Messages in this thread | | | Date | Mon, 12 Mar 2007 11:58:26 +0100 | From | Andi Kleen <> | Subject | Re: [patch] change futex_wait() to hrtimers |
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On Mon, Mar 12, 2007 at 12:00:20PM +0100, Thomas Gleixner wrote: > On Mon, 2007-03-12 at 12:27 +0100, Andi Kleen wrote: > > Ingo Molnar <mingo@elte.hu> writes: > > > > > > the only correct approach is the use of hrtimers, and a patch exists for > > > that - see below. This has been included in -rt for quite some time. > > > > But isn't that bad for power management? You'll likely get more > > idle wakeups, won't you? > > Why so ? It comes more precise, but only once.
When it's clustered around the jiffies interval then wakeups from multiple processes will be somewhat batched. With a precise wakeup you'll get wakeups all over the jiffies period, won't you?
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