From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Glauber Costa <glommer@parallels.com>
Cc: linux-kernel@vger.kernel.org, paul@paulmenage.org,
lizf@cn.fujitsu.com, daniel.lezcano@free.fr,
jbottomley@parallels.com, Balbir Singh <bsingharora@gmail.com>,
Paul Turner <pjt@google.com>
Subject: Re: [PATCH 09/10] provide a version of cpuusage statistics inside cpu cgroup
Date: Wed, 05 Oct 2011 11:46:28 +0200 [thread overview]
Message-ID: <1317807988.6766.10.camel@twins> (raw)
In-Reply-To: <1317583287-18300-10-git-send-email-glommer@parallels.com>
On Sun, 2011-10-02 at 23:21 +0400, Glauber Costa wrote:
> +/*
> + * charge this task's execution time to its accounting group.
> + *
> + * called with rq->lock held.
> + */
> +static void cpuusage_charge(struct task_struct *tsk, u64 cputime)
> +{
> + int cpu;
> +
> +#ifdef CONFIG_CGROUP_CPUACCT
> + struct cpuacct *ca;
> +#endif
> +#ifdef CONFIG_CGROUP_SCHED
> + struct task_group *tg;
> +#endif
> + cpu = task_cpu(tsk);
> +
> + rcu_read_lock();
> +
> +#ifdef CONFIG_CGROUP_CPUACCT
> + ca = task_ca(tsk);
> +
> + if (unlikely(!cpuacct_subsys.active))
> + goto no_cpuacct;
> +
> + for (; ca; ca = ca->parent) {
> + u64 *cpuusage = per_cpu_ptr(ca->cpuusage, cpu);
> + *cpuusage += cputime;
> + }
> +no_cpuacct:
> +#endif
> +
> +#ifdef CONFIG_CGROUP_SCHED
> + tg = task_group(tsk);
> + for (; tg; tg = tg->parent) {
> + u64 *cpuusage = per_cpu_ptr(tg->cpuusage, cpu);
> + *cpuusage += cputime;
> + }
> +#endif
> + rcu_read_unlock();
> +}
I don't actually think we need to do this. tg->se[cpu]->sum_exec_runtime
should contain the same information.
next prev parent reply other threads:[~2011-10-05 9:46 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-02 19:21 [PATCH 00/10] Per-cgroup /proc/stat information Glauber Costa
2011-10-02 19:21 ` [PATCH 01/10] trivial: initialize root cgroup's sibling list Glauber Costa
2011-10-02 19:21 ` [PATCH 02/10] Change cpustat fields to an array Glauber Costa
2011-10-02 19:21 ` [PATCH 03/10] Move /proc/stat logic inside sched.c Glauber Costa
2011-10-02 19:21 ` [PATCH 04/10] Display /proc/stat information per cgroup Glauber Costa
2011-10-05 8:56 ` Peter Zijlstra
2011-10-05 12:10 ` Glauber Costa
2011-10-05 12:38 ` Peter Zijlstra
2011-10-05 12:43 ` Glauber Costa
2011-10-05 9:04 ` Peter Zijlstra
2011-10-05 12:11 ` Glauber Costa
2011-10-02 19:21 ` [PATCH 05/10] Make total_forks per-cgroup Glauber Costa
2011-10-05 9:05 ` Peter Zijlstra
2011-10-05 12:12 ` Glauber Costa
2011-10-11 23:45 ` Frederic Weisbecker
2011-10-12 7:35 ` Glauber Costa
2011-10-12 12:59 ` Frederic Weisbecker
2011-10-12 12:59 ` Glauber Costa
2011-10-12 13:03 ` Frederic Weisbecker
2011-10-12 13:03 ` Glauber Costa
2011-10-12 14:03 ` Frederic Weisbecker
2011-10-02 19:21 ` [PATCH 06/10] per-cgroup boot time Glauber Costa
2011-10-02 19:21 ` [PATCH 07/10] Report steal time for cgroup Glauber Costa
2011-10-02 19:21 ` [PATCH 08/10] provide a version of cpuacct statistics inside cpu cgroup Glauber Costa
2011-10-05 9:10 ` Peter Zijlstra
2011-10-05 12:16 ` Glauber Costa
2011-10-02 19:21 ` [PATCH 09/10] provide a version of cpuusage " Glauber Costa
2011-10-05 9:14 ` Peter Zijlstra
2011-10-05 12:17 ` Glauber Costa
2011-10-05 9:46 ` Peter Zijlstra [this message]
2011-10-05 12:22 ` Glauber Costa
2011-10-05 12:31 ` Peter Zijlstra
2011-10-05 15:05 ` Glauber Costa
2011-10-02 19:21 ` [PATCH 10/10] Change CPUACCT to default n Glauber Costa
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