Function PrettyPrintTimeSeries

be/src/util/runtime-profile.cc:1501–1520

Helper to pretty-print the data for a time series counter. 'num' is the number of values in 'samples'. The format is as follow: - ( ): , ,

// The format is as follow:
//    - <Label> (<period>): <val1>, <val2>, <etc>
static void PrettyPrintTimeSeries(const string& label, const int64_t* samples, int num,
    int period_ms, const string& prefix, TUnit::type unit, ostream* s) {
  ostream& stream = *s;
  if (num == 0) return;
  // Clamp number of printed values at 64, the maximum number of values in the
  // SamplingTimeSeriesCounter.
  int step = 1 + (num - 1) / 64;
  period_ms *= step;
  stream << prefix << "   - " << label << " ("
         << PrettyPrinter::Print(period_ms * 1000000L, TUnit::TIME_NS) << "): ";
  for (int i = 0; i < num; i += step) {
    stream << PrettyPrinter::Print(samples[i], unit);
    if (i + step < num) stream << ", ";
  }
  if (step > 1) {
    stream << " (Showing " << ((num + 1) / step) << " of " << num << " values from "
      "Thrift Profile)";
  }
  stream << endl;
}

void RuntimeProfileBase::PrettyPrintTimeline(ostream* s, const string& prefix,
    const string& name, int64_t duration,