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authorKen Chen <kenchen@google.com>2008-12-15 22:04:15 -0800
committerIngo Molnar <mingo@elte.hu>2008-12-16 12:15:01 +0100
commite9515c3c9feecd74174c2998add0db51e02abb8d (patch)
tree961e5fc9f0d01a901fd28c548b8f39037611a4ce
parent720f54988e17b33f3f477010b3a68ee872d20d5a (diff)
sched, cpuacct: export percpu cpuacct cgroup stats
This patch export per-cpu CPU cycle usage for a given cpuacct cgroup. There is a need for a user space monitor daemon to track group CPU usage on per-cpu base. It is also useful for monitoring CFS load balancer behavior by tracking per CPU group usage. Signed-off-by: Ken Chen <kenchen@google.com> Reviewed-by: Li Zefan <lizf@cn.fujitsu.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
-rw-r--r--kernel/sched.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index 41b7e2d524d6..f53e2b8ef521 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -9342,12 +9342,32 @@ out:
return err;
}
+static int cpuacct_percpu_seq_read(struct cgroup *cgroup, struct cftype *cft,
+ struct seq_file *m)
+{
+ struct cpuacct *ca = cgroup_ca(cgroup);
+ u64 percpu;
+ int i;
+
+ for_each_present_cpu(i) {
+ percpu = cpuacct_cpuusage_read(ca, i);
+ seq_printf(m, "%llu ", (unsigned long long) percpu);
+ }
+ seq_printf(m, "\n");
+ return 0;
+}
+
static struct cftype files[] = {
{
.name = "usage",
.read_u64 = cpuusage_read,
.write_u64 = cpuusage_write,
},
+ {
+ .name = "usage_percpu",
+ .read_seq_string = cpuacct_percpu_seq_read,
+ },
+
};
static int cpuacct_populate(struct cgroup_subsys *ss, struct cgroup *cgrp)