Messages in this thread Patch in this message | | | Date | Mon, 3 Aug 2015 10:11:02 -0700 | From | tip-bot for Vincent Guittot <> | Subject | [tip:sched/core] sched/fair: Implement update_blocked_averages() for CONFIG_FAIR_GROUP_SCHED=n |
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Commit-ID: 6c1d47c0827304949e0eb9479f4d587f226fac8b Gitweb: http://git.kernel.org/tip/6c1d47c0827304949e0eb9479f4d587f226fac8b Author: Vincent Guittot <vincent.guittot@linaro.org> AuthorDate: Wed, 15 Jul 2015 08:04:38 +0800 Committer: Ingo Molnar <mingo@kernel.org> CommitDate: Mon, 3 Aug 2015 12:24:28 +0200
sched/fair: Implement update_blocked_averages() for CONFIG_FAIR_GROUP_SCHED=n
The load and the utilization of idle CPUs must be updated periodically in order to decay the blocked part.
If CONFIG_FAIR_GROUP_SCHED is not set, the load and util of idle cpus are not decayed and stay at the values set before becoming idle.
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org> Signed-off-by: Yuyang Du <yuyang.du@intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: arjan@linux.intel.com Cc: bsegall@google.com Cc: dietmar.eggemann@arm.com Cc: fengguang.wu@intel.com Cc: len.brown@intel.com Cc: morten.rasmussen@arm.com Cc: pjt@google.com Cc: rafael.j.wysocki@intel.com Cc: umgwanakikbuti@gmail.com Link: http://lkml.kernel.org/r/1436918682-4971-4-git-send-email-yuyang.du@intel.com [ Fixed up the SOB chain. ] Signed-off-by: Ingo Molnar <mingo@kernel.org> --- kernel/sched/fair.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 01ffa95..e4b80c6 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -5846,6 +5846,14 @@ static unsigned long task_h_load(struct task_struct *p) #else static inline void update_blocked_averages(int cpu) { + struct rq *rq = cpu_rq(cpu); + struct cfs_rq *cfs_rq = &rq->cfs; + unsigned long flags; + + raw_spin_lock_irqsave(&rq->lock, flags); + update_rq_clock(rq); + update_cfs_rq_load_avg(cfs_rq_clock_task(cfs_rq), cfs_rq); + raw_spin_unlock_irqrestore(&rq->lock, flags); } static unsigned long task_h_load(struct task_struct *p)
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