On Thursday 20 September 2007, David Baron wrote: > Question is: How does ticklessness effect audio? Realtime-preemptive > kernels? Other multimedia?
Not negative, more likely positive as the timer is programmed with the specific timeout until the next event. In periodic mode there is a slack factor of half the period, that is the scheduler could be called half the timer period too late. A one-shot timer will be programmed to trigger at the exact point in time when the event is planned. You can compare this with wakeing up yourself every Minute on the morning to look if you have to get at 7am. When you are look at 6:59:30 the last time then you will note that it is time to get up at 7:00:30, that are 30 seconds too late. But you could program a one-shot timer at 6:59:30 for 30 seconds which would trigger at exactly 7:00:00. You could increase the precision with periodic timers by decreasing the interval, say you check every 10 seconds, then you are at most 9 seconds too late. But this is more effort. It is better to program a one-shot timer at 0:00am for 7 hours to get woken up at exactly 7:00am. And if a new event has to be inserted before the one-shot timer triggers, then the timer has just to be reprogrammed. Note, that for my understanding, the Linux kernel normally works in periodic mode and switches to one-shot mode when the system is idle for an amount of time. Kind regards, Frank -- Dr.-Ing. Frank Mehnert innotek GmbH, http://www.innotek.de
signature.asc
Description: This is a digitally signed message part.
_______________________________________________ vbox-users mailing list [email protected] http://vbox.innotek.de/mailman/listinfo/vbox-users
