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.IsTrue(Math.Abs(got - want) <= 1, $"{i}. got {got} want {want}");
}
}
// Wait for MaxAge without observations and make sure quantiles are NaN.
child.Populate(metric, baseTime.AddSeconds(1000).AddSeconds(100));
m = metric.summary;
Assert.IsTrue(double.IsNaN(m.quantile[0].value));
}
public void BenchmarkSummaryWrite(int w)
{
var stopwatch = new Stopwatch();
var summary = new Summary("test_summary", "helpless", new string[0]);
var child = new Summary.Child();
var now = new DateTime(2016, 1, 1, 0, 0, 0, DateTimeKind.Utc);
child.Init(summary, LabelValues.Empty, now, true);
const int N = 1000;
for (var obsNum = 0; obsNum < 1000000; obsNum++)
{
child.Observe(obsNum, now);
}
stopwatch.Start();
var tasks = new Task[w];
for (var taskNum = 0; taskNum < w; taskNum++)
{
var metric = new Metric();
tasks[taskNum] = Task.Factory.StartNew(() =>
{
for (var i = 0; i < N; i++)
{
child.Populate(metric, now);
}
});
}
Task.WaitAll(tasks);
stopwatch.Stop();
Trace.WriteLine($"{w} tasks doing {N} writes took {stopwatch.Elapsed.TotalMilliseconds} milliseconds");
}
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");
}
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);
}