On 03/21/2013 06:27 PM, Preeti U Murthy wrote: >> > did you close all of background system services? >> > In theory the rq->avg.runnable_avg_sum should be zero if there is no >> > task a bit long, otherwise there are some bugs in kernel. > Could you explain why rq->avg.runnable_avg_sum should be zero? What if > some kernel thread ran on this run queue and is now finished? Its > utilisation would be say x.How would that ever drop to 0,even if nothing > ran on it later?
the value get from decay_load(): sa->runnable_avg_sum = decay_load(sa->runnable_avg_sum, in decay_load it is possible to be set zero. and /proc/sched_debug also approve this: .tg_runnable_contrib : 0 .tg->runnable_avg : 50 .avg->runnable_avg_sum : 0 .avg->runnable_avg_period : 47507 -- Thanks Alex -- 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/
