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hdrhistogram: adjust reported values to be in nanoseconds #37

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Merged
CodeLieutenant merged 1 commit into from
Jun 1, 2026
Merged

hdrhistogram: adjust reported values to be in nanoseconds #37

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12 changes: 7 additions & 5 deletions core/src/main/java/site/ycsb/measurements/OneMeasurementHdrHistogram.java
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Original file line number Diff line number Diff line change
Expand Up @@ -111,7 +111,8 @@ public OneMeasurementHdrHistogram(String name, Properties props) {
* Using {@link Recorder} to support concurrent updates to histogram.
*/
public void measure(long latencyInMicros) {
histogram.recordValue(latencyInMicros);
// sct consumes hdr histograms expecting those to be in nanoseconds, so we adjust here.
histogram.recordValue(latencyInMicros * 1000);
}

/**
Expand All @@ -130,13 +131,14 @@ public void exportMeasurements(MeasurementsExporter exporter) throws IOException
log.close();
}
exporter.write(getName(), "Operations", totalHistogram.getTotalCount());
exporter.write(getName(), "AverageLatency(us)", totalHistogram.getMean());
exporter.write(getName(), "MinLatency(us)", totalHistogram.getMinValue());
exporter.write(getName(), "MaxLatency(us)", totalHistogram.getMaxValue());
// We need to divide by 1000 to convert back to micros for reporting, since we multiplied by 1000 when recording to convert from micros to nanos.
exporter.write(getName(), "AverageLatency(us)", totalHistogram.getMean() / 1000);
exporter.write(getName(), "MinLatency(us)", totalHistogram.getMinValue() / 1000);
exporter.write(getName(), "MaxLatency(us)", totalHistogram.getMaxValue() / 1000);

for (Double percentile : percentiles) {
exporter.write(getName(), ordinal(percentile) + "PercentileLatency(us)",
totalHistogram.getValueAtPercentile(percentile));
totalHistogram.getValueAtPercentile(percentile) / 1000);
}

exportStatusCounts(exporter);
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