Commit 858c608c authored by Matthieu Schaller's avatar Matthieu Schaller
Browse files

Added files for 27 cells test case

parent 43dc5a1b
......@@ -30,6 +30,11 @@ tests/brute_force_standard.dat
tests/swift_dopair_standard.dat
tests/brute_force_perturbed.dat
tests/swift_dopair_perturbed.dat
tests/test27cells
tests/brute_force_27_standard.dat
tests/swift_dopair_27_standard.dat
tests/brute_force_27_perturbed.dat
tests/swift_dopair_27_perturbed.dat
tests/testGreetings
tests/testReading
tests/input.hdf5
......
......@@ -21,11 +21,12 @@ AM_CFLAGS = -I../src $(HDF5_CPPFLAGS) -DTIMER
AM_LDFLAGS = ../src/.libs/libswiftsim.a $(HDF5_LDFLAGS) $(HDF5_LIBS)
# List of programs and scripts to run in the test suite
TESTS = testGreetings testReading.sh testSingle testPair.sh testPairPerturbed.sh
TESTS = testGreetings testReading.sh testSingle testPair.sh testPairPerturbed.sh \
test27cells.sh test27cellsPerturbed.sh
# List of test programs to compile
check_PROGRAMS = testGreetings testReading testSingle testTimeIntegration \
testSPHStep testPair
testSPHStep testPair test27cells
# Sources for the individual programs
testGreetings_SOURCES = testGreetings.c
......@@ -40,5 +41,8 @@ testSingle_SOURCES = testSingle.c
testPair_SOURCES = testPair.c
test27cells_SOURCES = test27cells.c
# Files necessary for distribution
EXTRA_DIST = testReading.sh makeInput.py testPair.sh testPairPerturbed.sh
EXTRA_DIST = testReading.sh makeInput.py testPair.sh testPairPerturbed.sh \
test27cells.sh test27cellsPerturbed.sh
/*******************************************************************************
* This file is part of SWIFT.
* Copyright (C) 2015 Matthieu Schaller (matthieu.schaller@durham.ac.uk).
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
******************************************************************************/
#include <fenv.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include "swift.h"
/**
* Returns a random number (uniformly distributed) in [a,b[
*/
double random_uniform(double a, double b) {
return (rand() / (double)RAND_MAX) * (a - b) + a;
}
/* n is both particles per axis and box size:
* particles are generated on a mesh with unit spacing
*/
struct cell *make_cell(size_t n, double *offset, double h,
unsigned long long *partId, double pert) {
size_t count = n * n * n;
struct cell *cell = malloc(sizeof(struct cell));
bzero(cell, sizeof(struct cell));
struct part *part;
size_t x, y, z, size;
size = count * sizeof(struct part);
if (posix_memalign((void **)&cell->parts, part_align, size) != 0) {
error("couldn't allocate particles, no. of particles: %d", (int)count);
}
bzero(cell->parts, count * sizeof(struct part));
part = cell->parts;
for (x = 0; x < n; ++x) {
for (y = 0; y < n; ++y) {
for (z = 0; z < n; ++z) {
// Add .5 for symmetry: 0.5, 1.5, 2.5 vs. 0, 1, 2
part->x[0] = x + offset[0] + 0.5 + random_uniform(-0.5, 0.5) * pert;
part->x[1] = y + offset[1] + 0.5 + random_uniform(-0.5, 0.5) * pert;
part->x[2] = z + offset[2] + 0.5 + random_uniform(-0.5, 0.5) * pert;
part->v[0] = 1.0f;
part->v[1] = 1.0f;
part->v[2] = 1.0f;
part->h = h;
part->id = ++(*partId);
part->mass = 1.0f;
part->ti_begin = 0;
part->ti_end = 1;
++part;
}
}
}
cell->split = 0;
cell->h_max = h;
cell->count = count;
cell->dx_max = 0.;
cell->h[0] = n;
cell->h[1] = n;
cell->h[2] = n;
cell->loc[0] = offset[0];
cell->loc[1] = offset[1];
cell->loc[2] = offset[2];
cell->ti_end_min = 1;
cell->ti_end_max = 1;
cell->sorted = 0;
cell->sort = NULL;
cell->sortsize = 0;
runner_dosort(NULL, cell, 0x1FFF, 0);
return cell;
}
void clean_up(struct cell *ci) {
free(ci->parts);
free(ci->sort);
free(ci);
}
/**
* @brief Initializes all particles field to be ready for a density calculation
*/
void zero_particle_fields(struct cell *c) {
for (size_t pid = 0; pid < c->count; pid++) {
c->parts[pid].rho = 0.f;
c->parts[pid].rho_dh = 0.f;
hydro_init_part(&c->parts[pid]);
}
}
/**
* @brief Dump all the particles to a file
*/
void dump_particle_fields(char *fileName, struct cell *ci, struct cell *cj) {
FILE *file = fopen(fileName, "w");
fprintf(file,
"# ID pos:[x y z] rho rho_dh wcount wcount_dh div_v curl_v:[x "
"y z]\n");
for (size_t pid = 0; pid < ci->count; pid++) {
fprintf(file, "%6llu %f %f %f %f %f %f %f %f %f %f %f\n", ci->parts[pid].id,
