linux-kernel - Re: [PATCH] cpufreq: ondemand: Set MIN_FREQUENCY_UP

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Date:	Mon, 4 Jan 2016 11:26:51 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Chen Yu <yu.c.chen@...el.com>
Cc:	linux-pm@...r.kernel.org, rjw@...ysocki.net,
	linux-kernel@...r.kernel.org, sworddragon2@....com
Subject: Re: [PATCH] cpufreq: ondemand: Set MIN_FREQUENCY_UP_THRESHOLD to 1

On 04-01-16, 12:14, Chen Yu wrote:
> Currently the minimal up_threshold is 11, and user may want to
> use a smaller minimal up_threshold for performance tuning,
> so MIN_FREQUENCY_UP_THRESHOLD could be set to 1 because:
> 
> 1. Current systems wouldn't be affected as they have already
>    a value >= 11.
> 2. New systems with a default kernel would keep still the default
>    value that is >= 11.
> 
> Users now have the advantage that they can make their own decisions
> and customize the 'trip point' to switch to the max frequency.
> 
> Link: https://bugzilla.kernel.org/show_bug.cgi?id=65501
> Signed-off-by: Chen Yu <yu.c.chen@...el.com>
> ---
>  drivers/cpufreq/cpufreq_ondemand.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c
> index 03ac6ce..2a093b5 100644
> --- a/drivers/cpufreq/cpufreq_ondemand.c
> +++ b/drivers/cpufreq/cpufreq_ondemand.c
> @@ -24,7 +24,7 @@
>  #define MAX_SAMPLING_DOWN_FACTOR		(100000)
>  #define MICRO_FREQUENCY_UP_THRESHOLD		(95)
>  #define MICRO_FREQUENCY_MIN_SAMPLE_RATE		(10000)
> -#define MIN_FREQUENCY_UP_THRESHOLD		(11)
> +#define MIN_FREQUENCY_UP_THRESHOLD		(1)
>  #define MAX_FREQUENCY_UP_THRESHOLD		(100)
>  
>  static DEFINE_PER_CPU(struct od_cpu_dbs_info_s, od_cpu_dbs_info);

Acked-by: Viresh Kumar <viresh.kumar@...aro.org>

-- 
viresh
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