From 97c74fc91ba4c00f135d16ed012c6d65a68680ae Mon Sep 17 00:00:00 2001
From: L3tum <9307432+L3tum@users.noreply.github.com>
Date: Sat, 19 Oct 2019 14:17:59 +0200
Subject: [PATCH] Remove frequency monitoring because it's way too expensive

---
 .../MachineInformationGatherer.cs             | 84 -------------------
 README.md                                     |  6 --
 2 files changed, 90 deletions(-)

diff --git a/HardwareInformation/MachineInformationGatherer.cs b/HardwareInformation/MachineInformationGatherer.cs
index 0dc20eb..630c699 100644
--- a/HardwareInformation/MachineInformationGatherer.cs
+++ b/HardwareInformation/MachineInformationGatherer.cs
@@ -307,89 +307,5 @@ private static void GetCoreSpeeds()
 			information.Cpu.MaxClockSpeed =
 				information.Cpu.Cores.Count > 0 ? information.Cpu.Cores.Max(c => c.MaxClockSpeed) : 0;
 		}
-
-		/// <summary>
-		///     Monitors the frequency of the specified core until the token is cancelled. Reports maximum frequency in
-		///     Core.MaxClockSpeed and minimum frequency in Core.NormalClockSpeed.
-		/// </summary>
-		/// <param name="coreNumber">
-		///     0-indexed number of the core to monitor. Includes hyperthreaded cores (e.g. 0 and 1 are the
-		///     same physical core)
-		/// </param>
-		/// <param name="token">Token to stop the monitoring.</param>
-		/// <param name="measurementDelay">
-		///     Delay in ms for taking the measurement (e.g. wait $measurementDelay, take measurement,
-		///     repeat). Values under 1000ms may produce wrong results.
-		/// </param>
-		/// <returns></returns>
-		public static Task<MachineInformation.Core> MonitorCoreFrequencies(int coreNumber,
-			CancellationToken token, int measurementDelay = 1000)
-		{
-			if (coreNumber > 64 || coreNumber < 0)
-			{
-				throw new ArgumentException("Core Number must be below 65 and above 0!");
-			}
-
-			if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows) &&
-			    !RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
-			{
-				throw new PlatformNotSupportedException("This method only works on Windows or Linux!");
-			}
-
-			return Task.Run(() =>
-			{
-				var core = new MachineInformation.Core();
-				var highestFrequency = 0u;
-				var lowestFrequency = 0u;
-				PerformanceCounter counter = null;
-				var normalFrequency = 0u;
-
-				if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
-				{
-					counter = new PerformanceCounter("Processor Information", "% Processor Performance",
-						"0," + coreNumber);
-					counter.NextValue();
-
-					ManagementObject Mo = new ManagementObject($"Win32_Processor.DeviceID='CPU{coreNumber}'");
-
-					normalFrequency = (uint) Mo["MaxClockSpeed"];
-				}
-
-				while (!token.IsCancellationRequested)
-				{
-					Thread.Sleep(measurementDelay);
-					var measuredValue = 0u;
-
-					if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
-					{
-						measuredValue = (uint) (counter.NextValue() / 100.0f * normalFrequency);
-					}
-					else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
-					{
-						// KHz
-						var freq = ulong.Parse(
-							File.ReadAllText($"/sys/devices/system/cpu/cpu{coreNumber}/cpufreq/scaling_cur_freq"));
-
-						measuredValue = (uint) (freq / 1000);
-					}
-
-					if (measuredValue > highestFrequency)
-					{
-						highestFrequency = measuredValue;
-					}
-
-					if (measuredValue < lowestFrequency)
-					{
-						lowestFrequency = measuredValue;
-					}
-				}
-
-				core.Number = (uint) coreNumber;
-				core.MaxClockSpeed = highestFrequency;
-				core.NormalClockSpeed = lowestFrequency;
-
-				return core;
-			});
-		}
 	}
 }
\ No newline at end of file
diff --git a/README.md b/README.md
index f93d708..f67e586 100644
--- a/README.md
+++ b/README.md
@@ -90,12 +90,6 @@ HRF = Human Readable Format. Normal capacity/size is in bytes, while this is a s
 
 **\*\*\*\* Only available on AMD platforms.**
 
-One additional feature is drive-by core frequency monitoring. This is available on Windows and Linux by calling the following function. See the doc blocks for more information.
-
-``
-MachineInformationGatherer.MonitorCoreFrequencies(int coreNumber, CancellationToken token, int measurementDelay = 1000) : Task<MachineInformation.Core>
-``
-
 ## Goal
 
 The immediate goal is somewhat feature-parity with CPU-Z/CPUID.