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A watchdog timer (WDT, or simply a watchdog), sometimes called a computer operating properly timer (COP timer), [1] is an electronic or software timer that is used to detect and recover from computer malfunctions. Watchdog timers are widely used in computers to facilitate automatic correction of temporary hardware faults, and to prevent errant ...
It uses a bash script resident in memory based watchdog timer that cycles a loop through the boot device (i.e., the flash drive) three times a second to see if it is still mounted and reboots the computer if it is not. [10]
The High Precision Event Timer (HPET) is a hardware timer available in modern x86-compatible personal computers. Compared to older types of timers available in the x86 architecture, HPET allows more efficient processing of highly timing-sensitive applications, such as multimedia playback and OS task switching .
Following its integrated approach, systemd also provides replacements for various daemons and utilities, including the startup shell scripts, pm-utils, inetd, acpid, syslog, watchdog, cron and atd. systemd's core components include: systemd is a system and service manager for Linux operating systems.
3.11.10 [242] Greg Kroah-Hartman November 2013 [242] zswap support [243] Canonical provided extended support until August 2014. [192] Named Linux for Workgroups after the 20 years of Windows 3.11 [244] 3.10 30 June 2013 [245] 3.10.108 [246] Willy Tarreau [1] [247] (formerly Greg Kroah-Hartman) November 2017 [246] bcache support [248]
time — Run command line and report real, user, and system time elapsed in seconds. timeout — Run command line as a child process, sending child a signal if the command doesn't exit soon enough. top — Show process activity in real time. touch — Update the access and modification times of each FILE to the current time. true — Return zero.
In spacecraft, a Command-Loss Timer (CLT) is a software timer within the command and data system (CDS) which is restarted every time the spacecraft receives a command from Earth. [1] If the CLT times out , it is assumed that the spacecraft's receiver has failed to reliably receive messages and, in response, the CDS will attempt to restore ...
The Linux kernel gained support for deferrable timers in 2.6.22, [2] [3] and controllable "timer slack" for threads in 2.6.28 allowing timer coalescing. [4] [5] Timer coalescing has been a feature of Microsoft Windows from Windows 7 onward. [6] Apple's XNU kernel based OS X gained support as of OS X Mavericks. [7] [8] FreeBSD supports it since ...