Kernel Timer Systems - eLinux.org
Timer Wheel, Jiffies and HZ (or, the way it was) ... For standard resolution (at jiffy resolution), a clock will have a value for it's '.resolution' field equal to the period of a jiffy. For embedded machines, where HZ is typically 100, this will be 10 milliseconds, or 10000000 (ten million) nanoseconds. ...
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