Re: [PATCH RESEND] cpufreq: Break out early when frequency equals target_freq

[Viresh Kumar]

On 14 May 2014 23:35, Stratos Karafotis <stratosk@xxxxxxxxxxxx> wrote:
> Many drivers keep frequencies in frequency table in ascending
> or descending order. When governor tries to change to policy->min
> or policy->max respectively then the cpufreq_frequency_table_target
> could return on first iteration. This will save some iteration cycles.
>
> So, break out early when a frequency in cpufreq_frequency_table
> equals to target one.
>
> Testing this during kernel compilation using ondemand governor
> with a frequency table in ascending order, the
> cpufreq_frequency_table_target returned early on the first
> iteration at about 30% of times called.
>
> Signed-off-by: Stratos Karafotis <stratosk@xxxxxxxxxxxx>
> ---
>  drivers/cpufreq/freq_table.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)

Acked-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/