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uid_cputime: Extends the cputime functionality to report power per uid

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/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>
This commit is contained in:
Ruchi Kandoi 2015-04-17 16:52:54 -07:00 • committed by John Stultz
parent 57192fc9d1
commit 82df5f280c
1 changed files with 10 additions and 2 deletions
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12
drivers/misc/uid_cputime.c
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@ -38,6 +38,8 @@ struct uid_entry {
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 @@ static int uid_stat_show(struct seq_file *m, void *v)
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 @@ static int uid_stat_show(struct seq_file *m, void *v)
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 @@ static int uid_stat_show(struct seq_file *m, void *v)
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 @@ static int process_notifier(struct notifier_block *self,
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);