diff options
| author | Vincent Guittot <vincent.guittot@linaro.org> | 2011-02-07 17:14:25 +0100 |
|---|---|---|
| committer | Dave Jones <davej@redhat.com> | 2011-03-16 17:54:31 -0400 |
| commit | 5cb2c3bd0c5e0f3ced63f250ec2ad59d7c5c626a (patch) | |
| tree | 148f10ad6586d0f6f0046f18bd5cd4720f3b3ed3 /drivers/cpufreq | |
| parent | 5b95364f6101d67a073a5ec18d726e94e02ca605 (diff) | |
| download | lwn-5cb2c3bd0c5e0f3ced63f250ec2ad59d7c5c626a.tar.gz lwn-5cb2c3bd0c5e0f3ced63f250ec2ad59d7c5c626a.zip | |
[CPUFREQ] calculate delay after dbs_check_cpu
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>
Diffstat (limited to 'drivers/cpufreq')
| -rw-r--r-- | drivers/cpufreq/cpufreq_ondemand.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c index 58aa85ea5ec6..059179db1985 100644 --- a/drivers/cpufreq/cpufreq_ondemand.c +++ b/drivers/cpufreq/cpufreq_ondemand.c @@ -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); |