Hardware/CPU/IntelCPU.cs
author moel.mich
Wed, 08 Sep 2010 19:29:58 +0000
changeset 182 4801e9eaf979
parent 167 b7cc9d09aefe
child 191 6545fa3ae298
permissions -rw-r--r--
Fixed some Code Analysis warnings.
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/*
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  Version: MPL 1.1/GPL 2.0/LGPL 2.1
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  The contents of this file are subject to the Mozilla Public License Version
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  1.1 (the "License"); you may not use this file except in compliance with
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  the License. You may obtain a copy of the License at
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  http://www.mozilla.org/MPL/
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  Software distributed under the License is distributed on an "AS IS" basis,
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  WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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  for the specific language governing rights and limitations under the License.
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  The Original Code is the Open Hardware Monitor code.
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  The Initial Developer of the Original Code is 
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  Michael Möller <m.moeller@gmx.ch>.
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  Portions created by the Initial Developer are Copyright (C) 2009-2010
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  the Initial Developer. All Rights Reserved.
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  Contributor(s):
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  Alternatively, the contents of this file may be used under the terms of
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  either the GNU General Public License Version 2 or later (the "GPL"), or
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  the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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  in which case the provisions of the GPL or the LGPL are applicable instead
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  of those above. If you wish to allow use of your version of this file only
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  under the terms of either the GPL or the LGPL, and not to allow others to
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  use your version of this file under the terms of the MPL, indicate your
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  decision by deleting the provisions above and replace them with the notice
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  and other provisions required by the GPL or the LGPL. If you do not delete
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  the provisions above, a recipient may use your version of this file under
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  the terms of any one of the MPL, the GPL or the LGPL.
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*/
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using System;
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using System.Collections.Generic;
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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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using System.Threading;
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namespace OpenHardwareMonitor.Hardware.CPU {
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  internal sealed class IntelCPU : Hardware, IHardware {
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    private int processorIndex;
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    private CPUID[][] cpuid;
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    private int coreCount;
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    private string name;
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    private uint family;
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    private uint model;
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    private uint stepping;
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    private Sensor[] coreTemperatures;
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    private Sensor totalLoad;
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    private Sensor[] coreLoads;
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    private Sensor[] coreClocks;
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    private Sensor busClock;    
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    private bool hasTSC;
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    private bool invariantTSC;    
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    private double estimatedMaxClock;
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    private CPULoad cpuLoad;
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    private ulong lastTimeStampCount;    
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    private long lastTime;
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    private uint maxNehalemMultiplier = 0;    
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    private const uint IA32_THERM_STATUS_MSR = 0x019C;
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    private const uint IA32_TEMPERATURE_TARGET = 0x01A2;
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    private const uint IA32_PERF_STATUS = 0x0198;
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    private const uint MSR_PLATFORM_INFO = 0xCE;
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    private string CoreString(int i) {
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      if (coreCount == 1)
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        return "CPU Core";
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      else
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        return "CPU Core #" + (i + 1);
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    }
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    private float[] Floats(float f) {
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      float[] result = new float[coreCount];
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      for (int i = 0; i < coreCount; i++)
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        result[i] = f;
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      return result;
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    }
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    public IntelCPU(int processorIndex, CPUID[][] cpuid, ISettings settings) {
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      this.processorIndex = processorIndex;
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      this.cpuid = cpuid;
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      this.coreCount = cpuid.Length;
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      this.name = cpuid[0][0].Name;
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      this.family = cpuid[0][0].Family;
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      this.model = cpuid[0][0].Model;
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      this.stepping = cpuid[0][0].Stepping;
