Messages in this thread Patch in this message | | | Date | Fri, 5 Dec 2008 10:16:30 -0800 | Subject | Re: [patch] export percpu cpuacct cgroup stats | From | Ken Chen <> |
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On Fri, Dec 5, 2008 at 5:52 AM, Ingo Molnar <mingo@elte.hu> wrote: > Could someone please send the final patch with a final changelog, with > all fixlets and tags in place please?
Here it is:
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>
diff --git a/kernel/sched.c b/kernel/sched.c index b7480fb..055c54f 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -9345,12 +9345,34 @@ 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_possible_cpu(i) { + spin_lock_irq(&cpu_rq(i)->lock); + percpu = *percpu_ptr(ca->cpuusage, i); + spin_unlock_irq(&cpu_rq(i)->lock); + 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)
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