Re: debugging tools under 2.2.18 with RTL 3.0 pre10 patch

Re: debugging tools under 2.2.18 with RTL 3.0 pre10 patch

[Matthieu Fleurmont]

Where are not handling IO from user space but we are synchronizing those
materials with a kind of automation...
And all our tasks ( video capture and analysis, commands and data from and
to VTR and Video server, GUI refresh and more ) should be done within 20 ms,
that is why we needed and installed RTL.

I should have precised that obviously all of our code is not in the kernel.

And not to be insulting : what an useful answer U made ... ;op
However thank you for having began this thread...

Best regards
Matthieu
----- Original Message -----
From: "Mark Hahn" <hahn@physics.mcmaster.ca>
To: "Matthieu Fleurmont" <mfleurmont@ina.fr>
Sent: Wednesday, October 31, 2001 12:52 AM
Subject: Re: debugging tools under 2.2.18 with RTL 3.0 pre10 patch


> > We are developping a few kernel modules handling serial ports in order
to have a
> > real time control on professional video systems as VTR, video servers
and more
> > ...
>
> realtime IO from user-space is not hard.
>
> > I am looking for a way that would allow me to have a kind of core dump
instead
> > of of freezing and rebooting my box when my code is wrong and the module
not
> > working properly...
> >
> > Thanks to any one who already solved this problem and would share its
experience
> > with me.
>
> not to be insulting, but crashing is exactly why any code that
> doesn't absolutely have to be in the kernel, shouldn't be in the kernel...
>

debugging tools under 2.2.18 with RTL 3.0 pre10 patch

[Matthieu Fleurmont]

Hello,

We are developping a few kernel modules handling serial ports in order to have a
real time control on professional video systems as VTR, video servers and more
...

I am looking for a way that would allow me to have a kind of core dump instead
of of freezing and rebooting my box when my code is wrong and the module not
working properly...

Thanks to any one who already solved this problem and would share its experience
with me.

Best regards

Matthieu

----- Original Message -----
From: "David Lang" <david.lang@digitalinsight.com>
To: <linux-kernel@vger.kernel.org>
Sent: Tuesday, October 30, 2001 2:04 PM
Subject: ipchains redirect failing in 2.4.5


> I am attempting to track down a problem I have run into with 2.4.5
>
> I have a firewall that has proxies listening on ports 1433-1437. If I
> connect to these proxies on these ports I have no problems, however if I
> put in an ipchains rule to redirect port 1433 on a second IP address to
> port 1436 (for example) and then hammer the box with ab -n 500 -s 20 the
> first 20 or so connections get through and then the rest timeout. doing
> repeated netstat -an on the firewall during this process shows an inital
> burst of 15 connections that get established, a pause, and then a handfull
> more get established, followed by those 20 connections being in TIME_WAIT
>
> again, connection to the same IP address on the real port the proxy is
> listening on has no problems, it's only when going through the redirect
> that it fails.
>
> any suggestions, tuning paramaters I missed, or tests I need to run to
> track this down?
>
> David Lang
> -
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