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updated N-GenIC RNG to multithreading

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This commit is contained in:
Oliver Hahn 2024-02-27 01:59:49 +08:00
parent 75587bbf26
commit b6cef8dd01
1 changed files with 59 additions and 52 deletions
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111
src/plugins/random_music_wnoise_generator.cc
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@ -48,77 +48,84 @@ void music_wnoise_generator<T>:: gen_topgrid_NGenIC(size_t res, long baseseed) {
for (j = 0; j < i + 1; j++)
seedtable[(res - 1 - j) * res + (res - 1 - i)] = 0x7fffffff * gsl_rng_uniform(random_generator);
}
gsl_rng_free( random_generator );
real_t *rnoise = new real_t[res * res * (res + 2)];
complex_t *knoise = reinterpret_cast<complex_t *>(rnoise);
double fnorm = pow((double)res, -1.5);
// /#warning need to check for race conditions below
//#pragma omp parallel for
for (size_t i = 0; i < res; i++) {
int ii = (int)res - (int)i;
if (ii == (int)res)
ii = 0;
// launch threads with indendent RNGs
#pragma omp parallel
{
gsl_rng *thread_rng = gsl_rng_alloc(gsl_rng_ranlxd1);
for (size_t j = 0; j < res; j++) {
gsl_rng_set(random_generator, seedtable[i * res + j]);
for (size_t k = 0; k < res / 2; k++) {
double phase = gsl_rng_uniform(random_generator) * 2 * M_PI;
double ampl;
do {
ampl = gsl_rng_uniform(random_generator);
} while (ampl == 0);
#pragma omp for
for (size_t i = 0; i < res; i++) {
int ii = (int)res - (int)i;
if (ii == (int)res)
ii = 0;
if (i == res / 2 || j == res / 2 || k == res / 2)
continue;
if (i == 0 && j == 0 && k == 0)
continue;
for (size_t j = 0; j < res; j++) {
gsl_rng_set(thread_rng, seedtable[i * res + j]);
for (size_t k = 0; k < res / 2; k++) {
double phase = gsl_rng_uniform(thread_rng) * 2 * M_PI;
double ampl;
do {
ampl = gsl_rng_uniform(thread_rng);
} while (ampl == 0);
T rp = -sqrt(-log(ampl)) * cos(phase) * fnorm;
T ip = -sqrt(-log(ampl)) * sin(phase) * fnorm;
if (i == res / 2 || j == res / 2 || k == res / 2)
continue;
if (i == 0 && j == 0 && k == 0)
continue;
if (k > 0) {
RE(knoise[(i * res + j) * (res / 2 + 1) + k]) = rp;
IM(knoise[(i * res + j) * (res / 2 + 1) + k]) = ip;
} else /* k=0 plane needs special treatment */
{
if (i == 0) {
if (j >= res / 2) {
continue;
T rp = -sqrt(-log(ampl)) * cos(phase) * fnorm;
T ip = -sqrt(-log(ampl)) * sin(phase) * fnorm;
if (k > 0) {
RE(knoise[(i * res + j) * (res / 2 + 1) + k]) = rp;
IM(knoise[(i * res + j) * (res / 2 + 1) + k]) = ip;
} else /* k=0 plane needs special treatment */
{
if (i == 0) {
if (j >= res / 2) {
continue;
} else {
int jj =
(int)res - (int)j; /* note: j!=0 surely holds at this point */
RE(knoise[(i * res + j) * (res / 2 + 1) + k]) = rp;
IM(knoise[(i * res + j) * (res / 2 + 1) + k]) = ip;
RE(knoise[(i * res + jj) * (res / 2 + 1) + k]) = rp;
IM(knoise[(i * res + jj) * (res / 2 + 1) + k]) = -ip;
}
} else {
int jj =
(int)res - (int)j; /* note: j!=0 surely holds at this point */
if (i >= res / 2) {
continue;
} else {
int ii = (int)res - (int)i;
if (ii == (int)res)
ii = 0;
int jj = (int)res - (int)j;
if (jj == (int)res)
jj = 0;
RE(knoise[(i * res + j) * (res / 2 + 1) + k]) = rp;
IM(knoise[(i * res + j) * (res / 2 + 1) + k]) = ip;
RE(knoise[(i * res + j) * (res / 2 + 1) + k]) = rp;
IM(knoise[(i * res + j) * (res / 2 + 1) + k]) = ip;
RE(knoise[(i * res + jj) * (res / 2 + 1) + k]) = rp;
IM(knoise[(i * res + jj) * (res / 2 + 1) + k]) = -ip;
}
} else {
if (i >= res / 2) {
continue;
} else {
int ii = (int)res - (int)i;
if (ii == (int)res)
ii = 0;
int jj = (int)res - (int)j;
if (jj == (int)res)
jj = 0;
RE(knoise[(i * res + j) * (res / 2 + 1) + k]) = rp;
IM(knoise[(i * res + j) * (res / 2 + 1) + k]) = ip;
if (ii >= 0 && ii < (int)res) {
RE(knoise[(ii * res + jj) * (res / 2 + 1) + k]) = rp;
IM(knoise[(ii * res + jj) * (res / 2 + 1) + k]) = -ip;
if (ii >= 0 && ii < (int)res) {
RE(knoise[(ii * res + jj) * (res / 2 + 1) + k]) = rp;
IM(knoise[(ii * res + jj) * (res / 2 + 1) + k]) = -ip;
}
}
}
}
}
}
}
gsl_rng_free( thread_rng );
}
delete[] seedtable;