Library rt.restructuring.model.readiness.jitter
(* ----------------------------------[ coqtop ]---------------------------------
Welcome to Coq 8.10.1 (October 2019)
----------------------------------------------------------------------------- *)
From mathcomp Require Export ssreflect ssrnat ssrbool eqtype fintype bigop.
From rt.restructuring.behavior Require Export all.
From rt.util Require Import nat.
We define the readiness indicator function for models with release jitter
(and no self-suspensions).
Definition of a generic type of release jitter parameter.
Consider any kind of jobs...
... and any kind of processor state.
Supose jobs have an arrival time, a cost, and a release jitter bound.
We say that a job is released at a time after its arrival if the job's
release jitter has passed.
A job that experiences jitter is ready only when the jitter-induced delay
has passed after its arrival and if it is not yet complete.
Global Program Instance jitter_ready_instance : JobReady Job PState :=
{
job_ready sched j t := is_released j t && ~~ completed_by sched j t
}.
Next Obligation.
(* ----------------------------------[ coqtop ]---------------------------------
1 subgoal (ID 65)
Job : JobType
PState : Type
H : ProcessorState Job PState
H0 : JobArrival Job
H1 : JobCost Job
H2 : JobJitter Job
sched : schedule PState
j : Job
t : instant
H3 : is_released j t && ~~ completed_by sched j t
============================
pending sched j t
----------------------------------------------------------------------------- *)
move: H3 ⇒ /andP [REL UNFINISHED].
(* ----------------------------------[ coqtop ]---------------------------------
1 subgoal (ID 122)
Job : JobType
PState : Type
H : ProcessorState Job PState
H0 : JobArrival Job
H1 : JobCost Job
H2 : JobJitter Job
sched : schedule PState
j : Job
t : instant
REL : is_released j t
UNFINISHED : ~~ completed_by sched j t
============================
pending sched j t
----------------------------------------------------------------------------- *)
rewrite /pending.
(* ----------------------------------[ coqtop ]---------------------------------
1 subgoal (ID 129)
Job : JobType
PState : Type
H : ProcessorState Job PState
H0 : JobArrival Job
H1 : JobCost Job
H2 : JobJitter Job
sched : schedule PState
j : Job
t : instant
REL : is_released j t
UNFINISHED : ~~ completed_by sched j t
============================
has_arrived j t && ~~ completed_by sched j t
----------------------------------------------------------------------------- *)
apply /andP.
(* ----------------------------------[ coqtop ]---------------------------------
1 focused subgoal
(shelved: 1) (ID 153)
Job : JobType
PState : Type
H : ProcessorState Job PState
H0 : JobArrival Job
H1 : JobCost Job
H2 : JobJitter Job
sched : schedule PState
j : Job
t : instant
REL : is_released j t
UNFINISHED : ~~ completed_by sched j t
============================
has_arrived j t /\ ~~ completed_by sched j t
----------------------------------------------------------------------------- *)
split ⇒ //.
(* ----------------------------------[ coqtop ]---------------------------------
1 subgoal (ID 155)
Job : JobType
PState : Type
H : ProcessorState Job PState
H0 : JobArrival Job
H1 : JobCost Job
H2 : JobJitter Job
sched : schedule PState
j : Job
t : instant
REL : is_released j t
UNFINISHED : ~~ completed_by sched j t
============================
has_arrived j t
----------------------------------------------------------------------------- *)
move: REL.
(* ----------------------------------[ coqtop ]---------------------------------
1 subgoal (ID 180)
Job : JobType
PState : Type
H : ProcessorState Job PState
H0 : JobArrival Job
H1 : JobCost Job
H2 : JobJitter Job
sched : schedule PState
j : Job
t : instant
UNFINISHED : ~~ completed_by sched j t
============================
is_released j t -> has_arrived j t
----------------------------------------------------------------------------- *)
rewrite /is_released /has_arrived.
