Implemented node system statistics

2026-03-21 18:21:09 +00:00
parent ba5e364c05
commit 6d447a0ff9
28 changed files with 1402 additions and 156 deletions
--- a/MoonlightServers.Daemon/Helpers/SystemMetrics.Cpu.cs
+++ b/MoonlightServers.Daemon/Helpers/SystemMetrics.Cpu.cs
@@ -0,0 +1,76 @@
+namespace MoonlightServers.Daemon.Helpers;
+
+public partial class SystemMetrics
+{
+    public record CpuSnapshot(
+        string ModelName,
+        double TotalUsagePercent,
+        IReadOnlyList<double> CoreUsagePercents
+    );
+    
+    private record RawCpuLine(
+        long User,
+        long Nice,
+        long System,
+        long Idle,
+        long Iowait,
+        long Irq,
+        long Softirq,
+        long Steal
+    );
+    
+    private static async Task<List<RawCpuLine>> ReadRawCpuStatsAsync()
+    {
+        var lines = await File.ReadAllLinesAsync("/proc/stat");
+        var result = new List<RawCpuLine>();
+
+        foreach (var line in lines)
+        {
+            // All cpu* lines appear at the top of the file; stop on the first non-cpu line.
+            if (!line.StartsWith("cpu", StringComparison.Ordinal))
+                break;
+
+            var p = line.Split(' ', StringSplitOptions.RemoveEmptyEntries);
+            if (p.Length < 8)
+                continue;
+
+            result.Add(new RawCpuLine(
+                User: long.Parse(p[1]),
+                Nice: long.Parse(p[2]),
+                System: long.Parse(p[3]),
+                Idle: long.Parse(p[4]),
+                Iowait: long.Parse(p[5]),
+                Irq: long.Parse(p[6]),
+                Softirq: long.Parse(p[7]),
+                Steal: p.Length > 8 ? long.Parse(p[8]) : 0L
+            ));
+        }
+
+        return result;
+    }
+
+    private static async Task<string> ReadCpuModelNameAsync()
+    {
+        var lines = await File.ReadAllLinesAsync("/proc/cpuinfo");
+        var line = lines.FirstOrDefault(l => l.StartsWith("model name", StringComparison.OrdinalIgnoreCase));
+        return line is not null ? line.Split(':')[1].Trim() : "Unknown";
+    }
+
+    private static CpuSnapshot ComputeCpuUsage(string modelName, List<RawCpuLine> s1, List<RawCpuLine> s2)
+    {
+        // Index 0 = aggregate "cpu" row; indices 1+ = "cpu0", "cpu1"
+        var totalUsage = s1.Count > 0 ? Usage(s1[0], s2[0]) : 0.0;
+        var coreUsages = s1.Skip(1).Zip(s2.Skip(1), Usage).ToList();
+
+        return new CpuSnapshot(modelName, totalUsage, coreUsages);
+
+        static double Usage(RawCpuLine a, RawCpuLine b)
+        {
+            var idleDelta = (b.Idle + b.Iowait) - (a.Idle + a.Iowait);
+            var totalDelta = (b.User + b.Nice + b.System + b.Idle + b.Iowait + b.Irq + b.Softirq + b.Steal)
+                             - (a.User + a.Nice + a.System + a.Idle + a.Iowait + a.Irq + a.Softirq + a.Steal);
+            return totalDelta <= 0 ? 0.0 : Math.Round((1.0 - (double)idleDelta / totalDelta) * 100.0, 2);
+        }
+    }
+
+}