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Commit
34b6f852
authored
May 27, 2015
by
Maxime Chéramy
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update G-EDF implementation.
parent
a80e5063
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2 changed files
with
9 additions
and
17 deletions
+9
-17
simso/schedulers/EDF.py
+8
-16
simso/schedulers/EDF2.py
+1
-1
No files found.
simso/schedulers/EDF.py
View file @
34b6f852
...
...
@@ -7,27 +7,20 @@ from simso.core import Scheduler
class
EDF
(
Scheduler
):
"""Earliest Deadline First"""
def
init
(
self
):
self
.
ready_list
=
[]
def
on_activate
(
self
,
job
):
self
.
ready_list
.
append
(
job
)
job
.
cpu
.
resched
()
def
on_terminated
(
self
,
job
):
if
job
in
self
.
ready_list
:
self
.
ready_list
.
remove
(
job
)
else
:
job
.
cpu
.
resched
()
job
.
cpu
.
resched
()
def
schedule
(
self
,
cpu
):
ready_jobs
=
[
j
for
j
in
self
.
ready_list
if
j
.
is_active
()]
# List of ready jobs not currently running:
ready_jobs
=
[
t
.
job
for
t
in
self
.
task_list
if
t
.
is_active
()
and
not
t
.
job
.
is_running
()]
if
ready_jobs
:
# Key explanations:
# First the free processors
# Among the others, get the one with the greatest deadline
# If equal, take the one used to schedule
# Select a free processor or, if none,
# the one with the greatest deadline (self in case of equality):
key
=
lambda
x
:
(
1
if
not
x
.
running
else
0
,
x
.
running
.
absolute_deadline
if
x
.
running
else
0
,
...
...
@@ -35,11 +28,10 @@ class EDF(Scheduler):
)
cpu_min
=
max
(
self
.
processors
,
key
=
key
)
# Select the job with the least priority:
job
=
min
(
ready_jobs
,
key
=
lambda
x
:
x
.
absolute_deadline
)
if
(
cpu_min
.
running
is
None
or
cpu_min
.
running
.
absolute_deadline
>
job
.
absolute_deadline
):
self
.
ready_list
.
remove
(
job
)
if
cpu_min
.
running
:
self
.
ready_list
.
append
(
cpu_min
.
running
)
print
(
self
.
sim
.
now
(),
job
.
name
,
cpu_min
.
name
)
return
(
job
,
cpu_min
)
simso/schedulers/EDF2.py
View file @
34b6f852
"""
Implementation of the Global-EDF (Earliest Deadline First) for multiprocessor
architectures.
architectures
(alternative implementation as the one provided by EDF.py)
.
"""
from
simso.core
import
Scheduler
...
...
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