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      float[] tjMax;
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      switch (family) {
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        case 0x06: {
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            switch (model) {
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              case 0x0F: // Intel Core (65nm)
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                switch (stepping) {
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                  case 0x06: // B2
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                    switch (coreCount) {
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                      case 2:
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                        tjMax = Floats(80 + 10); break;
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                      case 4:
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                        tjMax = Floats(90 + 10); break;
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                      default:
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                        tjMax = Floats(85 + 10); break;
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                    }
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                    tjMax = Floats(80 + 10); break;
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                  case 0x0B: // G0
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                    tjMax = Floats(90 + 10); break;
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                  case 0x0D: // M0
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                    tjMax = Floats(85 + 10); break;
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                  default:
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                    tjMax = Floats(85 + 10); break;
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                } break;
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              case 0x17: // Intel Core (45nm)
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                tjMax = Floats(100); break;
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              case 0x1C: // Intel Atom (45nm)
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                switch (stepping) {
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                  case 0x02: // C0
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                    tjMax = Floats(90); break;
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                  case 0x0A: // A0, B0
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                    tjMax = Floats(100); break;
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                  default:
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                    tjMax = Floats(90); break;
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                } break;                
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              case 0x1A: // Intel Core i7 LGA1366 (45nm)
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              case 0x1E: // Intel Core i5, i7 LGA1156 (45nm)
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              case 0x25: // Intel Core i3, i5, i7 LGA1156 (32nm)
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              case 0x2C: // Intel Core i7 LGA1366 (32nm) 6 Core
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                uint eax, edx;
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                tjMax = new float[coreCount];
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                for (int i = 0; i < coreCount; i++) {
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                  if (WinRing0.RdmsrTx(IA32_TEMPERATURE_TARGET, out eax,
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                    out edx, (UIntPtr)(1L << cpuid[i][0].Thread)))
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                  {
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                    tjMax[i] = (eax >> 16) & 0xFF;
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                  } else {
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                    tjMax[i] = 100;
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                  }
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                }
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                if (WinRing0.Rdmsr(MSR_PLATFORM_INFO, out eax, out edx)) {
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                  maxNehalemMultiplier = (eax >> 8) & 0xff;
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                }
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                break;
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              default:
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                tjMax = Floats(100); break;
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            }
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          } break;
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        default: tjMax = Floats(100); break;
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      }
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      // check if processor supports a digital thermal sensor
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      if (cpuid[0][0].Data.GetLength(0) > 6 && 
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        (cpuid[0][0].Data[6, 0] & 1) != 0) 
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      {
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        coreTemperatures = new Sensor[coreCount];
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        for (int i = 0; i < coreTemperatures.Length; i++) {
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          coreTemperatures[i] = new Sensor(CoreString(i), i,
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            SensorType.Temperature, this, new ParameterDescription[] { 
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              new ParameterDescription(
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                "TjMax [°C]", "TjMax temperature of the core.\n" + 
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                "Temperature = TjMax - TSlope * Value.", tjMax[i]), 
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              new ParameterDescription("TSlope [°C]", 
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                "Temperature slope of the digital thermal sensor.\n" + 
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                "Temperature = TjMax - TSlope * Value.", 1)}, settings);
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          ActivateSensor(coreTemperatures[i]);
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        }
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      } else {
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        coreTemperatures = new Sensor[0];
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      }
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      if (coreCount > 1)
