/// <summary>
/// Initializes a new instance of the <see cref="HdrSnapshot" /> class.
/// </summary>
/// <param name="histogram">The histogram.</param>
/// <param name="minValue">The minimum value.</param>
/// <param name="minUserValue">The minimum user value.</param>
/// <param name="maxValue">The maximum value.</param>
/// <param name="maxUserValue">The maximum user value.</param>
public HdrSnapshot(HistogramBase histogram, long minValue, string minUserValue, long maxValue, string maxUserValue)
{
_histogram = histogram;
Min = !string.IsNullOrWhiteSpace(minUserValue)
? minValue
: histogram.HighestEquivalentValue(histogram.RecordedValues().Select(hiv => hiv.ValueIteratedTo).FirstOrDefault());
MinUserValue = minUserValue;
Max = !string.IsNullOrWhiteSpace(maxUserValue) ? maxValue : _histogram.GetMaxValue();
MaxUserValue = maxUserValue;
}
public void TestScalingEquivalence()
{
Assert.AreEqual(
LongHistogram.GetMean() * 512,
ScaledHistogram.GetMean(), ScaledHistogram.GetMean() * 0.000001,
"averages should be equivalent");
Assert.AreEqual(
LongHistogram.TotalCount,
ScaledHistogram.TotalCount,
"total count should be the same");
Assert.AreEqual(
LongHistogram.LowestEquivalentValue(LongHistogram.GetValueAtPercentile(99.0)) * 512,
ScaledHistogram.LowestEquivalentValue(ScaledHistogram.GetValueAtPercentile(99.0)),
"99%'iles should be equivalent");
Assert.AreEqual(
ScaledHistogram.HighestEquivalentValue(LongHistogram.GetMaxValue() * 512),
ScaledHistogram.GetMaxValue(),
"Max should be equivalent for scaled data");
// Same for post-corrected:
Assert.AreEqual(
LongHistogram.GetMean() * 512,
ScaledHistogram.GetMean(), ScaledHistogram.GetMean() * 0.000001,
"averages should be equivalent");
Assert.AreEqual(
PostCorrectedHistogram.TotalCount,
PostCorrectedScaledHistogram.TotalCount,
"total count should be the same");
Assert.AreEqual(
PostCorrectedHistogram.LowestEquivalentValue(PostCorrectedHistogram.GetValueAtPercentile(99.0)) * 512,
PostCorrectedScaledHistogram.LowestEquivalentValue(PostCorrectedScaledHistogram.GetValueAtPercentile(99.0)),
"99%'iles should be equivalent");
Assert.AreEqual(
PostCorrectedScaledHistogram.HighestEquivalentValue(PostCorrectedHistogram.GetMaxValue() * 512),
PostCorrectedScaledHistogram.GetMaxValue(),
"Max should be equivalent for post-corrected data");
}