[lkml]   [2001]   [May]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: Xircom RealPort versus 3COM 3C3FEM656C
On Tue, 22 May 2001 20:10:41 +0100 (BST), Alan Cox <> wrote:

> Before you give up on the xircom thing, try the -ac kernel and set the box
> up to use xircom_cb not xircom_tulip_cb
> That might help a lot

It doesn't, it still performs poorly with any of the three available
drivers -- xircom_cb, xircom_tulip_cb, and tulip_cb (from the pcmcia package):

* Rx gets only about 1.8Mbit/s on a 100Base-TX network with any of the three
* Tx gets 80+Mb/s with xircom_tulip_cb and tulip_cb, and less than 30Mb/s
with xircom_cb.

And no, promisc mode played no role in this experiment, because my test
network is switched and otherwise very quiet.

Windows drivers handle both Rx and Tx at full speed.

I have this feeling that we're handling the card in some (tulip) compat
mode, which severely cripples performance. It's hard to tell, without


It is better to keep your mouth shut and be thought a fool,
than to open it and remove all doubt.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 12:53    [W:0.037 / U:0.056 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site