[Bug translator/20410] New: Support perf probes limited to user mode

[jistone at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=20410

            Bug ID: 20410
           Summary: Support perf probes limited to user mode
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: translator
          Assignee: systemtap at sourceware dot org
          Reporter: jistone at redhat dot com
  Target Milestone: ---

It would be nice to support a way to limit perf counters to just user mode. 
The kernel API exists -- we just need to set exclude_kernel=1 and exclude_hv=1
in the perf_event_attr.

See this thread: https://sourceware.org/ml/systemtap/2016-q3/msg00090.html

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