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        totalLoad = new Sensor("CPU Total", 0, SensorType.Load, this, settings);
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      else
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        totalLoad = 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,
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          SensorType.Load, this, settings);     
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      cpuLoad = new CPULoad(cpuid);
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      if (cpuLoad.IsAvailable) {
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        foreach (Sensor sensor in coreLoads)
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          ActivateSensor(sensor);
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        if (totalLoad != null)
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          ActivateSensor(totalLoad);
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      }
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      // check if processor has TSC
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      if (cpuid[0][0].Data.GetLength(0) > 1 
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        && (cpuid[0][0].Data[1, 3] & 0x10) != 0)
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        hasTSC = true;
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      else
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        hasTSC = false; 
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      // check if processor supports invariant TSC 
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      if (cpuid[0][0].ExtData.GetLength(0) > 7 
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        && (cpuid[0][0].ExtData[7, 3] & 0x100) != 0)
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        invariantTSC = true;
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      else
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        invariantTSC = false;
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      // preload the function
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      EstimateMaxClock(0); 
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      EstimateMaxClock(0); 
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      // estimate the max clock in MHz      
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      List<double> estimatedMaxClocks = new List<double>(3);
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      for (int i = 0; i < 3; i++)
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        estimatedMaxClocks.Add(1e-6 * EstimateMaxClock(0.025));
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      estimatedMaxClocks.Sort();
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      estimatedMaxClock = estimatedMaxClocks[1];
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      lastTimeStampCount = 0;
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      lastTime = 0;
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      busClock = new Sensor("Bus Speed", 0, SensorType.Clock, this, settings);      
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      coreClocks = new Sensor[coreCount];
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      for (int i = 0; i < coreClocks.Length; i++) {
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        coreClocks[i] =
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          new Sensor(CoreString(i), i + 1, SensorType.Clock, this, settings);
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        if (hasTSC)
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          ActivateSensor(coreClocks[i]);
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      }
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      Update();                   
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    }
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    public override string Name {
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      get { return name; }
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    }
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    public override Identifier Identifier {
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      get { 
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        return new Identifier("intelcpu", 
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          processorIndex.ToString(CultureInfo.InvariantCulture)); 
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      }
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    }
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    public override HardwareType HardwareType {
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      get { return HardwareType.CPU; }
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    }
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    private static void AppendMSRData(StringBuilder r, uint msr, int thread) {
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      uint eax, edx;
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      if (WinRing0.RdmsrTx(msr, out eax, out edx, (UIntPtr)(1L << thread))) {
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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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    public override string GetReport() {
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      StringBuilder r = new StringBuilder();
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      r.AppendLine("Intel CPU");
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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, 
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        Environment.NewLine);
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      r.AppendFormat("Threads per Core: {0}{1}", cpuid[0].Length,
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        Environment.NewLine);     
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      r.AppendLine("TSC: " + 
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        (hasTSC ? (invariantTSC ? "Invariant" : "Not Invariant") : "None"));
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      r.AppendLine(string.Format(CultureInfo.InvariantCulture, 
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        "Timer Frequency: {0} MHz", Stopwatch.Frequency * 1e-6));
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      r.AppendLine(string.Format(CultureInfo.InvariantCulture,
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        "Max Clock: {0} MHz", Math.Round(estimatedMaxClock * 100) * 0.01));
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      r.AppendLine();
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      for (int i = 0; i < cpuid.Length; i++) {
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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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        AppendMSRData(r, MSR_PLATFORM_INFO, cpuid[i][0].Thread);
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        AppendMSRData(r, IA32_PERF_STATUS, cpuid[i][0].Thread);
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        AppendMSRData(r, IA32_THERM_STATUS_MSR, cpuid[i][0].Thread);
