Re: [PATCH 1/2] sched: cpufreq: ignore SMT when determining max cpu capacity

On Wed, Aug 31, 2016 at 03:27:30AM +0200, Rafael J. Wysocki wrote:

On Friday, August 26, 2016 11:40:47 AM Steve Muckle wrote:

quoted

PELT does not consider SMT when scaling its utilization values via
arch_scale_cpu_capacity(). The value in rq->cpu_capacity_orig does
take SMT into consideration though and therefore may be smaller than
the utilization reported by PELT.

On an Intel i7-3630QM for example rq->cpu_capacity_orig is 589 but
util_avg scales up to 1024. This means that a 50% utilized CPU will show
up in schedutil as ~86% busy.

Fix this by using the same CPU scaling value in schedutil as that which
is used by PELT.

Signed-off-by: Steve Muckle <redacted>

This is fine by me.

Peter, any objections?

No, looks good. Thanks