c# - ManagementObjectSearcher WMIquery 很慢

Question

我有一个重复运行的 .NET 6.0 代码来监控机器上的 CPU 并将统计信息发送到仪表板服务器:

var stopwatch = Stopwatch.StartNew();
var processorQuery = new ManagementObjectSearcher().WMIquery("select * from Win32_Processor");
Log(stopwatch.ElapsedMilliseconds); // !!! 2 to 10 seconds!

// now process the results
var processors = new JArray();
foreach (var processorMO in processorQuery) {
  var name = processorMO["Name"]?.ToString() ?? "";
  var addressWidth = Double.Parse(processorMO["AddressWidth"]?.ToString() ?? "-1");
  if (name.IndexOf(addressWidth.ToString()) != -1) name = $"{name} x{addressWidth}";
  var maxClockSpeedGHz = Double.Parse(processorMO["MaxClockSpeed"]?.ToString() ?? "-1000") / 1000.0;
  if (name.IndexOf(maxClockSpeedGHz.ToString()) != -1) name = $"{name} {maxClockSpeedGHz}GHz";
  var numberOfCores = Double.Parse(processorMO["NumberOfCores"]?.ToString() ?? "-1");
  name = $"{name} {numberOfCores}cores";
  name = name.Replace("CPU ", " ").Replace(" M ", " M").Replace(" @ ", " ");
  name = string.Join(" ", name.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries)); // replace multiple spaces with single
  int loadPercentage = (int)Double.Parse(processorMO["LoadPercentage"]?.ToString() ?? "-1");
  processors.Add(new JObject() { { "Name", name }, { "LoadPercentage", loadPercentage } });
}

我的问题是对 WMIquery 的调用非常慢..从2.5到10秒!
有什么我做错了吗？有没有办法更快地获取这些信息？

(PS 还有哪些标签在这里有用？)

Answer 1

您可以使用 GetSystemTimes，它为所有内核提供空闲、内核和用户时间。
如果你这样做，例如每秒钟您都可以以更有效的方式自己计算总体 CPU 利用率。
看

https://docs.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-getsystemtimes

和

C# System CPU Usage and syncing with Windows Task Manager