void mutate(gsl_matrix *chromosome, gsl_matrix *bounds, pcg32_random_t *rng)
{
uint32_t rows = chromosome->size1,
cols = chromosome->size2,
row,
col;
double r, min, max;
// Select a random row and column
row = (uint32_t)pcg32_boundedrand_r(rng, rows);
col = (uint32_t)pcg32_boundedrand_r(rng, cols);
// Set to a random value within the bounds
min = gsl_matrix_get(bounds, col, 0);
max = gsl_matrix_get(bounds, col, 1);
r = (ldexp(pcg32_random_r(rng), -32) * (max - min)) + min;
gsl_matrix_set(chromosome, row, col, r);
if (DEBUG == DEBUG_MUTATE)
{
printf(YELLOW "MUTATED CHROMSOME\n" RESET);
printf(YELLOW "ROW: %d, COL: %d, VAL: %10.6f\n" RESET, row, col, r);
for (uint32_t i = 0; i < rows; ++i)
{
for (uint32_t j = 0; j < cols; ++j)
{
printf(YELLOW "%10.6f " RESET, gsl_matrix_get(chromosome, i, j));
}
printf("\n");
}
}
}
void choice_floyd(pcg32_random_t *rng, int *values, int M, int N) {
/*
Floyd's algorithm for returning a list of M random numbers in the range
0,...,N-1. Preferable to Knuth's method when M << N (though Knuth is still
viable). Uses Melissa O'Neil's PCG generator.
*/
int in;
int im = 0;
unsigned char *is_used = malloc(N*sizeof(unsigned char));
for (int i = 0; i < N; i++) {
is_used[i] = 0;
}
for(in = N - M; in < N && im < M; ++in) {
int r = pcg32_boundedrand_r(rng,N-1);
if (is_used[r]) {
r = in;
}
values[im++] = r;
is_used[r] = 1;
}
free(is_used);
}
/*
* Generates uniformly random keys [0, MAX_KEY_VAL] on each rank using the time and rank
* number as a seed
*/
static KEY_TYPE * make_input(void)
{
timer_start(&timers[TIMER_INPUT]);
KEY_TYPE * restrict const my_keys = malloc(NUM_KEYS_PER_PE * sizeof(KEY_TYPE));
pcg32_random_t rng = seed_my_rank();
for(uint64_t i = 0; i < NUM_KEYS_PER_PE; ++i) {
my_keys[i] = pcg32_boundedrand_r(&rng, MAX_KEY_VAL);
}
timer_stop(&timers[TIMER_INPUT]);
#ifdef DEBUG
wait_my_turn();
char msg[1024];
const int my_rank = shmem_my_pe();
sprintf(msg,"Rank %d: Initial Keys: ", my_rank);
for(uint64_t i = 0; i < NUM_KEYS_PER_PE; ++i){
if(i < PRINT_MAX)
sprintf(msg + strlen(msg),"%d ", my_keys[i]);
}
sprintf(msg + strlen(msg),"\n");
printf("%s",msg);
fflush(stdout);
my_turn_complete();
#endif
return my_keys;
}
void dostep(world *w){
int nextbind = pcg32_boundedrand_r(&rng, w->nbonds); //ran_int(0, w->nbonds);
int nextbond = w->bonds[nextbind];
double test = ldexp(pcg32_random_r(&rng), -32);
int ind0, ind1;
bond2inds(w->N, nextbond, &ind0, &ind1);
int ind = 0;
int tx, ty;
if (w->grid[ind0] == w->grid[ind1]){
remove_bond(w, nextbond);
return;
}
if (test < 1.0/(1+w->alpha)){
ind = ind0 * (w->grid[ind0] == SS) + ind1 * (w->grid[ind1] == SS);
ind2xy(w->N, ind, &tx, &ty);
add_zombie(w, tx, ty);
} else {
ind = ind0 * (w->grid[ind0] == SZ) + ind1 * (w->grid[ind1] == SZ);
ind2xy(w->N, ind, &tx, &ty);
kill_site(w, tx, ty);
}
}
/*
* Generates uniformly random keys [0, MAX_KEY_VAL] on each rank using the time and rank
* number as a seed
*/
static KEY_TYPE * make_input(void)
{
timer_start(&timers[TIMER_INPUT]);
KEY_TYPE * const my_keys = malloc(NUM_KEYS_PER_PE * sizeof(KEY_TYPE));
assert(my_keys);
pcg32_random_t rng = seed_my_rank();
#ifdef ISX_PROFILING
unsigned long long start = current_time_ns();
#endif
for(uint64_t i = 0; i < NUM_KEYS_PER_PE; ++i) {
