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[aprssig] delayed packets.

Andrew P. andrewemt at hotmail.com
Mon Dec 3 21:07:33 UTC 2012


And, alas, another one: my YAAC program on any O/S when given a near-planetary-sized feed. The Java garbage collector can occasionally freeze the program for long intervals (10's of seconds) when cleaning up an extremely large memory heap (over 1 Gb).

But then, I never intended YAAC to be used for planetary-sized feeds (though I do test it there periodically to ensure some short-term performance flaw hasn't slipped in during development). Most people don't have high-enough-resolution screens to see local stations for the entire planet. ;-)

Andrew Pavlin, KA2DDO
author.of YAAC (Yet Another APRS Client)
http://sourceforge.net/projects/yetanotheraprsc
Sent from my Verizon Wireless BlackBerry

-----Original Message-----
From: J T <w0jrt at yahoo.com>
Date: Mon, 3 Dec 2012 20:57:23 
To: <aprssig at tapr.org>
Subject: Re: [aprssig] delayed packets.


Another one: Cheap USB/RS-232 converters.

--- On Mon, 12/3/12, Curt, WE7U <curt.we7u at gmail.com> wrote:

From: Curt, WE7U <curt.we7u at gmail.com>
Subject: Re: [aprssig] delayed packets.
To: "TAPR APRS Mailing List" <aprssig at tapr.org>
Date: Monday, December 3, 2012, 2:05 PM


On Mon, 3 Dec 2012, Jason KG4WSV wrote:

> On Mon, Dec 3, 2012 at 1:14 PM, J T <w0jrt at yahoo.com </mc/compose?to=w0jrt at yahoo.com> > wrote:
>
>> Don't forget, there are many other things that can cause the delayed
>> packet issue other than KPC-3 TNCs in KISS mode.
>
>
> Name one that you've actually seen. Even better, name one you've actually
> seen _twice_.

I'll give you two:

*) Windows boxes that are about ready to croak due to excessive memory or CPU being used.  They can slow down to a crawl sometimes and delay processing of packets as they're heading from TNC -> Inet.

*) Xastir way back when:  Reading in a log file used to send the packets out the igate port(s) as well.  Fixed in code at least a couple of years ago.

-- 
Curt, WE7U.        http://wetnet.net/~we7u <http://wetnet.net/%7Ewe7u> 
Closed-minded about open (-source)...

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