linux kernel timers : 4 options
quoted from :Porfessional linux kernel architecture by Wolfgang Mauerer
page 896-897.
1. High resolution dynamic ticks
2. High resolution periodic ticks
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3. Low resolution dynamic ticks
4. Low resolution periodic ticks.
As the time base for timers, the kernel uses the timer interrupt of the processor or any other suitable periodic source.
On IA-32 and AMD 64 systems, (i) the programmable interrupt timer (PIT) or
(ii) the High Precision Event Timer (HPET) can be employed for this purpose.
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