scheduler: cpuacct: Enable platform callbacks for cpuacct power tracking
Platform must register cpu power function that return power in
milliWatt seconds.
Change-Id: I1caa0335e316c352eee3b1ddf326fcd4942bcbe8
Signed-off-by: Mike Chan <mike@android.com>
diff --git a/kernel/sched.c b/kernel/sched.c
index 147e20d..d081156 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -9140,12 +9140,28 @@
struct cgroup_map_cb *cb)
{
struct cpuacct *ca = cgroup_ca(cgrp);
- if (ca->cpufreq_fn && ca->cpufreq_fn->show)
- ca->cpufreq_fn->show(ca->cpuacct_data, cb);
+ if (ca->cpufreq_fn && ca->cpufreq_fn->cpufreq_show)
+ ca->cpufreq_fn->cpufreq_show(ca->cpuacct_data, cb);
return 0;
}
+/* return total cpu power usage (milliWatt second) of a group */
+static u64 cpuacct_powerusage_read(struct cgroup *cgrp, struct cftype *cft)
+{
+ int i;
+ struct cpuacct *ca = cgroup_ca(cgrp);
+ u64 totalpower = 0;
+
+ if (ca->cpufreq_fn && ca->cpufreq_fn->power_usage)
+ for_each_present_cpu(i) {
+ totalpower += ca->cpufreq_fn->power_usage(
+ ca->cpuacct_data);
+ }
+
+ return totalpower;
+}
+
static struct cftype files[] = {
{
.name = "usage",
@@ -9164,6 +9180,10 @@
.name = "cpufreq",
.read_map = cpuacct_cpufreq_show,
},
+ {
+ .name = "power",
+ .read_u64 = cpuacct_powerusage_read
+ },
};
static int cpuacct_populate(struct cgroup_subsys *ss, struct cgroup *cgrp)