On 11/18/2015 7:44 AM, Morten Rasmussen wrote:
I would not necessarily want to punish all cpus system-wide if we have local overheating in one corner. If would rather have it apply to only the overheating socket in a multi-socket machine and only the big cores in a big.LITTLE system.
most of the time thermal issues aren't inside the SOC, but on a system level due to cheap heat spreaders or outright lack of space due to thinness. But even if you have one part of the die too hot: For core level idle injection, no need to synchronize that; the reason to synchronize is generally that when ALL cores are idle, additional power savings kick in (like memory going to self refresh, fabrics power gating etc); those additional power savings are what makes this more efficient than just voltage/frequency scaling at the bottom of that range... not so much the fact that things are just idle. -- 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/
