Add GC committed bytes counter

src/libraries/System.Private.CoreLib/src/System/Diagnostics/Tracing/RuntimeEventSource.cs

@@ -28,6 +28,7 @@ internal sealed partial class RuntimeEventSource : EventSource
         private IncrementingPollingCounter? _allocRateCounter;
         private PollingCounter? _timerCounter;
         private PollingCounter? _fragmentationCounter;
+        private PollingCounter? _committedCounter;
 
 #if !MONO
         private IncrementingPollingCounter? _exceptionCounter;
@@ -76,6 +77,7 @@ protected override void OnEventCommand(EventCommandEventArgs command)
                     var gcInfo = GC.GetGCMemoryInfo();
                     return gcInfo.HeapSizeBytes != 0 ? gcInfo.FragmentedBytes * 100d / gcInfo.HeapSizeBytes : 0;
                  }) { DisplayName = "GC Fragmentation", DisplayUnits = "%" };
+                _committedCounter ??= new PollingCounter("gc-committed", this, () => GC.GetGCMemoryInfo().TotalCommittedBytes) { DisplayName = "GC Committed Bytes", DisplayUnits = "B" };
 #if !MONO
                 _exceptionCounter ??= new IncrementingPollingCounter("exception-count", this, () => Exception.GetExceptionCount()) { DisplayName = "Exception Count", DisplayRateTimeScale = new TimeSpan(0, 0, 1) };
                 _gcTimeCounter ??= new PollingCounter("time-in-gc", this, () => GC.GetLastGCPercentTimeInGC()) { DisplayName = "% Time in GC since last GC", DisplayUnits = "%" };

src/tests/tracing/eventcounter/runtimecounters.cs

@@ -0,0 +1,116 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+#if USE_MDT_EVENTSOURCE
+using Microsoft.Diagnostics.Tracing;
+#else
+using System.Diagnostics.Tracing;
+#endif
+using System;
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Diagnostics;
+
+namespace RuntimeEventCounterTests
+{
+    public class RuntimeCounterListener : EventListener
+    {
+        public RuntimeCounterListener()
+        {
+            observedRuntimeCounters = new Dictionary<string, bool>() {
+                { "cpu-usage" , false },
+                { "working-set", false },
+                { "gc-heap-size", false },
+                { "gen-0-gc-count", false },
+                { "gen-1-gc-count", false },
+                { "gen-2-gc-count", false },
+                { "threadpool-thread-count", false },
+                { "monitor-lock-contention-count", false },
+                { "threadpool-queue-length", false },
+                { "threadpool-completed-items-count", false },
+                { "alloc-rate", false },
+                { "active-timer-count", false },
+                { "gc-fragmentation", false },
+                { "gc-committed", false },
+                { "exception-count", false },
+                { "time-in-gc", false },
+                { "gen-0-size", false },
+                { "gen-1-size", false },
+                { "gen-2-size", false },
+                { "loh-size", false },
+                { "poh-size", false },
+                { "assembly-count", false },
+                { "il-bytes-jitted", false },
+                { "methods-jitted-count", false }
+            };
+        }
+        private Dictionary<string, bool> observedRuntimeCounters;
+
+        protected override void OnEventSourceCreated(EventSource source)
+        {
+            if (source.Name.Equals("System.Runtime"))
+            {
+                Dictionary<string, string> refreshInterval = new Dictionary<string, string>();
+                refreshInterval.Add("EventCounterIntervalSec", "1");
+                EnableEvents(source, EventLevel.Informational, (EventKeywords)(-1), refreshInterval);
+            }
+        }
+
+        protected override void OnEventWritten(EventWrittenEventArgs eventData)
+        {
+
+            for (int i = 0; i < eventData.Payload.Count; i++)
+            {
+                IDictionary<string, object> eventPayload = eventData.Payload[i] as IDictionary<string, object>;
+                if (eventPayload != null)
+                {
+                    foreach (KeyValuePair<string, object> payload in eventPayload)
+                    {
+                        if (payload.Key.Equals("Name"))
+                            observedRuntimeCounters[payload.Value.ToString()] = true;
+                    }
+                }
+            }
+        }
+
+        public bool Verify()
+        {
+            foreach (string counterName in observedRuntimeCounters.Keys)
+            {
+                if (!observedRuntimeCounters[counterName])
+                {
+                    Console.WriteLine($"Did not see {counterName}");
+                    return false;
+                }
+                else
+                {
+                    Console.WriteLine($"Saw {counterName}");
+                }
+            }
+            return true;
+        }
+    }
+
+    public partial class TestRuntimeEventCounter
+    {
+        public static int Main(string[] args)
+        {
+            // Create an EventListener.
+            using (RuntimeCounterListener myListener = new RuntimeCounterListener())
+            {
+                Thread.Sleep(3000); 
+                if (myListener.Verify())
+                {
+                    Console.WriteLine("Test passed");
+                    return 100;
+                }
+                else
+                {
+                    Console.WriteLine($"Test Failed - did not see one or more of the expected runtime counters.");
+                    return 1;
+                }
+            }
+        }
+    }
+}

src/tests/tracing/eventcounter/runtimecounters.csproj

@@ -0,0 +1,17 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <CLRTestKind>BuildAndRun</CLRTestKind>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+    <CLRTestPriority>0</CLRTestPriority>
+    <GCStressIncompatible>true</GCStressIncompatible>
+    <!-- This test is timing sensitive and JIT timing affects the results of the test -->
+    <JitOptimizationSensitive>true</JitOptimizationSensitive>
+    <!-- This test has a secondary thread with an infinite loop -->
+    <UnloadabilityIncompatible>true</UnloadabilityIncompatible>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="runtimecounters.cs" />
+    <ProjectReference Include="../common/common.csproj" />
+  </ItemGroup>
+</Project>