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[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>
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Dave Jones
parent
1206aaac28
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dac1c1a562
@ -89,6 +89,15 @@ static struct dbs_tuners dbs_tuners_ins = {
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.sampling_down_factor = DEF_SAMPLING_DOWN_FACTOR,
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};
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static inline unsigned int get_cpu_idle_time(unsigned int cpu)
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{
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return kstat_cpu(cpu).cpustat.idle +
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kstat_cpu(cpu).cpustat.iowait +
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( !dbs_tuners_ins.ignore_nice ?
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kstat_cpu(cpu).cpustat.nice :
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0);
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}
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/************************** sysfs interface ************************/
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static ssize_t show_sampling_rate_max(struct cpufreq_policy *policy, char *buf)
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{
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@ -221,16 +230,10 @@ static ssize_t store_ignore_nice(struct cpufreq_policy *policy,
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dbs_tuners_ins.ignore_nice = input;
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/* we need to re-evaluate prev_cpu_idle_up and prev_cpu_idle_down */
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for_each_cpu_mask(j, policy->cpus) {
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for_each_online_cpu(j) {
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struct cpu_dbs_info_s *j_dbs_info;
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j_dbs_info = &per_cpu(cpu_dbs_info, j);
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j_dbs_info->cur_policy = policy;
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j_dbs_info->prev_cpu_idle_up =
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kstat_cpu(j).cpustat.idle +
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kstat_cpu(j).cpustat.iowait +
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( !dbs_tuners_ins.ignore_nice
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? kstat_cpu(j).cpustat.nice : 0 );
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j_dbs_info->prev_cpu_idle_up = get_cpu_idle_time(j);
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j_dbs_info->prev_cpu_idle_down = j_dbs_info->prev_cpu_idle_up;
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}
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up(&dbs_sem);
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@ -335,11 +338,7 @@ static void dbs_check_cpu(int cpu)
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*/
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/* Check for frequency increase */
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total_idle_ticks = kstat_cpu(cpu).cpustat.idle +
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kstat_cpu(cpu).cpustat.iowait;
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/* consider 'nice' tasks as 'idle' time too if required */
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if (dbs_tuners_ins.ignore_nice == 0)
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total_idle_ticks += kstat_cpu(cpu).cpustat.nice;
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total_idle_ticks = get_cpu_idle_time(cpu);
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idle_ticks = total_idle_ticks -
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this_dbs_info->prev_cpu_idle_up;
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this_dbs_info->prev_cpu_idle_up = total_idle_ticks;
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@ -354,11 +353,7 @@ static void dbs_check_cpu(int cpu)
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j_dbs_info = &per_cpu(cpu_dbs_info, j);
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/* Check for frequency increase */
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total_idle_ticks = kstat_cpu(j).cpustat.idle +
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kstat_cpu(j).cpustat.iowait;
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/* consider 'nice' too? */
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if (dbs_tuners_ins.ignore_nice == 0)
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total_idle_ticks += kstat_cpu(j).cpustat.nice;
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total_idle_ticks = get_cpu_idle_time(j);
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tmp_idle_ticks = total_idle_ticks -
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j_dbs_info->prev_cpu_idle_up;
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j_dbs_info->prev_cpu_idle_up = total_idle_ticks;
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@ -373,6 +368,8 @@ static void dbs_check_cpu(int cpu)
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usecs_to_jiffies(dbs_tuners_ins.sampling_rate);
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if (idle_ticks < up_idle_ticks) {
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down_skip[cpu] = 0;
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this_dbs_info->prev_cpu_idle_down = total_idle_ticks;
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/* if we are already at full speed then break out early */
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if (requested_freq[cpu] == policy->max)
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return;
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@ -389,8 +386,6 @@ static void dbs_check_cpu(int cpu)
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__cpufreq_driver_target(policy, requested_freq[cpu],
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CPUFREQ_RELATION_H);
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down_skip[cpu] = 0;
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this_dbs_info->prev_cpu_idle_down = total_idle_ticks;
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return;
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}
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@ -399,11 +394,7 @@ static void dbs_check_cpu(int cpu)
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if (down_skip[cpu] < dbs_tuners_ins.sampling_down_factor)
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return;
