Vincent, On 27 March 2015 at 23:37, Vincent Guittot <[email protected]> wrote: > On 27 March 2015 at 16:12, Xunlei Pang <[email protected]> wrote: >>> +static int get_cpu_usage(int cpu) >>> +{ >>> + unsigned long usage = cpu_rq(cpu)->cfs.utilization_load_avg; >>> + unsigned long capacity = capacity_orig_of(cpu); >>> + >>> + if (usage >= SCHED_LOAD_SCALE) >>> + return capacity; >> >> Can "capacity" be greater than SCHED_LOAD_SCALE? >> Why use SCHED_LOAD_SCALE instead of "capacity" in this judgement? > > Yes, SCHED_LOAD_SCALE is the default value but the capacity can be in > the range [1536:512] for arm as an example
Right, I was confused between cpu capacity and arch_scale_freq_capacity() in "Patch 04" then. Thanks. -Xunlei -- 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/