my_keys[i] = pcg32_boundedrand_r(&rng, MAX_KEY_VAL);
}
#ifdef ISX_PROFILING
unsigned long long end = current_time_ns();
if (shmem_my_pe() == 0)
printf("Making input took %llu ns\n", end - start);
#endif
timer_stop(&timers[TIMER_INPUT]);
#ifdef DEBUG
wait_my_turn();
char msg[1024];
const int my_rank = shmem_my_pe();
sprintf(msg,"Rank %d: Initial Keys: ", my_rank);
for(uint64_t i = 0; i < NUM_KEYS_PER_PE; ++i){
if(i < PRINT_MAX)
sprintf(msg + strlen(msg),"%d ", my_keys[i]);
}
sprintf(msg + strlen(msg),"\n");
printf("%s",msg);
fflush(stdout);
my_turn_complete();
#endif
return my_keys;
}
/*
Delete a single file
@return Zero on successful wipe
*/
int deleteFile(char fileName[], int passes) {
pcg32_random_t rng;
// chmod if requested (-a)
if (forceFiles) {
removeAttribute(fileName);
}
if (access(fileName,W_OK) == 0) {
printf("\nWiping %s...",fileName);
FILE *fp = fopen(fileName,"rb+");
// Move to end of file to get a correct result from ftell
fseek(fp, 0, SEEK_END);
int fileSize = ftell(fp);
// Wipe file
int wipeCounter;
for (wipeCounter = 0; wipeCounter < passes; wipeCounter++) {
int offsetCounter;
// Reset position
fseek(fp,0,SEEK_SET);
for (offsetCounter = 0; offsetCounter < fileSize; offsetCounter++) {
int rand = pcg32_boundedrand_r(&rng,256);
fprintf(fp,"%c",rand);
}
}
fclose(fp);
if (!keepFiles) {
printf("\nScrambling and deleting %s...",fileName);
scrambleName(fileName,25);
}
}
else {
printf("\nERROR: Cannot get write access to %s (try running with -a arg)",fileName);
return -1;
}
return 0;
}
uint32_t pcg32_boundedrand(uint32_t bound)
{
return pcg32_boundedrand_r(&pcg32_global, bound);
}
void crossover(gsl_matrix *parent1, gsl_matrix *parent2, pcg32_random_t *rng)
{
uint32_t rows = parent1->size1,
cols = parent1->size2;
uint32_t cut = (uint32_t)pcg32_boundedrand_r(rng, rows-1) + 1;
bool left = (bool)pcg32_boundedrand_r(rng, 2);
gsl_matrix *temp = gsl_matrix_alloc(1, cols);
if (DEBUG == DEBUG_CROSSOVER)
{
printf(YELLOW "CROSSOVER CENTROIDS BEFORE\n" RESET);
printf(YELLOW "CHROMSOME CUT POINT: %d\n", cut);
printf(YELLOW "CROSSOVER SIDE: %s\n", left ? "left" : "right");
printf(YELLOW "PARENT[1]:\n" RESET);
for (uint32_t i = 0; i < rows; ++i)
{
for (uint32_t j = 0; j < cols; ++j)
{
printf(YELLOW "%10.6f " RESET, gsl_matrix_get(parent1, i, j));
}
printf("\n");
}
printf(YELLOW "PARENT[2]:\n" RESET);
for (uint32_t i = 0; i < rows; ++i)
{
for (uint32_t j = 0; j < cols; ++j)
{
printf(YELLOW "%10.6f " RESET, gsl_matrix_get(parent2, i, j));
}
printf("\n");
}
}
if (left)
{
// Swap left half of chromosome
for (uint32_t i = 0; i < cut; ++i)
{
gsl_vector_view parent1_row = gsl_matrix_row(parent1, i);
gsl_vector_view parent2_row = gsl_matrix_row(parent2, i);
gsl_vector_view temp_row = gsl_matrix_row(temp, 0);
gsl_vector_memcpy(&temp_row.vector, &parent2_row.vector);
gsl_vector_memcpy(&parent2_row.vector, &parent1_row.vector);
gsl_vector_memcpy(&parent1_row.vector, &temp_row.vector);
}
}
else
{
// Swap the right half of chromosome
for (uint32_t i = cut; i < rows; ++i)
{
gsl_vector_view parent1_row = gsl_matrix_row(parent1, i);
gsl_vector_view parent2_row = gsl_matrix_row(parent2, i);
gsl_vector_view temp_row = gsl_matrix_row(temp, 0);
gsl_vector_memcpy(&temp_row.vector, &parent2_row.vector);
