On Fri, Aug 16, 2013 at 07:12:09PM +0200, Frederic Weisbecker wrote:Or may be Peter could tell us as well. Peter, do you have a preference?
Still trying to wrap my head around it, but conceptually
get_cpu_iowait_time_us() doesn't make any kind of sense. iowait isn't
per cpu since effectively tasks that aren't running aren't assigned a
cpu (as Oleg already pointed out).
The fact that cpufreq 'needs' this just means that cpufreq is broken --
but I think I've said as much previously; cpufreq needs to stop living
in the partitioned-mp era and get dragged (kicking and screaming) into
the smp era.
I'm also not entirely clear on the 'desired' semantics here. Do we count
iowait time as idle or not?