Messages in this thread | | | Date | Thu, 15 May 2014 10:09:47 +0530 | Subject | Re: [PATCH RESEND] cpufreq: Break out early when frequency equals target_freq | From | Viresh Kumar <> |
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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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