Phoronix: Adaptive Tickless Linux Kernel Support Status

Back in 2007 (the Linux 2.6.21 days) the mainline Linux kernel received tickless idle support. With the system idling, the timer tick no longer needlessly goes off with the "NOHZ" feature. Being worked on since last year is now adaptive tickless support, which extends the tickless functionality to non-idle cases...

http://www.phoronix.com/vr.php?view=MTA0NDc