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| author | Ken Chen <kenchen@google.com> | 2008-12-16 23:41:22 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-12-18 13:54:01 +0100 |
| commit | 9c2c48020ec0dd6ecd27e5a1298f73b40d85a595 (patch) | |
| tree | 1a44f56e18012120aff0969094eebd572deb2ea3 /kernel/delayacct.c | |
| parent | e9515c3c9feecd74174c2998add0db51e02abb8d (diff) | |
| download | lwn-9c2c48020ec0dd6ecd27e5a1298f73b40d85a595.tar.gz lwn-9c2c48020ec0dd6ecd27e5a1298f73b40d85a595.zip | |
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>
Diffstat (limited to 'kernel/delayacct.c')
| -rw-r--r-- | kernel/delayacct.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/delayacct.c b/kernel/delayacct.c index b3179dad71be..abb6e17505e2 100644 --- a/kernel/delayacct.c +++ b/kernel/delayacct.c @@ -127,7 +127,7 @@ int __delayacct_add_tsk(struct taskstats *d, struct task_struct *tsk) */ t1 = tsk->sched_info.pcount; t2 = tsk->sched_info.run_delay; - t3 = tsk->sched_info.cpu_time; + t3 = tsk->se.sum_exec_runtime; d->cpu_count += t1; |