From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759006AbXJ2RUS (ORCPT ); Mon, 29 Oct 2007 13:20:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754637AbXJ2RUG (ORCPT ); Mon, 29 Oct 2007 13:20:06 -0400 Received: from smtp-out.google.com ([216.239.45.13]:56327 "EHLO smtp-out.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754362AbXJ2RUF (ORCPT ); Mon, 29 Oct 2007 13:20:05 -0400 DomainKey-Signature: a=rsa-sha1; s=beta; d=google.com; c=nofws; q=dns; h=received:to:subject:cc:message-id:date:from; b=gKrt9OJFiRTmlosh2bSksIA1K+Q0gFElrgjJZgHMN9WGd5HNmJAXrOhhEtspeBrWl yoL4CdTYhNbeWxyb8DEWw== To: akpm@linux-foundation.org, mingo@elte.hu, vatsa@in.ibm.com Subject: [PATCH] Report usage in CFS cgroup Cc: containers@lists.linux-foundation.org, linux-kernel@vger.kernel.org Message-Id: <20071029171908.A4633465FDC@localhost> Date: Mon, 29 Oct 2007 13:19:08 -0400 (EDT) From: menage@google.com (Paul Menage) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Report CPU usage in CFS Cgroup directories Adds a cpu.usage file to the CFS cgroup that reports CPU usage in milliseconds for that cgroup's tasks Signed-off-by: Paul Menage --- kernel/sched.c | 36 +++++++++++++++++++++++++++++++----- 1 file changed, 31 insertions(+), 5 deletions(-) Index: container-2.6.23-mm1/kernel/sched.c =================================================================== --- container-2.6.23-mm1.orig/kernel/sched.c +++ container-2.6.23-mm1/kernel/sched.c @@ -7005,15 +7005,41 @@ static u64 cpu_shares_read_uint(struct c return (u64) tg->shares; } -static struct cftype cpu_shares = { - .name = "shares", - .read_uint = cpu_shares_read_uint, - .write_uint = cpu_shares_write_uint, +static u64 cpu_usage_read(struct cgroup *cgrp, struct cftype *cft) +{ + struct task_group *tg = cgroup_tg(cgrp); + int i; + u64 res = 0; + for_each_possible_cpu(i) { + unsigned long flags; + /* + * Lock to prevent races with updating 64-bit counters + * on 32-bit arches. + */ + spin_lock_irqsave(&cpu_rq(i)->lock, flags); + res += tg->se[i]->sum_exec_runtime; + spin_unlock_irqrestore(&cpu_rq(i)->lock, flags); + } + /* Convert from ns to ms */ + do_div(res, 1000000); + return res; +} + +static struct cftype cpu_files[] = { + { + .name = "shares", + .read_uint = cpu_shares_read_uint, + .write_uint = cpu_shares_write_uint, + }, + { + .name = "usage", + .read_uint = cpu_usage_read, + }, }; static int cpu_cgroup_populate(struct cgroup_subsys *ss, struct cgroup *cont) { - return cgroup_add_file(cont, ss, &cpu_shares); + return cgroup_add_files(cont, ss, cpu_files, ARRAY_SIZE(cpu_files)); } struct cgroup_subsys cpu_cgroup_subsys = {