On Mon, 4 Jan 2010 05:49:05 -0500 "Youquan,Song" <youquan.song@xxxxxxxxxxxxxxx> wrote: > Tickless is disabled by nohz=off, which is used in OSVs. it is? I doubt anyone wants to normally disable tickless, the power cost is just too high.... > But in > current kernel, if tickless is disabled, the timer irq0 will not > increase. why is this a problem? > Because the timer event handler should be > tick_handle_periodic, but actually event handler keep as > tick_handle_oneshot_broadcast which is used in tickless. The root > cause is that it is default to enable high resolution timer which > will force to oneshot broadcast mode. using local apic in one shot mode is not a problem, I'd in fact call it a feature... -- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
