On Tue, Oct 27, 2015 at 01:57:28PM +0100, Peter Zijlstra wrote:
>
> (Excessive quoting for Olav)
>
> On Mon, Oct 26, 2015 at 06:44:48PM -0700, Joonwoo Park wrote:
> > On 10/25/2015 03:26 AM, Peter Zijlstra wrote:
>
> > > Also note that on both sites we also set TASK_ON_RQ_MIGRATING -- albeit
> >
(Excessive quoting for Olav)
On Mon, Oct 26, 2015 at 06:44:48PM -0700, Joonwoo Park wrote:
> On 10/25/2015 03:26 AM, Peter Zijlstra wrote:
> > Also note that on both sites we also set TASK_ON_RQ_MIGRATING -- albeit
> > late. Can't you simply set that earlier (and back to QUEUED later) and
> > te
On 10/25/2015 03:26 AM, Peter Zijlstra wrote:
> On Sat, Oct 24, 2015 at 10:23:14PM -0700, Joonwoo Park wrote:
>> @@ -1069,7 +1069,7 @@ static struct rq *move_queued_task(struct rq *rq,
>> struct task_struct *p, int new
>> {
>> lockdep_assert_held(&rq->lock);
>>
>> -dequeue_task(rq, p,
On Sat, Oct 24, 2015 at 10:23:14PM -0700, Joonwoo Park wrote:
> @@ -1069,7 +1069,7 @@ static struct rq *move_queued_task(struct rq *rq,
> struct task_struct *p, int new
> {
> lockdep_assert_held(&rq->lock);
>
> - dequeue_task(rq, p, 0);
> + dequeue_task(rq, p, DEQUEUE_MIGRATING);
On Sat, Oct 24, 2015 at 10:23:14PM -0700, Joonwoo Park wrote:
> At present scheduler resets task's wait start timestamp when the task
> migrates to another rq. This misleads scheduler itself into reporting
> less wait time than actual by omitting time spent for waiting prior to
> migration and als
At present scheduler resets task's wait start timestamp when the task
migrates to another rq. This misleads scheduler itself into reporting
less wait time than actual by omitting time spent for waiting prior to
migration and also more wait count than actual by counting migration as
wait end event
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