I am trying to collect some performance statistics on Beagleboard Rev C4, and Beagleboard xM.
Oprofile runs perfectly when I set the profiling event to CPU_CYCLE, however on both boards, when I try to profile any cache related events, I get an empty samples folder and no result.
I did not get any error (not even in the kernel messages) when I run oprofile with
opcontrol --event=L1_DATA_MISS:10000
But profiling seem to have failed. It's the same story for all other cache related events. Am I doing something wrong, or are these PMUs unavailable on Beagleboards?
