public CapturedMetric[] GetMetrics()
{
CapturedMetadata[] profiledMethodsCopy;
CapturedMetric[] metrics;
lock (registrationLock)
{
profiledMethodsCopy = Metadata;
metrics = new CapturedMetric[ProfiledMethodCount];
}
var treadLocalCollectorsCopy = _collectors.Values;
var timestamp = ReferenceFrame.Now();
for (var i = 0; i < metrics.Length; i++)
{
var method = profiledMethodsCopy[i];
var attempts = 0;
while (true)
{
metrics[i].Timestamp = timestamp.Ticks;
foreach (var threadLocalCollector in treadLocalCollectorsCopy)
{
if (threadLocalCollector.GetSample(method, out var threadLocalData))
{
metrics[i].AddData(threadLocalData);
}
}
timestamp = ReferenceFrame.Now();
// Detect if our thread has been preempted, and retry if so.
if (timestamp.Ticks - metrics[i].Timestamp < timestampTolerance)
{
break;
}
else
{
metrics[i] = default;
attempts++;
if (attempts > 3)
{
Console.WriteLine("Too many non-voluntary preemptions in the publisher thread. ");
metrics[i].SetInvalid();
break;
}
}
}
}
return(metrics);
}
private void PublishMetrics(IReadOnlyList <CapturedMetadata> methods, CapturedMetric[] metrics)
{
for (var i = 0; i < metrics.Length; i++)
{
CapturedMetric lastSample;
if (i < lastSamples.Length)
{
lastSample = lastSamples[i];
}
else
{
lastSample = new CapturedMetric {
Timestamp = ReferenceFrame.StartTime.Ticks
};
}
metrics[i].GetDifference(lastSample, out var differenceSample);
PublishMetric(methods[i], differenceSample);
}
lastSamples = metrics;
}