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feat: add much faster time to botec example, using parallelism

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NunoSempere 2023-11-19 15:40:46 +00:00
parent 514a41c9f7
commit f6af0c33fa
2 changed files with 33 additions and 0 deletions
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examples/more/12_time_to_botec_parallel/example Executable file
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examples/more/12_time_to_botec_parallel/example.c Normal file
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#include "../../../squiggle.h"
#include "../../../squiggle_more.h"
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
int main()
{
double p_a = 0.8;
double p_b = 0.5;
double p_c = p_a * p_b;
double sample_0(uint64_t* seed){ return 0; }
double sample_1(uint64_t* seed) { return 1; }
double sample_few(uint64_t* seed) { return sample_to(1, 3, seed); }
double sample_many(uint64_t* seed) { return sample_to(2, 10, seed); }
int n_dists = 4;
double weights[] = { 1 - p_c, p_c / 2, p_c / 4, p_c / 4 };
double (*samplers[])(uint64_t*) = { sample_0, sample_1, sample_few, sample_many };
double sampler_result(uint64_t* seed) {
return sample_mixture(samplers, weights, n_dists, seed);
}
int n_samples = 1000 * 1000;
int n_threads = 16;
double* results = malloc(n_samples * sizeof(double));
parallel_sampler(sampler_result, results, n_threads, n_samples);
double avg = array_sum(results, n_samples)/n_samples;
printf("Avg: %f", avg);
free(results);
}