Timer coalescing
From Infogalactic: the planetary knowledge core
Timer coalescing is a computer system energy-saving technique that reduces central processing unit (CPU) power consumption by reducing the precision of software timers to allow the synchronization of process wake-ups, minimizing the number of times the CPU is forced to perform the relatively power-costly operation of entering and exiting idle states.[1]
- 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]
See also
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- Advanced Configuration and Power Interface (ACPI)
- Advanced Programmable Interrupt Controller (APIC)
- CPU tick — and tickless kernels
- FreeRTOS
- High Precision Event Timer (HPET)
- HLT (x86 instruction)
- Interrupt coalescing
- Interrupt service routine
- Low-power electronics
- Performance per watt
- Programmable interval timer
- Real-time clock (RTC)
- System clock
- Time Stamp Counter (TSC)
- Tickless kernel
References
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