moel@26: /*
moel@26:
moel@26: Version: MPL 1.1/GPL 2.0/LGPL 2.1
moel@26:
moel@26: The contents of this file are subject to the Mozilla Public License Version
moel@26: 1.1 (the "License"); you may not use this file except in compliance with
moel@26: the License. You may obtain a copy of the License at
moel@26:
moel@26: http://www.mozilla.org/MPL/
moel@26:
moel@26: Software distributed under the License is distributed on an "AS IS" basis,
moel@26: WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
moel@26: for the specific language governing rights and limitations under the License.
moel@26:
moel@26: The Original Code is the Open Hardware Monitor code.
moel@26:
moel@26: The Initial Developer of the Original Code is
moel@26: Michael Möller <m.moeller@gmx.ch>.
moel@26: Portions created by the Initial Developer are Copyright (C) 2009-2010
moel@26: the Initial Developer. All Rights Reserved.
moel@26:
moel@26: Contributor(s):
moel@26:
moel@26: Alternatively, the contents of this file may be used under the terms of
moel@26: either the GNU General Public License Version 2 or later (the "GPL"), or
moel@26: the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
moel@26: in which case the provisions of the GPL or the LGPL are applicable instead
moel@26: of those above. If you wish to allow use of your version of this file only
moel@26: under the terms of either the GPL or the LGPL, and not to allow others to
moel@26: use your version of this file under the terms of the MPL, indicate your
moel@26: decision by deleting the provisions above and replace them with the notice
moel@26: and other provisions required by the GPL or the LGPL. If you do not delete
moel@26: the provisions above, a recipient may use your version of this file under
moel@26: the terms of any one of the MPL, the GPL or the LGPL.
moel@26:
moel@26: */
moel@26:
moel@26: using System;
moel@26: using System.Collections.Generic;
moel@26: using System.Runtime.InteropServices;
moel@26: using System.Text;
moel@26:
moel@26: namespace OpenHardwareMonitor.Hardware.CPU {
moel@165: internal class CPULoad {
moel@26:
moel@26: [StructLayout(LayoutKind.Sequential)]
moel@26: private struct SystemProcessorPerformanceInformation {
moel@26: public long IdleTime;
moel@26: public long KernelTime;
moel@26: public long UserTime;
moel@26: public long Reserved0;
moel@26: public long Reserved1;
moel@26: public ulong Reserved2;
moel@26: }
moel@26:
moel@26: private enum SystemInformationClass : int {
moel@26: SystemBasicInformation = 0,
moel@26: SystemCpuInformation = 1,
moel@26: SystemPerformanceInformation = 2,
moel@26: SystemTimeOfDayInformation = 3,
moel@26: SystemProcessInformation = 5,
moel@26: SystemProcessorPerformanceInformation = 8
moel@26: }
moel@26:
moel@90: private CPUID[][] cpuid;
moel@26:
moel@26: private long systemTime;
moel@26: private long[] idleTimes;
moel@26:
moel@26: private float totalLoad;
moel@26: private float[] coreLoads;
moel@26:
moel@26: private bool available = false;
moel@26:
moel@167: private static long[] GetIdleTimes() {
moel@26: SystemProcessorPerformanceInformation[] informations = new
moel@99: SystemProcessorPerformanceInformation[64];
moel@99:
moel@99: int size = Marshal.SizeOf(typeof(SystemProcessorPerformanceInformation));
moel@26:
moel@26: IntPtr returnLength;
moel@167: if (NativeMethods.NtQuerySystemInformation(
moel@26: SystemInformationClass.SystemProcessorPerformanceInformation,
moel@167: informations, informations.Length * size, out returnLength) != 0)
moel@167: return null;
moel@99:
moel@99: long[] result = new long[(int)returnLength / size];
moel@26:
moel@26: for (int i = 0; i < result.Length; i++)
moel@26: result[i] = informations[i].IdleTime;
moel@26:
moel@26: return result;
moel@26: }
moel@26:
moel@90: public CPULoad(CPUID[][] cpuid) {
moel@90: this.cpuid = cpuid;
moel@90: this.coreLoads = new float[cpuid.Length];
moel@26: this.systemTime = DateTime.Now.Ticks;
moel@26: this.totalLoad = 0;
moel@26: try {
moel@26: this.idleTimes = GetIdleTimes();
moel@26: } catch (Exception) {
moel@26: this.idleTimes = null;
moel@26: }
moel@26: if (idleTimes != null)
moel@26: available = true;
moel@26: }
moel@26:
moel@26: public bool IsAvailable {
moel@26: get { return available; }
moel@26: }
moel@26:
moel@26: public float GetTotalLoad() {
moel@26: return totalLoad;
moel@26: }
moel@26:
moel@26: public float GetCoreLoad(int core) {
moel@26: return coreLoads[core];
moel@26: }
moel@26:
moel@26: public void Update() {
moel@26: if (this.idleTimes == null)
moel@26: return;
moel@26:
moel@167: long newSystemTime = DateTime.Now.Ticks;
moel@167: long[] newIdleTimes = GetIdleTimes();
moel@26:
moel@167: if (newSystemTime - this.systemTime < 10000)
moel@167: return;
moel@167:
moel@167: if (newIdleTimes == null)
moel@26: return;
moel@26:
moel@26: float total = 0;
moel@90: int count = 0;
moel@90: for (int i = 0; i < cpuid.Length; i++) {
moel@26: float value = 0;
moel@90: for (int j = 0; j < cpuid[i].Length; j++) {
moel@90: long index = cpuid[i][j].Thread;
moel@167: if (index < newIdleTimes.Length) {
moel@167: long delta = newIdleTimes[index] - this.idleTimes[index];
moel@99: value += delta;
moel@99: total += delta;
moel@99: count++;
moel@99: }
moel@26: }
moel@90: value = 1.0f - value / (cpuid[i].Length *
moel@167: (newSystemTime - this.systemTime));
moel@26: value = value < 0 ? 0 : value;
moel@26: coreLoads[i] = value * 100;
moel@26: }
moel@99: if (count > 0) {
moel@167: total = 1.0f - total / (count * (newSystemTime - this.systemTime));
moel@99: total = total < 0 ? 0 : total;
moel@99: } else {
moel@99: total = 0;
moel@99: }
moel@26: this.totalLoad = total * 100;
moel@26:
moel@167: this.systemTime = newSystemTime;
moel@167: this.idleTimes = newIdleTimes;
moel@26: }
moel@26:
moel@167: private static class NativeMethods {
moel@167:
moel@167: [DllImport("ntdll.dll")]
moel@167: public static extern int NtQuerySystemInformation(
moel@167: SystemInformationClass informationClass,
moel@167: [Out] SystemProcessorPerformanceInformation[] informations,
moel@167: int structSize, out IntPtr returnLength);
moel@167: }
moel@26: }
moel@26: }