On Mon, Nov 09, 2015 at 01:23:04PM -0800, Jacob Pan wrote: > what is WFI?
Wait For Interrupt; very like the x86 HLT thing. > For Intel, idle states are hints to the HW. The FW decides how far the > idle can go based on many factors, device states included, some are > visible to the OS some are not. We just to help mature such deep idle > conditions. On some ARM you have to manually orchestrate cluster idle, which is clustered idle states in cpuidle. The up-side is that you explicitly know about them, the down side is that its cross CPU bits and a freak show (think doing cross CPU atomics while a CPU isn't in the coherency domain yet). -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
