fix: linux load samples

Author: LucHeart

LiveControlGateway/GatewayLoadSampler.cs

@@ -82,7 +82,7 @@ public byte Measure()
         _containerCpu = _containerMemory = _processCpu = _processMemory = null;
         _listener.RecordObservableInstruments();
 
-        var connections = ToPercent(100d * _hubLifetimeManager.HubCount / _options.MaxHubConnections);
+        var connections = ToPercent((double)_hubLifetimeManager.HubCount / _options.MaxHubConnections);
         var cpu = ToPercent(_containerCpu ?? _processCpu ?? 0);
         var memory = ToPercent(_containerMemory ?? _processMemory ?? 0);
 
@@ -91,7 +91,7 @@ public byte Measure()
         return load;
     }
 
-    private static byte ToPercent(double percent) => (byte)Math.Clamp(Math.Round(percent), 0, 100);
+    private static byte ToPercent(double fraction) => (byte)Math.Clamp(Math.Round(fraction * 100), 0, 100);
 
     /// <inheritdoc />
     public void Dispose() => _listener.Dispose();

LiveControlGateway/Program.cs

@@ -1,4 +1,5 @@
 using System.Diagnostics.Metrics;
+using Microsoft.Extensions.Diagnostics.ResourceMonitoring;
 using Microsoft.Extensions.Options;
 using OpenShock.Common;
 using OpenShock.Common.Extensions;
@@ -46,6 +47,14 @@
 builder.Services.AddSingleton<GatewayMetrics>();
 builder.Services.AddSingleton<HubLifetimeManager>();
 builder.Services.AddResourceMonitoring();
+// The defaults differ per OS ([0, 1] on Linux, [0, 100] on Windows), so pin both to [0, 1].
+#pragma warning disable EXTEXP0008
+builder.Services.Configure<ResourceMonitoringOptions>(options =>
+{
+    options.UseZeroToOneRangeForLinuxMetrics = true;
+    options.UseZeroToOneRangeForMetrics = true;
+});
+#pragma warning restore EXTEXP0008
 builder.Services.AddSingleton<GatewayLoadSampler>();
 builder.Services.AddSingleton<ApiTokenUpdateSubscriber>();