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Getting notified in user-space on interrupts

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# 1  
Old 06-27-2010
Getting notified in user-space on interrupts
Hi,
I'm working on an AMD opteron running Linux 2.6.28.6
I want to preload a module specific register (MSR) with a value to have it overflow after a number of a specific event counts. As I understand, when the counter in the register overflows, an interrupt will be generated and handled by the appropriate interrupt handler. How can my user-level application get notified whenever the interrupt occurs? I want to know the instruction that caused the overflow. Is this possible?
I think this is different than responding to signals with sigaction(). I never dealt with interrupts before, so any help is appreciated.

Thanks
# 2  
Old 06-27-2010
Do you mean Model Specific Register?
# 3  
Old 06-27-2010
Yes. Sorry for the conceptual typo Smilie
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