307 lines
11 KiB
C#
307 lines
11 KiB
C#
// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
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// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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// Copyright (C) LibreHardwareMonitor and Contributors.
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// Partial Copyright (C) Michael Möller <mmoeller@openhardwaremonitor.org> and Contributors.
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// All Rights Reserved.
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using System;
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using System.Diagnostics;
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using System.Globalization;
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using System.Text;
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namespace LibreHardwareMonitor.Hardware.CPU
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{
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public class GenericCpu : Hardware
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{
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protected readonly int _coreCount;
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protected readonly CpuId[][] _cpuId;
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protected readonly uint _family;
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protected readonly uint _model;
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protected readonly uint _packageType;
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protected readonly uint _stepping;
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private readonly Sensor[] _coreLoads;
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private readonly CpuLoad _cpuLoad;
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private readonly double _estimatedTimeStampCounterFrequency;
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private readonly double _estimatedTimeStampCounterFrequencyError;
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private readonly bool _isInvariantTimeStampCounter;
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private readonly Sensor _totalLoad;
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private readonly Vendor _vendor;
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private long _lastTime;
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private ulong _lastTimeStampCount;
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public GenericCpu(int processorIndex, CpuId[][] cpuId, ISettings settings) : base(cpuId[0][0].Name, CreateIdentifier(cpuId[0][0].Vendor, processorIndex), settings)
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{
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_cpuId = cpuId;
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_vendor = cpuId[0][0].Vendor;
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_family = cpuId[0][0].Family;
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_model = cpuId[0][0].Model;
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_stepping = cpuId[0][0].Stepping;
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_packageType = cpuId[0][0].PkgType;
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Index = processorIndex;
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_coreCount = cpuId.Length;
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// check if processor has MSRs
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if (cpuId[0][0].Data.GetLength(0) > 1 && (cpuId[0][0].Data[1, 3] & 0x20) != 0)
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HasModelSpecificRegisters = true;
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else
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HasModelSpecificRegisters = false;
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// check if processor has a TSC
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if (cpuId[0][0].Data.GetLength(0) > 1 && (cpuId[0][0].Data[1, 3] & 0x10) != 0)
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HasTimeStampCounter = true;
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else
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HasTimeStampCounter = false;
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// check if processor supports an invariant TSC
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if (cpuId[0][0].ExtData.GetLength(0) > 7 && (cpuId[0][0].ExtData[7, 3] & 0x100) != 0)
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_isInvariantTimeStampCounter = true;
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else
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_isInvariantTimeStampCounter = false;
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_totalLoad = _coreCount > 1 ? new Sensor("CPU Total", 0, SensorType.Load, this, settings) : null;
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_coreLoads = new Sensor[_coreCount];
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for (int i = 0; i < _coreLoads.Length; i++)
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_coreLoads[i] = new Sensor(CoreString(i), i + 1, SensorType.Load, this, settings);
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_cpuLoad = new CpuLoad(cpuId);
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if (_cpuLoad.IsAvailable)
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{
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foreach (Sensor sensor in _coreLoads)
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{
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ActivateSensor(sensor);
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}
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if (_totalLoad != null)
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{
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ActivateSensor(_totalLoad);
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}
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}
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if (HasTimeStampCounter)
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{
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GroupAffinity previousAffinity = ThreadAffinity.Set(cpuId[0][0].Affinity);
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EstimateTimeStampCounterFrequency(out _estimatedTimeStampCounterFrequency, out _estimatedTimeStampCounterFrequencyError);
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ThreadAffinity.Set(previousAffinity);
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}
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else
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{
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_estimatedTimeStampCounterFrequency = 0;
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}
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TimeStampCounterFrequency = _estimatedTimeStampCounterFrequency;
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}
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/// <summary>
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/// Gets the CPUID.
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/// </summary>
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public CpuId[][] CpuId => _cpuId;
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public override HardwareType HardwareType => HardwareType.Cpu;
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public bool HasModelSpecificRegisters { get; }
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public bool HasTimeStampCounter { get; }
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/// <summary>
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/// Gets the CPU index.
