private async Task HandleProcessInfo(EventPipeEventSource source, Func <Task> stopFunc, CancellationToken token)
{
string commandLine = null;
Action <TraceEvent, Action> processInfoHandler = (TraceEvent traceEvent, Action taskComplete) =>
{
commandLine = (string)traceEvent.PayloadByName("CommandLine");
taskComplete();
};
// Completed when the ProcessInfo event of the Microsoft-DotNETCore-EventPipe event provider is handled
using var processInfoTaskSource = new EventTaskSource <Action <TraceEvent> >(
taskComplete => traceEvent => processInfoHandler(traceEvent, taskComplete),
handler => source.Dynamic.AddCallbackForProviderEvent(MonitoringSourceConfiguration.EventPipeProviderName, "ProcessInfo", handler),
handler => source.Dynamic.RemoveCallback(handler),
token);
// Completed when any trace event is handled
using var anyEventTaskSource = new EventTaskSource <Action <TraceEvent> >(
taskComplete => traceEvent => taskComplete(),
handler => source.Dynamic.All += handler,
handler => source.Dynamic.All -= handler,
token);
// Wait for any trace event to be processed
await anyEventTaskSource.Task;
// Stop the event pipe session
await stopFunc();
// Wait for the ProcessInfo event to be processed
await processInfoTaskSource.Task;
// Notify of command line information
await _processInfoCallback(commandLine, token);
}
protected override async Task OnEventSourceAvailable(EventPipeEventSource eventSource, Func <Task> stopSessionAsync, CancellationToken token)
{
ExecuteCounterLoggerAction((metricLogger) => metricLogger.PipelineStarted());
eventSource.Dynamic.All += traceEvent =>
{
try
{
if (traceEvent.TryGetCounterPayload(_filter, out ICounterPayload counterPayload))
{
ExecuteCounterLoggerAction((metricLogger) => metricLogger.Log(counterPayload));
}
}
catch (Exception)
{
}
};
using var sourceCompletedTaskSource = new EventTaskSource <Action>(
taskComplete => taskComplete,
handler => eventSource.Completed += handler,
handler => eventSource.Completed -= handler,
token);
await sourceCompletedTaskSource.Task;
ExecuteCounterLoggerAction((metricLogger) => metricLogger.PipelineStopped());
}
private async Task HandleGCEvents(EventPipeEventSource source, Func <Task> stopFunc, CancellationToken token)
{
int gcNum = -1;
Action <GCStartTraceData, Action> gcStartHandler = (GCStartTraceData data, Action taskComplete) =>
{
taskComplete();
if (gcNum < 0 && data.Depth == 2 && data.Type != GCType.BackgroundGC)
{
gcNum = data.Count;
}
};
Action <GCBulkNodeTraceData, Action> gcBulkNodeHandler = (GCBulkNodeTraceData data, Action taskComplete) =>
{
taskComplete();
};
Action <GCEndTraceData, Action> gcEndHandler = (GCEndTraceData data, Action taskComplete) =>
{
if (data.Count == gcNum)
{
taskComplete();
}
};
// Register event handlers on the event source and represent their completion as tasks
using var gcStartTaskSource = new EventTaskSource <Action <GCStartTraceData> >(
taskComplete => data => gcStartHandler(data, taskComplete),
handler => source.Clr.GCStart += handler,
handler => source.Clr.GCStart -= handler,
token);
using var gcBulkNodeTaskSource = new EventTaskSource <Action <GCBulkNodeTraceData> >(
taskComplete => data => gcBulkNodeHandler(data, taskComplete),
handler => source.Clr.GCBulkNode += handler,
handler => source.Clr.GCBulkNode -= handler,
token);
using var gcStopTaskSource = new EventTaskSource <Action <GCEndTraceData> >(
taskComplete => data => gcEndHandler(data, taskComplete),
handler => source.Clr.GCStop += handler,
handler => source.Clr.GCStop -= handler,
token);
using var sourceCompletedTaskSource = new EventTaskSource <Action>(
taskComplete => taskComplete,
handler => source.Completed += handler,
handler => source.Completed -= handler,
token);
// A task that is completed whenever GC data is received
Task gcDataTask = Task.WhenAny(gcStartTaskSource.Task, gcBulkNodeTaskSource.Task);
Task gcStopTask = gcStopTaskSource.Task;
DotNetHeapDumpGraphReader dumper = new DotNetHeapDumpGraphReader(TextWriter.Null)
{
DotNetHeapInfo = new DotNetHeapInfo()
};
dumper.SetupCallbacks(_gcGraph, source);
// The event source will not always provide the GC events when it starts listening. However,
// they will be provided when the event source is told to stop processing events. Give the
// event source some time to produce the events, but if it doesn't start producing them within
// a short amount of time (5 seconds), then stop processing events to allow them to be flushed.
