From 5cb2c3bd0c5e0f3ced63f250ec2ad59d7c5c626a Mon Sep 17 00:00:00 2001 From: Vincent Guittot Date: Mon, 7 Feb 2011 17:14:25 +0100 Subject: [PATCH] [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 Signed-off-by: Dave Jones --- drivers/cpufreq/cpufreq_ondemand.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-) diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c index 58aa85e..059179d 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); -- 2.7.4