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authorViresh Kumar <viresh.kumar@linaro.org>2013-01-31 17:28:02 +0000
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-02-02 01:02:44 +0100
commit4447266b842d27f77b017a59eb9dc38ad7b299f1 (patch)
treef8ae835b7ecee18948afabd75633ea7676b6a4ac /drivers/cpufreq/cpufreq_governor.c
parent8eeed0956615294200be783bb67d851280b5b1b9 (diff)
cpufreq: governors: Remove code redundancy between governors
With the inclusion of following patches: 9f4eb10 cpufreq: conservative: call dbs_check_cpu only when necessary 772b4b1 cpufreq: ondemand: call dbs_check_cpu only when necessary code redundancy between the conservative and ondemand governors is introduced again, so get rid of it. [rjw: Changelog] Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Tested-by: Fabio Baltieri <fabio.baltieri@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/cpufreq_governor.c')
-rw-r--r--drivers/cpufreq/cpufreq_governor.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c
index 29d6a59b1a15..7aaa9b151940 100644
--- a/drivers/cpufreq/cpufreq_governor.c
+++ b/drivers/cpufreq/cpufreq_governor.c
@@ -177,6 +177,25 @@ static inline void dbs_timer_exit(struct dbs_data *dbs_data, int cpu)
cancel_delayed_work_sync(&cdbs->work);
}
+/* Will return if we need to evaluate cpu load again or not */
+bool need_load_eval(struct cpu_dbs_common_info *cdbs,
+ unsigned int sampling_rate)
+{
+ if (policy_is_shared(cdbs->cur_policy)) {
+ ktime_t time_now = ktime_get();
+ s64 delta_us = ktime_us_delta(time_now, cdbs->time_stamp);
+
+ /* Do nothing if we recently have sampled */
+ if (delta_us < (s64)(sampling_rate / 2))
+ return false;
+ else
+ cdbs->time_stamp = time_now;
+ }
+
+ return true;
+}
+EXPORT_SYMBOL_GPL(need_load_eval);
+
int cpufreq_governor_dbs(struct dbs_data *dbs_data,
struct cpufreq_policy *policy, unsigned int event)
{