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Wake-on-LAN (WoL or WOL) is an Ethernet or Token Ring computer networking standard that allows a computer to be turned on or awakened from sleep mode by a network message. It is based upon AMD 's Magic Packet Technology , which was co-developed by AMD and Hewlett-Packard, following its proposal as a standard in 1995.
Many operating systems, for example Windows, [1] Linux, [2] and macOS [3] will run an idle task, which is a special task loaded by the OS scheduler on a CPU when there is nothing for the CPU to do. The idle task can be hard-coded into the scheduler, or it can be implemented as a separate task with the lowest possible priority.
Advanced Configuration and Power Interface (ACPI) is an open standard that operating systems can use to discover and configure computer hardware components, to perform power management (e.g. putting unused hardware components to sleep), auto configuration (e.g. Plug and Play and hot swapping), and status monitoring.
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 fifth-generation iPad Mini (stylized and marketed as iPad mini [2] and colloquially referred to as iPad Mini 5 [3]) is a tablet computer in the iPad Mini line, developed and marketed by Apple Inc. Announced in a press release along with the third-generation iPad Air on March 18, 2019 and released the same day. [4]
The current version of iPadOS, iPadOS 16, is supported on iPad Mini 5 and up. The upgrade to this version is available as a free download. [citation needed] The first-generation iPad Mini shipped with iOS 6.0 [21] and the highest supported version is iOS 9.3.6 (for cellular models) or iOS 9.3.5 (for Wi-Fi models).
The sixth-generation iPad Mini (stylized and marketed as iPad mini and colloquially referred to as iPad Mini 6) is a tablet computer in the iPad Mini line, developed and marketed by Apple Inc. It was announced on September 14, 2021, and released on September 24, 2021, alongside the ninth-generation iPad , iPhone 13 and iPhone 13 Pro .
It is mostly used by device drivers waiting for disk or network IO (input/output). When the process is sleeping uninterruptibly, signals accumulated during the sleep will be noticed when the process returns from the system call or trap. In Unix-like systems the command 'ps -l' uses code "D" for the uninterruptible sleep state of a process. [9]