Windows - CPU power management APIs
What APIs are provided by Windows for CPU pow开发者_如何学JAVAer management (I'm interested in CPU frequency scaling, setting min and max CPU frequency - similar to what you can do in Control Panel in power plans, but in a programmatic way). I'm also interested in .Net APIs. (It is not something I intend to use in a production environment, but rather as a proof of concept for some dynamic power management algorithms)
The C++ Power Management APIs: http://msdn.microsoft.com/en-us/library/aa373170.aspx
.NET Power Management APIs are in the Microsoft.Win32
namespace.
Example from http://msdn.microsoft.com/en-us/library/hxkc1kwd.aspx:
private void powerModeChanged(System.Object sender, Microsoft.Win32.PowerModeChangedEventArgs e)
{
int si = SystemInformation.PowerStatus;
switch (si)
{
case BatteryChargeStatus.Low:
MessageBox.Show("Battery is running low", MessageBoxIcon.Exclamation);
case BatteryChargeStatus.Low:
MessageBox.Show("Battery is critically low", MessageBoxIcon.Stop);
Default:
// Battery is okay.
}
}
You can find lots more by poking around in that namespace.
Have you tried digging in the power-management API ?
Have you checked the WMI way ? The Win32_Processor class provides a lot of informations like LoadPercentage, PowerManagementCapabilities...
http://msdn.microsoft.com/en-us/library/aa394373%28VS.85%29.aspx
WMI Reference : http://msdn.microsoft.com/en-us/library/aa394572%28VS.85%29.aspx
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