Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753006Ab2KTIcu (ORCPT ); Tue, 20 Nov 2012 03:32:50 -0500 Received: from mailhub.sw.ru ([195.214.232.25]:9471 "EHLO relay.sw.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752949Ab2KTIcr (ORCPT ); Tue, 20 Nov 2012 03:32:47 -0500 From: Glauber Costa To: Cc: , Peter Zijlstra , Paul Turner , Balbir Singh , Tejun Heo , , Glauber Costa , Dave Jones , Ben Hutchings , Lennart Poettering , Kay Sievers Subject: [PATCH 5/6] sched: adjust exec_clock to use it as cpu usage metric Date: Tue, 20 Nov 2012 12:32:03 +0400 Message-Id: <1353400324-10897-6-git-send-email-glommer@parallels.com> X-Mailer: git-send-email 1.7.11.7 In-Reply-To: <1353400324-10897-1-git-send-email-glommer@parallels.com> References: <1353400324-10897-1-git-send-email-glommer@parallels.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1962 Lines: 62 exec_clock already provides per-group cpu usage metrics, and can be reused by cpuacct in case cpu and cpuacct are comounted. However, it is only provided by tasks in fair class. Doing the same for rt is easy, and can be done in an already existing hierarchy loop. This is an improvement over the independent hierarchy walk executed by cpuacct. Signed-off-by: Glauber Costa CC: Dave Jones CC: Ben Hutchings CC: Peter Zijlstra CC: Paul Turner CC: Lennart Poettering CC: Kay Sievers CC: Tejun Heo --- kernel/sched/rt.c | 1 + kernel/sched/sched.h | 3 +++ 2 files changed, 4 insertions(+) diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c index 0c70807..68e9daf 100644 --- a/kernel/sched/rt.c +++ b/kernel/sched/rt.c @@ -945,6 +945,7 @@ static void update_curr_rt(struct rq *rq) for_each_sched_rt_entity(rt_se) { rt_rq = rt_rq_of_se(rt_se); + schedstat_add(rt_rq, exec_clock, delta_exec); if (sched_rt_runtime(rt_rq) != RUNTIME_INF) { raw_spin_lock(&rt_rq->rt_runtime_lock); diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index bc05c05..854d2e9 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -208,6 +208,7 @@ struct cfs_rq { unsigned int nr_running, h_nr_running; u64 exec_clock; + u64 prev_exec_clock; u64 min_vruntime; #ifndef CONFIG_64BIT u64 min_vruntime_copy; @@ -299,6 +300,8 @@ struct rt_rq { struct plist_head pushable_tasks; #endif int rt_throttled; + u64 exec_clock; + u64 prev_exec_clock; u64 rt_time; u64 rt_runtime; /* Nests inside the rq lock: */ -- 1.7.11.7 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/