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[CPUFREQ] ondemand,conservative minor bug-fix and cleanup
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[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 committed Jun 1, 2005
1 parent 1206aaa commit dac1c1a
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Showing 2 changed files with 38 additions and 73 deletions.
53 changes: 18 additions & 35 deletions drivers/cpufreq/cpufreq_conservative.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -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)
{
Expand Down Expand Up @@ -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);
Expand Down Expand Up @@ -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;
Expand All @@ -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;
Expand All @@ -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;
Expand All @@ -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;
}

Expand All @@ -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;
Expand All @@ -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;
Expand Down Expand Up @@ -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;
}
Expand Down
58 changes: 20 additions & 38 deletions drivers/cpufreq/cpufreq_ondemand.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -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)
{
Expand Down Expand Up @@ -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);
Expand Down Expand Up @@ -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;
Expand All @@ -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;
Expand All @@ -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;
}

Expand All @@ -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;
Expand All @@ -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;
Expand All @@ -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
Expand Down Expand Up @@ -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;
}
Expand Down

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