Conflict when accessing PMU counters from userspace

Jason Teplitz jason at tensyr.com
Thu Sep 7 12:36:48 PDT 2017


Hello,

I'm reading the PMU counters from a userspace process, but the cycle
counter keeps getting reset. I don't believe any other running
processes are doing this. Is there something in the kernel that resets
the cycle counter periodically and if so is there an easy way to
disable it?

-Jason



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