From: Benjamin Herrenschmidt <bh40@calva.net>
To: "David A. Gatwood" <dgatwood@deepspace.mklinux.org>,
linuxppc-dev@lists.linuxppc.org
Subject: Re: Problems with Ethernet on PowerBook Wallstreet G3
Date: Wed, 12 Apr 2000 14:44:23 +0200 [thread overview]
Message-ID: <20000412144423.023044@mailhost.mipsys.com> (raw)
In-Reply-To: <Pine.LNX.3.96.1000411215343.219D-100000@deepspace.mklinux.org>
On Tue, Apr 11, 2000, David A. Gatwood <dgatwood@deepspace.mklinux.org> wrote:
>> * Ethernet is extremely slow when SENDING data. While incoming FTP
>> traffic reaches 800...900 kB/s (which seems ok on a 10 mbps
>> network), outgoing traffic makes only 40...50 kB/s.
>
>Interesting. The MkLinux driver exhibits the same symptoms. Hmm... I
>wonder.... Do a side by side code comparison, and they're basically the
>same driver... *coughs* You might want to have a look at Darwin's
>drivers and see if they shed any light on this. Unless of course, that's
>just another clone.... I won't even ask....
>
>There are apparently occasional issues of outgoing packets getting hosed.
>Probably a DMA bug somewhere, if I were guessing, but.... I seem to
>recall the data being off by a byte in one direction or the other (i.e. a
>byte getting dropped or added), but I could be remembering wrong. It has
>been a very long time since I heard anyone mention this bug -- as in two
>years, at least.
The Darwin bmac driver contains interesting comments about chip bugs that
cause Tx packets to get corrupted in some conditions (and possibly other
issues). I didn't have time to look more closely, but for those
interested, the new kernel in Darwin CVS is the module System/xnu (not
System/kernel, this is the old kernel).
Ben.
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next parent reply other threads:[~2000-04-12 12:44 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.3.96.1000411215343.219D-100000@deepspace.mklinux.org>
2000-04-12 12:44 ` Benjamin Herrenschmidt [this message]
[not found] <38F5A91D.1212ECEC@drea.dnd.ca>
2000-04-13 12:23 ` Problems with Ethernet on PowerBook Wallstreet G3 Wolfgang Denk
[not found] <Pine.LNX.4.10.10004130948140.10131-100000@opal.biophys.uni-duesseldorf.de>
2000-04-13 9:39 ` Wolfgang Denk
[not found] ` <38F5B1C0.FC8863EB@drea.dnd.ca>
2000-04-13 12:57 ` Joseph Garcia
2000-04-13 13:59 ` Benjamin Herrenschmidt
2000-04-13 16:47 ` David A. Gatwood
2000-04-12 22:45 Wolfgang Denk
[not found] <Pine.LNX.3.96.1000412105423.25261A-100000@deepspace.mklinux.org>
2000-04-12 18:10 ` Joseph Garcia
2000-04-12 18:55 ` David A. Gatwood
2000-04-12 22:18 ` Wolfgang Denk
2000-04-12 18:25 ` Benjamin Herrenschmidt
2000-04-12 20:06 ` Michael Schmitz
-- strict thread matches above, loose matches on Subject: below --
2000-04-11 18:22 Wolfgang Denk
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