TCP/IP hang

[Robert G. Brown]

On Tue, 28 Jul 1998, Maximilian Rixius wrote:

> Hi,
> 
> I've got a problem with two intel DK440LX boards (i82557 chips) running
> under stress tests. With the v0.99B driver the network connection will
> not hang up completely (as it did some versions before), but after an
> transmit timeout the network performance test's TCP/IP connection seems
> to be unrecoverably stuck with netstat reporting different states on
> both ends. This results in
> 
> - test stuck with bw_tcp of the lmbench suite or
> - test program dies with netperf (client side only).
> 

The patch at:

www.phy.duke.edu/brahma/eepro100.c-0.99B.patch

has reportedly cured the problem for three people now.  Please report
back to the list if it works for you so Don can incorporate the patch
(or a new and improved version of the same thing:-) in his latest
release version.

Be sure if you compile the driver as a module and insert it by hand
that you used -D__SMP__ on the compile line.

   rgb

> This happens after several hours (e.g. eight) of continued testing.
> Afterwards both previously established (but at the time unused)
> connections as well as establishing new connections is no problem.
> 
> Could this result from a driver problem or is it more likely to be a
> TCP/IP problem?
> 
> The enviroment: 2x DK440LX with dual PentiumII 333MHz, 128/256MB,
> Linux 2.0.33 with eepro100 v0.99B (testing v0.99C right now).
> Additionally to ethernet performance testing, hard disk tests are run at
> the same time. One of the nodes bootes with root as NFS.
> 
> Spuriously there are "eth0:SMP simulaneus entry of interrupt handler" in
> the logfile, but this does not seem to produce trouble.
> 
> Hope somebody can help,
> 
>   Maxi
> 
> --------------------------------------------------------------
> Maximilian Rixius                             maxi@parsytec.de
> parsytec Gmbh                   private:  maxl@pinguin.oche.de
> 
>           I'm the fellow throwing peas into the air
> --------------------------------------------------------------
> 

Robert G. Brown	                       http://www.phy.duke.edu/~rgb/
Duke University Dept. of Physics, Box 90305
Durham, N.C. 27708-0305
Phone: 1-919-660-2567  Fax: 919-660-2525     email:rgb@phy.duke.edu