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| author |   Ingo Molnar <mingo@elte.hu> | 2009-09-10 20:52:09 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-09-10 20:52:54 +0200 |
| commit | e1f8450854d69f0291882804406ea1bab3ca44b4 (patch) | |
| tree | 606e2176f7654269de904b15aad9491912db4093 /kernel | |
| parent | sched: Disable NEW_FAIR_SLEEPERS for now (diff) | |
| download | linux-dev-e1f8450854d69f0291882804406ea1bab3ca44b4.tar.xz linux-dev-e1f8450854d69f0291882804406ea1bab3ca44b4.zip | |
sched: Fix sched::sched_stat_wait tracepoint field
This weird perf trace output:
cc1-9943 [001] 2802.059479616: sched_stat_wait: task: as:9944 wait: 2801938766276 [ns]
Is caused by setting one component field of the delta to zero
a bit too early. Move it to later.
( Note, this does not affect the NEW_FAIR_SLEEPERS interactivity bug,
it's just a reporting bug in essence. )
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Nikos Chantziaras <realnc@arcor.de>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Mike Galbraith <efault@gmx.de>
LKML-Reference: <4AA93D34.8040500@arcor.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched_fair.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index 26fadb44250c..aa7f84121016 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -545,14 +545,13 @@ update_stats_wait_end(struct cfs_rq *cfs_rq, struct sched_entity *se) schedstat_set(se->wait_count, se->wait_count + 1); schedstat_set(se->wait_sum, se->wait_sum + rq_of(cfs_rq)->clock - se->wait_start); - schedstat_set(se->wait_start, 0); - #ifdef CONFIG_SCHEDSTATS if (entity_is_task(se)) { trace_sched_stat_wait(task_of(se), rq_of(cfs_rq)->clock - se->wait_start); } #endif + schedstat_set(se->wait_start, 0); } static inline void |