Messages in this thread | | | Date | Sun, 12 Dec 2004 18:50:30 -0700 (MST) | From | Zwane Mwaikambo <> | Subject | Re: dynamic-hz |
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On Mon, 13 Dec 2004, Andrea Arcangeli wrote:
> Sure, desktop doesn't need this, the reason somebody is asking for it, > is that the desktop stuff hurted some other non-desktop usages. Infact > my 2.4 tree was setting by default HZ=1000 if 'desktop' paramter was > passed to the kernel (so that I could lower the timeslice accordingly > too, without losing the effect of the nicelevels between nice 0 and > +19). > > The other new case where I'm asked for this feature is again not the > desktop but the high end laptop with cpu throttling down to 80mhz, and > what Pavel mentioned about the lower consumption. Perhaps we could do > variable HZ there, though I doubt it has a pit that can be reprogrammed > with sane performance.
Well most x86(64) these days have local APICs and that provides a relatively inexpensive one shot timer mode.
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