diff options
| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-02-14 20:13:42 -0500 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-03-09 08:41:03 -0500 |
| commit | e4db2813d2e558b6b6bee464308678a57732b390 (patch) | |
| tree | 2cd9422569ce684971136492b12323d40c3e0a26 /drivers/cpufreq/cpufreq_governor.h | |
| parent | f62b93740c30d0a3f50258d45415f00b763dd70a (diff) | |
cpufreq: governor: Avoid atomic operations in hot paths
Rework the handling of work items by dbs_update_util_handler() and
dbs_work_handler() so the former (which is executed in scheduler
paths) only uses atomic operations when absolutely necessary. That
is, when the policy is shared and dbs_update_util_handler() has
already decided that this is the time to queue up a work item.
In particular, this avoids the atomic ops entirely on platforms where
policy objects are never shared.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'drivers/cpufreq/cpufreq_governor.h')
| -rw-r--r-- | drivers/cpufreq/cpufreq_governor.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/cpufreq/cpufreq_governor.h b/drivers/cpufreq/cpufreq_governor.h index 8138eff5e25b..521daac38ba5 100644 --- a/drivers/cpufreq/cpufreq_governor.h +++ b/drivers/cpufreq/cpufreq_governor.h | |||
| @@ -130,6 +130,9 @@ struct policy_dbs_info { | |||
| 130 | /* dbs_data may be shared between multiple policy objects */ | 130 | /* dbs_data may be shared between multiple policy objects */ |
| 131 | struct dbs_data *dbs_data; | 131 | struct dbs_data *dbs_data; |
| 132 | struct list_head list; | 132 | struct list_head list; |
| 133 | /* Status indicators */ | ||
| 134 | bool is_shared; /* This object is used by multiple CPUs */ | ||
| 135 | bool work_in_progress; /* Work is being queued up or in progress */ | ||
| 133 | }; | 136 | }; |
| 134 | 137 | ||
| 135 | static inline void gov_update_sample_delay(struct policy_dbs_info *policy_dbs, | 138 | static inline void gov_update_sample_delay(struct policy_dbs_info *policy_dbs, |