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authorIngo Molnar <mingo@elte.hu>2009-09-10 20:52:09 +0200
committerIngo Molnar <mingo@elte.hu>2009-09-10 20:52:54 +0200
commite1f8450854d69f0291882804406ea1bab3ca44b4 (patch)
tree606e2176f7654269de904b15aad9491912db4093 /kernel
parent3f2aa307c4d26b4ed6509d0a79e8254c9e07e921 (diff)
downloadlinux-e1f8450854d69f0291882804406ea1bab3ca44b4.tar.bz2
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.c3
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