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PTASK
rtgpgpu
Commits
39f38a62
Commit
39f38a62
authored
5 years ago
by
rtekin
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scheduler primitives - to complete
parent
a2f29a62
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src/scheduler.cu
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src/scheduler.cu
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39f38a62
#include
<cuda.h>
##include "rtkernel.hpp"
/****************** TYPE DEFINITION ******************/
stuct
p_kernel
{
kernel_t
kernel
;
int
priority
;
int
gridsize
;
int
blocksize
;
int
period
;
void
*
arg
;
};
typedef
struct
p_kernel
p_kernel_t
;
typedef
int
policy_t
;
/*
* define a new type `scheduler_t`, a data structure for 2 informations :
+ a kernel execution (and eventually memory operations) control method
(one of the actual 3 strategies)
+ a scheduling policy
*/
struct
scheduler
{
policy_t
policy
;
method_t
method
;
};
typedef
struct
scheduler
scheduler_t
;
/****************** VARIABLE DEFINITION ******************/
static
hash_set
<
p_kernel_t
>
addedKernel
;
/* Associates priority to the list of kernels to launch on the GPU
that have this priority
*/
static
map
<
int
,
list
<
p_kernel_t
>
>
kernelsToLaunch
;
/*! qu'il n'y ai pas de getjob avant le remove -> semaphore ?*/
/* A var to contains the following informations :
- GPU task scheduling policy
- kernel execution control strategy
*/
static
scheduler_t
scheduler
;
/****************** METHOD DEFINITION ******************/
void
removeJob
(
kernel_t
kernelToRemove
){
//lock
//-> supprime kernelToRemove de la liste correspondante à sa prio
//si cette liste devient vide supprime la paire (prio, liste)
//unlock
return
;
}
p_kernel_t
getJob
(){
p_kernel_t
pkernel
;
/*according to the scheduling policy contained in scheduler.policy :
switch (scheduler.policy) ...
*/
switch
(
scheduler
.
method
)
{
case
SAMESTREAM
:
//lock
//SI kernelsToLaunch non vide et kernelsToLaunch.begin()->second non vide
pkernel
=
kernelsToLaunch
.
begin
()
->
second
.
begin
();
//unlock
removeJob
(
pkernel
);
break
;
case
SEVERALSTREAMS
:
break
;
case
CHOSENSM
:
break
;
default:
fprintf
(
stderr
,
"ERROR : INVALID strategy, i.e not one of : %s
\n
"
,
"SAMESTREAM, SEVERALSTREAMS"
);
exit
(
-
1
);
}
return
pkernel
;
}
void
*
launchKernels
(
void
*
arg
){
p_kernel_t
pkernel
;
while
(
1
)
{
pkernel
=
getJob
();
pkernel
.
kernel
<<<
pkernel
.
gridsize
,
pkernel
.
blocksize
,
0
,
getStream
()
>>>
(
pkernel
.
arg
);
}
}
void
suscribe
(
/*kernel_t kernel, int priority*/
p_kernel_t
*
pk
){
switch
(
scheduler
.
method
)
{
case
SAMESTREAM
:
kernelsToLaunch
[
priority
].
push_back
(
pkernel
);
break
;
case
SEVERALSTREAMS
:
break
;
case
CHOSENSM
:
break
;
default:
fprintf
(
stderr
,
"ERROR : INVALID strategy, i.e not one of : %s
\n
"
,
"SAMESTREAM, SEVERALSTREAMS"
);
exit
(
-
1
);
}
//il y a consommer
return
;
}
void
*
pruda_task
(
void
*
arg
){
struct
timespec
next
;
p_kernel_t
*
pk
=
(
p_kernel_t
*
)
arg
;
while
(
1
){
clock_gettime
(
CLOCK_MONOTONIC
,
&
next
);
suscribe
(
/*pk->kernel, pk->priority*/
pk
);
timespec_addto
(
next
,
pk
->
period
);
clock_nanosleep
(
CLOCK_MONOTONIC
,
0
,
&
next
,
0
);
}
}
void
start_kernels
(
scheduler_t
scheduler
){
//lance les threads cpu pruda_task et lauchKernels -> un thread de chaque
// par p_kernel_t de `addedKernel`
}
void
init_scheduler
(
method_t
method
,
policy_t
policy
;){
scheduler
.
method
=
method
;
scheduler
.
policy
=
policy
;
start_kernels
(
scheduler
);
}
void
addRtKernel
(
kernel_t
kernel
,
int
priority
,
int
gridsize
,
int
blocksize
,
int
period
,
void
*
arg
)
{
p_kernel_t
pkernel
;
pkernel
.
kernel
=
kernel
;
pkernel
.
priority
=
priority
;
pkernel
.
gridsize
=
gridsize
;
pkernel
.
blocksize
=
blocksize
;
pkernel
.
period
=
period
;
pkernel
.
arg
=
arg
;
addedKernel
.
insert
(
pkernel
);
return
;
}
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