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        AppendMSRData(r, IA32_TEMPERATURE_TARGET, cpuid[i][0].Thread);
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        r.AppendLine();
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      }
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      return r.ToString();
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    }
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    private static double EstimateMaxClock(double timeWindow) {
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      long ticks = (long)(timeWindow * Stopwatch.Frequency);
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      uint lsbBegin, msbBegin, lsbEnd, msbEnd; 
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      Thread.BeginThreadAffinity();
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      long timeBegin = Stopwatch.GetTimestamp() + 
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        (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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      WinRing0.Rdtsc(out lsbBegin, out msbBegin);
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      while (Stopwatch.GetTimestamp() < timeEnd) { }
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      WinRing0.Rdtsc(out lsbEnd, out msbEnd);
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      Thread.EndThreadAffinity();
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      ulong countBegin = ((ulong)msbBegin << 32) | lsbBegin;
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      ulong countEnd = ((ulong)msbEnd << 32) | lsbEnd;
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      return (((double)(countEnd - countBegin)) * Stopwatch.Frequency) / 
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        (timeEnd - timeBegin);
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    }
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    public override void Update() {      
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      for (int i = 0; i < coreTemperatures.Length; i++) {
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        uint eax, edx;
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        if (WinRing0.RdmsrTx(
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          IA32_THERM_STATUS_MSR, out eax, out edx, 
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            (UIntPtr)(1L << cpuid[i][0].Thread))) {
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          // if reading is valid
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          if ((eax & 0x80000000) != 0) {
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            // get the dist from tjMax from bits 22:16
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            float deltaT = ((eax & 0x007F0000) >> 16);
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            float tjMax = coreTemperatures[i].Parameters[0].Value;
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            float tSlope = coreTemperatures[i].Parameters[1].Value;
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            coreTemperatures[i].Value = tjMax - tSlope * deltaT;
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          } else {
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            coreTemperatures[i].Value = null;
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          }
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        }
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      }
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      if (cpuLoad.IsAvailable) {
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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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      if (hasTSC) {
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        uint lsb, msb;
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        WinRing0.RdtscTx(out lsb, out msb, (UIntPtr)1);
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        long time = Stopwatch.GetTimestamp();
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        ulong timeStampCount = ((ulong)msb << 32) | lsb;
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        double delta = ((double)(time - lastTime)) / Stopwatch.Frequency;
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        if (delta > 0.5) {
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          double maxClock;
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          if (invariantTSC)
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            maxClock = (timeStampCount - lastTimeStampCount) / (1e6 * delta);
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          else
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            maxClock = estimatedMaxClock;
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          double newBusClock = 0;
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          uint eax, edx;
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          for (int i = 0; i < coreClocks.Length; i++) {
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            System.Threading.Thread.Sleep(1);
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            if (WinRing0.RdmsrTx(IA32_PERF_STATUS, out eax, out edx,
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              (UIntPtr)(1L << cpuid[i][0].Thread))) {
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              if (maxNehalemMultiplier > 0) { // Core i3, i5, i7
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                uint nehalemMultiplier = eax & 0xff;
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                coreClocks[i].Value =
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                  (float)(nehalemMultiplier * maxClock / maxNehalemMultiplier);
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                newBusClock = (float)(maxClock / maxNehalemMultiplier);
moel@79
   371
              } else { // Core 2
moel@79
   372
                uint multiplier = (eax >> 8) & 0x1f;
moel@79
   373
                uint maxMultiplier = (edx >> 8) & 0x1f;
moel@79
   374
                // factor = multiplier * 2 to handle non integer multipliers 
moel@79
   375
                uint factor = (multiplier << 1) | ((eax >> 14) & 1);
moel@79
   376
                uint maxFactor = (maxMultiplier << 1) | ((edx >> 14) & 1);
moel@79
   377
                if (maxFactor > 0) {
moel@79
   378
                  coreClocks[i].Value = (float)(factor * maxClock / maxFactor);
moel@167
   379
                  newBusClock = (float)(2 * maxClock / maxFactor);
moel@79
   380
                }
moel@46
   381
              }
moel@79
   382
            } else { // Intel Pentium 4
moel@79
   383
              // if IA32_PERF_STATUS is not available, assume maxClock
moel@79
   384
              coreClocks[i].Value = (float)maxClock;
moel@79
   385
            }
moel@79
   386
          }
moel@167
   387
          if (newBusClock > 0) {
moel@167
   388
            this.busClock.Value = (float)newBusClock;
moel@79
   389
            ActivateSensor(this.busClock);
moel@46
   390
          }
moel@44
   391
        }
moel@79
   392
        lastTimeStampCount = timeStampCount;
moel@79
   393
        lastTime = time;
moel@44
   394
      }
moel@46
   395
    }
moel@46
   396
  }  
moel@1
   397
}