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authorFabio Baltieri <fabio.baltieri@linaro.org>2012-12-27 14:55:40 +0000
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-02-02 00:01:13 +0100
commitda53d61e21a5869b2e44247bb37deb8be387e063 (patch)
treed4a7f04cac977e16b6db523635cb875c8523fb2e /drivers/cpufreq/cpufreq_governor.c
parent2abfa876f1117b0ab45f191fb1f82c41b1cbc8fe (diff)
cpufreq: ondemand: call dbs_check_cpu only when necessary
Modify ondemand timer to not resample CPU utilization if recently sampled from another SW coordinated core. Signed-off-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.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c
index b0e4506f2cae..ee8b7cac11f3 100644
--- a/drivers/cpufreq/cpufreq_governor.c
+++ b/drivers/cpufreq/cpufreq_governor.c
@@ -290,6 +290,9 @@ second_time:
mutex_unlock(&dbs_data->mutex);
if (dbs_sw_coordinated_cpus(cpu_cdbs)) {
+ /* Initiate timer time stamp */
+ cpu_cdbs->time_stamp = ktime_get();
+
for_each_cpu(j, policy->cpus) {
struct cpu_dbs_common_info *j_cdbs;