From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754285Ab1JBTXm (ORCPT ); Sun, 2 Oct 2011 15:23:42 -0400 Received: from mailhub.sw.ru ([195.214.232.25]:25203 "EHLO relay.sw.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754183Ab1JBTWe (ORCPT ); Sun, 2 Oct 2011 15:22:34 -0400 From: Glauber Costa To: linux-kernel@vger.kernel.org Cc: paul@paulmenage.org, lizf@cn.fujitsu.com, daniel.lezcano@free.fr, a.p.zijlstra@chello.nl, jbottomley@parallels.com, Glauber Costa Subject: [PATCH 06/10] per-cgroup boot time Date: Sun, 2 Oct 2011 23:21:23 +0400 Message-Id: <1317583287-18300-7-git-send-email-glommer@parallels.com> X-Mailer: git-send-email 1.7.6.2 In-Reply-To: <1317583287-18300-1-git-send-email-glommer@parallels.com> References: <1317583287-18300-1-git-send-email-glommer@parallels.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Record the time in which the cgroup was created. This can be used to provide a more accurate boottime information in cpuacct.proc.stat. Signed-off-by: Glauber Costa --- kernel/sched.c | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-) diff --git a/kernel/sched.c b/kernel/sched.c index 5a8181e..a2554b7 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -279,6 +279,7 @@ struct task_group { struct autogroup *autogroup; #endif struct kernel_stat __percpu *cpustat; + struct timespec start_time; }; /* task_group_lock serializes the addition/removal of task groups */ @@ -8127,6 +8128,7 @@ void __init sched_init(void) INIT_LIST_HEAD(&root_task_group.siblings); autogroup_init(&init_task); + root_task_group.start_time = (struct timespec){0, 0}; root_task_group.cpustat = alloc_percpu(struct kernel_stat); /* Failing that early an allocation means we're screwed anyway */ BUG_ON(!root_task_group.cpustat); @@ -8598,6 +8600,8 @@ struct task_group *sched_create_group(struct task_group *parent) kstat->cpustat[IOWAIT_BASE] = root_kstat->cpustat[IOWAIT]; } + get_monotonic_boottime(&tg->start_time); + spin_lock_irqsave(&task_group_lock, flags); list_add_rcu(&tg->list, &task_groups); @@ -9182,6 +9186,9 @@ int cpu_cgroup_proc_stat(struct cgroup *cgrp, struct cftype *cft, irq = softirq = steal = 0; guest = guest_nice = 0; getboottime(&boottime); +#ifdef CONFIG_CGROUP_SCHED + boottime = timespec_add(boottime, tg->start_time); +#endif jif = boottime.tv_sec; for_each_possible_cpu(i) { -- 1.7.6