/// <summary>
/// Creates the real time listener.
/// </summary>
/// <param name="providerGuid">The provider unique identifier.</param>
/// <param name="etlSessionConfigName">Name of the etl session configuration.</param>
/// <param name="action">The action.</param>
/// <param name="eventIdFilter">Event Id filter to call the action</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>The ETW listener</returns>
private static RawListener CreateRealTimeListener(
Guid providerGuid,
string etlSessionConfigName,
Action <IDiagnosticHeartbeat> action,
int eventIdFilter,
CancellationToken cancellationToken)
{
return(RawListener.CreateRealTimeListener(
etlSessionConfigName,
eventRecord =>
{
if (eventRecord->EventHeader.ProviderId == providerGuid && eventRecord->EventHeader.Id == eventIdFilter)
{
action(DiagnosticHeartbeat.FromEtwEvent(eventRecord));
}
},
eventTraceLog =>
{
Logger.Log(
LoggerLevel.Info,
LogId,
"CreateRealTimeListener",
"DiagnosticHeartbeat, cancelled = {0}",
cancellationToken.IsCancellationRequested);
return !cancellationToken.IsCancellationRequested;
}));
}
/// <summary>
/// Froms the etw event.
/// </summary>
/// <param name="etwMetricData">The etw metric data.</param>
/// <returns>The diagnostic heartbeat.</returns>
public static unsafe IDiagnosticHeartbeat FromEtwEvent(NativeMethods.EventRecord *etwMetricData)
{
var heartbeat = new DiagnosticHeartbeat();
var pointerInPayload = etwMetricData->UserData;
heartbeat.InstanceName = EtwPayloadManipulationUtils.ReadString(ref pointerInPayload);
var uptimeSec = *((int *)pointerInPayload);
pointerInPayload = EtwPayloadManipulationUtils.Shift(pointerInPayload, sizeof(int));
heartbeat.UptimeInSec = uptimeSec;
var etwEventsDropped = *((int *)pointerInPayload);
pointerInPayload = EtwPayloadManipulationUtils.Shift(pointerInPayload, sizeof(int));
heartbeat.EtwEventsDroppedCount = etwEventsDropped;
var etwEventsLost = *((int *)pointerInPayload);
pointerInPayload = EtwPayloadManipulationUtils.Shift(pointerInPayload, sizeof(int));
heartbeat.EtwEventsLostCount = etwEventsLost;
var aggregatedMetricsDropped = *((int *)pointerInPayload);
pointerInPayload = EtwPayloadManipulationUtils.Shift(pointerInPayload, sizeof(int));
heartbeat.AggregatedMetricsDroppedCount = aggregatedMetricsDropped;
var isNearingEtwLimit = *((byte *)pointerInPayload);
pointerInPayload = EtwPayloadManipulationUtils.Shift(pointerInPayload, sizeof(byte));
heartbeat.IsNearingEtwQueueLimit = isNearingEtwLimit != 0;
var isNearingAggregationLimit = *((byte *)pointerInPayload);
heartbeat.IsNearingAggregationQueueLimit = isNearingAggregationLimit != 0;
return(heartbeat);
}