linux-kernel - [tip:sched/core] sched/debug: Add load-tracking statistics to task

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Message-ID: <tip-939fd731eb88a0cdd9058d0b0143563172a217d7@git.kernel.org>
Date:	Thu, 27 Jun 2013 02:03:17 -0700
From:	tip-bot for Kamalesh Babulal <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	kamalesh@...ux.vnet.ibm.com, peterz@...radead.org,
	tglx@...utronix.de
Subject: [tip:sched/core] sched/debug:
  Add load-tracking statistics to task

Commit-ID:  939fd731eb88a0cdd9058d0b0143563172a217d7
Gitweb:     http://git.kernel.org/tip/939fd731eb88a0cdd9058d0b0143563172a217d7
Author:     Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>
AuthorDate: Tue, 25 Jun 2013 13:33:36 +0530
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Thu, 27 Jun 2013 10:07:46 +0200

sched/debug: Add load-tracking statistics to task

At present we print per-entity load-tracking statistics for
cfs_rq of cgroups/runqueues. Given that per task statistics
is maintained, it can be used to know the contribution made
by the task to its parenting cfs_rq level.

This patch adds per-task load-tracking statistics to /proc/<PID>/sched.

Signed-off-by: Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra <peterz@...radead.org>
Link: http://lkml.kernel.org/r/20130625080336.GA20175@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 kernel/sched/debug.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index d803989..62632098 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -566,6 +566,12 @@ void proc_sched_show_task(struct task_struct *p, struct seq_file *m)
 		   "nr_involuntary_switches", (long long)p->nivcsw);
 
 	P(se.load.weight);
+#if defined(CONFIG_SMP) && defined(CONFIG_FAIR_GROUP_SCHED)
+	P(se.avg.runnable_avg_sum);
+	P(se.avg.runnable_avg_period);
+	P(se.avg.load_avg_contrib);
+	P(se.avg.decay_count);
+#endif
 	P(policy);
 	P(prio);
 #undef PN
--
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