gsl_vector_memcpy(&parent2_row.vector, &parent1_row.vector);
gsl_vector_memcpy(&parent1_row.vector, &temp_row.vector);
}
}
if (DEBUG == DEBUG_CROSSOVER)
{
printf(YELLOW "CROSSOVER CENTROIDS AFTER\n" RESET);
printf(YELLOW "CHROMSOME CUT POINT: %d\n", cut);
printf(YELLOW "CROSSOVER SIDE: %s\n", left ? "left" : "right");
printf(YELLOW "PARENT[1]:\n" RESET);
for (uint32_t i = 0; i < rows; ++i)
{
for (uint32_t j = 0; j < cols; ++j)
{
printf(YELLOW "%10.6f " RESET, gsl_matrix_get(parent1, i, j));
}
printf("\n");
}
printf(YELLOW "PARENT[2]:\n" RESET);
for (uint32_t i = 0; i < rows; ++i)
{
for (uint32_t j = 0; j < cols; ++j)
{
printf(YELLOW "%10.6f " RESET, gsl_matrix_get(parent2, i, j));
}
printf("\n");
}
}
gsl_matrix_free(temp);
}
int main(int argc, char** argv)
{
// Read command-line options
int rounds = 5;
bool nondeterministic_seed = false;
int round, i;
++argv;
--argc;
if (argc > 0 && strcmp(argv[0], "-r") == 0) {
nondeterministic_seed = true;
++argv;
--argc;
}
if (argc > 0) {
rounds = atoi(argv[0]);
}
// In this version of the code, we'll use a local rng, rather than the
// global one.
pcg32_random_t rng;
// You should *always* seed the RNG. The usual time to do it is the
// point in time when you create RNG (typically at the beginning of the
// program).
//
// pcg32_srandom_r takes two 64-bit constants (the initial state, and the
// rng sequence selector; rngs with different sequence selectors will
// *never* have random sequences that coincide, at all) - the code below
// shows three possible ways to do so.
if (nondeterministic_seed) {
// Seed with external entropy -- the time and some program addresses
// (which will actually be somewhat random on most modern systems).
// A better solution, entropy_getbytes, using /dev/random, is provided
// in the full library.
pcg32_srandom_r(&rng, time(NULL) ^ (intptr_t)&printf,
(intptr_t)&rounds);
} else {
// Seed with a fixed constant
pcg32_srandom_r(&rng, 42u, 54u);
}
printf("pcg32_random_r:\n"
" - result: 32-bit unsigned int (uint32_t)\n"
" - period: 2^64 (* 2^63 streams)\n"
" - state type: pcg32_random_t (%zu bytes)\n"
" - output func: XSH-RR\n"
"\n",
sizeof(pcg32_random_t));
for (round = 1; round <= rounds; ++round) {
printf("Round %d:\n", round);
/* Make some 32-bit numbers */
printf(" 32bit:");
for (i = 0; i < 6; ++i)
printf(" 0x%08x", pcg32_random_r(&rng));
printf("\n");
/* Toss some coins */
printf(" Coins: ");
for (i = 0; i < 65; ++i)
printf("%c", pcg32_boundedrand_r(&rng, 2) ? 'H' : 'T');
printf("\n");
/* Roll some dice */
printf(" Rolls:");
for (i = 0; i < 33; ++i) {
printf(" %d", (int)pcg32_boundedrand_r(&rng, 6) + 1);
}
printf("\n");
/* Deal some cards */
enum { SUITS = 4, NUMBERS = 13, CARDS = 52 };
char cards[CARDS];
for (i = 0; i < CARDS; ++i)
cards[i] = i;
for (i = CARDS; i > 1; --i) {
int chosen = pcg32_boundedrand_r(&rng, i);
char card = cards[chosen];
cards[chosen] = cards[i - 1];
cards[i - 1] = card;
}
printf(" Cards:");
static const char number[] = {'A', '2', '3', '4', '5', '6', '7',
'8', '9', 'T', 'J', 'Q', 'K'};
static const char suit[] = {'h', 'c', 'd', 's'};
for (i = 0; i < CARDS; ++i) {
printf(" %c%c", number[cards[i] / SUITS], suit[cards[i] % SUITS]);
if ((i + 1) % 22 == 0)
printf("\n\t");
}
printf("\n");
printf("\n");
}
return 0;
}