2.2. Tickless support for x86-64, PPC, UML, ARM, MIPS
The Tickless feature was added in Linux 2.6.21. This feature allows the kernel to disable timer interrupts for longer, variable periods, saving some power and improving performance, especially in virtual guests. 2.6.24 adds tickless support to the widespread 64-bit x86 architecture, but also to PPC, the virtualized architecture UML, and some variants of ARM and MIPS. They join the already tickless supported x86-32, SPARC-64 and SH.
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