
>> How big is the buffer RAM on that card?  Some cards only have room for
>> one incoming packet.. nothing to tune there :-(
>The cards I have have a 2k receive fifo. So it's one ethernet packet +
>a bit more ...