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gather_unroll.hpp
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rLAMMPS lammps
gather_unroll.hpp
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/*
//@HEADER
// ************************************************************************
//
// Kokkos v. 2.0
// Copyright (2014) Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Questions? Contact H. Carter Edwards (hcedwar@sandia.gov)
//
// ************************************************************************
//@HEADER
*/
#include<Kokkos_Core.hpp>
#include<Kokkos_Random.hpp>
template
<
class
Scalar
>
struct
RunGather
<
Scalar
,
UNROLL
>
{
static
void
run
(
int
N
,
int
K
,
int
D
,
int
R
,
int
F
)
{
Kokkos
::
View
<
int
**>
connectivity
(
"Connectivity"
,
N
,
K
);
Kokkos
::
View
<
Scalar
*>
A_in
(
"Input"
,
N
);
Kokkos
::
View
<
Scalar
*>
B_in
(
"Input"
,
N
);
Kokkos
::
View
<
Scalar
*>
C
(
"Output"
,
N
);
Kokkos
::
Random_XorShift64_Pool
<>
rand_pool
(
12313
);
Kokkos
::
deep_copy
(
A_in
,
1.5
);
Kokkos
::
deep_copy
(
B_in
,
2.0
);
Kokkos
::
View
<
const
Scalar
*
,
Kokkos
::
MemoryTraits
<
Kokkos
::
RandomAccess
>
>
A
(
A_in
);
Kokkos
::
View
<
const
Scalar
*
,
Kokkos
::
MemoryTraits
<
Kokkos
::
RandomAccess
>
>
B
(
B_in
);
Kokkos
::
parallel_for
(
"InitKernel"
,
N
,
KOKKOS_LAMBDA
(
const
int
&
i
)
{
auto
rand_gen
=
rand_pool
.
get_state
();
for
(
int
jj
=
0
;
jj
<
K
;
jj
++
)
{
connectivity
(
i
,
jj
)
=
(
rand_gen
.
rand
(
D
)
+
i
-
D
/
2
+
N
)
%
N
;
}
rand_pool
.
free_state
(
rand_gen
);
});
Kokkos
::
fence
();
Kokkos
::
Timer
timer
;
for
(
int
r
=
0
;
r
<
R
;
r
++
)
{
Kokkos
::
parallel_for
(
"BenchmarkKernel"
,
N
,
KOKKOS_LAMBDA
(
const
int
&
i
)
{
Scalar
c
=
Scalar
(
0.0
);
for
(
int
jj
=
0
;
jj
<
K
;
jj
++
)
{
const
int
j
=
connectivity
(
i
,
jj
);
Scalar
a1
=
A
(
j
);
const
Scalar
b
=
B
(
j
);
#if(UNROLL>1)
Scalar
a2
=
a1
*
Scalar
(
1.3
);
#endif
#if(UNROLL>2)
Scalar
a3
=
a2
*
Scalar
(
1.1
);
#endif
#if(UNROLL>3)
Scalar
a4
=
a3
*
Scalar
(
1.1
);
#endif
#if(UNROLL>4)
Scalar
a5
=
a4
*
Scalar
(
1.3
);
#endif
#if(UNROLL>5)
Scalar
a6
=
a5
*
Scalar
(
1.1
);
#endif
#if(UNROLL>6)
Scalar
a7
=
a6
*
Scalar
(
1.1
);
#endif
#if(UNROLL>7)
Scalar
a8
=
a7
*
Scalar
(
1.1
);
#endif
for
(
int
f
=
0
;
f
<
F
;
f
++
)
{
a1
+=
b
*
a1
;
#if(UNROLL>1)
a2
+=
b
*
a2
;
#endif
#if(UNROLL>2)
a3
+=
b
*
a3
;
#endif
#if(UNROLL>3)
a4
+=
b
*
a4
;
#endif
#if(UNROLL>4)
a5
+=
b
*
a5
;
#endif
#if(UNROLL>5)
a6
+=
b
*
a6
;
#endif
#if(UNROLL>6)
a7
+=
b
*
a7
;
#endif
#if(UNROLL>7)
a8
+=
b
*
a8
;
#endif
}
#if(UNROLL==1)
c
+=
a1
;
#endif
#if(UNROLL==2)
c
+=
a1
+
a2
;
#endif
#if(UNROLL==3)
c
+=
a1
+
a2
+
a3
;
#endif
#if(UNROLL==4)
c
+=
a1
+
a2
+
a3
+
a4
;
#endif
#if(UNROLL==5)
c
+=
a1
+
a2
+
a3
+
a4
+
a5
;
#endif
#if(UNROLL==6)
c
+=
a1
+
a2
+
a3
+
a4
+
a5
+
a6
;
#endif
#if(UNROLL==7)
c
+=
a1
+
a2
+
a3
+
a4
+
a5
+
a6
+
a7
;
#endif
#if(UNROLL==8)
c
+=
a1
+
a2
+
a3
+
a4
+
a5
+
a6
+
a7
+
a8
;
#endif
}
C
(
i
)
=
c
;
});
Kokkos
::
fence
();
}
double
seconds
=
timer
.
seconds
();
double
bytes
=
1.0
*
N
*
K
*
R
*
(
2
*
sizeof
(
Scalar
)
+
sizeof
(
int
))
+
1.0
*
N
*
R
*
sizeof
(
Scalar
);
double
flops
=
1.0
*
N
*
K
*
R
*
(
F
*
2
*
UNROLL
+
2
*
(
UNROLL
-
1
));
double
gather_ops
=
1.0
*
N
*
K
*
R
*
2
;
printf
(
"SNKDRUF: %i %i %i %i %i %i %i Time: %lfs Bandwidth: %lfGiB/s GFlop/s: %lf GGather/s: %lf
\n
"
,
sizeof
(
Scalar
)
/
4
,
N
,
K
,
D
,
R
,
UNROLL
,
F
,
seconds
,
1.0
*
bytes
/
seconds
/
1024
/
1024
/
1024
,
1.e-9
*
flops
/
seconds
,
1.e-9
*
gather_ops
/
seconds
);
}
};
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