Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751822AbdL0MhU (ORCPT ); Wed, 27 Dec 2017 07:37:20 -0500 Received: from mail-pl0-f68.google.com ([209.85.160.68]:37559 "EHLO mail-pl0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750967AbdL0MhT (ORCPT ); Wed, 27 Dec 2017 07:37:19 -0500 X-Google-Smtp-Source: ACJfBovErHS3dqv9Ym4QNs9e5S0Uk2XxvlBdSR/t9HN0uVDvCeyA8ll4tYrCYSX7albEFwuCMJafIQ== From: Yafang Shao To: mingo@redhat.com, peterz@infradead.org Cc: linux-kernel@vger.kernel.org, Yafang Shao Subject: [PATCH] sched: cgroup: export nr_running for each cpu cgroup Date: Wed, 27 Dec 2017 20:37:01 +0800 Message-Id: <1514378221-11020-1-git-send-email-laoar.shao@gmail.com> X-Mailer: git-send-email 1.8.3.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1231 Lines: 38 Export the nr_running for each cpu cgroup could help us monitor the container conveniently. The total threads of cpu cgroup could be got from the tasks file, and it could also be got from pids subsystem. But we still donot know how many processes are running in a container, only if we traversal the status of all processes, that's a little expensive. Hence export the nr_running. Signed-off-by: Yafang Shao --- kernel/sched/core.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 644fa2e..926575a 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -6648,10 +6648,17 @@ static int cpu_cfs_stat_show(struct seq_file *sf, void *v) { struct task_group *tg = css_tg(seq_css(sf)); struct cfs_bandwidth *cfs_b = &tg->cfs_bandwidth; + unsigned int nr_running = 0; + int cpu; + + for_each_online_cpu(cpu) + if (tg->cfs_rq[cpu]) + nr_running += tg->cfs_rq[cpu]->h_nr_running; seq_printf(sf, "nr_periods %d\n", cfs_b->nr_periods); seq_printf(sf, "nr_throttled %d\n", cfs_b->nr_throttled); seq_printf(sf, "throttled_time %llu\n", cfs_b->throttled_time); + seq_printf(sf, "nr_running %u\n", nr_running); return 0; } -- 1.8.3.1