diff options
Diffstat (limited to 'drivers/cpufreq/cpufreq_ondemand.c')
| -rw-r--r-- | drivers/cpufreq/cpufreq_ondemand.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c index b935092aab21..3f898606e68c 100644 --- a/drivers/cpufreq/cpufreq_ondemand.c +++ b/drivers/cpufreq/cpufreq_ondemand.c @@ -24,6 +24,7 @@ * It helps to keep variable names smaller, simpler */ +#define DEF_FREQUENCY_DOWN_DIFFERENTIAL (10) #define DEF_FREQUENCY_UP_THRESHOLD (80) #define MIN_FREQUENCY_UP_THRESHOLD (11) #define MAX_FREQUENCY_UP_THRESHOLD (100) @@ -86,10 +87,12 @@ static struct workqueue_struct *kondemand_wq; static struct dbs_tuners { unsigned int sampling_rate; unsigned int up_threshold; + unsigned int down_differential; unsigned int ignore_nice; unsigned int powersave_bias; } dbs_tuners_ins = { .up_threshold = DEF_FREQUENCY_UP_THRESHOLD, + .down_differential = DEF_FREQUENCY_DOWN_DIFFERENTIAL, .ignore_nice = 0, .powersave_bias = 0, }; @@ -424,9 +427,13 @@ static void dbs_check_cpu(struct cpu_dbs_info_s *this_dbs_info) * can support the current CPU usage without triggering the up * policy. To be safe, we focus 10 points under the threshold. */ - if (max_load_freq < (dbs_tuners_ins.up_threshold - 10) * policy->cur) { + if (max_load_freq < + (dbs_tuners_ins.up_threshold - dbs_tuners_ins.down_differential) * + policy->cur) { unsigned int freq_next; - freq_next = max_load_freq / (dbs_tuners_ins.up_threshold - 10); + freq_next = max_load_freq / + (dbs_tuners_ins.up_threshold - + dbs_tuners_ins.down_differential); if (!dbs_tuners_ins.powersave_bias) { __cpufreq_driver_target(policy, freq_next, |