From e9515c3c9feecd74174c2998add0db51e02abb8d Mon Sep 17 00:00:00 2001 From: Ken Chen Date: Mon, 15 Dec 2008 22:04:15 -0800 Subject: 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 Reviewed-by: Li Zefan Reviewed-by: Andrew Morton Signed-off-by: Ingo Molnar --- kernel/sched.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'kernel') diff --git a/kernel/sched.c b/kernel/sched.c index 41b7e2d524d..f53e2b8ef52 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) -- cgit v1.2.3