linux-kernel - Re: [PATCH v6 5/6] sched: replace capacity

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Message-ID: <54257178.8010900@arm.com>
Date:	Fri, 26 Sep 2014 15:00:24 +0100
From:	Dietmar Eggemann <dietmar.eggemann@....com>
To:	Vincent Guittot <vincent.guittot@...aro.org>
CC:	"peterz@...radead.org" <peterz@...radead.org>,
	"mingo@...nel.org" <mingo@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"preeti@...ux.vnet.ibm.com" <preeti@...ux.vnet.ibm.com>,
	"linux@....linux.org.uk" <linux@....linux.org.uk>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"riel@...hat.com" <riel@...hat.com>,
	Morten Rasmussen <Morten.Rasmussen@....com>,
	"efault@....de" <efault@....de>,
	"nicolas.pitre@...aro.org" <nicolas.pitre@...aro.org>,
	"linaro-kernel@...ts.linaro.org" <linaro-kernel@...ts.linaro.org>,
	"daniel.lezcano@...aro.org" <daniel.lezcano@...aro.org>,
	"pjt@...gle.com" <pjt@...gle.com>,
	"bsegall@...gle.com" <bsegall@...gle.com>
Subject: Re: [PATCH v6 5/6] sched: replace capacity_factor by usage

On 26/09/14 13:39, Vincent Guittot wrote:
> On 25 September 2014 21:19, Dietmar Eggemann <dietmar.eggemann@....com> wrote:
>> On 25/09/14 09:35, Vincent Guittot wrote:
> 
> [snip]
> 
>>>>
>>>> In case sgs->group_type is group_overloaded you could set
>>>> sgs->group_out_of_capacity to 1 without calling group_is_overloaded again.
>>>
>>> I prefer to keep sgs->group_out_of_capacity = group_is_overloaded(sgs,
>>> env) and use it in group_classify in case of future changes in the
>>> classification order
>>
>> Ok, but than group_is_overloaded is called twice at the end of
>> update_sg_lb_stats with exactly the same result. Looks weird in my traces.
> 
> sorry i don't catch your point.
> group_is_overloaded() is called once for group_out_of_capacity which
> is then used in group_classify so it should be called only once

You're right, I made a mistake in my local setup while replacing this
patch with the new version. Problem doesn't exist any more.

> 
>>
>>>
>> [...]
>>
>>
> 


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