On 08/12/2013 06:32 PM, Sören Brinkmann wrote: > On Mon, Aug 12, 2013 at 09:20:19AM -0700, Stephen Boyd wrote: >> On 08/12/13 09:03, Sören Brinkmann wrote: >>> On Fri, Aug 09, 2013 at 10:27:57AM -0700, Stephen Boyd wrote: >>>> On 08/09, Daniel Lezcano wrote: >>>>> yes, but at least the broadcast mechanism should send an IPI to cpu0 to >>>>> wake it up, no ? As Stephen stated this kind of configuration should has >>>>> never been tested before so the tick broadcast code is not handling this >>>>> case properly IMHO. >>>>> >>>> If you have a per-cpu tick device that isn't suffering from >>>> FEAT_C3_STOP why wouldn't you use that for the tick versus a >>>> per-cpu tick device that has FEAT_C3_STOP? It sounds like there >>>> is a bug in the preference logic or you should boost the rating >>>> of the arm global timer above the twd. Does this patch help? It >>>> should make the arm global timer the tick device and whatever the >>>> cadence timer you have into the broadcast device. >>> I finally got to test your patch. Unfortunately, it makes the system >>> hang even earlier: >> >> Sorry it had a bug depending on the registration order. Can you try this >> one (tabs are probably spaces, sorry)? I will go read through this >> thread to see if we already covered the registration order. > > That did it! Booted straight into the system.
Good news :) > The broadcast device is > the TTC instead of GT, now. > > Tick Device: mode: 1 > Broadcast device > Clock Event Device: ttc_clockevent > max_delta_ns: 1207932479 > min_delta_ns: 18432 > mult: 233015 > shift: 32 > mode: 1 > next_event: 9223372036854775807 nsecs > set_next_event: ttc_set_next_event > set_mode: ttc_set_mode > event_handler: tick_handle_oneshot_broadcast > retries: 0 > > tick_broadcast_mask: 00000000 > tick_broadcast_oneshot_mask: 00000000 At the first glance, the timer broadcast usage is not set, right ? Can you try with the cpuidle flag even if it is not needed ? Thanks -- Daniel -- <http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs Follow Linaro: <http://www.facebook.com/pages/Linaro> Facebook | <http://twitter.com/#!/linaroorg> Twitter | <http://www.linaro.org/linaro-blog/> Blog -- 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/