Task eventsTimeoutTask = Task.Delay(TimeSpan.FromSeconds(5), token);
Task completedTask = await Task.WhenAny(gcDataTask, eventsTimeoutTask);
token.ThrowIfCancellationRequested();
// If started receiving GC events, wait for the GC Stop event.
if (completedTask == gcDataTask)
{
await gcStopTask;
}
// Stop receiving events; if haven't received events yet, this will force flushing of events.
await stopFunc();
// Wait for all received events to be processed.
await sourceCompletedTaskSource.Task;
// Check that GC data and stop events were received. This is done by checking that the
// associated tasks have ran to completion. If one of them has not reached the completion state, then
// fail the GC dump operation.
if (gcDataTask.Status != TaskStatus.RanToCompletion ||
gcStopTask.Status != TaskStatus.RanToCompletion)
{
throw new InvalidOperationException("Unable to create GC dump due to incomplete GC data.");
}
dumper.ConvertHeapDataToGraph();
_gcGraph.AllowReading();
}
protected override async Task OnEventSourceAvailable(EventPipeEventSource eventSource, Func <Task> stopSessionAsync, CancellationToken token)
{
ExecuteCounterLoggerAction((metricLogger) => metricLogger.PipelineStarted());
eventSource.Dynamic.All += traceEvent =>
{
try
{
// Metrics
if (traceEvent.EventName.Equals("EventCounters"))
{
IDictionary <string, object> payloadVal = (IDictionary <string, object>)(traceEvent.PayloadValue(0));
IDictionary <string, object> payloadFields = (IDictionary <string, object>)(payloadVal["Payload"]);
//Make sure we are part of the requested series. If multiple clients request metrics, all of them get the metrics.
string series = payloadFields["Series"].ToString();
if (GetInterval(series) != CounterIntervalSeconds * 1000)
{
return;
}
string counterName = payloadFields["Name"].ToString();
if (!_filter.IsIncluded(traceEvent.ProviderName, counterName))
{
return;
}
float intervalSec = (float)payloadFields["IntervalSec"];
string displayName = payloadFields["DisplayName"].ToString();
string displayUnits = payloadFields["DisplayUnits"].ToString();
double value = 0;
CounterType counterType = CounterType.Metric;
if (payloadFields["CounterType"].Equals("Mean"))
{
value = (double)payloadFields["Mean"];
}
else if (payloadFields["CounterType"].Equals("Sum"))
{
counterType = CounterType.Rate;
value = (double)payloadFields["Increment"];
if (string.IsNullOrEmpty(displayUnits))
{
displayUnits = "count";
}
//TODO Should we make these /sec like the dotnet-counters tool?
}
// Note that dimensional data such as pod and namespace are automatically added in prometheus and azure monitor scenarios.
// We no longer added it here.
var counterPayload = new CounterPayload(traceEvent.TimeStamp,
traceEvent.ProviderName,
counterName, displayName,
displayUnits,
value,
counterType,
intervalSec);
ExecuteCounterLoggerAction((metricLogger) => metricLogger.Log(counterPayload));
}
}
catch (Exception)
{
}
};
using var sourceCompletedTaskSource = new EventTaskSource <Action>(
taskComplete => taskComplete,
handler => eventSource.Completed += handler,
handler => eventSource.Completed -= handler,
token);
await sourceCompletedTaskSource.Task;
ExecuteCounterLoggerAction((metricLogger) => metricLogger.PipelineStopped());
}