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Commit e6c84f82 authored by Jakob Johnson's avatar Jakob Johnson
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Add thin wrapper for perf_event_open API 

  - Add PerfEvent class to handle creating ring buffers and handle the resources associated with a perf_event
  - Refactor IntelPT collection code to use this new API
  - Add TSC to timestamp conversion logic with unittest

Differential Revision: https://reviews.llvm.org/D121734
parent 9b1fa6f8
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