机器的.net核心cpu使用情况

Question

我最近从 c# 迁移到 .net 核心。在 c# 中，我用这个来获取 CPU 使用率：

PerformanceCounter cpuCounter;
PerformanceCounter ramCounter;

cpuCounter = new PerformanceCounter("Processor", "% Processor Time", "_Total");

public string getCurrentCpuUsage(){
            return cpuCounter.NextValue()+"%";
}

但是.net core PerformanceCounter 不可用，解决方案是什么？请给我一个建议。

Answer 1

性能计数器不在 Linux 中，因此不在 NET Core 中。替代方式：

private async Task<double> GetCpuUsageForProcess()
{
    var startTime = DateTime.UtcNow;
    var startCpuUsage = Process.GetProcesses().Sum(a => a.TotalProcessorTime.TotalMilliseconds);
    await Task.Delay(500);

    var endTime = DateTime.UtcNow;
    var endCpuUsage = Process.GetProcesses().Sum(a => a.TotalProcessorTime.TotalMilliseconds);
    var cpuUsedMs = endCpuUsage - startCpuUsage;
    var totalMsPassed = (endTime - startTime).TotalMilliseconds;
    var cpuUsageTotal = cpuUsedMs / (Environment.ProcessorCount * totalMsPassed);
    return cpuUsageTotal * 100;
}

Answer 2

在 Mac 上，我采用与 you already have to go to get memory usage 相同的方法：shell 输出到命令行实用程序，例如 top，然后解析输出。

这是我的代码：

        private static string[] GetOsXTopOutput()
        {
            var info = new ProcessStartInfo("top");
            info.Arguments = "-l 1 -n 0";
            info.RedirectStandardOutput = true;

            string output;
            using (var process = Process.Start(info))
            {
                output = process.StandardOutput.ReadToEnd();
            }

            return output.Split('\n');
        }

        public static double GetOverallCpuUsagePercentage()
        {
            if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
            {
                var lines = GetOsXTopOutput();

                // Example: "CPU usage: 8.69% user, 21.73% sys, 69.56% idle"
                var pattern = @"CPU usage: \d+\.\d+% user, \d+\.\d+% sys, (\d+\.\d+)% idle";
                Regex r = new Regex(pattern, RegexOptions.IgnoreCase);
                foreach (var line in lines)
                {
                    Match m = r.Match(line);
                    if (m.Success)
                    {
                        var idle = double.Parse(m.Groups[1].Value);
                        var used = 100 - idle;
                        return used;
                    }
                }

                // Or throw an exception
                return -1.0;
            }
            else
            {
                // E.g., Melih Altıntaş's solution: https://stackoverflow.com/a/59465268/132042
                ...
            }
        }