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SWIFT
SWIFTsim
Commits
cfb3df9a
Commit
cfb3df9a
authored
Dec 01, 2016
by
James Willis
Browse files
Store vectorised results and compare with the brute force version to check accuracy.
parent
a78b4209
Changes
1
Hide whitespace changes
Inline
Side-by-side
tests/test27cells.c
View file @
cfb3df9a
...
...
@@ -30,6 +30,8 @@
/* Local headers. */
#include
"swift.h"
#define ACC_THRESHOLD 1e-5
enum
velocity_types
{
velocity_zero
,
velocity_random
,
...
...
@@ -254,6 +256,26 @@ void dump_particle_fields(char *fileName, struct cell *main_cell,
fclose
(
file
);
}
/**
* @brief Compares the vectorised result against
* the serial result of the interaction.
*
* @param serial_parts Particle array that has been interacted serially
* @param vec_parts Particle array to be interacted using vectors
* @param count No. of particles that have been interacted
* @param threshold Level of accuracy needed
*
* @return Non-zero value if difference found, 0 otherwise
*/
int
check_results
(
struct
part
*
serial_parts
,
struct
part
*
vec_parts
,
int
count
,
double
threshold
)
{
int
result
=
0
;
for
(
int
i
=
0
;
i
<
count
;
i
++
)
result
+=
compare_particles
(
serial_parts
[
i
],
vec_parts
[
i
],
threshold
);
return
result
;
}
/* Just a forward declaration... */
void
runner_dopair1_density
(
struct
runner
*
r
,
struct
cell
*
ci
,
struct
cell
*
cj
);
void
runner_doself1_density
(
struct
runner
*
r
,
struct
cell
*
ci
);
...
...
@@ -264,6 +286,7 @@ int main(int argc, char *argv[]) {
size_t
runs
=
0
,
particles
=
0
;
double
h
=
1
.
23485
,
size
=
1
.,
rho
=
1
.;
double
perturbation
=
0
.;
double
threshold
=
ACC_THRESHOLD
;
char
outputFileNameExtension
[
200
]
=
""
;
char
outputFileName
[
200
]
=
""
;
enum
velocity_types
vel
=
velocity_zero
;
...
...
@@ -279,7 +302,7 @@ int main(int argc, char *argv[]) {
srand
(
0
);
char
c
;
while
((
c
=
getopt
(
argc
,
argv
,
"m:s:h:n:r:t:d:f:v:"
))
!=
-
1
)
{
while
((
c
=
getopt
(
argc
,
argv
,
"m:s:h:n:r:t:d:f:v:
a:
"
))
!=
-
1
)
{
switch
(
c
)
{
case
'h'
:
sscanf
(
optarg
,
"%lf"
,
&
h
);
...
...
@@ -305,6 +328,9 @@ int main(int argc, char *argv[]) {
case
'v'
:
sscanf
(
optarg
,
"%d"
,
(
int
*
)
&
vel
);
break
;
case
'a'
:
sscanf
(
optarg
,
"%lf"
,
&
threshold
);
break
;
case
'?'
:
error
(
"Unknown option."
);
break
;
...
...
@@ -411,6 +437,11 @@ int main(int argc, char *argv[]) {
}
}
/* Store the vectorised particle results. */
struct
part
vec_parts
[
main_cell
->
count
];
for
(
int
i
=
0
;
i
<
main_cell
->
count
;
i
++
)
vec_parts
[
i
]
=
main_cell
->
parts
[
i
];
/* Output timing */
message
(
"SWIFT calculation took : %15lli ticks."
,
time
/
runs
);
...
...
@@ -441,6 +472,10 @@ int main(int argc, char *argv[]) {
sprintf
(
outputFileName
,
"brute_force_27_%s.dat"
,
outputFileNameExtension
);
dump_particle_fields
(
outputFileName
,
main_cell
,
cells
);
/* Check serial results against the vectorised results. */
if
(
check_results
(
main_cell
->
parts
,
vec_parts
,
main_cell
->
count
,
threshold
))
message
(
"Differences found..."
);
/* Output timing */
message
(
"Brute force calculation took : %15lli ticks."
,
toc
-
tic
);
...
...
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