Messages in this thread | | | Date | Tue, 02 Oct 2007 15:39:19 -0700 | From | Arjan van de Ven <> | Subject | Re: PROBLEM: high load average when idle |
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Linus Torvalds wrote: > > I wonder if the whole "round_jiffies()" thing should be written so that it > never rounds down, or at least never rounds down to before the current > second!
that's what it is supposed to do already...
166 167 if (j <= jiffies) /* rounding ate our timeout entirely; */ 168 return original; 169 return j; 170 }
so there is always a gap of at least 1 jiffie no matter what
> > I have to say, I also think it's a bit iffy to do "round_jiffies()" at all > in that per-CPU kind of way. The "per-cpu" thing is quite possibly going > to change by the time we actually add the timer, so the goal of trying to > get wakeups to happen in "bunches" per CPU should really be done by > setting a flag on the timer itself - so that we could do that rounding > when the timer is actually added to the per-cpu queues!
it's pretty much the same thing though - 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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