protected override void OnEventCommand(System.Diagnostics.Tracing.EventCommandEventArgs command)
{
if (command.Command == EventCommand.Enable)
{
if (_counters == null)
{
// NOTE: These counters will NOT be disposed on disable command because we may be introducing
// a race condition by doing that. We still want to create these lazily so that we aren't adding
// overhead by at all times even when counters aren't enabled.
_counters = new EventCounter[] {
// TODO: process info counters
// GC info counters
new EventCounter("Total Memory by GC", this),
new EventCounter("Gen 0 GC Count", this),
new EventCounter("Gen 1 GC Count", this),
new EventCounter("Gen 2 GC Count", this),
new EventCounter("Exception Count", this)
};
}
// Initialize the timer, but don't set it to run.
// The timer will be set to run each time PollForTracingCommand is called.
// TODO: We should not need this timer once we are done settling upon a high-level design for
// what EventCounter is capable of doing. Once that decision is made, we should be able to
// get rid of this.
if (_timer == null)
{
_timer = new Timer(
callback: new TimerCallback(PollForCounterUpdate),
state: null,
dueTime: Timeout.Infinite,
period: Timeout.Infinite,
flowExecutionContext: false);
}
// Trigger the first poll operation on when this EventSource is enabled
PollForCounterUpdate(null);
}
else if (command.Command == EventCommand.Disable)
{
if (_timer != null)
{
_timer.Change(Timeout.Infinite, Timeout.Infinite); // disable the timer from running until System.Runtime is re-enabled
}
}
}
protected override void OnEventCommand(System.Diagnostics.Tracing.EventCommandEventArgs command)
{
if (command.Command == EventCommand.Enable)
{
// NOTE: These counters will NOT be disposed on disable command because we may be introducing
// a race condition by doing that. We still want to create these lazily so that we aren't adding
// overhead by at all times even when counters aren't enabled.
// On disable, PollingCounters will stop polling for values so it should be fine to leave them around.
_gcHeapSizeCounter = _gcHeapSizeCounter ?? new PollingCounter("GC Heap Size", this, () => GC.GetTotalMemory(false));
_gen0GCCounter = _gen0GCCounter ?? new IncrementingPollingCounter("Gen 0 GC Count", this, () => GC.CollectionCount(0));
_gen1GCCounter = _gen1GCCounter ?? new IncrementingPollingCounter("Gen 1 GC Count", this, () => GC.CollectionCount(1));
_gen2GCCounter = _gen2GCCounter ?? new IncrementingPollingCounter("Gen 2 GC Count", this, () => GC.CollectionCount(2));
_exceptionCounter = _exceptionCounter ?? new IncrementingPollingCounter("Exception Count", this, () => Exception.GetExceptionCount());
}
}
protected override void OnEventCommand(System.Diagnostics.Tracing.EventCommandEventArgs command)
{
if (command.Command == EventCommand.Enable)
{
// NOTE: These counters will NOT be disposed on disable command because we may be introducing
// a race condition by doing that. We still want to create these lazily so that we aren't adding
// overhead by at all times even when counters aren't enabled.
// On disable, PollingCounters will stop polling for values so it should be fine to leave them around.
_cpuTimeCounter = _cpuTimeCounter ?? new PollingCounter("cpu-usage", this, () => RuntimeEventSourceHelper.GetCpuUsage())
{
DisplayName = "CPU Usage"
};
_workingSetCounter = _workingSetCounter ?? new PollingCounter("working-set", this, () => (double)(Environment.WorkingSet / 1000000))
{
DisplayName = "Working Set"
};
_gcHeapSizeCounter = _gcHeapSizeCounter ?? new PollingCounter("gc-heap-size", this, () => (double)(GC.GetTotalMemory(false) / 1000000))
{
DisplayName = "GC Heap Size"
};
_gen0GCCounter = _gen0GCCounter ?? new IncrementingPollingCounter("gen-0-gc-count", this, () => GC.CollectionCount(0))
{
DisplayName = "Gen 0 GC Count", DisplayRateTimeScale = new TimeSpan(0, 1, 0)
};
_gen1GCCounter = _gen1GCCounter ?? new IncrementingPollingCounter("gen-1-gc-count", this, () => GC.CollectionCount(1))
{
DisplayName = "Gen 1 GC Count", DisplayRateTimeScale = new TimeSpan(0, 1, 0)
};
_gen2GCCounter = _gen2GCCounter ?? new IncrementingPollingCounter("gen-2-gc-count", this, () => GC.CollectionCount(2))
{
DisplayName = "Gen 2 GC Count", DisplayRateTimeScale = new TimeSpan(0, 1, 0)
};
_exceptionCounter = _exceptionCounter ?? new IncrementingPollingCounter("exception-count", this, () => Exception.GetExceptionCount())
{
DisplayName = "Exception Count", DisplayRateTimeScale = new TimeSpan(0, 0, 1)
};
}
}
protected override void OnEventCommand(System.Diagnostics.Tracing.EventCommandEventArgs command)
{
}
protected virtual void OnEventCommand(System.Diagnostics.Tracing.EventCommandEventArgs command)
{
}