linux-kernel - Re: [PATCH v2 1/6] sched/fair.c: remove "power" from struct numa

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Message-ID: <alpine.LFD.2.11.1405262315210.17310@knanqh.ubzr>
Date:	Mon, 26 May 2014 23:18:08 -0400 (EDT)
From:	Nicolas Pitre <nicolas.pitre@...aro.org>
To:	Mike Galbraith <umgwanakikbuti@...il.com>
cc:	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Morten Rasmussen <morten.rasmussen@....com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	linux-kernel@...r.kernel.org, linaro-kernel@...ts.linaro.org
Subject: Re: [PATCH v2 1/6] sched/fair.c: remove "power" from struct
 numa_stats

On Tue, 27 May 2014, Mike Galbraith wrote:

> On Mon, 2014-05-26 at 18:19 -0400, Nicolas Pitre wrote: 
> > 
> > @@ -1046,7 +1046,7 @@ static void update_numa_stats(struct numa_stats *ns, int nid)
> >  
> >  		ns->nr_running += rq->nr_running;
> >  		ns->load += weighted_cpuload(cpu);
> > -		ns->power += power_of(cpu);
> > +		ns->compute_capacity += power_of(cpu);
> 
> power_of(cpu) as a capacity input looks odd now.. 
> 
> > @@ -1062,9 +1062,10 @@ static void update_numa_stats(struct numa_stats *ns, int nid)
> >  	if (!cpus)
> >  		return;
> >  
> > -	ns->load = (ns->load * SCHED_POWER_SCALE) / ns->power;
> > -	ns->capacity = DIV_ROUND_CLOSEST(ns->power, SCHED_POWER_SCALE);
> > -	ns->has_capacity = (ns->nr_running < ns->capacity);
> > +	ns->load = (ns->load * SCHED_POWER_SCALE) / ns->compute_capacity;
> > +	ns->task_capacity =
> > +		DIV_ROUND_CLOSEST(ns->compute_capacity, SCHED_POWER_SCALE);
> 
> ..as do SCHED_POWER_SCALE, update_cpu_power() etc.

The rest is renamed in a later patch.  I wanted to split it into 
multiple patches to keep those changes manageable.


Nicolas
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