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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2010-07-09 15:12:27 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-07-17 12:05:44 +0200 |
| commit | 396e894d289d69bacf5acd983c97cd6e21a14c08 (patch) | |
| tree | ec3e3ba19e332a799e1229f62663625d9c7583dd /kernel/sched.c | |
| parent | f469461df6ff822f71b8737bda86eea20f16ff93 (diff) | |
| download | linux-396e894d289d69bacf5acd983c97cd6e21a14c08.tar.bz2 | |
sched: Revert nohz_ratelimit() for now
Norbert reported that nohz_ratelimit() causes his laptop to burn about
4W (40%) extra. For now back out the change and see if we can adjust
the power management code to make better decisions.
Reported-by: Norbert Preining <preining@logic.at>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Mike Galbraith <efault@gmx.de>
Cc: Arjan van de Ven <arjan@infradead.org>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched.c')
| -rw-r--r-- | kernel/sched.c | 10 |
1 files changed, 0 insertions, 10 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index f52a8801b7a2..63b4a14682fa 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -1232,16 +1232,6 @@ void wake_up_idle_cpu(int cpu) smp_send_reschedule(cpu); } -int nohz_ratelimit(int cpu) -{ - struct rq *rq = cpu_rq(cpu); - u64 diff = rq->clock - rq->nohz_stamp; - - rq->nohz_stamp = rq->clock; - - return diff < (NSEC_PER_SEC / HZ) >> 1; -} - #endif /* CONFIG_NO_HZ */ static u64 sched_avg_period(void) |