diff options
Diffstat (limited to 'drivers/cpufreq/cpufreq_conservative.c')
| -rw-r--r-- | drivers/cpufreq/cpufreq_conservative.c | 53 |
1 files changed, 18 insertions, 35 deletions
diff --git a/drivers/cpufreq/cpufreq_conservative.c b/drivers/cpufreq/cpufreq_conservative.c index dd2f5b272a4..3082a3fa5ec 100644 --- a/drivers/cpufreq/cpufreq_conservative.c +++ b/drivers/cpufreq/cpufreq_conservative.c @@ -89,6 +89,15 @@ static struct dbs_tuners dbs_tuners_ins = { .sampling_down_factor = DEF_SAMPLING_DOWN_FACTOR, }; +static inline unsigned int get_cpu_idle_time(unsigned int cpu) +{ + return kstat_cpu(cpu).cpustat.idle + + kstat_cpu(cpu).cpustat.iowait + + ( !dbs_tuners_ins.ignore_nice ? + kstat_cpu(cpu).cpustat.nice : + 0); +} + /************************** sysfs interface ************************/ static ssize_t show_sampling_rate_max(struct cpufreq_policy *policy, char *buf) { @@ -221,16 +230,10 @@ static ssize_t store_ignore_nice(struct cpufreq_policy *policy, dbs_tuners_ins.ignore_nice = input; /* we need to re-evaluate prev_cpu_idle_up and prev_cpu_idle_down */ - for_each_cpu_mask(j, policy->cpus) { + for_each_online_cpu(j) { struct cpu_dbs_info_s *j_dbs_info; j_dbs_info = &per_cpu(cpu_dbs_info, j); - j_dbs_info->cur_policy = policy; - - j_dbs_info->prev_cpu_idle_up = - kstat_cpu(j).cpustat.idle + - kstat_cpu(j).cpustat.iowait + - ( !dbs_tuners_ins.ignore_nice - ? kstat_cpu(j).cpustat.nice : 0 ); + j_dbs_info->prev_cpu_idle_up = get_cpu_idle_time(j); j_dbs_info->prev_cpu_idle_down = j_dbs_info->prev_cpu_idle_up; } up(&dbs_sem); @@ -335,11 +338,7 @@ static void dbs_check_cpu(int cpu) */ /* Check for frequency increase */ - total_idle_ticks = kstat_cpu(cpu).cpustat.idle + - kstat_cpu(cpu).cpustat.iowait; - /* consider 'nice' tasks as 'idle' time too if required */ - if (dbs_tuners_ins.ignore_nice == 0) - total_idle_ticks += kstat_cpu(cpu).cpustat.nice; + total_idle_ticks = get_cpu_idle_time(cpu); idle_ticks = total_idle_ticks - this_dbs_info->prev_cpu_idle_up; this_dbs_info->prev_cpu_idle_up = total_idle_ticks; @@ -354,11 +353,7 @@ static void dbs_check_cpu(int cpu) j_dbs_info = &per_cpu(cpu_dbs_info, j); /* Check for frequency increase */ - total_idle_ticks = kstat_cpu(j).cpustat.idle + - kstat_cpu(j).cpustat.iowait; - /* consider 'nice' too? */ - if (dbs_tuners_ins.ignore_nice == 0) - total_idle_ticks += kstat_cpu(j).cpustat.nice; + total_idle_ticks = get_cpu_idle_time(j); tmp_idle_ticks = total_idle_ticks - j_dbs_info->prev_cpu_idle_up; j_dbs_info->prev_cpu_idle_up = total_idle_ticks; @@ -373,6 +368,8 @@ static void dbs_check_cpu(int cpu) usecs_to_jiffies(dbs_tuners_ins.sampling_rate); if (idle_ticks < up_idle_ticks) { + down_skip[cpu] = 0; + this_dbs_info->prev_cpu_idle_down = total_idle_ticks; /* if we are already at full speed then break out early */ if (requested_freq[cpu] == policy->max) return; @@ -389,8 +386,6 @@ static void dbs_check_cpu(int cpu) __cpufreq_driver_target(policy, requested_freq[cpu], CPUFREQ_RELATION_H); - down_skip[cpu] = 0; - this_dbs_info->prev_cpu_idle_down = total_idle_ticks; return; } @@ -399,11 +394,7 @@ static void dbs_check_cpu(int cpu) if (down_skip[cpu] < dbs_tuners_ins.sampling_down_factor) return; - total_idle_ticks = kstat_cpu(cpu).cpustat.idle + - kstat_cpu(cpu).cpustat.iowait; - /* consider 'nice' too? */ - if (dbs_tuners_ins.ignore_nice == 0) - total_idle_ticks += kstat_cpu(cpu).cpustat.nice; + total_idle_ticks = this_dbs_info->prev_cpu_idle_up; idle_ticks = total_idle_ticks - this_dbs_info->prev_cpu_idle_down; this_dbs_info->prev_cpu_idle_down = total_idle_ticks; @@ -417,11 +408,7 @@ static void dbs_check_cpu(int cpu) j_dbs_info = &per_cpu(cpu_dbs_info, j); /* Check for frequency increase */ - total_idle_ticks = kstat_cpu(j).cpustat.idle + - kstat_cpu(j).cpustat.iowait; - /* consider 'nice' too? */ - if (dbs_tuners_ins.ignore_nice == 0) - total_idle_ticks += kstat_cpu(j).cpustat.nice; + total_idle_ticks = j_dbs_info->prev_cpu_idle_up; tmp_idle_ticks = total_idle_ticks - j_dbs_info->prev_cpu_idle_down; j_dbs_info->prev_cpu_idle_down = total_idle_ticks; @@ -516,11 +503,7 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy, j_dbs_info = &per_cpu(cpu_dbs_info, j); j_dbs_info->cur_policy = policy; - j_dbs_info->prev_cpu_idle_up = - kstat_cpu(j).cpustat.idle + - kstat_cpu(j).cpustat.iowait + - ( !dbs_tuners_ins.ignore_nice - ? kstat_cpu(j).cpustat.nice : 0 ); + j_dbs_info->prev_cpu_idle_up = get_cpu_idle_time(j); j_dbs_info->prev_cpu_idle_down = j_dbs_info->prev_cpu_idle_up; } |