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Idle is a state that a computer processor is in when it is not being used by any program. Every program or task that runs on a computer system occupies a certain amount of processing time on the CPU. If the CPU has completed all tasks it is idle. Modern processors use idle time to save power.
However, the idle process does not use up computer resources (even when stated to be running at a high percent). Its CPU time "usage" is a measure of how much CPU time is not being used by other threads. In Windows 2000 and later the threads in the System Idle Process are also used to implement CPU power saving.
The computer is running and the CPU executes instructions. "Away mode" is a subset of S0, where monitor is off but background tasks are running. G1 Sleeping S0ix Modern Standby, [34] or "Low Power S0 Idle". Partial processor SoC sleep. [35] [36] Sub states include S0i1, S0i2 and S0i3. Known to ARM and x86 devices. S1
A Windows service must conform to the interface rules and protocols of the Service Control Manager, the component responsible for managing Windows services. [6] Windows services can be configured to start when the operating system starts, and to run in the background as long as Windows runs. Alternatively, they can be started manually or by an ...
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The researchers collected sleep data using a questionnaire and a home-based sleep study (polysomnographic evaluation). In addition, the researchers measured the daytime blood pressure of the ...
One form of dementia—called vascular dementia—is caused by regular small strokes, he points out. “Fluctuating cholesterol levels may therefore cause fluctuating risk for strokes,” Segil says.
ACPI 1.0 (1996) defines a way for a CPU to go to idle "C states", but defines no frequency-scaling system. ACPI 2.0 (2000) introduces a system of P states (power-performance states) that a processor can use to communicate its possible frequency–power settings to the OS. The operating system then sets the speed as needed by switching between ...