ci->parts[pid].x[0], ci->parts[pid].x[1], ci->parts[pid].x[2],
ci->parts[pid].rho, ci->parts[pid].rho_dh,
ci->parts[pid].density.wcount, ci->parts[pid].density.wcount_dh,
ci->parts[pid].div_v, ci->parts[pid].density.rot_v[0],
ci->parts[pid].density.rot_v[1], ci->parts[pid].density.rot_v[2]);
}
fprintf(file, "# -----------------------------------\n");
for (size_t pjd = 0; pjd < cj->count; pjd++) {
fprintf(file, "%6llu %f %f %f %f %f %f %f %f %f %f %f\n", cj->parts[pjd].id,
cj->parts[pjd].x[0], cj->parts[pjd].x[1], cj->parts[pjd].x[2],
cj->parts[pjd].rho, cj->parts[pjd].rho_dh,
cj->parts[pjd].density.wcount, cj->parts[pjd].density.wcount_dh,
cj->parts[pjd].div_v, cj->parts[pjd].density.rot_v[0],
cj->parts[pjd].density.rot_v[1], cj->parts[pjd].density.rot_v[2]);
}
fclose(file);
}
/* Just a forward declaration... */
void runner_dopair1_density(struct runner *r, struct cell *ci, struct cell *cj);
int main(int argc, char *argv[]) {
size_t particles = 0, runs = 0, volume, type = 0;
double offset[3] = {0, 0, 0}, h = 1.1255;
double perturbation = 0.1;
struct cell *ci, *cj;
struct space space;
struct engine engine;
struct runner runner;
char c;
static unsigned long long partId = 0;
char outputFileNameExtension[200] = "";
char outputFileName[200] = "";
ticks tic, toc, time;
/* Initialize CPU frequency, this also starts time. */
unsigned long long cpufreq = 0;
clocks_set_cpufreq(cpufreq);
srand(0);
while ((c = getopt(argc, argv, "h:p:r:t:d:f:")) != -1) {
switch (c) {
case 'h':
sscanf(optarg, "%lf", &h);
break;
case 'p':
sscanf(optarg, "%zu", &particles);
break;
case 'r':
sscanf(optarg, "%zu", &runs);
break;
case 't':
sscanf(optarg, "%zu", &type);
break;
case 'd':
sscanf(optarg, "%lf", &perturbation);
break;
case 'f':
strcpy(outputFileNameExtension, optarg);
break;
case '?':
error("Unknown option.");
break;
}
}
if (h < 0 || particles == 0 || runs == 0 || type > 2) {
printf(
"\nUsage: %s -p PARTICLES_PER_AXIS -r NUMBER_OF_RUNS [OPTIONS...]\n"
"\nGenerates a cell pair, filled with particles on a Cartesian grid."
"\nThese are then interacted using runner_dopair1_density."
"\n\nOptions:"
"\n-t TYPE=0 - cells share face (0), edge (1) or corner (2)"
"\n-h DISTANCE=1.1255 - smoothing length"
"\n-d pert - perturbation to apply to the particles [0,1["
"\n-f fileName - part of the file name used to save the dumps\n",
argv[0]);
exit(1);
}
space.periodic = 0;
space.h_max = h;
space.dt_step = 0.1;
engine.s = &space;
engine.time = 0.1f;
engine.ti_current = 1;
runner.e = &engine;
volume = particles * particles * particles;
message("particles: %zu B\npositions: 0 B", 2 * volume * sizeof(struct part));
ci = make_cell(particles, offset, h, &partId, perturbation);
for (size_t i = 0; i < type + 1; ++i) offset[i] = particles;
cj = make_cell(particles, offset, h, &partId, perturbation);
time = 0;
for (size_t i = 0; i < runs; ++i) {
/* Zero the fields */
zero_particle_fields(ci);
zero_particle_fields(cj);
tic = getticks();
/* Run the test */
runner_dopair1_density(&runner, ci, cj);
toc = getticks();
time += toc - tic;
/* Dump if necessary */
if (i % 50 == 0) {
sprintf(outputFileName, "swift_dopair_27_%s.dat", outputFileNameExtension);
dump_particle_fields(outputFileName, ci, cj);
}
}
/* Output timing */
message("SWIFT calculation took %lli ticks.", time / runs);
/* Now perform a brute-force version for accuracy tests */
/* Zero the fields */
zero_particle_fields(ci);
zero_particle_fields(cj);
tic = getticks();
/* Run the brute-force test */
pairs_all_density(&runner, ci, cj);
toc = getticks();
/* Dump */
sprintf(outputFileName, "brute_force_27_%s.dat", outputFileNameExtension);
dump_particle_fields(outputFileName, ci, cj);
/* Output timing */
message("Brute force calculation took %lli ticks.", toc - tic);
/* Clean things to make the sanitizer happy ... */
clean_up(ci);
clean_up(cj);
return 0;
}
#!/bin/bash
rm brute_force_27_standard.dat swift_dopair_27_standard.dat
./test27cells -p 6 -r 1 -d 0 -f standard
python difffloat.py brute_force_27_standard.dat swift_dopair_27_standard.dat 1e-5 5e-6
exit $?
#!/bin/bash
rm brute_force_27_perturbed.dat swift_dopair_27_perturbed.dat
./test27cells -p 6 -r 1 -d 0.1 -f perturbed
python difffloat.py brute_force_27_perturbed.dat swift_dopair_27_perturbed.dat 1e-5 5e-6
exit $?
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