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/// </summary>
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public int Index { get; }
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public double TimeStampCounterFrequency { get; private set; }
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protected string CoreString(int i)
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{
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if (_coreCount == 1)
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return "CPU Core";
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return "CPU Core #" + (i + 1);
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}
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private static Identifier CreateIdentifier(Vendor vendor, int processorIndex)
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{
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string s;
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switch (vendor)
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{
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case Vendor.AMD:
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s = "amdcpu";
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break;
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case Vendor.Intel:
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s = "intelcpu";
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break;
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default:
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s = "genericcpu";
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break;
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}
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return new Identifier(s, processorIndex.ToString(CultureInfo.InvariantCulture));
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}
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private void EstimateTimeStampCounterFrequency(out double frequency, out double error)
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{
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// preload the function
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EstimateTimeStampCounterFrequency(0, out double f, out double e);
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EstimateTimeStampCounterFrequency(0, out f, out e);
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// estimate the frequency
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error = double.MaxValue;
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frequency = 0;
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for (int i = 0; i < 5; i++)
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{
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EstimateTimeStampCounterFrequency(0.025, out f, out e);
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if (e < error)
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{
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error = e;
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frequency = f;
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}
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if (error < 1e-4)
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break;
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}
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}
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private static void EstimateTimeStampCounterFrequency(double timeWindow, out double frequency, out double error)
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{
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long ticks = (long)(timeWindow * Stopwatch.Frequency);
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long timeBegin = Stopwatch.GetTimestamp() + (long)Math.Ceiling(0.001 * ticks);
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long timeEnd = timeBegin + ticks;
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while (Stopwatch.GetTimestamp() < timeBegin)
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{ }
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ulong countBegin = OpCode.Rdtsc();
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long afterBegin = Stopwatch.GetTimestamp();
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while (Stopwatch.GetTimestamp() < timeEnd)
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{ }
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ulong countEnd = OpCode.Rdtsc();
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long afterEnd = Stopwatch.GetTimestamp();
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double delta = timeEnd - timeBegin;
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frequency = 1e-6 * ((double)(countEnd - countBegin) * Stopwatch.Frequency) / delta;
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double beginError = (afterBegin - timeBegin) / delta;
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double endError = (afterEnd - timeEnd) / delta;
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error = beginError + endError;
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}
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private static void AppendMsrData(StringBuilder r, uint msr, GroupAffinity affinity)
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{
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if (Ring0.ReadMsr(msr, out uint eax, out uint edx, affinity))
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{
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r.Append(" ");
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r.Append(msr.ToString("X8", CultureInfo.InvariantCulture));
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r.Append(" ");
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r.Append(edx.ToString("X8", CultureInfo.InvariantCulture));
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r.Append(" ");
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r.Append(eax.ToString("X8", CultureInfo.InvariantCulture));
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r.AppendLine();
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}
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}
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protected virtual uint[] GetMsrs()
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{
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return null;
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}
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public override string GetReport()
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{
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StringBuilder r = new();
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switch (_vendor)
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{
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case Vendor.AMD:
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r.AppendLine("AMD CPU");
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break;
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case Vendor.Intel:
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r.AppendLine("Intel CPU");
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break;
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default:
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r.AppendLine("Generic CPU");
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break;
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}
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r.AppendLine();
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r.AppendFormat("Name: {0}{1}", _name, Environment.NewLine);
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r.AppendFormat("Number of Cores: {0}{1}", _coreCount, Environment.NewLine);
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r.AppendFormat("Threads per Core: {0}{1}", _cpuId[0].Length, Environment.NewLine);
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r.AppendLine(string.Format(CultureInfo.InvariantCulture, "Timer Frequency: {0} MHz", Stopwatch.Frequency * 1e-6));
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r.AppendLine("Time Stamp Counter: " + (HasTimeStampCounter ? _isInvariantTimeStampCounter ? "Invariant" : "Not Invariant" : "None"));
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r.AppendLine(string.Format(CultureInfo.InvariantCulture, "Estimated Time Stamp Counter Frequency: {0} MHz", Math.Round(_estimatedTimeStampCounterFrequency * 100) * 0.01));
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r.AppendLine(string.Format(CultureInfo.InvariantCulture,
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"Estimated Time Stamp Counter Frequency Error: {0} Mhz",
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Math.Round(_estimatedTimeStampCounterFrequency * _estimatedTimeStampCounterFrequencyError * 1e5) * 1e-5));
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r.AppendLine(string.Format(CultureInfo.InvariantCulture, "Time Stamp Counter Frequency: {0} MHz", Math.Round(TimeStampCounterFrequency * 100) * 0.01));
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r.AppendLine();
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uint[] msrArray = GetMsrs();
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if (msrArray != null && msrArray.Length > 0)
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{
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for (int i = 0; i < _cpuId.Length; i++)
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{
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r.AppendLine("MSR Core #" + (i + 1));
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r.AppendLine();
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r.AppendLine(" MSR EDX EAX");
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foreach (uint msr in msrArray)
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AppendMsrData(r, msr, _cpuId[i][0].Affinity);
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r.AppendLine();
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}
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}
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return r.ToString();
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}
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public override void Update()
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{
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if (HasTimeStampCounter && _isInvariantTimeStampCounter)
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{
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// make sure always the same thread is used
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GroupAffinity previousAffinity = ThreadAffinity.Set(_cpuId[0][0].Affinity);
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// read time before and after getting the TSC to estimate the error
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long firstTime = Stopwatch.GetTimestamp();
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ulong timeStampCount = OpCode.Rdtsc();
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long time = Stopwatch.GetTimestamp();
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// restore the thread affinity mask
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ThreadAffinity.Set(previousAffinity);
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double delta = (double)(time - _lastTime) / Stopwatch.Frequency;
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double error = (double)(time - firstTime) / Stopwatch.Frequency;
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// only use data if they are measured accurate enough (max 0.1ms delay)
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if (error < 0.0001)
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{
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// ignore the first reading because there are no initial values
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// ignore readings with too large or too small time window
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if (_lastTime != 0 && delta > 0.5 && delta < 2)
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{
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// update the TSC frequency with the new value
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TimeStampCounterFrequency = (timeStampCount - _lastTimeStampCount) / (1e6 * delta);
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}
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_lastTimeStampCount = timeStampCount;
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_lastTime = time;
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}
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}
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if (_cpuLoad.IsAvailable)
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{
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_cpuLoad.Update();
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for (int i = 0; i < _coreLoads.Length; i++)
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_coreLoads[i].Value = _cpuLoad.GetCoreLoad(i);
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if (_totalLoad != null)
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_totalLoad.Value = _cpuLoad.GetTotalLoad();
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}
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}
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}
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}
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