From: Ken Chen <kenchen@google.com>
Date: Wed, 17 Dec 2008 07:41:22 +0000 (-0800)
Subject: schedstat: consolidate per-task cpu runtime stats
X-Git-Tag: v2.6.29-rc1~585^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9c2c48020ec0dd6ecd27e5a1298f73b40d85a595;p=pandora-kernel.git

schedstat: consolidate per-task cpu runtime stats

Impact: simplify code

When we turn on CONFIG_SCHEDSTATS, per-task cpu runtime is accumulated
twice. Once in task->se.sum_exec_runtime and once in sched_info.cpu_time.
These two stats are exactly the same.

Given that task->se.sum_exec_runtime is always accumulated by the core
scheduler, sched_info can reuse that data instead of duplicate the accounting.

Signed-off-by: Ken Chen <kenchen@google.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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