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total_idle_ticks = kstat_cpu(cpu).cpustat.idle +
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kstat_cpu(cpu).cpustat.iowait;
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/* consider 'nice' too? */
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if (dbs_tuners_ins.ignore_nice == 0)
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total_idle_ticks += kstat_cpu(cpu).cpustat.nice;
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total_idle_ticks = this_dbs_info->prev_cpu_idle_up;
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idle_ticks = total_idle_ticks -
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this_dbs_info->prev_cpu_idle_down;
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this_dbs_info->prev_cpu_idle_down = total_idle_ticks;
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@ -417,11 +408,7 @@ static void dbs_check_cpu(int cpu)
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j_dbs_info = &per_cpu(cpu_dbs_info, j);
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/* Check for frequency increase */
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total_idle_ticks = kstat_cpu(j).cpustat.idle +
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kstat_cpu(j).cpustat.iowait;
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/* consider 'nice' too? */
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if (dbs_tuners_ins.ignore_nice == 0)
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total_idle_ticks += kstat_cpu(j).cpustat.nice;
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total_idle_ticks = j_dbs_info->prev_cpu_idle_up;
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tmp_idle_ticks = total_idle_ticks -
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j_dbs_info->prev_cpu_idle_down;
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j_dbs_info->prev_cpu_idle_down = total_idle_ticks;
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@ -516,11 +503,7 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
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j_dbs_info = &per_cpu(cpu_dbs_info, j);
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j_dbs_info->cur_policy = policy;
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j_dbs_info->prev_cpu_idle_up =
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kstat_cpu(j).cpustat.idle +
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kstat_cpu(j).cpustat.iowait +
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( !dbs_tuners_ins.ignore_nice
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? kstat_cpu(j).cpustat.nice : 0 );
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j_dbs_info->prev_cpu_idle_up = get_cpu_idle_time(j);
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j_dbs_info->prev_cpu_idle_down
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= j_dbs_info->prev_cpu_idle_up;
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}
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@ -88,6 +88,15 @@ static struct dbs_tuners dbs_tuners_ins = {
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.sampling_down_factor = DEF_SAMPLING_DOWN_FACTOR,
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};
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static inline unsigned int get_cpu_idle_time(unsigned int cpu)
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{
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return kstat_cpu(cpu).cpustat.idle +
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kstat_cpu(cpu).cpustat.iowait +
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( !dbs_tuners_ins.ignore_nice ?
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kstat_cpu(cpu).cpustat.nice :
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0);
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}
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/************************** sysfs interface ************************/
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static ssize_t show_sampling_rate_max(struct cpufreq_policy *policy, char *buf)
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{
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@ -220,16 +229,10 @@ static ssize_t store_ignore_nice(struct cpufreq_policy *policy,
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dbs_tuners_ins.ignore_nice = input;
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/* we need to re-evaluate prev_cpu_idle_up and prev_cpu_idle_down */
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for_each_cpu_mask(j, policy->cpus) {
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for_each_online_cpu(j) {
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struct cpu_dbs_info_s *j_dbs_info;
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j_dbs_info = &per_cpu(cpu_dbs_info, j);
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j_dbs_info->cur_policy = policy;
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j_dbs_info->prev_cpu_idle_up =
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kstat_cpu(j).cpustat.idle +
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kstat_cpu(j).cpustat.iowait +
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( !dbs_tuners_ins.ignore_nice
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? kstat_cpu(j).cpustat.nice : 0 );
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j_dbs_info->prev_cpu_idle_up = get_cpu_idle_time(j);
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j_dbs_info->prev_cpu_idle_down = j_dbs_info->prev_cpu_idle_up;
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}
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up(&dbs_sem);
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@ -322,15 +325,10 @@ static void dbs_check_cpu(int cpu)
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*/
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/* Check for frequency increase */
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total_idle_ticks = kstat_cpu(cpu).cpustat.idle +
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kstat_cpu(cpu).cpustat.iowait;
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/* consider 'nice' tasks as 'idle' time too if required */
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if (dbs_tuners_ins.ignore_nice == 0)
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total_idle_ticks += kstat_cpu(cpu).cpustat.nice;
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total_idle_ticks = get_cpu_idle_time(cpu);
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idle_ticks = total_idle_ticks -
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this_dbs_info->prev_cpu_idle_up;
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this_dbs_info->prev_cpu_idle_up = total_idle_ticks;
