Created
June 25, 2013 22:55
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Test of Transactional Memory
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| #include <stdio.h> | |
| #include <stdlib.h> | |
| #include <pthread.h> | |
| static double zr = 0.0; | |
| static double zi = 0.0; | |
| static const double cr = 0.1; | |
| static const double ci = 0.1; | |
| #ifndef TSX | |
| static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; | |
| #endif | |
| static void | |
| *run(void *arg) | |
| { | |
| for (int i = 0; i < 1000000; ++i) { | |
| #ifdef TSX | |
| __transaction_atomic | |
| { | |
| #else | |
| pthread_mutex_lock(&mutex); | |
| #endif | |
| double newzr = zr * zr - zi * zi + cr; | |
| double newzi = 2 * zr * zi + ci; | |
| zr = newzr; | |
| zi = newzi; | |
| #ifdef TSX | |
| } | |
| #else | |
| pthread_mutex_unlock(&mutex); | |
| #endif | |
| } | |
| return 0; | |
| } | |
| int | |
| main(int argc, char **argv) | |
| { | |
| int n = atoi(argv[1]); | |
| pthread_t *threads = new pthread_t[n]; | |
| for (int i = 0; i < n; ++i) { | |
| pthread_create(&threads[i], 0, run, 0); | |
| } | |
| for (int i = 0; i < n; ++i) { | |
| pthread_join(threads[i], 0); | |
| } | |
| printf("%f + %fi\n", zr, zi); | |
| return 0; | |
| } |
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