ark::perf::PerfEventReport

Defined in header “ark/perf/perf_event_report.hh”.

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This class will aggregate raw perf data into state suitable for emitting a ’tracer’-style JSON report suitable for viewing in Perfetto or the like.

Methods

• void add_sched_switch_batch(const PerfEventDataBatch & batch)
  Adds in a data batch to the report. These will be decoded and stored in the report for later emission. It’s assumed that this batch contains events with ‘sched_switch’ counters.

• std::string tracing_json_report()
  Returns a tracing-style JSON report. This will do some level of post-processing on the data collected so far, and then emit the final report as a string.