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scheduler.c
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Created
Wed, Apr 2, 14:59
Size
1 KB
Mime Type
text/x-c
Expires
Fri, Apr 4, 14:59 (2 d)
Engine
blob
Format
Raw Data
Handle
25307587
Attached To
R11821 phys-743-lecture
scheduler.c
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#include "timing.h"
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <omp.h>
double
verification
(
double
**
matrix
,
int
N
){
double
ret
=
0.
;
int
i
,
j
;
for
(
i
=
0
;
i
<
N
;
i
++
){
for
(
j
=
0
;
j
<
N
;
j
++
){
ret
+=
matrix
[
i
][
j
];
}
}
return
ret
;
}
int
main
()
{
int
N
,
i
,
j
,
k
;
int
mysize
,
chunk
;
double
**
A
,
**
B
,
**
C
;
double
*
A_data
,
*
B_data
,
*
C_data
;
double
t1
,
t2
;
N
=
2000
;
A_data
=
(
double
*
)
malloc
(
N
*
N
*
sizeof
(
double
));
B_data
=
(
double
*
)
malloc
(
N
*
N
*
sizeof
(
double
));
C_data
=
(
double
*
)
malloc
(
N
*
N
*
sizeof
(
double
));
A
=
(
double
**
)
malloc
(
N
*
sizeof
(
double
*
));
B
=
(
double
**
)
malloc
(
N
*
sizeof
(
double
*
));
C
=
(
double
**
)
malloc
(
N
*
sizeof
(
double
*
));
if
(
A_data
==
NULL
)
{
printf
(
"Cannot allocate A
\n
"
);
return
1
;
}
if
(
B_data
==
NULL
)
{
printf
(
"Cannot allocate B
\n
"
);
return
1
;
}
if
(
C_data
==
NULL
)
{
printf
(
"Cannot allocate C
\n
"
);
return
1
;
}
for
(
i
=
0
;
i
<
(
N
*
N
);
i
++
)
{
A_data
[
i
]
=
1.0
;
B_data
[
i
]
=
2.0
;
C_data
[
i
]
=
0.0
;
}
for
(
i
=
0
;
i
<
N
;
i
++
){
A
[
i
]
=
A_data
+
i
*
N
;
B
[
i
]
=
B_data
+
i
*
N
;
C
[
i
]
=
C_data
+
i
*
N
;
}
t1
=
second
();
#pragma omp parallel shared(A, B, C) private(i, j, k)
{
mysize
=
omp_get_num_threads
();
chunk
=
(
N
/
mysize
);
#pragma omp for schedule(static, chunk)
for
(
i
=
0
;
i
<
N
;
i
++
)
{
for
(
j
=
0
;
j
<
N
;
j
++
)
{
for
(
k
=
0
;
k
<
N
;
k
++
)
{
C
[
i
][
j
]
=
C
[
i
][
j
]
+
A
[
i
][
k
]
*
B
[
k
][
j
];
}
}
}
}
t2
=
second
();
printf
(
"[IJK] Nb cores [-] : %i
\n
"
,
(
mysize
));
printf
(
"[IJK] Compute time [s] : %6.3f
\n
"
,
(
t2
-
t1
));
printf
(
"[IJK] Performance [GF/s]: %6.3f
\n
"
,
((
pow
((
double
)
N
,
3.
)
*
2.0
)
/
((
t2
-
t1
)
*
1.e9
)));
printf
(
"[IJK] Verification : %6.3f
\n\n
"
,
verification
(
C
,
N
));
free
(
A
);
free
(
B
);
free
(
C
);
free
(
A_data
);
free
(
B_data
);
free
(
C_data
);
return
0
;
}
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