public void BencharmSummaryWrite(int w)
{
var stopwatch = new Stopwatch();
var summary = new Summary("test_summary", "helpless", new string[0]);
var child = new Summary.Child();
var now = new DateTime(2016, 1, 1, 0, 0, 0, DateTimeKind.Utc);
child.Init(summary, LabelValues.Empty, now);
const int N = 1000;
for (var obsNum = 0; obsNum < 1000000; obsNum++)
{
child.Observe(obsNum, now);
}
stopwatch.Start();
var tasks = new Task[w];
for (var taskNum = 0; taskNum < w; taskNum++)
{
var metric = new Metric();
tasks[taskNum] = Task.Factory.StartNew(() =>
{
for (var i = 0; i < N; i++)
child.Populate(metric, now);
});
}
Task.WaitAll(tasks);
stopwatch.Stop();
TestContext.WriteLine($"{w} tasks doing {N} writes took {stopwatch.Elapsed.TotalMilliseconds} milliseconds");
}
internal Metric Collect()
{
var metric = new Metric();
Populate(metric);
metric.label = _labelValues.WireLabels;
//metric.timestamp_ms = (long) (ts.Subtract(new DateTime(1970, 1, 1))).TotalMilliseconds;
return metric;
}
private static void WriteMetric(StreamWriter streamWriter, MetricFamily family, Metric metric)
{
var familyName = family.name;
if (metric.gauge!=null)
{
streamWriter.WriteLine(SimpleValue(familyName, metric.gauge.value, metric.label));
}
else if (metric.counter!=null)
{
streamWriter.WriteLine(SimpleValue(familyName, metric.counter.value, metric.label));
}
else if (metric.summary != null)
{
streamWriter.WriteLine(SimpleValue(familyName, metric.summary.sample_sum, metric.label, "_sum"));
streamWriter.WriteLine(SimpleValue(familyName, metric.summary.sample_count, metric.label, "_count"));
foreach (var quantileValuePair in metric.summary.quantile)
{
var quantile = double.IsPositiveInfinity(quantileValuePair.quantile) ? "+Inf" : quantileValuePair.quantile.ToString(CultureInfo.InvariantCulture);
streamWriter.WriteLine(SimpleValue(familyName, quantileValuePair.value, metric.label.Concat(new []{new LabelPair{name= "quantile", value = quantile}})));
}
}
else if (metric.histogram != null)
{
streamWriter.WriteLine(SimpleValue(familyName, metric.histogram.sample_sum, metric.label, "_sum"));
streamWriter.WriteLine(SimpleValue(familyName, metric.histogram.sample_count, metric.label, "_count"));
foreach (var bucket in metric.histogram.bucket)
{
var value = double.IsPositiveInfinity(bucket.upper_bound) ? "+Inf" : bucket.upper_bound.ToString(CultureInfo.InvariantCulture);
streamWriter.WriteLine(SimpleValue(familyName, bucket.cumulative_count, metric.label.Concat(new []{new LabelPair{name = "le", value = value}}), "_bucket"));
}
}
else
{
//not supported
}
}
protected abstract void Populate(Metric metric);
public void TestSummaryDecay()
{
var baseTime = new DateTime(2015, 1, 1, 0, 0, 0, DateTimeKind.Utc);
var sum = new Summary("test_summary", "helpless", new string[0], objectives: new List<QuantileEpsilonPair> {new QuantileEpsilonPair(0.1d, 0.001d)}, maxAge: TimeSpan.FromSeconds(100), ageBuckets: 10);
var child = new Summary.Child();
child.Init(sum, LabelValues.Empty, baseTime);
Advanced.DataContracts.Summary m;
var metric = new Metric();
for (var i = 0; i < 1000; i++)
{
var now = baseTime.AddSeconds(i);
child.Observe(i, now);
if (i%10 == 0)
{
child.Populate(metric, now);
m = metric.summary;
var got = m.quantile[0].value;
var want = Math.Max((double) i/10, (double) i - 90);
Assert.That(Math.Abs(got-want), Is.LessThanOrEqualTo(1), $"{i}. got {got} want {want}");
}
}
// Wait for MaxAge without observations and make sure quantiles are NaN.
child.Populate(metric, baseTime.AddSeconds(1000).AddSeconds(100));
m = metric.summary;
Assert.That(m.quantile[0].value, Is.NaN);
}
public void TestSummary()
{
var summary = Metrics.CreateSummary("Summary", "helpless", "labelName").Labels("labelValue");
// Default objectives are 0.5, 0.9, 0.99 quantile
const int numIterations = 1000;
const int numObservations = 100;
var expectedSum = 0;
for (var iteration = 0; iteration < numIterations; iteration++)
{
// 100 observations from 0 to 99
for (var observation = 0; observation < numObservations; observation++)
{
summary.Observe(observation);
expectedSum += observation;
}
}
var metric = new Metric();
summary.Populate(metric, DateTime.UtcNow);
var m = metric.summary;
Assert.That(m.sample_count, Is.EqualTo(numObservations * numIterations));
Assert.That(m.sample_sum, Is.EqualTo(expectedSum));
Assert.That(m.quantile.Single(_ => _.quantile.Equals(0.5)).value, Is.EqualTo(50).Within(2));
Assert.That(m.quantile.Single(_ => _.quantile.Equals(0.9)).value, Is.EqualTo(90).Within(2));
Assert.That(m.quantile.Single(_ => _.quantile.Equals(0.99)).value, Is.EqualTo(99).Within(2));
}
