public void RegisterMetrics(MetricFactory metrics)
{
if (!_threadPoolInfo.Enabled && !_runtimeCounters.Enabled)
{
return;
}
NumThreads = metrics.CreateGauge("dotnet_threadpool_num_threads", "The number of active threads in the thread pool");
_runtimeCounters.Events.ThreadPoolThreadCount += e => NumThreads.Set(e.Mean);
Throughput = metrics.CreateCounter("dotnet_threadpool_throughput_total", "The total number of work items that have finished execution in the thread pool");
_runtimeCounters.Events.ThreadPoolCompletedItemsCount += e => Throughput.Inc(e.IncrementedBy);
QueueLength = metrics.CreateHistogram("dotnet_threadpool_queue_length",
"Measures the queue length of the thread pool. Values greater than 0 indicate a backlog of work for the threadpool to process.",
new HistogramConfiguration {
Buckets = _options.QueueLengthHistogramBuckets
}
);
_runtimeCounters.Events.ThreadPoolQueueLength += e => QueueLength.Observe(e.Mean);
NumTimers = metrics.CreateGauge("dotnet_threadpool_timer_count", "The number of timers active");
_runtimeCounters.Events.ActiveTimerCount += e => NumTimers.Set(e.Mean);
if (_threadPoolInfo.Enabled)
{
AdjustmentsTotal = metrics.CreateCounter(
"dotnet_threadpool_adjustments_total",
"The total number of changes made to the size of the thread pool, labeled by the reason for change",
"adjustment_reason");
_threadPoolInfo.Events.ThreadPoolAdjusted += e =>
{
AdjustmentsTotal.Labels(_adjustmentReasonToLabel[e.AdjustmentReason]).Inc();
};
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
// IO threadpool only exists on windows
NumIocThreads = metrics.CreateGauge("dotnet_threadpool_io_num_threads", "The number of active threads in the IO thread pool");
_threadPoolInfo.Events.IoThreadPoolAdjusted += e => NumIocThreads.Set(e.NumThreads);
}
}
}