En/na Henry Vermaak ha escrit:
2009/11/30 Luca Olivetti <[email protected]>:
An update: the program has been running for almost two weeks now (actually
13 days) and I deployed it at the customer's site (crossing fingers).
This threw me into paranoia mode (I made a small modification to another
project and I used the original fpc version to avoid this kind of problems),
so I'd appreciate if anyone could give me some pointers on how to debug this
on a virtual machine (what I found with google involves recompiling the
kernel with debug support and using a special pci card to generate a NMI
when the kernel gets stuck).
The best way to do this is probably with netconsole. This gets your
kernel to spit out the printk messages over the network so you can use
netcat on another machine to see the latest messages before the kernel
hangs. I don't know if there's a problem with doing this on a virtual
machine. Google around or read the kernel docs to see how this works.
Just speculating at this point, but if it simply hangs (e.g. stuck in a
tight loop with interrupts disabled) it will be of no use.
With my previous tests on real hardware I could see no messages neither
on the console nor on a remote ssh session.
I though that, maybe, using a virtual machine, I could examine the
status of the guest, but I could not find anything in virtualbox
documentation.
Bye
--
Luca Olivetti
Wetron Automatización S.A. http://www.wetron.es/
Tel. +34 93 5883004 (Ext.133) Fax +34 93 5883007
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