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Ben Greear wrote: > Arjan van de Ven wrote: > >> HZ may not exist. At all; people are trying to remove it. And userspace >> has no business knowing about it either. > > > It can be helpful to know what HZ you are running at, for instance if > you care > very much about the (average) precision of a select/poll timeout. > Will knowing it help? You may find out that you don't have much precision, but then theres nothing to do about it. And there may not even be a HZ, as mentioned. Less cpu is used if there is no periodic interrupts when there is nothing to do. People are trying to *not* have a regular timer interrupt; instead, a one-shot timer can be programmed for the next necessary timeout which may very well be quite a few "ticks" into the future. In this case there is no notion of HZ at all. Helge Hafting - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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