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SubjectRe: [PATCH RESEND] cpufreq: Break out early when frequency equals target_freq
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On 14 May 2014 23:35, Stratos Karafotis <stratosk@semaphore.gr> 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@semaphore.gr>
> ---
> drivers/cpufreq/freq_table.c | 8 ++++++--
> 1 file changed, 6 insertions(+), 2 deletions(-)

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


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