Application consumes close to 100% of CPU, how to profile and determine the cause

Hello,

I recently wrote an application that is used for testing units in a
burn-in chamber. It uses two external library that require the use of
P\Invoke in order to work with them. There is a primary thread and a
secondary polling thread. Every once in a while the process will
consume close to 100% of the CPU, but I am unclear why. I am wondering
how would I go about determine the cause of the problem? What sort of
tools or instrumentation should I use in order to determine what part
of the code is causing the problem. Any help is greatly appreciated.

I know in the hardware world I could implement a watchdog to restart
the sytem, would something like that be useful? I would have to keep
track of the system thus is would run slower and consume more
resources, but I might be able to recover when the process has
problems???

Mark

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