diff options
| author | Ruchi Kandoi <kandoiruchi@google.com> | 2015-04-17 16:33:29 -0700 |
|---|---|---|
| committer | Moyster <oysterized@gmail.com> | 2016-09-10 16:03:52 +0200 |
| commit | d568ebc24c10a87c465ada70d0009c2f707ef121 (patch) | |
| tree | efc4f6da8217325c5771436735ae189e7d635c6c /drivers | |
| parent | bbc4c63b8fa5bb5d5e855a65714d9f57a02ac737 (diff) | |
sched: cpufreq: Adds a field cpu_power in the task_struct
cpu_power has been added to keep track of amount of power each task is
consuming. cpu_power is updated whenever stime and utime are updated for
a task. power is computed by taking into account the frequency at which
the current core was running and the current for cpu actively
running at hat frequency.
Bug: 21498425
Change-Id: Ic535941e7b339aab5cae9081a34049daeb44b248
Signed-off-by: Ruchi Kandoi <kandoiruchi@google.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/cpufreq/cpufreq_stats.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/cpufreq/cpufreq_stats.c b/drivers/cpufreq/cpufreq_stats.c index 824e4d529..5efb22fdc 100644 --- a/drivers/cpufreq/cpufreq_stats.c +++ b/drivers/cpufreq/cpufreq_stats.c @@ -23,6 +23,7 @@ #include <linux/sort.h> #include <linux/err.h> #include <linux/of.h> +#include <linux/sched.h> #include <asm/cputime.h> static spinlock_t cpufreq_stats_lock; @@ -133,6 +134,24 @@ static int get_index_all_cpufreq_stat(struct all_cpufreq_stats *all_stat, return -1; } +void acct_update_power(struct task_struct *task, cputime_t cputime) { + struct cpufreq_power_stats *powerstats; + struct cpufreq_stats *stats; + unsigned int cpu_num, curr; + + if (!task) + return; + cpu_num = task_cpu(task); + powerstats = per_cpu(cpufreq_power_stats, cpu_num); + stats = per_cpu(cpufreq_stats_table, cpu_num); + if (!powerstats || !stats) + return; + + curr = powerstats->curr[stats->last_index]; + task->cpu_power += curr * cputime_to_usecs(cputime); +} +EXPORT_SYMBOL_GPL(acct_update_power); + static ssize_t show_current_in_state(struct kobject *kobj, struct kobj_attribute *attr, char *buf) { |