Performance counter and NMI handling
zugwan at postech.ac.kr
Wed Nov 15 07:25:11 CET 2006
I'm working to implement the Linux Oprofile functionality on L4/Fiasco
OProfile configures the performance counter to raise a NMI whenever the
counter overflows. I modified the NMI handling codes in
handle_slow_trap() to collect samples but I encountered an strange
system behavior, REBOOTING without any information. If there is no user
application activity, the system looks fine. Otherwise, the system
reboots even if a very simple application like hello runs and the
required time before reboot varies.
I don't know what causes this behavior. IMHO, it seems a kind of triple
fault. Is there any one give me an advice?
Thanks in advance.
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