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CodeursIntensifs
GrayScott
GrayScottSyclSetup
Commits
d3d6d2e8
Commit
d3d6d2e8
authored
1 year ago
by
CHAMONT David
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parent
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GrayScottChatGpt/chatgpt-grayscott-sycl.cpp
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GrayScottChatGpt/chatgpt-grayscott-sycl.cpp
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GrayScottChatGpt/chatgpt-grayscott-sycl.cpp
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#include
<CL/sycl.hpp>
#include
<iostream>
#include
<vector>
namespace
sycl
=
cl
::
sycl
;
// Définition des constantes de l'équation de Gray-Scott
constexpr
double
Du
=
0.02
;
constexpr
double
Dv
=
0.01
;
constexpr
double
F
=
0.04
;
constexpr
double
k
=
0.06
;
constexpr
double
dt
=
0.1
;
// Fonction pour initialiser les données
void
initializeData
(
std
::
vector
<
double
>&
u
,
std
::
vector
<
double
>&
v
,
int
size
)
{
// Initialise u et v avec des valeurs aléatoires
std
::
random_device
rd
;
std
::
mt19937
gen
(
rd
());
std
::
uniform_real_distribution
<>
dis
(
0.0
,
1.0
);
for
(
int
i
=
0
;
i
<
size
;
++
i
)
{
u
[
i
]
=
1.0
-
dis
(
gen
);
v
[
i
]
=
dis
(
gen
);
}
}
// Kernel pour mettre à jour les valeurs de u et v
class
GrayScottKernel
{
public:
GrayScottKernel
(
const
double
*
u
,
const
double
*
v
,
double
*
result_u
,
double
*
result_v
)
:
u_
(
u
),
v_
(
v
),
result_u_
(
result_u
),
result_v_
(
result_v
)
{}
void
operator
()(
sycl
::
nd_item
<
1
>
item
)
{
size_t
index
=
item
.
get_global_id
(
0
);
double
u
=
u_
[
index
];
double
v
=
v_
[
index
];
double
laplacian_u
=
0.0
;
double
laplacian_v
=
0.0
;
// Calcul du laplacien
// ...
// Mise à jour des valeurs de u et v
// ...
result_u_
[
index
]
=
u
;
result_v_
[
index
]
=
v
;
}
private
:
const
double
*
u_
;
const
double
*
v_
;
double
*
result_u_
;
double
*
result_v_
;
};
int
main
()
{
const
int
size
=
1000
;
std
::
vector
<
double
>
u
(
size
);
std
::
vector
<
double
>
v
(
size
);
initializeData
(
u
,
v
,
size
);
// Création de l'environnement SYCL
sycl
::
default_selector
selector
;
sycl
::
queue
queue
(
selector
);
// Allocation des buffers SYCL pour les données
sycl
::
buffer
<
double
>
uBuf
(
u
.
data
(),
sycl
::
range
<
1
>
(
size
));
sycl
::
buffer
<
double
>
vBuf
(
v
.
data
(),
sycl
::
range
<
1
>
(
size
));
sycl
::
buffer
<
double
>
resultUBuf
(
u
.
data
(),
sycl
::
range
<
1
>
(
size
));
sycl
::
buffer
<
double
>
resultVBuf
(
v
.
data
(),
sycl
::
range
<
1
>
(
size
));
// Lancement du kernel
queue
.
submit
([
&
](
sycl
::
handler
&
cgh
)
{
auto
uAcc
=
uBuf
.
get_access
<
sycl
::
access
::
mode
::
read
>
(
cgh
);
auto
vAcc
=
vBuf
.
get_access
<
sycl
::
access
::
mode
::
read
>
(
cgh
);
auto
resultUAcc
=
resultUBuf
.
get_access
<
sycl
::
access
::
mode
::
write
>
(
cgh
);
auto
resultVAcc
=
resultVBuf
.
get_access
<
sycl
::
access
::
mode
::
write
>
(
cgh
);
cgh
.
parallel_for
<
sycl
::
range
<
1
>>
(
sycl
::
range
<
1
>
(
size
),
GrayScottKernel
(
uAcc
.
get_pointer
(),
vAcc
.
get_pointer
(),
resultUAcc
.
get_pointer
(),
resultVAcc
.
get_pointer
()));
});
// Copie des résultats de retour du buffer SYCL vers le vecteur
queue
.
wait
();
resultUBuf
.
get_access
<
sycl
::
access
::
mode
::
read
>
().
memcpy
(
u
.
data
(),
size
*
sizeof
(
double
));
resultVBuf
.
get_access
<
sycl
::
access
::
mode
::
read
>
().
memcpy
(
v
.
data
(),
size
*
sizeof
(
double
));
// Affichage des résultats
for
(
int
i
=
0
;
i
<
size
;
++
i
)
{
std
::
cout
<<
"u["
<<
i
<<
"] = "
<<
u
[
i
]
<<
", v["
<<
i
<<
"] = "
<<
v
[
i
]
<<
std
::
endl
;
}
return
0
;
}
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