Messages in this thread | | | Subject | Re: No 100 HZ timer ! | Date | Mon, 9 Apr 2001 23:35:44 +0100 (BST) | From | Alan Cox <> |
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> > Its worth doing even on the ancient x86 boards with the PIT. > > Note that programming the PIT is sloooooooow and doing it on every timer > add_timer/del_timer would be a pain.
You only have to do it occasionally.
When you add a timer newer than the current one (arguably newer by at least 1/2*HZ sec) When you finish running the timers at an interval and the new interval is significantly larger than the current one.
Remember each tick we poke the PIT anyway
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