On Thu, Jun 01, 2017 at 05:04:27PM +0530, Viresh Kumar wrote: > This patch relocates the call to utilization hook from > update_cfs_rq_load_avg() to task_tick_fair().
That's not right. Consider hardware where 'setting' the DVFS is a 'cheap' MSR write, doing that once every 10ms (HZ=100) is absurd. We spoke about this problem in Pisa, the proposed solution was having each driver provide a cost metric and the generic code doing a max filter over the window constructed from that cost metric.
