schedstat: consolidate per-task cpu runtime stats

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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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Ken Chen 2008-12-16 23:41:22 -08:00 • committed by Ingo Molnar

parent e9515c3c9f

commit 9c2c48020e

5 changed files with 7 additions and 7 deletions

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2

kernel/delayacct.c

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2

kernel/sched.c

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5

kernel/sched_stats.h

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