diff options
Diffstat (limited to 'drivers/cpufreq/cpufreq_ondemand.c')
| -rw-r--r-- | drivers/cpufreq/cpufreq_ondemand.c | 34 |
1 files changed, 0 insertions, 34 deletions
diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c index e151adc..a87dc5d 100644 --- a/drivers/cpufreq/cpufreq_ondemand.c +++ b/drivers/cpufreq/cpufreq_ondemand.c @@ -85,7 +85,6 @@ struct cpu_dbs_info_s { cputime64_t prev_cpu_idle; cputime64_t prev_cpu_iowait; cputime64_t prev_cpu_wall; - unsigned int prev_cpu_wall_delta; cputime64_t prev_cpu_nice; struct cpufreq_policy *cur_policy; struct delayed_work work; @@ -609,10 +608,6 @@ static void dbs_check_cpu(struct cpu_dbs_info_s *this_dbs_info) unsigned int idle_time, wall_time, iowait_time; unsigned int load, load_freq; int freq_avg; - bool deep_sleep_detected = false; - /* the evil magic numbers, only 2 at least */ - const unsigned int deep_sleep_backoff = 10; - const unsigned int deep_sleep_factor = 5; j_dbs_info = &per_cpu(od_cpu_dbs_info, j); @@ -623,32 +618,6 @@ static void dbs_check_cpu(struct cpu_dbs_info_s *this_dbs_info) j_dbs_info->prev_cpu_wall); j_dbs_info->prev_cpu_wall = cur_wall_time; - /* - * Ignore wall delta jitters in both directions. An - * exceptionally long wall_time will likely result - * idle but it was waken up to do work so the next - * slice is less likely to want to run at low - * frequency. Let's evaluate the next slice instead of - * the idle long one that passed already and it's too - * late to reduce in frequency. As opposed an - * exceptionally short slice that just run at low - * frequency is unlikely to be idle, but we may go - * back to idle pretty soon and that not idle slice - * already passed. If short slices will keep coming - * after a series of long slices the exponential - * backoff will converge faster and we'll react faster - * to high load. As opposed we'll decay slower - * towards low load and long idle times. - */ - if (j_dbs_info->prev_cpu_wall_delta > - wall_time * deep_sleep_factor || - j_dbs_info->prev_cpu_wall_delta * deep_sleep_factor < - wall_time) - deep_sleep_detected = true; - j_dbs_info->prev_cpu_wall_delta = - (j_dbs_info->prev_cpu_wall_delta * deep_sleep_backoff - + wall_time) / (deep_sleep_backoff+1); - idle_time = (unsigned int) cputime64_sub(cur_idle_time, j_dbs_info->prev_cpu_idle); j_dbs_info->prev_cpu_idle = cur_idle_time; @@ -674,9 +643,6 @@ static void dbs_check_cpu(struct cpu_dbs_info_s *this_dbs_info) idle_time += jiffies_to_usecs(cur_nice_jiffies); } - if (deep_sleep_detected) - continue; - /* * For the purpose of ondemand, waiting for disk IO is an * indication that you're performance critical, and not that |