ANDROID: uid_cputime: Extends the cputime functionality to report power per uid
/proc/uid_cputime/show_uid_stats shows a third field power for each of
the uids. It represents the power in the units (uAusec)
Change-Id: I52fdc5e59647e9dc97561a26d56f462a2689ba9c
Signed-off-by: Ruchi Kandoi <kandoiruchi@google.com>
diff --git a/drivers/misc/uid_cputime.c b/drivers/misc/uid_cputime.c
index c3f5bda..89bfba6 100644
--- a/drivers/misc/uid_cputime.c
+++ b/drivers/misc/uid_cputime.c
@@ -38,6 +38,8 @@
cputime_t stime;
cputime_t active_utime;
cputime_t active_stime;
+ unsigned long long active_power;
+ unsigned long long power;
struct hlist_node hash;
};
@@ -83,6 +85,7 @@
hash_for_each(hash_table, bkt, uid_entry, hash) {
uid_entry->active_stime = 0;
uid_entry->active_utime = 0;
+ uid_entry->active_power = 0;
}
read_lock(&tasklist_lock);
@@ -100,6 +103,7 @@
task_cputime_adjusted(task, &utime, &stime);
uid_entry->active_utime += utime;
uid_entry->active_stime += stime;
+ uid_entry->active_power += task->cpu_power;
}
read_unlock(&tasklist_lock);
@@ -108,9 +112,12 @@
uid_entry->active_utime;
cputime_t total_stime = uid_entry->stime +
uid_entry->active_stime;
- seq_printf(m, "%d: %u %u\n", uid_entry->uid,
+ unsigned long long total_power = uid_entry->power +
+ uid_entry->active_power;
+ seq_printf(m, "%d: %u %u %llu\n", uid_entry->uid,
cputime_to_usecs(total_utime),
- cputime_to_usecs(total_stime));
+ cputime_to_usecs(total_stime),
+ total_power);
}
mutex_unlock(&uid_lock);
@@ -203,6 +210,7 @@
task_cputime_adjusted(task, &utime, &stime);
uid_entry->utime += utime;
uid_entry->stime += stime;
+ uid_entry->power += task->cpu_power;
exit:
mutex_unlock(&uid_lock);