Sleep (system call)

About: Sleep (system call) is a research topic. Over the lifetime, 2633 publications have been published within this topic receiving 27806 citations. The topic is also known as: Sleep() & sleep().

Hardware automatic performance state transitions in system on processor sleep and wake events

Abstract: In an embodiment, a power management unit (PMU) may automatically transition (in hardware) the performance states of one or more performance domains in a system. The target performance states to which the performance domains are to transition may be programmable in the PMU by software, and software may signal the PMU that a processor in the system is to enter the sleep state. The PMU may control the transition of the performance domains to the target performance states, and may cause the processor to enter the sleep state. In an embodiment, the PMU may be programmable with a second set of target performance states to which the performance domains are to transition when the processor exits the sleep state. The PMU may control the transition of the performance domains to the second targeted performance states and cause the processor to exit the sleep state.

Sleep apnea treatment apparatus with reset circuitry

Abstract: Improved methodology and apparatus for the clinical study and treatment of sleep apnea which incorporates one or more of the following features: (1) application of mono-level, alternating high and low level, or variable positive airway pressure generally within the airway of the patient with the mono-level, high and low level, or variable airway pressure generally being coordinated with and/or responsive to the spontaneous respiration of the patient, (2) usage of adjustably programmable pressure ramp circuitry capable of producing multiple pressure ramp cycles of predetermined duration and pattern whereby the ramp cycles may be customized to accommodate the specific needs of an individual sleep apnea patient so as to ease the patient's transition from wakefulness to sleep, (3) remote control or patient-sensed operation of the apparatus, (4) employment of safety circuitry, reset circuitry and minimum system leak assurance circuitry, controls and methods, and (5) utilization of clinical control circuitry whereby sleep disorder data may be compiled and appropriate therapy implemented during a one-night sleep study.

Method and device for managing application program processes

Abstract: The invention discloses a method and device for managing application program processes. The method includes: a receiving system broadcasts a message to determine whether the screen of a terminal is closed or not; when the screen is closed, the process information objects of operating application programs are acquired through an application program calling interface, and the importance attribute numerical values are acquired through the process information objects of the operating application programs so as to determine the process priority of each application program; the processes with low priority are closed or set into a sleep state according to preset process managing rules. The method has the advantages that the processes with low priority are closed or set into the sleep state according to the priority of the processes, the processes with low priority are set into sleep preferably after screen locking, and accordingly internal memory space is saved, and power consumption is reduced.

Automatic user device presence registration system

Abstract: A user device (18) automatically sends a presence message to a presence server (12) when the user device (18) is powered on. Thereafter, the user device (18) may send a sleep message to the presence server (12) upon power down or prolonged period of inactivity, or the device (18) may be required to send periodic messages to the presence server (12) to maintain it as being listed as an active device. The presence server (12) is then used to manage communication with the user device (18) based on the presence information.