(* ----------------------------------[ coqtop ]---------------------------------
1 subgoal (ID 186)
Job : JobType
PState : Type
H : ProcessorState Job PState
H0 : JobArrival Job
H1 : JobCost Job
H2 : JobJitter Job
sched : schedule PState
j : Job
t : instant
UNFINISHED : ~~ completed_by sched j t
============================
job_arrival j + job_jitter j <= t -> job_arrival j <= t
----------------------------------------------------------------------------- *)
by apply leq_addk.
(* ----------------------------------[ coqtop ]---------------------------------
No more subgoals.
----------------------------------------------------------------------------- *)
Defined.
End ReadinessOfJitteryJobs.
{
job_ready sched j t := is_released j t && ~~ completed_by sched j t
}.
Next Obligation.
(* ----------------------------------[ coqtop ]---------------------------------
1 subgoal (ID 65)
Job : JobType
PState : Type
H : ProcessorState Job PState
H0 : JobArrival Job
H1 : JobCost Job
H2 : JobJitter Job
sched : schedule PState
j : Job
t : instant
H3 : is_released j t && ~~ completed_by sched j t
============================
pending sched j t
----------------------------------------------------------------------------- *)
move: H3 ⇒ /andP [REL UNFINISHED].
(* ----------------------------------[ coqtop ]---------------------------------
1 subgoal (ID 122)
Job : JobType
PState : Type
H : ProcessorState Job PState
H0 : JobArrival Job
H1 : JobCost Job
H2 : JobJitter Job
sched : schedule PState
j : Job
t : instant
REL : is_released j t
UNFINISHED : ~~ completed_by sched j t
============================
pending sched j t
----------------------------------------------------------------------------- *)
rewrite /pending.
(* ----------------------------------[ coqtop ]---------------------------------
1 subgoal (ID 129)
Job : JobType
PState : Type
H : ProcessorState Job PState
H0 : JobArrival Job
H1 : JobCost Job
H2 : JobJitter Job
sched : schedule PState
j : Job
t : instant
REL : is_released j t
UNFINISHED : ~~ completed_by sched j t
============================
has_arrived j t && ~~ completed_by sched j t
----------------------------------------------------------------------------- *)
apply /andP.
(* ----------------------------------[ coqtop ]---------------------------------
1 focused subgoal
(shelved: 1) (ID 153)
Job : JobType
PState : Type
H : ProcessorState Job PState
H0 : JobArrival Job
H1 : JobCost Job
H2 : JobJitter Job
sched : schedule PState
j : Job
t : instant
REL : is_released j t
UNFINISHED : ~~ completed_by sched j t
============================
has_arrived j t /\ ~~ completed_by sched j t
----------------------------------------------------------------------------- *)
split ⇒ //.
(* ----------------------------------[ coqtop ]---------------------------------
1 subgoal (ID 155)
Job : JobType
PState : Type
H : ProcessorState Job PState
H0 : JobArrival Job
H1 : JobCost Job
H2 : JobJitter Job
sched : schedule PState
j : Job
t : instant
REL : is_released j t
UNFINISHED : ~~ completed_by sched j t
============================
has_arrived j t
----------------------------------------------------------------------------- *)
move: REL.
(* ----------------------------------[ coqtop ]---------------------------------
1 subgoal (ID 180)
Job : JobType
PState : Type
H : ProcessorState Job PState
H0 : JobArrival Job
H1 : JobCost Job
H2 : JobJitter Job
sched : schedule PState
j : Job
t : instant
UNFINISHED : ~~ completed_by sched j t
============================
is_released j t -> has_arrived j t
----------------------------------------------------------------------------- *)
rewrite /is_released /has_arrived.
(* ----------------------------------[ coqtop ]---------------------------------
1 subgoal (ID 186)
Job : JobType
PState : Type
H : ProcessorState Job PState
H0 : JobArrival Job
H1 : JobCost Job
H2 : JobJitter Job
sched : schedule PState
j : Job
t : instant
UNFINISHED : ~~ completed_by sched j t
============================
job_arrival j + job_jitter j <= t -> job_arrival j <= t
----------------------------------------------------------------------------- *)
by apply leq_addk.
(* ----------------------------------[ coqtop ]---------------------------------
No more subgoals.
----------------------------------------------------------------------------- *)
Defined.
End ReadinessOfJitteryJobs.