On Tue, 22 Dec 2009 20:48:24 +0100 Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote: > On Mon, 2009-12-14 at 16:19 -0800, Arjan van de Ven wrote: > > > I like the general idea, I have one request (that I didn't see > > quite in your explanation): Please make sure that all cpus in the > > system do their idle injection at the same time, so that memory can > > go into power saving mode as well during this time etc etc... > > And then you're going to ask that it scales too, right? :-) > > Gang-scheduling is inherently non scalable, be it for idle time or > not. well... there's many ways to do this... one option is to agree, ahead of time, which jiffies values you're going to do the idle thing on. Say every 100 jiffies where jiffies % 100 is 0.... then the scalability thing isn't a big deal.. and you still do it all at the same time. Or at least "enough" at the same time for it to not matter -- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
