On Tue, Apr 17, 2007 at 04:00:53PM -0700, Michael K. Edwards wrote: > Works, that is, right up until you add nonlinear interactions with CPU > speed scaling. From my perspective as an embedded platform > integrator, clock/voltage scaling is the elephant in the scheduler's > living room. Patch in DPM (now OpPoint?) to scale the clock based on > what task is being scheduled, and suddenly the dynamic priority > calculations go wild. Nip this in the bud by putting an RT priority > on the relevant threads (which you have to do anyway if you need > remotely audio-grade latency), and the lock affinity heuristics break, > so you have to hand-tune all the thread priorities. Blecch. [...not terribly enlightening stuff trimmed...] The ongoing scheduler work is on a much more basic level than these affairs I'm guessing you googled. When the basics work as intended it will be possible to move on to more advanced issues. -- wli - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] 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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