112 lines
2.3 KiB
C
112 lines
2.3 KiB
C
#include <pthread.h>
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#include <stdio.h>
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#include <stdlib.h>
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#define USE_THREAD
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#include <mt_list.h>
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/* Stress test for mt_lists. Compile this way:
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* cc -O2 -o test-list test-list.c -I../include -pthread
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* The only argument it takes is the number of threads to be used.
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* ./test-list 4
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*/
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struct mt_list pouet_list = MT_LIST_HEAD_INIT(pouet_list);
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#define MAX_ACTION 5000000
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__thread unsigned int tid;
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struct pouet_lol {
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struct mt_list list_elt;
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};
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/* Fixed RNG sequence to ease reproduction of measurements (will be offset by
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* the thread number).
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*/
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__thread uint32_t rnd32_state = 2463534242U;
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/* Xorshift RNG from http://www.jstatsoft.org/v08/i14/paper */
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static inline uint32_t rnd32()
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{
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rnd32_state ^= rnd32_state << 13;
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rnd32_state ^= rnd32_state >> 17;
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rnd32_state ^= rnd32_state << 5;
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return rnd32_state;
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}
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void *thread(void *pouet)
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{
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struct pouet_lol *lol;
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struct mt_list elt2;
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tid = (uintptr_t)pouet;
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int i;
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rnd32_state += tid;
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for (i = 0; i < MAX_ACTION; i++) {
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switch (rnd32() % 4) {
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case 0:
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lol = malloc(sizeof(*lol));
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MT_LIST_INIT(&lol->list_elt);
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MT_LIST_TRY_INSERT(&pouet_list, &lol->list_elt);
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break;
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case 1:
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lol = malloc(sizeof(*lol));
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MT_LIST_INIT(&lol->list_elt);
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MT_LIST_TRY_APPEND(&pouet_list, &lol->list_elt);
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break;
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case 2:
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lol = MT_LIST_POP(&pouet_list, struct pouet_lol *, list_elt);
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if (lol)
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free(lol);
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break;
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case 3:
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MT_LIST_FOR_EACH_ENTRY_LOCKED(lol, &pouet_list, list_elt, elt2) {
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if (rnd32() % 2) {
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free(lol);
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lol = NULL;
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}
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if (rnd32() % 2) {
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break;
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}
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}
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break;
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default:
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break;
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}
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if ((i) / (MAX_ACTION/10) != (i+1) / (MAX_ACTION/10))
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printf("%u: %d\n", tid, i+1);
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}
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return NULL;
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}
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int main(int argc, char *argv[])
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{
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int nb;
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pthread_t *pth;
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srandom(time(NULL));
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if (argc != 2) {
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printf("Usage: %s <nb_threads>\n", argv[0]);
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exit(1);
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}
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nb = atoi(argv[1]);
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#if 0
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if (nb < 2) {
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printf("Need at least 2 threads.\n");
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exit(1);
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}
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#endif
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pth = malloc(nb * sizeof(*pth));
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if (pth == NULL) {
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printf("Shot failed to connect.\n");
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exit(1);
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}
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for (int i = 0; i < nb; i++) {
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pthread_create(&pth[i], NULL, thread, (void *)(uintptr_t)i);
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}
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for (int i = 0; i < nb; i++)
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pthread_join(pth[i], NULL);
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return 0;
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}
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