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[RFC 6/8] GRUB accounting

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  [RFC 6/8] GRUB accounting Luca Abeni <luca.abeni@unitn.it> - 2016-01-14 16:30 +0100
    Re: [RFC 6/8] GRUB accounting Peter Zijlstra <peterz@infradead.org> - 2016-01-14 21:00 +0100
      Re: [RFC 6/8] GRUB accounting Luca Abeni <luca.abeni@unitn.it> - 2016-01-15 09:10 +0100

#1309385 — [RFC 6/8] GRUB accounting

---
 kernel/sched/deadline.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index 15d3fd8..4795d7f 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -823,6 +823,11 @@ int dl_runtime_exceeded(struct sched_dl_entity *dl_se)
 
 extern bool sched_rt_bandwidth_account(struct rt_rq *rt_rq);
 
+u64 grub_reclaim(u64 delta, struct rq *rq, u64 u)
+{
+	return (delta * rq->dl.running_bw) >> 20;
+}
+
 /*
  * Update the current task's runtime statistics (provided it is still
  * a -deadline task and has not been removed from the dl_rq).
@@ -859,6 +864,7 @@ static void update_curr_dl(struct rq *rq)
 
 	sched_rt_avg_update(rq, delta_exec);
 
+	delta_exec = grub_reclaim(delta_exec, rq, curr->dl.dl_bw);
 	dl_se->runtime -= dl_se->dl_yielded ? 0 : delta_exec;
 	trace_sched_stat_params_dl(curr, dl_se->runtime, dl_se->deadline);
 	if (dl_runtime_exceeded(dl_se)) {
-- 
1.9.1

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#1309615

On Thu, Jan 14, 2016 at 04:24:51PM +0100, Luca Abeni wrote:


It would be good to have a really short recap of GRUB in a comment right
about here...

> +u64 grub_reclaim(u64 delta, struct rq *rq, u64 u)
> +{
> +	return (delta * rq->dl.running_bw) >> 20;
> +}

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#1309936

On 01/14/2016 08:50 PM, Peter Zijlstra wrote:
> On Thu, Jan 14, 2016 at 04:24:51PM +0100, Luca Abeni wrote:
>
>
> It would be good to have a really short recap of GRUB in a comment right
> about here...
Ok; I'll add it


			Thanks,
				Luca

>
>> +u64 grub_reclaim(u64 delta, struct rq *rq, u64 u)
>> +{
>> +	return (delta * rq->dl.running_bw) >> 20;
>> +}

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