void
main_loop_io_worker_init(void)
{
main_loop_io_workers.max_threads = MIN(MAX(MAIN_LOOP_MIN_WORKER_THREADS, get_processor_count()), MAIN_LOOP_MAX_WORKER_THREADS);
main_loop_io_workers.thread_start = (void (*)(void *)) main_loop_worker_thread_start;
main_loop_io_workers.thread_stop = (void (*)(void *)) main_loop_worker_thread_stop;
iv_work_pool_create(&main_loop_io_workers);
log_queue_set_max_threads(MIN(main_loop_io_workers.max_threads, MAIN_LOOP_MAX_WORKER_THREADS));
}
int main(void)
{
pool.preload_threads(8); // reserve 8 threads for work
printf("This PC has %d processors\n", get_processor_count());
for (int numThreads = 1; numThreads <= MAX_THREADS_TO_RUN; numThreads *= 2) {
printf("Using %d processors for internal calculations.\n", numThreads);
DoWork dowork(numThreads);
time_t xt = time(NULL);
pool.run(&dowork, numThreads);
xt = time(NULL) - xt;
double sum = 0;
for (int i = 0; i < numThreads; i++) {
printf("Processor %d gave %.5lf as result\n", i, dowork.data[i]);
sum += dowork.data[i];
}
printf("pi = %.9lf\n", sqrt(sum * 6.0));
printf("Result produced in %u sec\n", (unsigned)xt);
}
return 0;
}