[nos-bbs] Jnos under Raspberry Pi keeps crashing

[jerome schatten]

Thanks for the suggestion Bob re: the debugger. I see that gdb is
present on the pi and also, I've located Maiko's instructions for using
it. I've never used it before, so this will be breaking new ground for
me <g>.

I didn't think of looking at syslog, I just did a quick look, and I see
that there is lots of info there around the crash, hopefully I'll be
able to make use of it upon detailed inspection.

New tools for an old man.
Thanks,
jerome 


On Wed, 2013-02-13 at 21:06 -0500, Bob Tenty wrote:
> I think there is also a lot of swapping to flash as the RAM
> in the PI is max 512 MB.
> You can see that with "top" from the linux shell.
> 
> You can also run an debugger on jnos as that tells you were it is
> crashing in jnos.
> 
> 73,
> 
> Bob VE3TOK
> 
> 
> >Nothing in syslog of the PI itself?
> 
> >Bob VE3TOK
> 
> 
> On 13-02-13 07:05 PM, jerome schatten wrote:
> > Hi...  I've been working on this for over a month, and I have finally
> > run out of things to try, so I need some help.
> >
> > The Problem:
> >
> > I have compiled from source (all defaults), various versions of Jnos for
> > the RP and they all compile without error (lot's of warnings, but no
> > fatal errors) and each produces a working executable. All jnos functions
> > seem to work, but after anywhere from a few minutes to a few hours (and
> > sometimes several days), Jnos crashes back to the operating system. It
> > never hangs the pi, it just unceremoniously exits.
> >
> >
> > In an effort to bisect the problem (hardware vs. software), here's what
> > I've tried:
> >
> > 1. Power supplies, various: from a 5v/1A wall wart to a lab-grade
> > regulated supply connected to the GPIO 5v pins; no difference.
> >
> > 2.  Burn a new SD card (tried various brands); no difference.
> >
> > 3.  Examined the jnos logs to see if there was a pattern to the
> > activities before the crash. Results don't seem to indicate anything
> > obvious. The actual crash could be many minutes after a logged event. Of
> > course not all events are logged, so that fact that all Mailbox activity
> > shows up a lot before a crash, can't be pinned to anything. That said,
> > there's one command that kicks jnos right out to the OS pronto and that
> > is 'mbox kick'. Bang jnos quits. Maybe this is the big clue?
> >
> > 4. apt-get update -> apt-get upgrade; then recompile and try new binary;
> > no difference.
> >
> > 5. download latest image, burn new card and repeat 4 above; no
> > difference
> >
> > 6. Remove USB peripherals one by one and rebooting; no difference.
> >
> > 7. Move jnos from SD card to memory stick; no difference.
> >
> > 8. Run in GUI terminal/Run without GUI in linux terminal; no difference.
> >
> >
> > What I have not tried:
> >
> > 1. I have not swapped out the pi
> >
> > 2. I have not run any memory (ram) diagnostics as I can't find any to
> > run.
> >
> >
> > In conclusion, I have no indication from running different apps on the
> > pi, that the pi is faulty -- no flakyness at all, except when running
> > jnos. Of course I don't have any apps that continually exercise the pi
> > the way jnos does. If you know of any I could try, please let me know. 
> >
> > As well, is there anything I can try to change in the compilation
> > process that might be useful?
> >
> > Thanks for any suggestions!
> > Jerome - ve7ass
> >
> >
> >
> >
> >
> >
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