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cpufreq: conservative: Use an inline function to evaluate freq_target 

Use an inline function to evaluate freq_target to avoid duplicate code.

Also, define a macro for the default frequency step.

Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Stratos Karafotis 2013-03-22 08:03:17 +00:00 committed by Rafael J. Wysocki
parent cc721c4fdf
commit 9876584772
1 changed files with 16 additions and 12 deletions
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28
drivers/cpufreq/cpufreq_conservative.c
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@ -29,11 +29,24 @@
/* Conservative governor macros */
#define DEF_FREQUENCY_UP_THRESHOLD (80)
#define DEF_FREQUENCY_DOWN_THRESHOLD (20)
#define DEF_FREQUENCY_STEP (5)
#define DEF_SAMPLING_DOWN_FACTOR (1)
#define MAX_SAMPLING_DOWN_FACTOR (10)
static DEFINE_PER_CPU(struct cs_cpu_dbs_info_s, cs_cpu_dbs_info);
static inline unsigned int get_freq_target(struct cs_dbs_tuners *cs_tuners,
struct cpufreq_policy *policy)
{
unsigned int freq_target = (cs_tuners->freq_step * policy->max) / 100;
/* max freq cannot be less than 100. But who knows... */
if (unlikely(freq_target == 0))
freq_target = DEF_FREQUENCY_STEP;
return freq_target;
}
/*
* Every sampling_rate, we check, if current idle time is less than 20%
* (default), then we try to increase frequency. Every sampling_rate *
@ -49,7 +62,6 @@ static void cs_check_cpu(int cpu, unsigned int load)
struct cpufreq_policy *policy = dbs_info->cdbs.cur_policy;
struct dbs_data *dbs_data = policy->governor_data;
struct cs_dbs_tuners *cs_tuners = dbs_data->tuners;
unsigned int freq_target;
/*
* break out if we 'cannot' reduce the speed as the user might
@ -66,13 +78,7 @@ static void cs_check_cpu(int cpu, unsigned int load)
if (dbs_info->requested_freq == policy->max)
return;
freq_target = (cs_tuners->freq_step * policy->max) / 100;
/* max freq cannot be less than 100. But who knows.... */
if (unlikely(freq_target == 0))
freq_target = 5;
dbs_info->requested_freq += freq_target;
dbs_info->requested_freq += get_freq_target(cs_tuners, policy);
if (dbs_info->requested_freq > policy->max)
dbs_info->requested_freq = policy->max;
@ -94,9 +100,7 @@ static void cs_check_cpu(int cpu, unsigned int load)
if (policy->cur == policy->min)
return;
freq_target = (cs_tuners->freq_step * policy->max) / 100;
dbs_info->requested_freq -= freq_target;
dbs_info->requested_freq -= get_freq_target(cs_tuners, policy);
if (dbs_info->requested_freq < policy->min)
dbs_info->requested_freq = policy->min;
@ -335,7 +339,7 @@ static int cs_init(struct dbs_data *dbs_data)
tuners->down_threshold = DEF_FREQUENCY_DOWN_THRESHOLD;
tuners->sampling_down_factor = DEF_SAMPLING_DOWN_FACTOR;
tuners->ignore_nice = 0;
tuners->freq_step = 5;
tuners->freq_step = DEF_FREQUENCY_STEP;
dbs_data->tuners = tuners;
dbs_data->min_sampling_rate = MIN_SAMPLING_RATE_RATIO *