[Linux Arm Runner] Trying to gauge hardware performance counters using perf_event_open syscall

[visheshruparelia]

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Hi!

I have a use-case where I make perf_event_open(2) syscall (man-page page here). More specifically, it tries to measure CPU Cycles using PERF_COUNT_HW_CPU_CYCLES (more details on the man-page shared above).

Question: If I run the code on a linux x64 runner, it works fine. However, it fails when I run it on the linux arm runner. I have verified that it works on a different linux arm machine (non GH hosted, personal arm based linux machine where I was able to run it) so it is not an architecture issue.

I am trying to understand if there are any known limitations around github hosted linux arm runners in terms of perf_event_open. Any pointer at all would be really appreciated.

Thanks in advance!