diff options
Diffstat (limited to 'drivers/cpufreq/cpufreq_ondemand.c')
| -rw-r--r-- | drivers/cpufreq/cpufreq_ondemand.c | 66 |
1 files changed, 62 insertions, 4 deletions
diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c index 84c658822a1..7d7244314ac 100644 --- a/drivers/cpufreq/cpufreq_ondemand.c +++ b/drivers/cpufreq/cpufreq_ondemand.c @@ -78,6 +78,7 @@ struct dbs_tuners { unsigned int sampling_down_factor; unsigned int up_threshold; unsigned int down_threshold; + unsigned int ignore_nice; }; static struct dbs_tuners dbs_tuners_ins = { @@ -115,6 +116,7 @@ show_one(sampling_rate, sampling_rate); show_one(sampling_down_factor, sampling_down_factor); show_one(up_threshold, up_threshold); show_one(down_threshold, down_threshold); +show_one(ignore_nice, ignore_nice); static ssize_t store_sampling_down_factor(struct cpufreq_policy *unused, const char *buf, size_t count) @@ -193,6 +195,46 @@ static ssize_t store_down_threshold(struct cpufreq_policy *unused, return count; } +static ssize_t store_ignore_nice(struct cpufreq_policy *policy, + const char *buf, size_t count) +{ + unsigned int input; + int ret; + + unsigned int j; + + ret = sscanf (buf, "%u", &input); + if ( ret != 1 ) + return -EINVAL; + + if ( input > 1 ) + input = 1; + + down(&dbs_sem); + if ( input == dbs_tuners_ins.ignore_nice ) { /* nothing to do */ + up(&dbs_sem); + return count; + } + 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) { + 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_down = j_dbs_info->prev_cpu_idle_up; + } + up(&dbs_sem); + + return count; +} + #define define_one_rw(_name) \ static struct freq_attr _name = \ __ATTR(_name, 0644, show_##_name, store_##_name) @@ -201,6 +243,7 @@ define_one_rw(sampling_rate); define_one_rw(sampling_down_factor); define_one_rw(up_threshold); define_one_rw(down_threshold); +define_one_rw(ignore_nice); static struct attribute * dbs_attributes[] = { &sampling_rate_max.attr, @@ -209,6 +252,7 @@ static struct attribute * dbs_attributes[] = { &sampling_down_factor.attr, &up_threshold.attr, &down_threshold.attr, + &ignore_nice.attr, NULL }; @@ -253,6 +297,9 @@ 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; idle_ticks = total_idle_ticks - this_dbs_info->prev_cpu_idle_up; this_dbs_info->prev_cpu_idle_up = total_idle_ticks; @@ -269,6 +316,9 @@ static void dbs_check_cpu(int cpu) /* 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; tmp_idle_ticks = total_idle_ticks - j_dbs_info->prev_cpu_idle_up; j_dbs_info->prev_cpu_idle_up = total_idle_ticks; @@ -297,6 +347,9 @@ static void dbs_check_cpu(int cpu) 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; idle_ticks = total_idle_ticks - this_dbs_info->prev_cpu_idle_down; this_dbs_info->prev_cpu_idle_down = total_idle_ticks; @@ -312,6 +365,9 @@ static void dbs_check_cpu(int cpu) /* 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; tmp_idle_ticks = total_idle_ticks - j_dbs_info->prev_cpu_idle_down; j_dbs_info->prev_cpu_idle_down = total_idle_ticks; @@ -397,10 +453,11 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy, j_dbs_info->prev_cpu_idle_up = kstat_cpu(j).cpustat.idle + - kstat_cpu(j).cpustat.iowait; - j_dbs_info->prev_cpu_idle_down = - kstat_cpu(j).cpustat.idle + - kstat_cpu(j).cpustat.iowait; + kstat_cpu(j).cpustat.iowait + + ( !dbs_tuners_ins.ignore_nice + ? kstat_cpu(j).cpustat.nice : 0 ); + j_dbs_info->prev_cpu_idle_down + = j_dbs_info->prev_cpu_idle_up; } this_dbs_info->enable = 1; sysfs_create_group(&policy->kobj, &dbs_attr_group); @@ -420,6 +477,7 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy, def_sampling_rate = (latency / 1000) * DEF_SAMPLING_RATE_LATENCY_MULTIPLIER; dbs_tuners_ins.sampling_rate = def_sampling_rate; + dbs_tuners_ins.ignore_nice = 0; dbs_timer_init(); } |