Add Working Set runtime counter (#23717)

* Add cpu counter

* Fix windows build

* Make the counter just return current CPU usage as %

* Add Unix

* Fix unix build

* Some cleanup

* rename

* fixing some build errors

* some cleanup

* remove unused using

* more cleanup

* newline

* Add working set counter

* Remove old file

1 files changed, 2 insertions, 0 deletions

diff --git a/src/System.Private.CoreLib/src/System/Diagnostics/Eventing/RuntimeEventSource.cs b/src/System.Private.CoreLib/src/System/Diagnostics/Eventing/RuntimeEventSource.cs
index 31effe3137..d264910086 100644
--- a/src/System.Private.CoreLib/src/System/Diagnostics/Eventing/RuntimeEventSource.cs
+++ b/src/System.Private.CoreLib/src/System/Diagnostics/Eventing/RuntimeEventSource.cs
@@ -21,6 +21,7 @@ namespace System.Diagnostics.Tracing
         private IncrementingPollingCounter _gen2GCCounter;
         private IncrementingPollingCounter _exceptionCounter;
         private PollingCounter _cpuTimeCounter;
+        private PollingCounter _workingSetCounter;
 
         private const int EnabledPollingIntervalMilliseconds = 1000; // 1 second
 
@@ -43,6 +44,7 @@ namespace System.Diagnostics.Tracing
 
                 // 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());
+                _workingSetCounter = _workingSetCounter ?? new PollingCounter("Working Set", this, () => Environment.WorkingSet);
                 _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));