diff options
author | Dave Jones <davej@redhat.com> | 2005-05-31 19:03:49 -0700 |
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committer | Dave Jones <davej@redhat.com> | 2005-05-31 19:03:49 -0700 |
commit | dac1c1a56279b4545a822ec7bc770003c233e546 (patch) | |
tree | 61175f7534ae731b1eaa4b75a3410a447058b4dc /drivers/cpufreq/cpufreq_ondemand.c | |
parent | 1206aaac285904e3e3995eecbf4129b6555a8973 (diff) | |
download | kernel_samsung_smdk4412-dac1c1a56279b4545a822ec7bc770003c233e546.zip kernel_samsung_smdk4412-dac1c1a56279b4545a822ec7bc770003c233e546.tar.gz kernel_samsung_smdk4412-dac1c1a56279b4545a822ec7bc770003c233e546.tar.bz2 |
[CPUFREQ] ondemand,conservative minor bug-fix and cleanup
[PATCH] [1/5] ondemand,conservative minor bug-fix and cleanup
Attached patch fixes some minor issues with Alexander's patch and related
cleanup in both ondemand and conservative governor.
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Dave Jones <davej@redhat.com>
Diffstat (limited to 'drivers/cpufreq/cpufreq_ondemand.c')
-rw-r--r-- | drivers/cpufreq/cpufreq_ondemand.c | 58 |
1 files changed, 20 insertions, 38 deletions
diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c index 0565916..26cf54b 100644 --- a/drivers/cpufreq/cpufreq_ondemand.c +++ b/drivers/cpufreq/cpufreq_ondemand.c @@ -88,6 +88,15 @@ 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) { @@ -220,16 +229,10 @@ 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); @@ -322,15 +325,10 @@ 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; - for_each_cpu_mask(j, policy->cpus) { unsigned int tmp_idle_ticks; @@ -341,11 +339,7 @@ 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; @@ -360,14 +354,14 @@ 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 (policy->cur == policy->max) return; __cpufreq_driver_target(policy, policy->max, CPUFREQ_RELATION_H); - down_skip[cpu] = 0; - this_dbs_info->prev_cpu_idle_down = total_idle_ticks; return; } @@ -376,11 +370,7 @@ 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; @@ -393,12 +383,8 @@ static void dbs_check_cpu(int cpu) continue; 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; + /* Check for frequency decrease */ + 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; @@ -414,7 +400,7 @@ static void dbs_check_cpu(int cpu) freq_down_sampling_rate = dbs_tuners_ins.sampling_rate * dbs_tuners_ins.sampling_down_factor; down_idle_ticks = (100 - dbs_tuners_ins.down_threshold) * - usecs_to_jiffies(freq_down_sampling_rate); + usecs_to_jiffies(freq_down_sampling_rate); if (idle_ticks > down_idle_ticks ) { /* if we are already at the lowest speed then break out early @@ -488,11 +474,7 @@ 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; } |