[Xastir] Jerky Serial IO

[Greg Jurrens]

Curt:

Running DSL to 2 filtered feeds.
The Serial TNCS are
	1 on 144.39 for normal APRS
	1 on 145.79 for the Motorola Marathon

Last year, I actually ran 3 TNCs since we use a 2nd discrete channel for the race leader.

I checked interrupts etc.  Now for the 'good?' news.  I CVS'ed and re-compiled to 1.3.1.  I noticed during the compile things were extremely slow so I rebooted after the build.  All is well now.....I suspect I had a memory leak in something somewhere....gremlins.

Thanks for your interest.  I'll post how 3 tnc's work out.

73,
Greg

On Thu, 5 Feb 2004 10:06:44 -0800 (PST)
"Curt, WE7U" <archer at eskimo.com> wrote:

> On Wed, 4 Feb 2004, Greg Jurrens wrote:
> 
> > Is anyone having issues trying to run 2 or more TNCs at once on
> > Xastir?  I'm running a 10 day old CVS-Stable and just added a
> > second iGATE TNC for the Motorola Marathon channel.  I'm now
> > seeing a 'jerky' serial stream from ttyS0 and ttyS1.  It seems to
> > make a difference if I have the Internet interface turned on.  Off
> > makes things run smoother.  I usually connect to 2 APRS-IS
> > sockets.  If I have both active,  my serial stream can run 10's of
> > seconds lagging real time.
> 
> I wonder how many people are running 2 or more TNC's.  I would think
> that an unusual configuration.  I'm running one.
> 
> > PII-450
> > Fedora 1 Core
> > XASTIR 1.2.1 Late Jan04 STABLE
> > 2ea MFJ 1270B TNCs
> >
> > Ideas?  Suggestions?  The marathon is next weekend.
> 
> Are you running connected to a full feed?  Using a serial modem to
> connect to the internet?  I'm wondering about possible sharing of
> interrupts, interrupt latency, and how fast the internet data is
> pouring in.
> 
> Have you tried connecting to a filtered port instead, with a radius
> defined?  That'd really cut back on the amount of data coming in.
> 
> --
> Curt, WE7U			    archer at eskimo dot com
> Arlington, WA, USA		http://www.eskimo.com/~archer
> "Lotto:    A tax on people who are bad at math." -- unknown
> "Windows:  Microsoft's tax on computer illiterates." -- WE7U
> "The world DOES revolve around me:  I picked the coordinate system!"
> 
> 


-- 
Greg Jurrens - WD0ACD