Subject: Re: Bad performance of bmac (bm0) interface (Rev.1 b&w G3) with 100baseTX?
To: Joachim Thiemann <joachim.thiemann@gmail.com>
From: Andrew Gillham <gillham@gmail.com>
List: port-macppc
Date: 03/08/2006 22:05:13
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Yes, I have this exact problem. I seem to remember someone suggesting it
was related to the back to back packet rate. (with outbound much faster tha=
n
inbound)
I've not found a solution and I don't use the B&W enough to be too concerne=
d
about 10 meg only. Note that I have it plugged into an auto negotiating
switch port, so I only set it to 10baseT, which gets me 10/half with the
switch. At least that way the switch & Mac are using the same settings and
when I boot into MacOSX it just works at 100/full via auto negotiation.
-Andrew
On 3/3/06, Joachim Thiemann <joachim.thiemann@gmail.com> wrote:
>
> Hello,
>
> so I have my old Rev.1 b&w G3 working relatively nicely, thanks to
> some tips from people here. I have now set it up to be a dovecot mail
> server, update dyndns, and act as an ftp, netatalk and samba server.
>
> I now noticed some performance issues: from other Macs (PB G4) writing
> to the server is absolutely abysmal in speed - using afp, smb, or ftp.
> We're talking in the order of 20kb/s.
>
> While I originally suspected the problem being with the daemon
> processes, I played with the bm0 media settings and noted that I get
> much better performance when setting the interface down to 10baseT
> (using ifconfig bm0 media 10baseT mediaopt full-duplex), in the order
> of 200kb/s using ftp.
>
> Has anyone else seen this type of problem? Is it a buffer overrun
> problem in the bmac driver? Any way I can get full performance using
> 100baseTX?
>
> Thanks,
> Joe.
>
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Yes, I have this exact problem. I seem to remember someone suggesting=
it was related to the back to back packet rate. (with outbound much faster=
than inbound)<br><br>I've not found a solution and I don't use the B&W=
enough to be too concerned about 10 meg only. Note that I have it pl=
ugged into an auto negotiating switch port, so I only set it to 10baseT, wh=
ich gets me 10/half with the switch. At least that way the switch &am=
p; Mac are using the same settings and when I boot into MacOSX it just work=
s at 100/full via auto negotiation.
<br><br>-Andrew<br><br><div><span class=3D"gmail_quote">On 3/3/06, <b class=
=3D"gmail_sendername">Joachim Thiemann</b> <<a href=3D"mailto:joachim.th=
iemann@gmail.com">joachim.thiemann@gmail.com</a>> wrote:</span><blockquo=
te class=3D"gmail_quote" style=3D"border-left: 1px solid rgb(204, 204, 204)=
; margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hello,<br><br>so I have my old Rev.1 b&w G3 working relatively nicely, =
thanks to<br>some tips from people here. I have now set it up to=
be a dovecot mail<br>server, update dyndns, and act as an ftp, netatalk an=
d samba server.
<br><br>I now noticed some performance issues: from other Macs (PB G4) writ=
ing<br>to the server is absolutely abysmal in speed - using afp, smb, or ft=
p.<br> We're talking in the order of 20kb/s.<br><br>While I originally susp=
ected the problem being with the daemon
<br>processes, I played with the bm0 media settings and noted that I get<br=
>much better performance when setting the interface down to 10baseT<br>(usi=
ng ifconfig bm0 media 10baseT mediaopt full-duplex), in the order<br>of 200=
kb/s using ftp.
<br><br>Has anyone else seen this type of problem? Is it a buffe=
r overrun<br>problem in the bmac driver? Any way I can get full performance=
using<br>100baseTX?<br><br>Thanks,<br>Joe.<br></blockquote></div><br>
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