Re: [PATCH RFC] sched/deadline: Use the revised wakeup rule for suspending constrained dl tasks

[Daniel Bristot de Oliveira]

On 04/24/2017 05:18 PM, Daniel Bristot de Oliveira wrote:
>   remaining runtime = 4
>   laxity = 5
Oops! The laxity is 5... so...

> Knowing the laxity of a task (deadline - t), it is possible to move
> it to the other side of the equality, thus enabling to define max
> remaining runtime a task can use within the absolute deadline, without
> over-running the allowed density:
> 
>   runtime = (dl_runtime / dl_deadline) * (deadline - t)
> 
> For instance, in our previous example, the task could still run:
> 
>   runtime = ( 5 / 7 ) * 4
>   runtime = 2.85 ms

This should be:
    runtime = ( 5 / 7 ) * 5
    runtime = 3.57 ms

even better :-)

-- Daniel