Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1184405

[PATCH v10 3/7] sched: Implement update_blocked_averages() for CONFIG_FAIR_GROUP_SCHED=n

Show all headers | View raw

The load and the util 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>
Reviewed-by: Yuyang Du <yuyang.du@intel.com>
---
 kernel/sched/fair.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 452c932..3e9bccf 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -5877,6 +5877,16 @@ 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)
-- 
2.1.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

[PATCH v10 0/7] sched: Rewrite runnable load and utilization average tracking  Yuyang Du <yuyang.du@intel.com> - 2015-07-15 10:00 +0200
  [PATCH v10 7/7] sched: Clean up load average references Yuyang Du <yuyang.du@intel.com> - 2015-07-15 10:00 +0200
  [PATCH v10 1/7] sched: Remove rq's runnable avg Yuyang Du <yuyang.du@intel.com> - 2015-07-15 10:00 +0200
  [PATCH v10 4/7] sched: Init cfs_rq's sched_entity load average Yuyang Du <yuyang.du@intel.com> - 2015-07-15 10:00 +0200
  [PATCH v10 6/7] sched: Provide runnable_load_avg back to cfs_rq Yuyang Du <yuyang.du@intel.com> - 2015-07-15 10:00 +0200
  [PATCH v10 5/7] sched: Remove task and group entity load when they are dead Yuyang Du <yuyang.du@intel.com> - 2015-07-15 10:00 +0200
  [PATCH v10 3/7] sched: Implement update_blocked_averages() for CONFIG_FAIR_GROUP_SCHED=n Yuyang Du <yuyang.du@intel.com> - 2015-07-15 10:00 +0200

csiph-web