linux-kernel - Re: [PATCH v3 linux-next] cpufreq: ondemand: Calculate gradient of CPU load to early increase frequency

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Date:	Fri, 22 Feb 2013 11:27:09 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Stratos Karafotis <stratosk@...aphore.gr>
Cc:	cpufreq@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 linux-next] cpufreq: ondemand: Calculate gradient of
 CPU load to early increase frequency

On Fri, Feb 22, 2013 at 7:26 AM, Viresh Kumar <viresh.kumar@...aro.org> wrote:
> On 21 February 2013 23:09, Stratos Karafotis <stratosk@...aphore.gr> wrote:

>> Instead of checking only the absolute value of CPU load_freq to increase
>> frequency, we detect forthcoming CPU load rise and increase frequency
>> earlier.
>>
>> Every sampling rate, we calculate the gradient of load_freq. If it is
>> too steep we assume that the load most probably will go over
>> up_threshold in next iteration(s) and we increase frequency immediately.
>>
>> New tuners are introduced:
>> - early_demand: to enable this functionality (disabled by default).
>> - grad_up_threshold: over this gradient of load we will increase
>> frequency immediately.
>>
>> Signed-off-by: Stratos Karafotis <stratosk@...aphore.gr>
>
> Acked-by: Viresh Kumar <viresh.kumar@...aro.org>

Rafael,

I applied it here with my Ack over my patches, for getting a run by
"kbuild test robot".

http://git.linaro.org/gitweb?p=people/vireshk/linux.git;a=shortlog;h=refs/heads/cpufreq-for-3.10
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