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[CPUFREQ] calculate delay after dbs_check_cpu

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calculate ondemand delay after dbs_check_cpu call because it can
modify rate_mult value

use freq_lo_jiffies value for the sub sample period of powersave_bias mode

Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Dave Jones <davej@redhat.com>
This commit is contained in:
Vincent Guittot 2011-02-07 17:14:25 +01:00 committed by Dave Jones
parent 5b95364f61
commit 5cb2c3bd0c
1 changed files with 11 additions and 6 deletions
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17
drivers/cpufreq/cpufreq_ondemand.c
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@ -642,12 +642,7 @@ static void do_dbs_timer(struct work_struct *work)
unsigned int cpu = dbs_info->cpu;
int sample_type = dbs_info->sample_type;
/* We want all CPUs to do sampling nearly on same jiffy */
int delay = usecs_to_jiffies(dbs_tuners_ins.sampling_rate
* dbs_info->rate_mult);
if (num_online_cpus() > 1)
delay -= jiffies % delay;
int delay;
mutex_lock(&dbs_info->timer_mutex);
@ -660,10 +655,20 @@ static void do_dbs_timer(struct work_struct *work)
/* Setup timer for SUB_SAMPLE */
dbs_info->sample_type = DBS_SUB_SAMPLE;
delay = dbs_info->freq_hi_jiffies;
} else {
/* We want all CPUs to do sampling nearly on
* same jiffy
*/
delay = usecs_to_jiffies(dbs_tuners_ins.sampling_rate
* dbs_info->rate_mult);
if (num_online_cpus() > 1)
delay -= jiffies % delay;
}
} else {
__cpufreq_driver_target(dbs_info->cur_policy,
dbs_info->freq_lo, CPUFREQ_RELATION_H);
delay = dbs_info->freq_lo_jiffies;
}
schedule_delayed_work_on(cpu, &dbs_info->work, delay);
mutex_unlock(&dbs_info->timer_mutex);