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Reading TjMax for each core on Intel Core i3/i5/i7 CPUs.

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This commit is contained in:
Michael Möller
2010-03-02 22:26:07 +00:00
parent 97dcca5177
commit 207860b427
1 changed files with 31 additions and 18 deletions
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49
Hardware/CPU/IntelCPU.cs
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@@ -87,6 +87,13 @@ namespace OpenHardwareMonitor.Hardware.CPU {
private static extern bool GetProcessAffinityMask(IntPtr handle, private static extern bool GetProcessAffinityMask(IntPtr handle,
out IntPtr processMask, out IntPtr systemMask); out IntPtr processMask, out IntPtr systemMask);
private float[] Floats(float f) {
float[] result = new float[coreCount];
for (int i = 0; i < coreCount; i++)
result[i] = f;
return result;
}
public IntelCPU(string name, uint family, uint model, uint stepping, public IntelCPU(string name, uint family, uint model, uint stepping,
uint[,] cpuidData, uint[,] cpuidExtData) { uint[,] cpuidData, uint[,] cpuidExtData) {
@@ -146,7 +153,7 @@ namespace OpenHardwareMonitor.Hardware.CPU {
coreCount = logicalProcessors / logicalProcessorsPerCore; coreCount = logicalProcessors / logicalProcessorsPerCore;
float tjMax; float[] tjMax;
switch (family) { switch (family) {
case 0x06: { case 0x06: {
switch (model) { switch (model) {
@@ -155,53 +162,59 @@ namespace OpenHardwareMonitor.Hardware.CPU {
case 0x06: // B2 case 0x06: // B2
switch (coreCount) { switch (coreCount) {
case 2: case 2:
tjMax = 80 + 10; break; tjMax = Floats(80 + 10); break;
case 4: case 4:
tjMax = 90 + 10; break; tjMax = Floats(90 + 10); break;
default: default:
tjMax = 85 + 10; break; tjMax = Floats(85 + 10); break;
} }
tjMax = 80 + 10; break; tjMax = Floats(80 + 10); break;
case 0x0B: // G0 case 0x0B: // G0
tjMax = 90 + 10; break; tjMax = Floats(90 + 10); break;
case 0x0D: // M0 case 0x0D: // M0
tjMax = 85 + 10; break; tjMax = Floats(85 + 10); break;
default: default:
tjMax = 85 + 10; break; tjMax = Floats(85 + 10); break;
} break; } break;
case 0x17: // Intel Core (45nm) case 0x17: // Intel Core (45nm)
tjMax = 100; break; tjMax = Floats(100); break;
case 0x1C: // Intel Atom case 0x1C: // Intel Atom
tjMax = 90; break; tjMax = Floats(90); break;
case 0x1A: // Intel Core i7 LGA1366 (45nm) case 0x1A: // Intel Core i7 LGA1366 (45nm)
case 0x1E: // Intel Core i5, i7 LGA1156 (45nm) case 0x1E: // Intel Core i5, i7 LGA1156 (45nm)
case 0x25: // Intel Core i3, i5, i7 LGA1156 (32nm) case 0x25: // Intel Core i3, i5, i7 LGA1156 (32nm)
uint eax, edx; uint eax, edx;
if (WinRing0.Rdmsr(IA32_TEMPERATURE_TARGET, out eax, out edx)) { tjMax = new float[coreCount];
tjMax = (eax >> 16) & 0xFF; for (int i = 0; i < coreCount; i++) {
} else { if (WinRing0.RdmsrTx(IA32_TEMPERATURE_TARGET, out eax,
tjMax = 100; out edx, (UIntPtr)(
1 << (int)(logicalProcessorsPerCore * i))))
{
tjMax[i] = (eax >> 16) & 0xFF;
} else {
tjMax[i] = 100;
}
} }
if (WinRing0.Rdmsr(MSR_PLATFORM_INFO, out eax, out edx)) { if (WinRing0.Rdmsr(MSR_PLATFORM_INFO, out eax, out edx)) {
maxNehalemMultiplier = (eax >> 8) & 0xff; maxNehalemMultiplier = (eax >> 8) & 0xff;
} }
break; break;
default: default:
tjMax = 100; break; tjMax = Floats(100); break;
} }
} break; } break;
default: tjMax = 100; break; default: tjMax = Floats(100); break;
} }
// check if processor supports a digital thermal sensor // check if processor supports a digital thermal sensor
if (cpuidData.GetLength(0) > 6 && (cpuidData[6, 0] & 1) != 0) { if (cpuidData.GetLength(0) > 6 && (cpuidData[6, 0] & 1) != 0) {
coreTemperatures = new Sensor[coreCount]; coreTemperatures = new Sensor[coreCount];
for (int i = 0; i < coreTemperatures.Length; i++) { for (int i = 0; i < coreTemperatures.Length; i++) {
coreTemperatures[i] = new Sensor(CoreString(i), i, tjMax, coreTemperatures[i] = new Sensor(CoreString(i), i, tjMax[i],
SensorType.Temperature, this, new ParameterDescription[] { SensorType.Temperature, this, new ParameterDescription[] {
new ParameterDescription( new ParameterDescription(
"TjMax", "TjMax temperature of the core.\n" + "TjMax", "TjMax temperature of the core.\n" +
"Temperature = TjMax - TSlope * Value.", tjMax), "Temperature = TjMax - TSlope * Value.", tjMax[i]),
new ParameterDescription( new ParameterDescription(
"TSlope", "Temperature slope of the digital thermal sensor.\n" + "TSlope", "Temperature slope of the digital thermal sensor.\n" +
"Temperature = TjMax - TSlope * Value.", 1)}); "Temperature = TjMax - TSlope * Value.", 1)});