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