Performance counter and NMI handling

Udo A. Steinberg us15 at os.inf.tu-dresden.de
Wed Nov 15 07:59:33 CET 2006


On Wed, 15 Nov 2006 15:25:11 +0900 Jugwan Eom (JE) wrote:

JE> I'm working to implement the Linux Oprofile functionality on L4/Fiasco 
JE> environment.
JE> OProfile configures the performance counter to raise a NMI whenever the 
JE> counter overflows. I modified the NMI handling codes in 
JE> handle_slow_trap() to collect samples but I encountered an strange 
JE> system behavior, REBOOTING without any information. If there is no user 
JE> application activity, the system looks fine. Otherwise, the system 
JE> reboots even if a very simple application like hello runs and the 
JE> required time before reboot varies.
JE> I don't know what causes this behavior. IMHO, it seems a kind of triple 
JE> fault. Is there any one give me an advice?

It's rather unlikely that anyone will be able to help, unless you make your code
and configuration available.

		- Udo
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