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for_each_cpu_mask(j, policy->cpus) {
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unsigned int tmp_idle_ticks;
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@ -341,11 +339,7 @@ static void dbs_check_cpu(int cpu)
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j_dbs_info = &per_cpu(cpu_dbs_info, j);
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/* Check for frequency increase */
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total_idle_ticks = kstat_cpu(j).cpustat.idle +
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kstat_cpu(j).cpustat.iowait;
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/* consider 'nice' too? */
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if (dbs_tuners_ins.ignore_nice == 0)
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total_idle_ticks += kstat_cpu(j).cpustat.nice;
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total_idle_ticks = get_cpu_idle_time(j);
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tmp_idle_ticks = total_idle_ticks -
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j_dbs_info->prev_cpu_idle_up;
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j_dbs_info->prev_cpu_idle_up = total_idle_ticks;
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@ -360,14 +354,14 @@ static void dbs_check_cpu(int cpu)
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usecs_to_jiffies(dbs_tuners_ins.sampling_rate);
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if (idle_ticks < up_idle_ticks) {
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down_skip[cpu] = 0;
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this_dbs_info->prev_cpu_idle_down = total_idle_ticks;
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/* if we are already at full speed then break out early */
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if (policy->cur == policy->max)
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return;
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__cpufreq_driver_target(policy, policy->max,
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CPUFREQ_RELATION_H);
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down_skip[cpu] = 0;
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this_dbs_info->prev_cpu_idle_down = total_idle_ticks;
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return;
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}
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@ -376,11 +370,7 @@ static void dbs_check_cpu(int cpu)
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if (down_skip[cpu] < dbs_tuners_ins.sampling_down_factor)
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return;
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total_idle_ticks = kstat_cpu(cpu).cpustat.idle +
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kstat_cpu(cpu).cpustat.iowait;
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/* consider 'nice' too? */
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if (dbs_tuners_ins.ignore_nice == 0)
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total_idle_ticks += kstat_cpu(cpu).cpustat.nice;
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total_idle_ticks = this_dbs_info->prev_cpu_idle_up;
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idle_ticks = total_idle_ticks -
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this_dbs_info->prev_cpu_idle_down;
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this_dbs_info->prev_cpu_idle_down = total_idle_ticks;
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@ -393,12 +383,8 @@ static void dbs_check_cpu(int cpu)
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continue;
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j_dbs_info = &per_cpu(cpu_dbs_info, j);
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/* Check for frequency increase */
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total_idle_ticks = kstat_cpu(j).cpustat.idle +
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kstat_cpu(j).cpustat.iowait;
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/* consider 'nice' too? */
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if (dbs_tuners_ins.ignore_nice == 0)
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total_idle_ticks += kstat_cpu(j).cpustat.nice;
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/* Check for frequency decrease */
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total_idle_ticks = j_dbs_info->prev_cpu_idle_up;
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tmp_idle_ticks = total_idle_ticks -
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j_dbs_info->prev_cpu_idle_down;
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j_dbs_info->prev_cpu_idle_down = total_idle_ticks;
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@ -414,7 +400,7 @@ static void dbs_check_cpu(int cpu)
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freq_down_sampling_rate = dbs_tuners_ins.sampling_rate *
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dbs_tuners_ins.sampling_down_factor;
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down_idle_ticks = (100 - dbs_tuners_ins.down_threshold) *
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usecs_to_jiffies(freq_down_sampling_rate);
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usecs_to_jiffies(freq_down_sampling_rate);
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if (idle_ticks > down_idle_ticks ) {
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/* if we are already at the lowest speed then break out early
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@ -488,11 +474,7 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
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j_dbs_info = &per_cpu(cpu_dbs_info, j);
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j_dbs_info->cur_policy = policy;
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j_dbs_info->prev_cpu_idle_up =
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kstat_cpu(j).cpustat.idle +
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kstat_cpu(j).cpustat.iowait +
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( !dbs_tuners_ins.ignore_nice
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? kstat_cpu(j).cpustat.nice : 0 );
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j_dbs_info->prev_cpu_idle_up = get_cpu_idle_time(j);
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j_dbs_info->prev_cpu_idle_down
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= j_dbs_info->prev_cpu_idle_up;
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}
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